{"title":"Power \u0026 Relay","description":"\u003ch2 data-path-to-node=\"6\"\u003eReliable Power Supply \u0026amp; Relay Modules for Electronic Projects\u003c\/h2\u003e\n\u003cp data-path-to-node=\"7\"\u003eExplore our comprehensive range of power management and control components designed for STEM education, DIY electronics, and professional engineering applications. From stable voltage regulation to safe battery storage, we provide the essential hardware to keep your circuits running efficiently and securely.\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"8\"\u003eKey Components for Your Circuit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"9,0,0\"\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"9,0,0\"\u003eDC-DC Converters \u0026amp; Voltage Regulators:\u003c\/b\u003e Efficient step-down (buck) and step-up (boost) modules for precise voltage control in complex setups.\u003c\/li\u003e\n\u003cli data-path-to-node=\"9,1,0\"\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"9,1,0\"\u003eRelay Modules:\u003c\/b\u003e Securely control high-voltage appliances using low-power microcontroller signals, perfectly compatible with Arduino and ESP32.\u003c\/li\u003e\n\u003cli data-path-to-node=\"9,2,0\"\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"9,2,0\"\u003eBattery Solutions:\u003c\/b\u003e A wide selection of 18650 LiPo batteries, safe BMS protection boards, and durable battery holders for portable power needs.\u003c\/li\u003e\n\u003cli data-path-to-node=\"9,3,0\"\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"9,3,0\"\u003ePower Adapters:\u003c\/b\u003e Stable AC to DC power supplies ensuring continuous and reliable device operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"10\"\u003eHow to Choose the Right Power Component?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"11,0,0\"\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"11,0,0\"\u003eVoltage Requirements:\u003c\/b\u003e Ensure your step-down\/step-up modules match the exact input and output voltage of your specific motherboard and peripherals.\u003c\/li\u003e\n\u003cli data-path-to-node=\"11,1,0\"\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"11,1,0\"\u003eCurrent Rating (Amperage):\u003c\/b\u003e Select power adapters and relays that can easily handle the maximum current load of your project to prevent overheating.\u003c\/li\u003e\n\u003cli data-path-to-node=\"11,2,0\"\u003e\n\u003cb data-index-in-node=\"0\" data-path-to-node=\"11,2,0\"\u003eSafety Features:\u003c\/b\u003e When working with portable power, always opt for battery chargers and BMS modules with built-in overcharge and short-circuit protection.\u003c\/li\u003e\n\u003c\/ul\u003e","products":[{"product_id":"micro-bit-battery-holder-with-switch-2xaaa","title":"Microbit AAAx2 3V Battery Holder with Switch – JST Connector","description":"\u003cp class=\"my-0\"\u003eEasily power your BBC micro:bit projects with this 2xAAA battery holder featuring a convenient on\/off switch. The included JST connector perfectly fits the micro:bit’s power socket, making it simple to create portable, battery-powered projects—no soldering required. The durable case ensures your batteries stay secure, while the compact design (approx. 63mm x 24mm x 15mm) makes it ideal for classroom, STEM, and DIY electronics use.\u003c\/p\u003e\n\u003cp class=\"my-0\"\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"my-0\"\u003eCompatible JST connector for micro:bit\u003c\/li\u003e\n\u003cli class=\"my-0\"\u003eBuilt-in ON\/OFF switch for easy power control\u003c\/li\u003e\n\u003cli class=\"my-0\"\u003eHolds 2 x AAA batteries (not included)\u003c\/li\u003e\n\u003cli class=\"my-0\"\u003eCompact size: 63mm x 24mm x 15mm\u003c\/li\u003e\n\u003cli class=\"my-0\"\u003eDurable, lightweight, and portable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"my-0\"\u003ePerfect for students, makers, and anyone looking to add reliable battery power to their micro:bit projects!\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":35517747626135,"sku":"","price":6.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/microbit-battery-holder-2xAAA-switch-1.jpg?v=1761903118"},{"product_id":"usb-charger-step-down-buck-power-supply-module","title":"High-Efficiency DC 9-36V to 5V 3A Dual USB Buck Converter Module","description":"\u003ch2\u003e\u003cb\u003eUnleash Portable Power for All Your USB Devices!\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eAre you looking for a reliable and efficient way to power your 5V USB devices from a wider voltage range? Our \u003cb\u003eDC 9V\/12V\/24V\/36V to 5V 3A Dual USB Charger Step Down Buck Power Supply Module\u003c\/b\u003e is the perfect solution for your portable power needs, DIY electronics projects, and automotive applications.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eKey Features \u0026amp; Benefits:\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eWide Input Voltage Range:\u003c\/b\u003e Accepts DC input from 9V to 36V, making it incredibly versatile for various power sources, including 12V and 24V battery systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDual USB Output:\u003c\/b\u003e Equipped with two USB ports, allowing you to charge or power two 5V devices simultaneously.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHigh Current Output:\u003c\/b\u003e Delivers a robust 3A (MAX) output, ensuring fast and efficient charging for smartphones, tablets, and other USB-powered gadgets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHigh Efficiency:\u003c\/b\u003e With an impressive efficiency of up to 92%, this buck converter minimizes energy loss and maximizes power delivery to your devices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCompact \u0026amp; Durable Design:\u003c\/b\u003e Measuring just 50x35mm, its compact size makes it easy to integrate into any project. The robust construction ensures long-lasting performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVersatile Applications:\u003c\/b\u003e Ideal for mobile power banks, charging mobile phones and tablets, powering small 5V USB devices, automotive charging solutions, and various DIY electronics projects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eTechnical Specifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eInput Voltage:\u003c\/b\u003e DC 9V-36V (via 5.5x2.1mm DC barrel jack or screw terminal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOutput Voltage:\u003c\/b\u003e DC 5V\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOutput Current:\u003c\/b\u003e 3A (Maximum)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEfficiency:\u003c\/b\u003e Up to 92% (MAX)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSwitching Frequency:\u003c\/b\u003e 150KHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eLoad Capacity:\u003c\/b\u003e Maximum output 3A\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOperating Temperature:\u003c\/b\u003e -40 ℃ to + 85 ℃\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDimensions:\u003c\/b\u003e 50mm x 35mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eColor:\u003c\/b\u003e Multicolor (as pictured)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eApplications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMobile Power Banks\u003c\/li\u003e\n\u003cli\u003eCharging Smartphones and Tablets\u003c\/li\u003e\n\u003cli\u003ePowering Raspberry Pi, Arduino, and other 5V development boards\u003c\/li\u003e\n\u003cli\u003eDIY USB Charging Stations\u003c\/li\u003e\n\u003cli\u003eAutomotive USB Power Outlets\u003c\/li\u003e\n\u003cli\u003eAnd many more applications requiring a stable 5V power supply from a higher DC input!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eGet yours today and experience reliable 5V power wherever you need it!\u003c\/b\u003e\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":35696777724055,"sku":"21PA000593","price":25.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/dc-buck-converter-dual-usb-top.jpg?v=1776336259"},{"product_id":"lithium-li-ion-18650-3-7v-battery-charger-board","title":"Adjustable 3.7V Lithium Battery Boost Charger Module (5-27V Output)","description":"\u003ch2\u003e\u003cb\u003eUnleash Versatility with Our 3.7V Lithium Battery Boost Charger Module!\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eThis compact and powerful module is an essential tool for DIY enthusiasts, electronics hobbyists, and anyone looking to efficiently charge 3.7V lithium batteries while simultaneously boosting the output voltage for various applications. Whether you're upgrading a multimeter, powering custom projects, or building portable solutions, this module offers unparalleled flexibility.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eKey Features:\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eWide Input Voltage Range:\u003c\/b\u003e Accepts 4.5V to 8V, making it compatible with various power sources, including 5V solar panels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAdjustable Output Voltage (4.3V - 27V):\u003c\/b\u003e Easily set the precise output voltage required for your specific project. Simply turn the potentiometer counter-clockwise to increase the voltage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIntegrated Lithium Battery Charger:\u003c\/b\u003e Features a dedicated BAT+ output for charging 3.7V lithium-ion batteries (e.g., 18650 cells) with a charging voltage of 4.2V and a maximum current of 1A.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHigh Discharge Current:\u003c\/b\u003e Supports a maximum discharge current of 2A, providing robust power for your applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOvercharge Protection:\u003c\/b\u003e Built-in overcharge protection ensures the safety and longevity of your batteries.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCompact Design:\u003c\/b\u003e With dimensions of 3.3cm x 2.3cm x 0.9cm, it's perfect for integration into space-constrained projects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eLow Static Current:\u003c\/b\u003e Consumes only about 0.5mA in static mode, minimizing power drain.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eHow it Works:\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThis module functions as both a boost converter and a lithium battery charger. You can connect your input power (e.g., a 5V solar panel) to the VIN+ and VIN- terminals. The BAT+ and BAT- terminals are designed for connecting your 3.7V lithium battery for charging. Simultaneously, the OUT+ and OUT- terminals provide an adjustable boosted voltage (4.3V to 27V) for powering your desired devices.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eIdeal for:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eModifying multimeters\u003c\/li\u003e\n\u003cli\u003eDIY portable power banks\u003c\/li\u003e\n\u003cli\u003eCustom electronics projects\u003c\/li\u003e\n\u003cli\u003eSolar charging solutions\u003c\/li\u003e\n\u003cli\u003eAnd much more!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eImportant Notes:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDefault Output:\u003c\/b\u003e The default output voltage is approximately 9V. Please adjust the potentiometer to your desired output before use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOutput Current Calculation:\u003c\/b\u003e The output current needs to be calculated based on your specific load. Reference maximum output currents are 1.4A at 5V, 0.8A at 9V, and 0.6A at 12V.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOver-discharge Protection:\u003c\/b\u003e While there is a 2V boost cutoff, true over-discharge protection that completely locks the output is not present. Consider adding an external protection board for critical applications if deep discharge is a concern.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":35696922919063,"sku":"21PA000591","price":20.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/adjustable-3-7v-lithium-battery-boost-charger-module-5-27v-output.jpg?v=1777558011"},{"product_id":"boost-converter-lcd-display-dc-11v-50v-step-up-power-supply-module","title":"5A Boost Converter with LCD | DC 9V-45V to 11V-50V Step-Up Module","description":"\u003cp\u003eThis product is a versatile Boost Converter with an LCD display (model ZK-S5X), suitable for various electronic applications, including use as a Step-up Power Module or a battery charger. It features adjustable voltage and current, overcurrent protection, and a built-in display for monitoring input\/output voltage and current.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKey Features:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eBoost Functionality:\u003c\/b\u003e Capable of stepping up input voltage from DC 9V-45V to DC 11V-50V.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAdjustable Output:\u003c\/b\u003e Features CV (Constant Voltage) and CC (Constant Current) potentiometers for precise adjustment of voltage and current.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHigh Efficiency:\u003c\/b\u003e Approximately 96% conversion efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSafety Features:\u003c\/b\u003e Includes short protection, anti-reverse protection, and anti-back-flow protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eLCD Display:\u003c\/b\u003e Provides clear readouts of voltage (0-50V range, resolution 0.05V) and current (0-5A range, resolution 0.005A).\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurable Design:\u003c\/b\u003e Comes with a shell for protection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eTechnical Specifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eInput Voltage:\u003c\/b\u003e DC 9V-45V\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOutput Voltage:\u003c\/b\u003e DC 11V-50V\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOutput Current:\u003c\/b\u003e Maximum 5A (Output disabled if more than 5A)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOutput Power:\u003c\/b\u003e 90W (Natural heat dissipation)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWorking Current:\u003c\/b\u003e Approx. 30mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWorking Temperature:\u003c\/b\u003e -20℃ to 85℃\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":35697234116759,"sku":"","price":79.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/5a-dc-dc-boost-converter-lcd-zk-s5x-9v-45v-to-11v-50v.jpg?v=1777624897"},{"product_id":"li-ion-diy-battery-plastic-case-holder-for-4x3-7v-18650-battery","title":"18650 Battery Holder with Hard Pins - 1, 2, 3, or 4 Slot Options","description":"\u003cp data-sourcepos=\"20:1-20:57\"\u003e\u003cstrong\u003eVersatile 18650 Battery Holders for Your DIY Projects\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-sourcepos=\"22:1-22:401\"\u003eOrganize, protect, and power your electronics with our high-quality 18650 battery holders. Designed for both single-use and rechargeable 18650 batteries, these robust cases feature hard pins for effortless soldering and secure connections. Whether you're building a new power supply system, working on an Arduino project, or simply need to keep your batteries tidy, our holders are the ideal solution.\u003c\/p\u003e\n\u003cp data-sourcepos=\"24:1-24:17\"\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-sourcepos=\"26:1-31:0\"\u003e\n\u003cli data-sourcepos=\"26:1-26:154\"\u003e\n\u003cstrong\u003eMulti-Slot Options:\u003c\/strong\u003e Available in 1-slot, 2-slot, 3-slot, and 4-slot configurations to accommodate various power requirements (3.7V*N battery pack).\u003c\/li\u003e\n\u003cli data-sourcepos=\"27:1-27:135\"\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Made from impact-resistant ABS plastic, ensuring long-lasting durability and protection for your batteries.\u003c\/li\u003e\n\u003cli data-sourcepos=\"28:1-28:136\"\u003e\n\u003cstrong\u003eEasy Integration:\u003c\/strong\u003e Features sturdy hard pins perfect for soldering, making connections simple and reliable for your DIY extensions.\u003c\/li\u003e\n\u003cli data-sourcepos=\"29:1-29:142\"\u003e\n\u003cstrong\u003eLightweight \u0026amp; Portable:\u003c\/strong\u003e Professionally manufactured to be lightweight and easy to carry, enhancing the portability of your projects.\u003c\/li\u003e\n\u003cli data-sourcepos=\"30:1-31:0\"\u003e\n\u003cstrong\u003eIdeal for DIY:\u003c\/strong\u003e A must-have component for electronics applications, custom power banks, and all your Arduino DIY projects.\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-sourcepos=\"39:1-39:19\"\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-sourcepos=\"41:1-45:0\"\u003e\n\u003cli data-sourcepos=\"41:1-41:27\"\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e ABS Plastic\u003c\/li\u003e\n\u003cli data-sourcepos=\"42:1-42:40\"\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Designed for 18650 Batteries\u003c\/li\u003e\n\u003cli data-sourcepos=\"43:1-43:36\"\u003e\n\u003cstrong\u003eInput Voltage:\u003c\/strong\u003e 3.7V (per cell)\u003c\/li\u003e\n\u003cli data-sourcepos=\"44:1-45:0\"\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-sourcepos=\"46:1-46:20\"\u003e\u003cstrong\u003eImportant Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col data-sourcepos=\"48:1-52:0\"\u003e\n\u003cli data-sourcepos=\"48:1-48:70\"\u003ePlease allow for slight size variations due to manual measurement.\u003c\/li\u003e\n\u003cli data-sourcepos=\"49:1-49:54\"\u003eDo not disassemble, repair, or modify the product.\u003c\/li\u003e\n\u003cli data-sourcepos=\"50:1-50:144\"\u003eThis product is designed for small current loads. \u003cstrong\u003eDo NOT connect to high-current loads.\u003c\/strong\u003e Discontinue use if wires become excessively hot.\u003c\/li\u003e\n\u003cli data-sourcepos=\"51:1-52:0\"\u003eAlways monitor battery temperature while in use. Do not charge or use inferior batteries with this product.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"4 slots","offer_id":35733573927063,"sku":"","price":18.0,"currency_code":"HKD","in_stock":true},{"title":"3 slots","offer_id":35733573959831,"sku":"","price":15.0,"currency_code":"HKD","in_stock":true},{"title":"2 slots","offer_id":35733573992599,"sku":"","price":10.0,"currency_code":"HKD","in_stock":true},{"title":"1 slot","offer_id":35733574025367,"sku":"","price":8.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/18650-Battery-Holder-Multiple-Views.jpg?v=1762318757"},{"product_id":"power-adapter-12v-2a","title":"12V 2A 24W AC Power Adapter | UK 3-Pin Plug | 5.5mm x 2.1mm DC Tip","description":"\u003ch2 data-path-to-node=\"7\"\u003eThe Reliable Power Foundation for Your 12V Electronics\u003c\/h2\u003e\n\u003cp data-path-to-node=\"8\"\u003eFinding a replacement \"power brick\" shouldn't be a guessing game. Most electronic failures are caused by inconsistent voltage or poor-quality adapters that overheat. Our \u003cb data-path-to-node=\"8\" data-index-in-node=\"170\"\u003e12V 2A 24W Power Supply\u003c\/b\u003e is engineered to solve these stability issues, providing a clean, \"noise-free\" current to sensitive equipment.\u003c\/p\u003e\n\u003cp data-path-to-node=\"8\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"9\"\u003eUniversal Compatibility for Home and Office\u003c\/h3\u003e\n\u003cp data-path-to-node=\"10\"\u003eWhether you are reviving an old wireless router, installing a new \u003cb data-path-to-node=\"10\" data-index-in-node=\"66\"\u003eCCTV security camera\u003c\/b\u003e, or lighting up your room with \u003cb data-path-to-node=\"10\" data-index-in-node=\"118\"\u003eLED strips\u003c\/b\u003e, this adapter is the \"gold standard\" utility. The \u003cb data-path-to-node=\"10\" data-index-in-node=\"179\"\u003e5.5mm x 2.1mm barrel jack\u003c\/b\u003e is the most common size in the industry, ensuring it fits 90% of 12V consumer electronics.\u003c\/p\u003e\n\u003cp data-path-to-node=\"10\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"11\"\u003eBuilt for Safety and Longevity\u003c\/h3\u003e\n\u003cp data-path-to-node=\"12\"\u003eUnlike uncertified no-name adapters, this unit is \u003cb data-path-to-node=\"12\" data-index-in-node=\"50\"\u003eCE Certified\u003c\/b\u003e. It includes internal safeguards against over-voltage, over-current, and short circuits. The housing is built from flame-retardant material, ensuring that even during 24\/7 operation—like in a surveillance setup—your home remains safe.\u003c\/p\u003e\n\u003cp data-path-to-node=\"12\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"13\"\u003eEfficient Performance, Minimal Heat\u003c\/h3\u003e\n\u003cp data-path-to-node=\"14\"\u003eEfficiency is key to longevity. This adapter utilizes high-quality internal capacitors to minimize energy loss. This means the unit stays cool to the touch even under full load, preventing the thermal degradation that typically kills cheaper power supplies within months.\u003c\/p\u003e","brand":"QY","offers":[{"title":"Default Title","offer_id":35829186232471,"sku":"21PA000277","price":48.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/12v-24w-dc-adapter-technical-label.jpg?v=1773042196"},{"product_id":"dc-5v-relay-module-for-arduino","title":"2-Channel DC 5V Relay Module with Optocoupler for Arduino \u0026 Pi","description":"\u003cp\u003eControl high-voltage AC\/DC devices safely with this versatile 2-Channel DC 5V Relay Module. Designed for seamless integration with a wide range of microcontrollers, this module features built-in optocouplers for reliable isolation and low-level triggering.\u003c\/p\u003e\n\u003cp\u003eWhether you are working on a home automation project, robotics, or an industrial application, this relay expansion board provides a secure interface between your low-voltage control system and high-power peripherals.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKey Features \u0026amp; Benefits:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eBroad Compatibility:\u003c\/b\u003e Integrates effortlessly with popular platforms including Arduino UNO R3, Raspberry Pi, 8051, AVR, PIC, DSP, ARM, STM32, and MSP430.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOptocoupler Isolation:\u003c\/b\u003e Ensures safe operation by providing isolation between the control signal and the relay, protecting your microcontroller from surges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eLow Level Trigger:\u003c\/b\u003e Activate the relay with a low voltage (logic low) signal, compatible with most microcontroller GPIO pins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHigh-Current Capacity:\u003c\/b\u003e Equipped with high-current relays capable of handling AC250V 10A or DC30V 10A.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStatus Indicators:\u003c\/b\u003e Onboard LED indicators provide immediate visual feedback on the relay output status.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEfficient Driver:\u003c\/b\u003e Requires a low driver current of 15-20mA per channel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eCompatibility Details:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eGPIO 3.3V:\u003c\/b\u003e Micro:bit, ESP8266, NodeMCU, etc.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGPIO 5.5V:\u003c\/b\u003e Arduino, Raspberry Pi, etc.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis standard interface expansion board simplifies the connection and control of external circuits, making it an ideal component for any embedded systems enthusiast or professional.\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":35845727191191,"sku":"","price":15.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/2-channel-5v-relay-module-arduino-optocoupler.jpg?v=1760869906"},{"product_id":"tp4056-type-c-usb-5v-1a-18650-lithium-battery-charger-module-charging-board-with-dual-protection-functions","title":"TP4056 Type-C USB 5V 1A Lithium Battery Charger Module","description":"\u003cp\u003e\u003cb\u003eOverview:\u003c\/b\u003e Charge your 18650 lithium batteries safely and efficiently with our TP4056 Type-C USB 5V 1A Lithium Battery Charger Module. This compact and versatile charging board is designed with essential dual protection functions to ensure the longevity and safety of your batteries. Perfect for DIY electronics projects, portable power solutions, and any application requiring reliable lithium-ion battery charging.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKey Features:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eType-C USB Input:\u003c\/b\u003e Modern Type-C port for convenient and reversible connection to 5V power sources.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOptimal Charging:\u003c\/b\u003e Charges 18650 lithium batteries with a dedicated 4.2V ±1% charging termination voltage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHigh Charging Current:\u003c\/b\u003e Delivers up to 1000mA (1A) maximum charging current for quick and efficient charging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDual Protection Functions:\u003c\/b\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eOver-discharge Protection:\u003c\/b\u003e Automatically cuts off power when the battery voltage drops to 2.5V, preventing damage from deep discharge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOver-current Protection:\u003c\/b\u003e Protects against excessive current draw with a 3A over-current protection threshold.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCompact Design:\u003c\/b\u003e Ultra-small board size (2.6 x 1.7 CM) makes it easy to integrate into various projects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCharging Status Indicators:\u003c\/b\u003e Equipped with LED indicators to show charging status (Red for charging, Blue for fully charged).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eTechnical Specifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eInput Voltage:\u003c\/b\u003e 5V DC (via Type-C USB or solder pads)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCharging Termination Voltage:\u003c\/b\u003e 4.2V ±1%\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaximum Charging Current:\u003c\/b\u003e 1000mA (1A)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBattery Over-discharge Protection Voltage:\u003c\/b\u003e 2.5V\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBattery Over-current Protection Current:\u003c\/b\u003e 3A\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBoard Dimensions:\u003c\/b\u003e 2.6 CM x 1.7 CM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eHow to Use:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eConnect Battery:\u003c\/b\u003e Connect the positive terminal of your lithium battery to the \u003ccode\u003eB+\u003c\/code\u003e pad and the negative terminal to the \u003ccode\u003eB-\u003c\/code\u003e pad on the module.\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eImportant Note:\u003c\/b\u003e The first time you connect a battery, there might be no voltage output between \u003ccode\u003eOUT+\u003c\/code\u003e and \u003ccode\u003eOUT-\u003c\/code\u003e. To activate the protection circuit, simply plug in a 5V power source (like a phone charger) into the Type-C USB port. This activation step is also required if the battery is disconnected and reconnected from \u003ccode\u003eB+\u003c\/code\u003e and \u003ccode\u003eB-\u003c\/code\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePower Input:\u003c\/b\u003e Plug a 5V power source (e.g., a mobile phone charger) into the Type-C USB female socket. Alternatively, you can use the adjacent \u003ccode\u003e+\u003c\/code\u003e and \u003ccode\u003e-\u003c\/code\u003e solder pads for 5V input.\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eCharger Requirement:\u003c\/b\u003e Ensure your phone charger or power supply can output 1A or more to guarantee normal charging operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eConnect Load (Optional):\u003c\/b\u003e Connect your load (e.g., a mobile boost converter or other device) to the \u003ccode\u003eOUT+\u003c\/code\u003e and \u003ccode\u003eOUT-\u003c\/code\u003e terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMonitor Charging:\u003c\/b\u003e\n\u003cul\u003e\n\u003cli\u003eA \u003cb\u003ered LED\u003c\/b\u003e will illuminate, indicating that the battery is currently charging.\u003c\/li\u003e\n\u003cli\u003eA \u003cb\u003eblue LED\u003c\/b\u003e will illuminate, indicating that the battery is fully charged.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":35845761433751,"sku":"21PS001469","price":10.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/tp4056-charger-module-front.jpg?v=1753702531"},{"product_id":"4s-16-8v-18650-lithium-battery-capacity-indicator","title":"4S 16.8V 18650 Lithium Battery Capacity Indicator Board","description":"\u003cp\u003e\u003cb\u003e4S 16.8V 18650 Lithium Battery Capacity Indicator Board - Your Essential Battery Management Tool!\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThis brand new, ultra-thin 4-series 16.8V lithium battery capacity display board is designed specifically for 18650 lithium battery packs, offering intuitive and accurate power monitoring. Whether you're using it for power tools, outdoor gear, or DIY power projects, you can easily keep track of your battery's status and avoid unexpected power loss.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKey Features:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eUltra-Thin Design:\u003c\/b\u003e Slim and lightweight, easy to integrate into various devices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIntuitive Display:\u003c\/b\u003e 5 LED indicators provide a clear, at-a-glance view of remaining battery power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWide Compatibility:\u003c\/b\u003e Suitable for lithium battery packs, lead-acid batteries, electric vehicle batteries, and other electric equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReal-time Monitoring:\u003c\/b\u003e Simply press the red button to instantly display the current battery charge level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eUltra-Low Power Consumption:\u003c\/b\u003e After releasing the button, the LEDs turn off after a 3-5 second delay, consuming no power in static mode.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReverse Connection Protection:\u003c\/b\u003e Built-in anti-reverse function prevents damage if positive and negative terminals are connected incorrectly, ensuring safe use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eBattery Compatibility:\u003c\/b\u003e 4-series Lithium Batteries (Li-ion \/ Li-Po), fully charged voltage 16.8V\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDimensions:\u003c\/b\u003e 2.7 x 62 x 15.8 MM\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCable Length:\u003c\/b\u003e 140 MM\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDisplay Type:\u003c\/b\u003e 5 LED indicators\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStatic Power Consumption:\u003c\/b\u003e 0mA (when LEDs are off)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOperating Current:\u003c\/b\u003e Approx. 30mA (when LEDs are on)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003ePower Level Display Parameters (Reference values, with a ±2% error range):\u003c\/b\u003e\u003c\/p\u003e\n\u003cdiv class=\"horizontal-scroll-wrapper\"\u003e\n\u003cdiv class=\"table-block-component\"\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003cdiv class=\"table-block has-export-button\"\u003e\n\u003cdiv class=\"table-content not-end-of-paragraph\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003eLED Indicator\u003c\/td\u003e\n\u003ctd\u003eVoltage Range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eL1\u003c\/td\u003e\n\u003ctd\u003e8V - 10V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eL2\u003c\/td\u003e\n\u003ctd\u003e10V - 13.0V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eL3\u003c\/td\u003e\n\u003ctd\u003e13.0V - 15.0V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eL4\u003c\/td\u003e\n\u003ctd\u003e15.0V - 16.0V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eL5\u003c\/td\u003e\n\u003ctd\u003e16.0V - 16.8V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-footer hide-from-message-actions ng-star-inserted\"\u003e\u003c\/div\u003e\n\u003c!----\u003e\n\u003c\/div\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cb\u003eHow to Use:\u003c\/b\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eConnect the red wire (positive) and black wire (negative) of the display board to the positive and negative terminals of the battery pack you wish to measure.\u003c\/li\u003e\n\u003cli\u003eGently press and hold the red button on the display board with your finger.\u003c\/li\u003e\n\u003cli\u003eThe LED indicators will light up, showing the real-time battery charge status.\u003c\/li\u003e\n\u003cli\u003eUpon releasing your finger, the LED lights will turn off automatically after approximately 3-5 seconds, entering a low power consumption mode.\u003c\/li\u003e\n\u003cli\u003eIf the wires are connected in reverse, the module's reverse connection protection will prevent damage; simply correct the wiring.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eThis capacity indicator board is an indispensable accessory for your battery management, providing reliable power level alerts!\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":35845956829335,"sku":"","price":20.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/4s-16-8v-18650-lithium-battery-indicator-closeup.jpg?v=1753771040"},{"product_id":"4-channel-usb-qc3-0-buck-converter-charging-step-down-module","title":"4 Channel USB Qc3.0 Buck Converter Charging Step Down Module","description":"\u003ch1\u003e\u003cspan lang=\"EN-US\" style=\"font-family: 'Arial','sans-serif'; color: #111111; font-weight: normal;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'Arial','sans-serif'; color: #111111; font-weight: normal;\"\u003e4 Channel USB Qc3.0 Qc2.0 Dc-Dc Buck Converter Charging Step Down Module 6-32V 9V 12V 24V to Fast Quick Charger Circuit Board 3V 5V 12V\u003c\/span\u003e\u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eInput voltage range: 6V-32V\u003cbr\u003e Output voltage: default 5V, automatically adjust between 3-12V after triggering fast charge\u003cbr\u003e Output power: up to 24W (4V\/3.6A, 5V\/3.4A, 9V\/2.5A, 12V\/2A, etc.)\u003cbr\u003e Output voltage cable compensation function\u003cbr\u003e Conversion efficiency: 90%-97%\u003cbr\u003e Support multiple fast charging protocols\u003cbr\u003e Support DCP protocol, BC1.2, , protocol\u003cbr\u003e Support Fast Charge Protocol FCP\/SCP\u003cbr\u003e Support Fast Charge Protocol AFC\u003cbr\u003e Support Spreadtrum Fast Charge Protocol SFCP\u003cbr\u003e Support Qualcomm QC2.0 and 3.0\u003cbr\u003e Support MTK PE1.1\/PE2.0\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e Colour:black\u003cbr\u003e Material:Metal + plastic\u003cbr\u003e Size:90*45mm\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cbr\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":37774340849815,"sku":"","price":69.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/61uWTg0OQ3L._SL1500.jpg?v=1753630701"},{"product_id":"2-x-1-5v-aa-battery-holder-case","title":"AA Battery Holder with Switch \u0026 Leads – 2\/3\/4\/8 Slot Options","description":"\u003cp data-start=\"186\" data-end=\"522\"\u003e\u003cstrong data-start=\"186\" data-end=\"198\"\u003eOverview\u003c\/strong\u003e\u003cbr data-start=\"198\" data-end=\"201\"\u003eThis AA Battery Holder with built-in ON\/OFF switch and leads is perfect for powering DIY electronics, hobby projects, and prototypes. Available in 2-slot, 3-slot, 4-slot, and 8-slot versions, each holder includes a built-in switch for convenient power control, and pre-attached red and black wires for quick connection.\u003c\/p\u003e\n\u003cp data-start=\"524\" data-end=\"538\"\u003e\u003cstrong data-start=\"524\" data-end=\"536\"\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"541\" data-end=\"628\"\u003e\n\u003cstrong data-start=\"541\" data-end=\"560\"\u003eBuilt-in Switch\u003c\/strong\u003e – Easily turn your circuit on or off without disconnecting wires.\u003c\/li\u003e\n\u003cli data-start=\"631\" data-end=\"700\"\u003e\n\u003cstrong data-start=\"631\" data-end=\"649\"\u003eMultiple Sizes\u003c\/strong\u003e – Choose from 2, 3, 4, or 8 AA battery capacity.\u003c\/li\u003e\n\u003cli data-start=\"703\" data-end=\"779\"\u003e\n\u003cstrong data-start=\"703\" data-end=\"725\"\u003ePre-soldered Leads\u003c\/strong\u003e – 13cm red (+) and black (–) wires for easy wiring.\u003c\/li\u003e\n\u003cli data-start=\"782\" data-end=\"848\"\u003e\n\u003cstrong data-start=\"782\" data-end=\"800\"\u003eDurable Design\u003c\/strong\u003e – Sturdy plastic case keeps batteries secure.\u003c\/li\u003e\n\u003cli data-start=\"851\" data-end=\"946\"\u003e\n\u003cstrong data-start=\"851\" data-end=\"866\"\u003eEasy to Use\u003c\/strong\u003e – Ideal for breadboard experiments, Arduino projects, LED lighting, and more.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"948\" data-end=\"968\"\u003e\u003cstrong data-start=\"948\" data-end=\"966\"\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"971\" data-end=\"1002\"\u003e\n\u003cstrong data-start=\"971\" data-end=\"987\"\u003eWire Length:\u003c\/strong\u003e approx. 13cm\u003c\/li\u003e\n\u003cli data-start=\"1005\" data-end=\"1022\"\u003e\n\u003cstrong data-start=\"1005\" data-end=\"1020\"\u003eDimensions:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli data-start=\"1027\" data-end=\"1052\"\u003e2-slot: ~68 × 33 × 18mm\u003c\/li\u003e\n\u003cli data-start=\"1057\" data-end=\"1082\"\u003e3-slot: ~68 × 49 × 18mm\u003c\/li\u003e\n\u003cli data-start=\"1087\" data-end=\"1112\"\u003e4-slot: ~69 × 65 × 19mm\u003c\/li\u003e\n\u003cli data-start=\"1117\" data-end=\"1143\"\u003e8-slot: ~70 × 126 × 19mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1146\" data-end=\"1183\"\u003e\n\u003cstrong data-start=\"1146\" data-end=\"1163\"\u003eBattery Type:\u003c\/strong\u003e AA (not included)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1185\" data-end=\"1337\"\u003e\u003cstrong data-start=\"1185\" data-end=\"1201\"\u003eApplications\u003c\/strong\u003e\u003cbr data-start=\"1201\" data-end=\"1204\"\u003ePerfect for robotics, toys, small gadgets, LED strips, Arduino \u0026amp; Raspberry Pi projects, and other low-voltage portable electronics.\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"2 slot","offer_id":46055142228119,"sku":null,"price":5.0,"currency_code":"HKD","in_stock":true},{"title":"3 slot","offer_id":46055142260887,"sku":null,"price":6.0,"currency_code":"HKD","in_stock":true},{"title":"4 slot","offer_id":46055142293655,"sku":null,"price":8.0,"currency_code":"HKD","in_stock":true},{"title":"8 slot","offer_id":46055142326423,"sku":null,"price":20.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/aa-battery-holders-multiple-sizes.jpg?v=1755239936"},{"product_id":"dc-power-extension-cable","title":"18AWG DC Power Extension Cable - 5.5x2.1mm Male\/Female Cord","description":"\u003cp\u003e\u003cb\u003eEffortlessly Extend Your Power Reach\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eNever be limited by cable length again. Our 18AWG DC Power Extension Cable is the perfect solution for extending the reach of your 12V devices, providing the flexibility you need for a clean and efficient setup. Ideal for home security systems, office electronics, and creative lighting projects.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKey Features:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eHigh-Quality Construction:\u003c\/b\u003e Made with a pure copper core, this cable ensures lower resistivity and superior electrical conductivity compared to standard cables. This means a more stable and reliable power supply for your devices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurable \u0026amp; Safe:\u003c\/b\u003e The robust 18AWG wire gauge is recommended for a maximum load of up to 10 amps, providing a safe and durable connection. The tough PVC plastic jacket protects the cable from wear and tear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWide Compatibility:\u003c\/b\u003e The universal 5.5mm x 2.1mm male-to-female connector is compatible with a wide range of low-voltage DC equipment. Perfect for:\n\u003cul\u003e\n\u003cli\u003eCCTV Security Cameras \u0026amp; IP Cameras\u003c\/li\u003e\n\u003cli\u003eDVR\/NVR Systems\u003c\/li\u003e\n\u003cli\u003eLED Light Strips \u0026amp; String Lights\u003c\/li\u003e\n\u003cli\u003eRouters \u0026amp; Modems\u003c\/li\u003e\n\u003cli\u003ePrinters \u0026amp; Audio Equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eImportant:\u003c\/b\u003e This is a 2.1mm center positive power connection. Please verify your device's power plug size is \u003cb\u003e5.5mm (outer diameter) x 2.1mm (inner diameter)\u003c\/b\u003e before purchasing to ensure compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eConnector Size:\u003c\/b\u003e 5.5mm (Outer Diameter) x 2.1mm (Inner Diameter)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWire Gauge:\u003c\/b\u003e 18 AWG\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMax Load:\u003c\/b\u003e 10 Amps or less (Recommended)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial:\u003c\/b\u003e Pure Copper Core, PVC Plastic Jacket\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAvailable Lengths:\u003c\/b\u003e 1m, 3m, 5m, 10m\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003ePackage Includes:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1 x DC Power Extension Cable in your selected length\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"1 meter","offer_id":39541561819287,"sku":"","price":12.0,"currency_code":"HKD","in_stock":true},{"title":"3 meter","offer_id":39541561852055,"sku":"","price":25.0,"currency_code":"HKD","in_stock":true},{"title":"5 meter","offer_id":39541561884823,"sku":"","price":35.0,"currency_code":"HKD","in_stock":true},{"title":"10 meter","offer_id":39541561917591,"sku":"","price":55.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/dc-power-extension-cable-male-female.jpg?v=1753716005"},{"product_id":"panasonic-hyper-manganese-battery-aa-4pcs","title":"Panasonic Hyper Manganese Battery (AA) - 4pcs","description":"\u003cp\u003eExperience reliable power with the Panasonic Hyper Manganese Batteries. This pack includes 4 AA batteries designed for high-performance devices. Perfect for toys, remote controls, and more, these batteries ensure long-lasting energy and consistent performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e4pcs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Energy Output:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIdeal for high-drain devices\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeak-Proof Design:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEnsures safety and longevity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrusted Brand:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePanasonic quality you can rely on\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eUsage:\u003c\/strong\u003e Perfect for everyday household items, electronics, and gadgets. Keep your devices running smoothly with Panasonic's trusted battery technology.\u003c\/p\u003e\n\u003cp\u003ePower up your devices today! Order your Panasonic Hyper Manganese Battery pack now and enjoy dependable performance when you need it most.\u003c\/p\u003e","brand":"Pansonic","offers":[{"title":"Default Title","offer_id":39628187926679,"sku":"","price":5.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/Panasonic-Hyper-Manganese-AA-batteries-Front.jpg?v=1756178179"},{"product_id":"5pcs-lot-1-5a-5v-three-terminal-tegulator-l7805cv","title":"5pcs L7805CV 7805 5V 1.5A Linear Voltage Regulator for Arduino","description":"\u003ch4 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0\"\u003eOverview\u003c\/h4\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eThis pack includes 5 pieces of L7805CV \/ 7805 positive linear voltage regulators in a TO‑220 package, each providing a fixed 5V output up to 1.5A. The regulators are widely used to power Arduino boards, sensors and other 5V logic circuits from higher DC input voltages.\u003cspan class=\"inline-flex\" data-state=\"closed\"\u003e\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" rel=\"nofollow noopener\"\u003e\u003ca rel=\"noopener\" class=\"inline\" href=\"https:\/\/docs.cirkitdesigner.com\/component\/1e489b6c-0e9c-4f1b-98f8-b8590afb7732\/7805\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eKey features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eFixed +5V output, up to 1.5A continuous load current (peak around 2.2A with proper heatsinking).\u003cspan class=\"inline-flex\" data-state=\"closed\"\u003e\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" rel=\"nofollow noopener\"\u003e\u003ca rel=\"noopener\" class=\"inline\" href=\"https:\/\/www.addicore.com\/products\/5v-voltage-regulator-1-5a-l7805cv\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eWide input voltage range, typically 7–25V DC for stable regulation.\u003cspan class=\"inline-flex\" data-state=\"closed\"\u003e\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" rel=\"nofollow noopener\"\u003e\u003ca rel=\"noopener\" class=\"inline\" href=\"https:\/\/www.electronicsforu.com\/technology-trends\/learn-electronics\/7805-ic-voltage-regulator\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eTO‑220 through‑hole package with 2.54mm lead spacing, easy for breadboard or PCB prototyping.\u003cspan class=\"inline-flex\" data-state=\"closed\"\u003e\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" rel=\"nofollow noopener\"\u003e\u003ca rel=\"noopener\" class=\"inline\" href=\"https:\/\/www.diyelectronics.co.za\/store\/linear\/2699-l7805cv-linear-voltage-regulator-5v-fixed-output.html\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eBuilt‑in thermal shutdown and short‑circuit current limiting for safer projects.\u003cspan class=\"inline-flex\" data-state=\"closed\"\u003e\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" rel=\"nofollow noopener\"\u003e\u003ca rel=\"noopener\" class=\"inline\" href=\"https:\/\/www.addicore.com\/products\/5v-voltage-regulator-1-5a-l7805cv\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eCommonly used in DIY 5V power supplies, Arduino projects, servo and sensor power rails.\u003cspan class=\"inline-flex\" data-state=\"closed\"\u003e\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" rel=\"nofollow noopener\"\u003e\u003ca rel=\"noopener\" class=\"inline\" href=\"https:\/\/easyelectronicsproject.com\/mini-projects\/5v-power-supply-circuit-7805\/\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003ePin configuration\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(front view, pins downward)\u003c\/p\u003e\n\u003col\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\n\u003cstrong\u003eInput\u003c\/strong\u003e: Connect 7–25V DC.\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\n\u003cstrong\u003eGround\u003c\/strong\u003e: Common ground with your circuit.\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\n\u003cstrong\u003eOutput\u003c\/strong\u003e: Regulated +5V DC.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch4 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0\"\u003eTypical applications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e5V power supply module for Arduino Uno, Nano and other 5V microcontroller boards.\u003cspan class=\"inline-flex\" aria-label=\"Learning Arduino for beginners EP#19 how to power your Arduino with a 7805 voltage regulator\" data-state=\"closed\"\u003e\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" rel=\"nofollow noopener\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"inline-flex\" aria-label=\"How to Use 7805: Examples, Pinouts, and Specs\" data-state=\"closed\"\u003e\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" rel=\"nofollow noopener\"\u003e\u003ca rel=\"noopener\" class=\"inline\" href=\"https:\/\/docs.cirkitdesigner.com\/component\/1e489b6c-0e9c-4f1b-98f8-b8590afb7732\/7805\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eRegulated 5V rail for sensors, small DC motors or servos (with appropriate decoupling capacitors and heatsink).\u003cspan class=\"inline-flex\" data-state=\"closed\"\u003e\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" rel=\"nofollow noopener\"\u003e\u003ca rel=\"noopener\" class=\"inline\" href=\"https:\/\/forum.arduino.cc\/t\/powering-a-servo-through-a-7805-regulator\/486667\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eGeneral 5V bench supply or adapter converter from 9V\/12V DC sources for breadboard experiments.\u003cspan class=\"inline-flex\" data-state=\"closed\"\u003e\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" rel=\"nofollow noopener\"\u003e\u003ca rel=\"noopener\" class=\"inline\" href=\"https:\/\/www.pcbway.com\/project\/shareproject\/Simple_7805_based_5V_regulator_for_Arduino_projects.html\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":39966333763735,"sku":"21PS000721","price":25.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/l7805cv-5v-1-5a-regulator-5pcs-front.png?v=1775466617"},{"product_id":"9v-battery-snap-connector-to-crocodile-clip","title":"9V Battery Snap Connector to Crocodile Clip Cable - 15cm","description":"\u003ch2 dir=\"auto\"\u003e\u003cstrong\u003eConnect with Ease Using the 9V Battery Snap Connector to Crocodile Clip Cable!\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"auto\"\u003eThis 9V battery snap connector to crocodile clip cable is designed for seamless and reliable connections. With a compact body and a 15cm (5.9 inches) cable length, it’s easy to use and perfect for various applications, such as DIY electronics projects, testing circuits, or powering devices with a 9V battery.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable Length\u003c\/strong\u003e: 15cm (5.9 inches) for flexible use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Alligator Clips\u003c\/strong\u003e: Securely connects to 9V battery terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Design\u003c\/strong\u003e: Small body for easy handling and connection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Use\u003c\/strong\u003e: Ideal for DIY projects, circuit testing, and more.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eTechnical Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type\u003c\/strong\u003e: 9V battery snap to dual crocodile clips.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 15cm (5.9 inches).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003eEnhance your electronics toolkit with this reliable and easy-to-use battery snap connector cable!\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":40245471543447,"sku":"","price":6.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/9-battery-snap-connector-crocodile-clip-main.jpg?v=1776952688"},{"product_id":"9v-battery-holder-with-switch","title":"9V Battery Holder Box with Cover and ON\/OFF Switch","description":"\u003cp\u003e\u003cb\u003ePower Your DIY Electronics Projects with Ease and Precision\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eGive your project a clean, reliable, and self-contained power source with our 9V Battery Holder Box. Designed for hobbyists and professionals alike, this compact case is the perfect solution for powering everything from Arduino boards and LED strips to custom robotics and portable devices.\u003c\/p\u003e\n\u003cp\u003eThe integrated ON\/OFF switch eliminates the need for extra wiring or separate components, allowing you to control your circuit directly from the source. A secure, sliding cover protects the battery from dust and accidental impact while ensuring a stable connection and a professional, tidy finish for your creation.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKey Features:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIntegrated ON\/OFF Switch:\u003c\/b\u003e Conveniently control power to your project without disconnecting wires.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eProtective Cover:\u003c\/b\u003e The slide-on lid keeps your 9V battery securely in place and protected.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReady to Use:\u003c\/b\u003e Comes with pre-tinned 13cm red (positive) and black (negative) wire leads for easy connection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurable \u0026amp; Compact:\u003c\/b\u003e Made from sturdy black plastic, its small footprint (6.6 x 3.2 x 2cm) allows for easy integration into most projects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eClean Installation:\u003c\/b\u003e Encases the battery for a professional and tidy appearance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003ePerfect For:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eArduino, Raspberry Pi, and other microcontrollers\u003c\/li\u003e\n\u003cli\u003eCustom LED lighting projects\u003c\/li\u003e\n\u003cli\u003eScientific experiments and educational models\u003c\/li\u003e\n\u003cli\u003eDIY toys and robotics\u003c\/li\u003e\n\u003cli\u003eAny portable electronics requiring a 9V power source\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eBattery Compatibility:\u003c\/b\u003e Standard 9V (PP3 type)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial:\u003c\/b\u003e Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eColor:\u003c\/b\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDimensions (L\u003ci\u003eW\u003c\/i\u003eH):\u003c\/b\u003e 6.6 cm x 3.2 cm x 2 cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWire Length:\u003c\/b\u003e Approximately 13 cm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eWhat's Included:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1 x 9V Battery Holder with ON\/OFF Switch and Cover (Battery not included)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003e \u003c\/h1\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":40258863300759,"sku":"","price":8.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/9v-battery-box-with-power-leads.jpg?v=1755600955"},{"product_id":"zmpt101b-ac-voltage-sensor-mutual-module","title":"ZMPT101B AC Voltage Sensor Module for Arduino (0-250V AC)","description":"\u003cp\u003e\u003cb\u003eOverview:\u003c\/b\u003e Accurately monitor AC voltage in your projects with the ZMPT101B AC Voltage Sensor Module. This active single-phase voltage transformer module provides a precise sine wave output, making it ideal for AC power signal acquisition up to 250V. Perfect for Arduino, ESP32, Raspberry Pi, and other microcontroller-based systems.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKey Features:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eHigh Precision:\u003c\/b\u003e Equipped with a ZMPT101B series micro voltage transformer for accurate voltage sensing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOptimized Output:\u003c\/b\u003e Features a high-precision onboard operational amplifier circuit for exact signal sampling, compensation, and adjustable output modes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWide Measurement Range:\u003c\/b\u003e Capable of measuring AC voltages up to 250V.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSine Wave Output:\u003c\/b\u003e Provides a clear sine wave signal output with a DC component (median).\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFlexible Power Supply:\u003c\/b\u003e Operates with a supply voltage range of 5V to 30V DC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEasy Integration:\u003c\/b\u003e Designed for seamless use with popular development boards like Arduino Mega, making AC voltage monitoring straightforward.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eTechnical Specifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eVoltage Transformer:\u003c\/b\u003e ZMPT101B Precision Micro Voltage Transformer\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMeasurement Range:\u003c\/b\u003e 0-250V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOutput Signal:\u003c\/b\u003e Sine Wave (with DC median)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSupply Voltage:\u003c\/b\u003e 5V - 30V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eApplication:\u003c\/b\u003e AC Power Signal Acquisition, Voltage Monitoring, DIY Electronics\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eWhy Choose the ZMPT101B?\u003c\/b\u003e Whether you're building a smart home energy monitor, a power supply tester, or any project requiring reliable AC voltage measurement, the ZMPT101B module offers the accuracy and ease of use you need. Its robust design and high-precision components ensure dependable performance for your electronic designs.\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":41411853844631,"sku":"21PS001775","price":25.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/zmpt101b-voltage-sensor-module-angled-overall.jpg?v=1753717257"},{"product_id":"voltage-sensor-module","title":"DC 0-25V Voltage Sensor Module (Resistive Divider) for Arduino","description":"\u003ch4 data-path-to-node=\"25\"\u003e🔋 \u003cb\u003e[DC 0-25V High-Precision Voltage Sensor Module]\u003c\/b\u003e\n\u003c\/h4\u003e\n\u003cp data-path-to-node=\"26\"\u003eThis voltage detection module is designed based on the \u003cb\u003eresistive divider principle\u003c\/b\u003e, which safely scales down an input voltage of up to 25V by a factor of 5. This allows the high voltage to be safely read by the analog input pin of microcontrollers like the Arduino. It is an ideal component for battery level monitoring, power projects, and general electronic experimentation.\u003c\/p\u003e\n\u003ch4 data-path-to-node=\"27\"\u003e✨ \u003cb\u003eKey Features\u003c\/b\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"28,0,0\"\u003e\n\u003cb\u003eDivider Design:\u003c\/b\u003e Utilizes a resistive voltage divider circuit to reduce the input voltage by a \u003cb\u003e5:1\u003c\/b\u003e ratio.\u003c\/li\u003e\n\u003cli data-path-to-node=\"28,1,0\"\u003e\n\u003cb\u003eWide Voltage Range:\u003c\/b\u003e Supports a DC voltage input range from \u003cb\u003e0V to 25V\u003c\/b\u003e.\u003c\/li\u003e\n\u003cli data-path-to-node=\"28,2,0\"\u003e\n\u003cb\u003eHigh Resolution:\u003c\/b\u003e Analog resolution of \u003cb\u003e0.00489V\u003c\/b\u003e (based on a 5V system).\u003c\/li\u003e\n\u003cli data-path-to-node=\"28,3,0\"\u003e\n\u003cb\u003eMCU Compatible:\u003c\/b\u003e Works with both 5V and 3.3V microcontroller systems (check maximum input voltage limits accordingly).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-path-to-node=\"29\"\u003e📋 \u003cb\u003eTechnical Specifications (Parameters)\u003c\/b\u003e\n\u003c\/h4\u003e\n\u003ctable data-path-to-node=\"30\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eValue\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eNote\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"30,1,0,0\"\u003e\u003cb\u003eVoltage Input Range\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"30,1,1,0\"\u003eDC 0V - 25V\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"30,1,2,0\"\u003eRefer to the next point for the minimum detectable voltage.\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"30,2,0,0\"\u003e\u003cb\u003eVoltage Detection Range\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"30,2,1,0\"\u003eDC 0.02445V - 25V\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"30,2,2,0\"\u003eMinimum detectable input voltage is approximately 0.02445V.\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"30,3,0,0\"\u003e\u003cb\u003eVoltage Analog Resolution\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"30,3,1,0\"\u003e0.00489V\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"30,3,2,0\"\u003eBased on a 5V system (5V \/ 1023).\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"30,4,0,0\"\u003e\u003cb\u003eVoltage Division Ratio\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"30,4,1,0\"\u003e5:1\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4 data-path-to-node=\"31\"\u003e\u003c\/h4\u003e\n\u003ch4 data-path-to-node=\"31\"\u003e🔌 \u003cb\u003eWiring Guide\u003c\/b\u003e\n\u003c\/h4\u003e\n\u003ctable data-path-to-node=\"32\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInterface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eConnection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"32,1,0,0\"\u003e\u003cb\u003eDC Input (External Power)\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"32,1,1,0\"\u003ePositive to VCC, Negative to GND\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"32,1,2,0\"\u003eConnects to the DC voltage source (0-25V) you wish to measure.\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"32,2,0,0\"\u003e\u003cb\u003eOutput Interface (MCU)\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"32,2,1,0\"\u003e\"+\" to 5V\/3.3V (Power)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"32,2,2,0\"\u003eConnects to the VCC\/power supply pin of your Arduino\/MCU.\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"32,3,0,0\"\u003e\u003cb\u003eOutput Interface (MCU)\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"32,3,1,0\"\u003e\"-\" to GND (Ground)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"32,3,2,0\"\u003eConnects to the common ground of your Arduino\/MCU.\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"32,4,0,0\"\u003e\u003cb\u003eOutput Interface (MCU)\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"32,4,1,0\"\u003e\"S\" to Arduino AD Pin\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"32,4,2,0\"\u003eConnects to an Analog Input Pin of the Arduino (e.g., A0, A1).\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":41617058431127,"sku":"21TS001391","price":10.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/dc-0.02-25v-voltage-sensor-module-arduino.jpg?v=1765008642"},{"product_id":"dc-to-dc-buck-step-down-module","title":"LM2596 DC-DC Adjustable Step-Down Module with LED Voltmeter (3A)","description":"\u003ch2 data-path-to-node=\"7\"\u003e\u003cb data-path-to-node=\"7\" data-index-in-node=\"0\"\u003eReliable Power Conversion for Every Project\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp data-path-to-node=\"8\"\u003eFluctuating voltage is the enemy of sensitive electronics. Whether you are building a custom robotic arm, prototyping a new circuit, or modifying your vehicle's power supply, delivering the exact voltage required is critical. The LM2596 DC-DC Buck Converter is designed to solve exactly this problem, offering a robust and highly stable power supply solution. Sourced with the rigorous standards of Sun Cheong Computer Co. Ltd.'s 20+ years of hardware expertise, you can trust this component to keep your devices running safely.\u003c\/p\u003e\n\u003cp data-path-to-node=\"8\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"9\"\u003e\u003cb data-path-to-node=\"9\" data-index-in-node=\"0\"\u003eReal-Time Voltage Monitoring at a Glance\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"10\"\u003eForget the hassle of constantly probing your circuit with an external multimeter. This module features a built-in, bright LED voltmeter that displays your voltage in real-time. This allows for rapid, on-the-fly adjustments during testing and ensures your connected components are receiving the precise power they need to function optimally.\u003c\/p\u003e\n\u003cp data-path-to-node=\"10\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"11\"\u003e\u003cb data-path-to-node=\"11\" data-index-in-node=\"0\"\u003eVersatile and Built to Last\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"12\"\u003eDesigned on a high-quality FR4 PCB, this step-down module is built to withstand rigorous use in both hobbyist workshops and industrial environments. It efficiently handles up to 3A of output current with a maximum conversion efficiency of 90%, minimizing heat generation and maximizing performance. It seamlessly handles common conversions like 24V to 12V, 12V to 5V, or 12V to 3.3V, making it an indispensable tool in any engineer's kit.\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":41668152983703,"sku":"21PA000482","price":35.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/lm2596-step-down-module-front-view.jpg?v=1775706560"},{"product_id":"voltage-to-pwm-module-0-10v","title":"Voltage to PWM Converter Module | 0-10V to 0-100% PWM (50kHz)","description":"\u003ch2 data-path-to-node=\"4\"\u003eEffortless Analog to Digital Signal Conversion\u003c\/h2\u003e\n\u003cp data-path-to-node=\"5\"\u003eWorking with mixed-signal electronics often presents a common bottleneck: making analog sensors communicate smoothly with digital microcontrollers or industrial PLCs. This \u003cb data-path-to-node=\"5\" data-index-in-node=\"172\"\u003eVoltage to PWM Converter Module\u003c\/b\u003e acts as the perfect translator for your circuits, taking a variable analog DC voltage and converting it into a clean, stable Pulse Width Modulation (PWM) digital signal.\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\"\u003eWhether you are designing a custom motor control system, integrating industrial sensors, or building complex automated workflows, this module ensures your signal integrity remains intact from input to output.\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"7\"\u003ePrecision Control for Your Electronic Projects\u003c\/h3\u003e\n\u003cp data-path-to-node=\"8\"\u003eAccuracy is non-negotiable when dealing with signal conversion. With a highly responsive conversion rate from 0% to 100% duty cycle, this board translates your analog voltage adjustments into immediate digital responses.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"9,0,0\"\u003e\n\u003cb data-path-to-node=\"9,0,0\" data-index-in-node=\"0\"\u003eSelectable Input Ranges:\u003c\/b\u003e By utilizing the onboard jumper pins, you can easily select between 0-5V and 0-10V input ranges. This dual-compatibility ensures the module works seamlessly with a wide variety of industrial sensors and standard logic level outputs.\u003c\/li\u003e\n\u003cli data-path-to-node=\"9,1,0\"\u003e\n\u003cb data-path-to-node=\"9,1,0\" data-index-in-node=\"0\"\u003eOnboard Calibration:\u003c\/b\u003e Component tolerances can sometimes throw off precise readings. That is why this module features a built-in trimming potentiometer, allowing you to manually calibrate the accuracy and fine-tune the duty cycle matching to your specific application's requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"10\"\u003eDesigned for Reliability and Easy Integration\u003c\/h3\u003e\n\u003cp data-path-to-node=\"11\"\u003eEngineered for rapid prototyping and permanent installations alike, the compact PCB features secure screw terminal blocks for solid, vibration-resistant connections. Operating on a flexible DC 5V-12V power supply, it easily shares power with most standard logic boards, Arduino setups, or Raspberry Pi environments. Simply connect your power, apply your control voltage to the VIN terminal, and retrieve your 5V amplitude PWM signal ready for your logic circuits.\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":42048491356311,"sku":"21PS001954","price":25.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/voltage-to-pwm-converter-module-top-view.jpg?v=1775285461"},{"product_id":"pwm-to-voltage-module-0-10v","title":"PWM to 0-10V Voltage Converter Module | Digital to Analog for PLC \u0026 MCU","description":"\u003ch2 data-path-to-node=\"4\"\u003e\u003cb data-path-to-node=\"4\" data-index-in-node=\"0\"\u003eBridge Digital and Analog Systems with Ease\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp data-path-to-node=\"4\"\u003eIntegrating modern microcontrollers with legacy industrial equipment can be a frustrating bottleneck. The \u003cb data-path-to-node=\"4\" data-index-in-node=\"150\"\u003eLC-LM358-PWM2V Module\u003c\/b\u003e solves this by providing a direct, reliable bridge. By converting digital PWM signals into smooth, readable 0-10V analog voltage, you can effortlessly control inverters, motors, and lighting systems without rewriting complex logic.\u003c\/p\u003e\n\u003cp data-path-to-node=\"4\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"5\"\u003e\u003cb data-path-to-node=\"5\" data-index-in-node=\"0\"\u003ePrecision Control at Your Fingertips\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"5\"\u003eAccuracy matters in industrial automation and DIY electronics. This module features a \u003cb data-path-to-node=\"5\" data-index-in-node=\"123\"\u003ebuilt-in calibration potentiometer\u003c\/b\u003e, allowing you to fine-tune the output voltage to match your exact duty cycle requirements. Whether you are running a 5V MCU setup or a 24V industrial PLC, the onboard short-circuit jumper lets you select the perfect input level range instantly.\u003c\/p\u003e\n\u003cp data-path-to-node=\"5\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"6\"\u003e\u003cb data-path-to-node=\"6\" data-index-in-node=\"0\"\u003eCompact, MCU-Embedded Reliability\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"6\"\u003eSpace is often limited in control panels and custom project enclosures. Engineered with \u003cb data-path-to-node=\"6\" data-index-in-node=\"122\"\u003eMCU embedded technology\u003c\/b\u003e, this module delivers high-performance conversion in a highly compact footprint. It is built for sustained operation, ensuring a stable signal translation that keeps your hardware running smoothly and safely.\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":42048577831063,"sku":"","price":25.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/pwm-to-voltage-converter-module-top-view.jpg?v=1775988288"},{"product_id":"1-8s-lipo-battery-voltage-tester","title":"1-8S Lipo Battery Voltage Tester \u0026 Low Voltage Buzzer Alarm","description":"\u003ch2 data-path-to-node=\"4\"\u003ePrevent Battery Damage with Instant Voltage Tracking\u003c\/h2\u003e\n\u003cp data-path-to-node=\"5\"\u003eLithium polymer (Lipo) batteries are powerful but notoriously sensitive. Dropping below a safe voltage threshold can cause irreversible damage, swelling, or even fire hazards. This \u003cb data-path-to-node=\"5\" data-index-in-node=\"181\"\u003e1-8S Lipo Battery Voltage Tester\u003c\/b\u003e is your first line of defense. By plugging your battery's balance lead directly into the pins, the bright LED display instantly cycles through individual cell voltages and the total pack voltage.\u003c\/p\u003e\n\u003cp data-path-to-node=\"5\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"6\"\u003eThe Ultimate Guard Against Over-Discharge\u003c\/h3\u003e\n\u003cp data-path-to-node=\"7\"\u003eYou don't just need to know your battery's status; you need to be warned before it's too late. This device features a highly audible \u003cb data-path-to-node=\"7\" data-index-in-node=\"133\"\u003eLow Voltage Buzzer Alarm\u003c\/b\u003e designed to cut through ambient noise. Whether your drone is hovering in the distance or your custom STEM project is running continuously on the workbench, the dual buzzers and flashing red LED will ensure you never miss a critical voltage drop.\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"8\"\u003eCustomizable Alarms for Every Project\u003c\/h3\u003e\n\u003cp data-path-to-node=\"9\"\u003eDifferent applications require different safety margins. The onboard push button allows you to easily customize the alarm threshold between \u003cb data-path-to-node=\"9\" data-index-in-node=\"140\"\u003e2.7V and 3.8V\u003c\/b\u003e per cell, or turn it completely off. The device automatically saves your preference for the next use. It is fully compatible with Lipo, Li-ion, LiMn, and Li-Fe battery chemistries, making it a versatile staple for DIY hobbyists, professional electronics technicians, and institutional labs.\u003c\/p\u003e\n\u003cp data-path-to-node=\"9\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"10\"\u003eReliable Local Technical Support\u003c\/h3\u003e\n\u003cp data-path-to-node=\"11\"\u003eProcurement is easier when you have reliable partners. We understand the stringent requirements of both casual makers and enterprise clients. This tester is built for consistent accuracy and rugged daily use, fully supported by our comprehensive O2O shopping experience—buy online or pick up directly at our Sham Shui Po storefront.\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":42110290919575,"sku":"21PS001817","price":25.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/1-8s-lipo-battery-tester-front-display.jpg?v=1777557629"},{"product_id":"usb-to-4-2v-8-4v-12-6v-charging-cable","title":"USB to DC Charger Cable for 18650 Lithium Battery (4.2V\/8.4V\/12.6V)","description":"\u003cp\u003eEffortlessly charge your custom 18650 lithium battery packs from any standard USB port. This smart charging cable takes a 5V USB input and converts it to the correct voltage for your battery pack, making it a perfect solution for your DIY projects, portable devices, and custom electronics.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKey Features:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eConvenient USB Charging:\u003c\/b\u003e Power up your lithium batteries from a USB wall adapter, power bank, or computer. No need for bulky, dedicated chargers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMultiple Voltage Options:\u003c\/b\u003e Choose the correct voltage for your battery configuration:\u003c\/li\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e4.2V:\u003c\/b\u003e For single-cell (1S) lithium battery packs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e8.4V:\u003c\/b\u003e For two-cell (2S) lithium battery packs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e12.6V:\u003c\/b\u003e For three-cell (3S) lithium battery packs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSmart Charging Indicator:\u003c\/b\u003e An integrated LED shows the charging status at a glance. The light is red while charging and turns green when the battery is fully charged.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWide Compatibility:\u003c\/b\u003e The output features a standard 5.5x2.5mm DC barrel plug, which is also compatible with the common 5.5x2.1mm size.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eHow to Use:\u003c\/b\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eConnect the USB-A end to a 5V USB power source (2A recommended for best performance).\u003c\/li\u003e\n\u003cli\u003eSelect the cable with the correct output voltage for your battery pack.\u003c\/li\u003e\n\u003cli\u003ePlug the DC barrel connector into your battery pack's charging port.\u003c\/li\u003e\n\u003cli\u003eThe red light indicates charging is in progress. The light will turn green when charging is complete.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eInput:\u003c\/b\u003e USB 5V \/ 2A\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOutput Voltage:\u003c\/b\u003e DC 4.2V, 8.4V, or 12.6V (select option at purchase)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaximum Output Current:\u003c\/b\u003e 1A\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eInput Connector:\u003c\/b\u003e Standard USB 2.0 Type-A Male\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOutput Connector:\u003c\/b\u003e DC Barrel Plug 5.5mm x 2.5mm (also fits 5.5mm x 2.1mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePolarity:\u003c\/b\u003e Center Positive (+) \/ Outer Negative (-)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCable Length:\u003c\/b\u003e Approx. 100cm (1 meter)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eColor:\u003c\/b\u003e Black\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003ePackage Includes:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1 x USB to DC Charging Cable (in your chosen voltage)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003ePlease Note:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTo ensure stable performance, please use a USB power source with a 2A output.\u003c\/li\u003e\n\u003cli\u003eIt is crucial to select the correct voltage for your battery pack. Using the wrong voltage can damage your batteries.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"4.2v","offer_id":42113028685975,"sku":"","price":25.0,"currency_code":"HKD","in_stock":true},{"title":"8.4v","offer_id":42113028718743,"sku":"","price":25.0,"currency_code":"HKD","in_stock":true},{"title":"12.6v","offer_id":42113028751511,"sku":"","price":25.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/usb-dc-charger-cable-4-2v-18650.jpg?v=1777557347"},{"product_id":"solar-power-management-module-for-6v-24v-solar-panel","title":"MPPT Solar Power Management Module (6V-24V) - 3.7V Li-ion Charger","description":"\u003ch4 data-path-to-node=\"5\"\u003e\u003cb\u003e🌟 Product Overview \u0026amp; Key Features\u003c\/b\u003e\u003c\/h4\u003e\n\u003cp data-path-to-node=\"6\"\u003eThis \u003cb\u003eMPPT Solar Power Management Module\u003c\/b\u003e is the ideal solution for powering your solar, low-power IoT, and green energy projects. Designed for 6V to 24V solar panels, it efficiently charges a 3.7V rechargeable Lithium battery while providing a stable 5V\/1A regulated output for your microcontrollers (like Arduino) and devices.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"7,0,0\"\u003e\n\u003cb\u003eMaximum Power Point Tracking (MPPT):\u003c\/b\u003e Features an advanced \u003cb\u003eMPPT function\u003c\/b\u003e to maximize the solar panel's conversion efficiency, ensuring optimal power capture regardless of light conditions.\u003c\/li\u003e\n\u003cli data-path-to-node=\"7,1,0\"\u003e\n\u003cb\u003eDual-Source Charging:\u003c\/b\u003e Supports charging the 3.7V Li-ion battery via a wide range of \u003cb\u003e6V~24V Solar Panels\u003c\/b\u003e (using DC-002 jack or screw terminals) or a \u003cb\u003e5V Micro USB\u003c\/b\u003e connection.\u003c\/li\u003e\n\u003cli data-path-to-node=\"7,2,0\"\u003e\n\u003cb\u003eStable 5V\/1A Output:\u003c\/b\u003e Provides a reliable \u003cb\u003e5V\/1A regulated output\u003c\/b\u003e through both a standard USB-A port and 2.54mm pinheaders, making it easy to connect external devices.\u003c\/li\u003e\n\u003cli data-path-to-node=\"7,3,0\"\u003e\n\u003cb\u003eAdjustable Efficiency:\u003c\/b\u003e An onboard \u003cb\u003eMPPT SET switch\u003c\/b\u003e allows you to select the voltage level closest to your solar panel's input (6V\/9V\/12V\/18V\/24V) for the highest charging efficiency.\u003c\/li\u003e\n\u003cli data-path-to-node=\"7,4,0\"\u003e\n\u003cb\u003eComprehensive Protection:\u003c\/b\u003e Equipped with multiple safety circuits, including \u003cb\u003eOver Charge, Over Discharge, Reverse Protection, Over Temperature, and Over Current\u003c\/b\u003e circuits, ensuring stable and safe operation.\u003c\/li\u003e\n\u003cli data-path-to-node=\"7,5,0\"\u003e\n\u003cb\u003eFlexible Battery Interface:\u003c\/b\u003e Includes both a \u003cb\u003e14500 battery holder\u003c\/b\u003e and a PH2.0 connector for connecting various types of 3.7V rechargeable Li batteries.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-path-to-node=\"8\"\u003e\u003cb\u003e⚠️ Safety Caution\u003c\/b\u003e\u003c\/h4\u003e\n\u003cblockquote data-path-to-node=\"9\"\u003e\n\u003cp data-path-to-node=\"9,0\"\u003e\u003cb\u003eDO NOT\u003c\/b\u003e put any non-rechargeable battery, such as a dry cell, into the battery holder. Serious consequences, including explosion, may occur if you attempt to charge a non-rechargeable battery.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003ch4 data-path-to-node=\"10\"\u003e\u003cb style=\"font-size: 0.875rem;\"\u003e📦 Package Contents\u003c\/b\u003e\u003c\/h4\u003e\n\u003ctable data-path-to-node=\"13\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eQty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eItem\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"13,1,0,0\"\u003e1\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"13,1,1,0\"\u003eSolar Power Management Module\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"13,2,0,0\"\u003e1\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"13,2,1,0\"\u003e14500 Rechargeable Lithium Battery\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":42198884417687,"sku":"21PS001921","price":120.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/mppt-solar-power-manager-3-7v-angled-view.jpg?v=1764657778"},{"product_id":"aa-ni-mh-rechargeable-battery-1200mah","title":"AA NiMH Rechargeable Battery 1.2V 1200mAh - DIY \u0026 Safety Ready","description":"\u003cp\u003e\u003cb\u003eOverview:\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003ePower your devices reliably with our brand new AA NiMH Rechargeable Battery. Featuring 1.2V and 1200mAh capacity, this battery is designed for long-lasting performance and convenience. Perfect for a wide range of applications, especially DIY projects where safety and reusability are key.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKey Features:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eVoltage:\u003c\/b\u003e 1.2 Volts\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCapacity:\u003c\/b\u003e 1200 mAh (Milliampere-hour)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRecharge Cycles:\u003c\/b\u003e Approximately 1000 times, offering excellent long-term value.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eType:\u003c\/b\u003e Ni-MH (Nickel-Metal Hydride) for reliable and safe power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSize:\u003c\/b\u003e Standard AA (14mm * 50mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWeight:\u003c\/b\u003e Approximately 28 grams\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSoldering Ready:\u003c\/b\u003e Comes with soldering tabs for easy integration into DIY projects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eVersatile Applications:\u003c\/b\u003e This versatile AA NiMH battery is an excellent choice for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWireless Microphones\u003c\/li\u003e\n\u003cli\u003eChildren's Toys\u003c\/li\u003e\n\u003cli\u003eElectric Razors\u003c\/li\u003e\n\u003cli\u003eElectric Toothbrushes\u003c\/li\u003e\n\u003cli\u003eRadios\u003c\/li\u003e\n\u003cli\u003eRemote Controls\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDIY Projects:\u003c\/b\u003e Specifically designed for safe use in custom builds like electric razors and teething toys, ensuring peace of mind.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eImportant Notes:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePlease use a compatible charger specifically designed for Nickel-Metal Hydride (Ni-MH) batteries. Incorrect chargers may damage the battery or pose a hazard.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFully charge the battery before first use\u003c\/b\u003e for optimal performance.\u003c\/li\u003e\n\u003cli\u003eDo not dispose of batteries in fire or expose them to excessive heat.\u003c\/li\u003e\n\u003cli\u003eDo not short-circuit the positive and negative terminals of the battery.\u003c\/li\u003e\n\u003cli\u003eDo not disassemble, puncture, or modify the battery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStore batteries in a cool, dry place\u003c\/b\u003e, away from direct sunlight and high temperatures.\u003c\/li\u003e\n\u003cli\u003eRemove batteries from devices when not in use for extended periods.\u003c\/li\u003e\n\u003cli\u003eDo not mix with batteries of different types, brands, or capacities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eKeep batteries out of reach of children\u003c\/b\u003e to prevent accidental ingestion or injury.\u003c\/li\u003e\n\u003cli\u003eIf the battery shows signs of leakage, deformation, overheating, or emits an unusual odor, discontinue use immediately.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eWhy Choose Our AA NiMH Battery?\u003c\/b\u003e Experience the benefits of rechargeable power, reducing waste and saving money. Our 1200mAh capacity ensures your devices run longer, while the high cycle life means you can recharge them repeatedly. With included soldering, it's ready for your custom electronic needs.\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":42284663668887,"sku":"","price":12.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/AA-NiMH-Battery-1-2V-Soldering-Teething-Toy.jpg?v=1754402519"},{"product_id":"dc-to-dc-step-down-module","title":"MP1584EN 3A Adjustable DC-DC Step-Down Buck Converter","description":"\u003cp\u003eMeet the \u003cb\u003eMP1584EN Mini DC-DC Step-Down Module\u003c\/b\u003e, a compact and highly efficient power regulator perfect for your electronics projects. This buck converter takes a higher input voltage and safely steps it down to a lower, adjustable output voltage. Its small size and high switching frequency make it an ideal replacement for older, bulkier regulators like the LM2596.\u003c\/p\u003e\n\u003cp\u003eWhether you're powering an Arduino, creating a custom battery-powered device, or need precise voltage for your DIY project, this module delivers stable and reliable performance.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cb\u003eKey Features\u003c\/b\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eHigh-Efficiency Conversion:\u003c\/b\u003e With up to 92% conversion efficiency, it minimizes power loss and heat generation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWide Voltage Range:\u003c\/b\u003e Accepts an input voltage from \u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e4.5\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eV\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e to \u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e28\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eV\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e and provides an adjustable output from \u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e0.8\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eV\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e to \u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e20\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eV\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAdjustable Output:\u003c\/b\u003e Features an onboard potentiometer for fine-tuning the output voltage to your exact needs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCompact \u0026amp; Lightweight:\u003c\/b\u003e Measuring only \u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e22\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003emm\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"mspace newline\"\u003e\u003c\/span\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003et\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eim\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003ees\u003c\/span\u003e\u003cspan class=\"mord\"\u003e17\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003emm\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e, it fits easily into space-constrained projects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHigh Switching Frequency:\u003c\/b\u003e A \u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e1.5\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eM\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eHz\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e switching frequency allows for smaller external inductors and capacitors, contributing to its miniature size.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cb\u003eCommon Applications\u003c\/b\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDIY mobile power supplies\u003c\/li\u003e\n\u003cli\u003ePowering microcontrollers like Arduino, ESP32, and Raspberry Pi\u003c\/li\u003e\n\u003cli\u003eBattery-powered cars, drones, and robotics\u003c\/li\u003e\n\u003cli\u003eLED lighting drivers\u003c\/li\u003e\n\u003cli\u003eTelecommunication and networking equipment\u003c\/li\u003e\n\u003cli\u003eAny project requiring efficient voltage reduction\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cb\u003eSpecifications\u003c\/b\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eChip:\u003c\/b\u003e MP1584EN\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eInput Voltage:\u003c\/b\u003e \u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e4.5\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eV\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e - \u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e28\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eV\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOutput Voltage:\u003c\/b\u003e \u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e0.8\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eV\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e - \u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e20\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eV\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e (Adjustable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOutput Current:\u003c\/b\u003e \u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e3\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eA\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e (Max), \u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e1.8\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eA\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e (Recommended continuous)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eConversion Efficiency:\u003c\/b\u003e 92% (Max)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSwitching Frequency:\u003c\/b\u003e \u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e1.5\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eM\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eHz\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOperating Temperature:\u003c\/b\u003e \u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e−\u003c\/span\u003e\u003cspan class=\"mord\"\u003e45°\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eC\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e to \u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e+\u003c\/span\u003e\u003cspan class=\"mord\"\u003e85°\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eC\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDimensions:\u003c\/b\u003e Approx. \u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e22\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003emm x \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"mord\"\u003e17\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003emm x \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"mord\"\u003e4\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003emm\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":42416552214679,"sku":"21PA000426","price":18.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/mp1584en-3a-adjustable-buck-converter-top-view.webp?v=1754393219"},{"product_id":"dc12v-1a-adapter-charger","title":"12V 1A DC Power Adapter - 5.5x2.1mm Output, UK Plug","description":"\u003cp data-sourcepos=\"12:1-12:75\"\u003e\u003cstrong\u003eReliable 12V 1A DC Power Adapter and Charger for Your Essential Devices\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-sourcepos=\"14:1-14:431\"\u003eEnsure a steady and reliable power supply for your electronic devices with our high-quality 12V 1A DC Power Adapter and \u003cstrong\u003echarger\u003c\/strong\u003e. This robust power supply delivers a consistent 12-volt output at 1 amp, making it ideal for a variety of low-power applications. It features a universal input voltage (100-240V) for global compatibility and a standard 5.5mm x 2.1mm DC output connector, commonly used across many electronic gadgets.\u003c\/p\u003e\n\u003cp data-sourcepos=\"16:1-16:32\"\u003e\u003cstrong\u003eKey Features \u0026amp; Benefits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-sourcepos=\"18:1-23:0\"\u003e\n\u003cli data-sourcepos=\"18:1-18:100\"\u003e\n\u003cstrong\u003eStable Power Output:\u003c\/strong\u003e Provides a consistent 12V 1A (12W max) to efficiently power your devices.\u003c\/li\u003e\n\u003cli data-sourcepos=\"19:1-19:118\"\u003e\n\u003cstrong\u003eUniversal Input:\u003c\/strong\u003e Accepts 100-240V AC input, allowing for worldwide use without the need for a voltage converter.\u003c\/li\u003e\n\u003cli data-sourcepos=\"20:1-20:143\"\u003e\n\u003cstrong\u003eStandard DC Connector:\u003c\/strong\u003e Equipped with a widely used 5.5mm x 2.1mm DC plug, ensuring broad compatibility with numerous electronic products.\u003c\/li\u003e\n\u003cli data-sourcepos=\"21:1-21:128\"\u003e\n\u003cstrong\u003eCenter Positive Polarity:\u003c\/strong\u003e Features standard center positive, outer negative polarity, matching common device requirements.\u003c\/li\u003e\n\u003cli data-sourcepos=\"22:1-23:0\"\u003e\n\u003cstrong\u003eUK Plug:\u003c\/strong\u003e Conveniently comes with a UK three-prong plug for direct use in compatible sockets in the UK and other regions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-sourcepos=\"24:1-25:57\"\u003e\u003cstrong\u003eWide Application:\u003c\/strong\u003e This 12V 1A power adapter and \u003cstrong\u003echarger\u003c\/strong\u003e is perfect for:\u003c\/p\u003e\n\u003cul data-sourcepos=\"26:1-31:0\"\u003e\n\u003cli data-sourcepos=\"26:1-26:35\"\u003eCCTV Cameras and Security Systems\u003c\/li\u003e\n\u003cli data-sourcepos=\"27:1-27:34\"\u003eDVR and NVR Surveillance Systems\u003c\/li\u003e\n\u003cli data-sourcepos=\"28:1-28:41\"\u003eLED Light Strips and other LED lighting\u003c\/li\u003e\n\u003cli data-sourcepos=\"29:1-29:18\"\u003eWireless Routers\u003c\/li\u003e\n\u003cli data-sourcepos=\"30:1-31:0\"\u003eSmall appliances and electronics requiring 12V 1A power with a 5.5x2.1mm DC input.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-sourcepos=\"32:1-32:27\"\u003e\u003cstrong\u003eProduct Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-sourcepos=\"34:1-40:0\"\u003e\n\u003cli data-sourcepos=\"34:1-34:30\"\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e TEKA012-1201000BS\u003c\/li\u003e\n\u003cli data-sourcepos=\"35:1-35:24\"\u003e\n\u003cstrong\u003eInput:\u003c\/strong\u003e 100-240V AC\u003c\/li\u003e\n\u003cli data-sourcepos=\"36:1-36:20\"\u003e\n\u003cstrong\u003eOutput:\u003c\/strong\u003e 12V 1A\u003c\/li\u003e\n\u003cli data-sourcepos=\"37:1-37:40\"\u003e\n\u003cstrong\u003eDC Output Connector:\u003c\/strong\u003e 5.5mm x 2.1mm\u003c\/li\u003e\n\u003cli data-sourcepos=\"38:1-38:47\"\u003e\n\u003cstrong\u003ePolarity:\u003c\/strong\u003e Center Positive, Outer Negative\u003c\/li\u003e\n\u003cli data-sourcepos=\"39:1-40:0\"\u003e\n\u003cstrong\u003ePlug Type:\u003c\/strong\u003e UK three-prong plug\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Black","offer_id":42777360597143,"sku":"","price":30.0,"currency_code":"HKD","in_stock":true},{"title":"White","offer_id":42777360629911,"sku":"","price":30.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/12V-1A-DC-Power-Adapter-UK-Plug-front.jpg?v=1754218199"},{"product_id":"mini-usb-2-channel-breadboad-power-supply","title":"MB-102 Breadboard Power Supply Module: 5V\/3.3V Mini USB (Arduino)","description":"\u003ch2\u003e\u003cb\u003eUnleash Your Breadboard Projects with Reliable Power!\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eThe MB-102 Breadboard Power Supply Module is your essential tool for powering DIY electronics, Arduino projects, and prototyping. Designed for convenience and versatility, this compact module provides stable 5V and 3.3V power directly to your breadboard, simplifying your circuit design and reducing wiring clutter.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eKey Features:\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDual Voltage Output:\u003c\/b\u003e Easily switch between 5V and 3.3V to suit the specific requirements of your components, from microcontrollers to sensors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWide Input Voltage Range:\u003c\/b\u003e Accepts DC 7-12V, making it compatible with common power adapters and battery packs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eConvenient Mini USB Interface:\u003c\/b\u003e Power your breadboard directly from a standard Mini USB cable, perfect for development environments or portable setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIntegrated Power Indicator:\u003c\/b\u003e A clear LED lets you know when your module is powered on and ready to go.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCurrent Protection:\u003c\/b\u003e Delivers up to 700mA output current, sufficient for most small to medium-sized breadboard circuits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDirect Breadboard Integration:\u003c\/b\u003e Designed to plug directly into MB-102 breadboards, saving space and simplifying connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIdeal for Arduino \u0026amp; DIY:\u003c\/b\u003e A must-have accessory for hobbyists, students, and engineers working with Arduino, ESP32, Raspberry Pi (GPIO), and other microcontroller-based projects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eSimplify your prototyping and ensure consistent power for your electronic creations!\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eInput Voltage:\u003c\/b\u003e DC 7-12V\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOutput Voltage:\u003c\/b\u003e Switchable 3.3V and 5V\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaximum Output Current:\u003c\/b\u003e 700mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eInterface:\u003c\/b\u003e Mini USB\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCompatibility:\u003c\/b\u003e Designed for MB-102 Breadboards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003ePacking Included:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1 x MB-102 Mini USB Breadboard Power Supply Module\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":42850609070231,"sku":"","price":15.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/products\/mb102-mini-usb-power-module-front.jpg?v=1754771247"},{"product_id":"18650-lithium-battery-pack-3-7v-7-4v-12v","title":"18650 Lithium Battery Pack - Rechargeable 3.7V \/ 7.4V \/ 12V Li-ion","description":"\u003ch4\u003e\u003cb\u003ePower Your Projects with Reliable 18650 Lithium Battery Packs\u003c\/b\u003e\u003c\/h4\u003e\n\u003cp\u003eGive your electronic devices and DIY projects a dependable and long-lasting power source with our high-quality 18650 Lithium-ion Battery Packs. Available in multiple voltage configurations, these packs are pre-wired and ready to integrate, making them the perfect choice for everything from custom electronics and robotics to powerful LED bike lights.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cb\u003eKey Features:\u003c\/b\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eMultiple Power Options:\u003c\/b\u003e Choose from 3.7V, 7.4V, or 12V to perfectly match your project's power requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHigh-Quality 18650 Cells:\u003c\/b\u003e Built with reliable and high-capacity 18650 Li-ion cells for consistent performance and a long service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBuilt-in Safety Protection:\u003c\/b\u003e Each battery pack includes an integrated protection board to prevent over-charging, over-discharging, and short-circuiting, ensuring safe and stable operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReady to Use:\u003c\/b\u003e Comes equipped with a standard \u003cb\u003eXH 2.54mm 2-Pin male connector\u003c\/b\u003e and a 14.5cm cable, allowing for quick and easy connection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurable Construction:\u003c\/b\u003e Professionally wrapped in durable blue PVC shrink tubing for added protection and stability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cb\u003eSelect Your Voltage:\u003c\/b\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e3.7V 2500mAh:\u003c\/b\u003e A single-cell pack, ideal for compact devices and direct 3.7V applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e7.4V 2500mAh:\u003c\/b\u003e A dual-cell (2S) pack, perfect for devices requiring higher voltage like portable speakers or RC cars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e12V 2000mAh:\u003c\/b\u003e A multi-cell (3S) pack designed for more demanding applications like LED strips, small motors, or security cameras.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003c\/h4\u003e\n\u003cdiv class=\"horizontal-scroll-wrapper\"\u003e\n\u003cdiv class=\"table-block-component\"\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003cdiv class=\"table-block has-export-button\"\u003e\n\u003cdiv class=\"table-content not-end-of-paragraph\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eFeature\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cb\u003eDetails\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eProduct Name\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e18650 Rechargeable Lithium Battery Pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eChemistry\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eLi-ion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eBattery Cell\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e18650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eNominal Voltage\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e3.7V \/ 7.4V \/ 12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eCapacity\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e2500mAh (for 3.7V\/7.4V), 2000mAh (for 12V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eConnector\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eXH 2.54mm Male 2-Pin Plug\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eCable Length\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 14.5cm \/ 5.71 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eDimensions (3.7V)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 65mm x 18mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!----\u003e\n\u003c\/div\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cb\u003ePackage Includes:\u003c\/b\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e1 x 18650 Lithium Battery Pack (in your chosen voltage)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eImportant Note:\u003c\/b\u003e Please verify the voltage and connector polarity of your device before connecting to prevent damage.\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"3.7v 18650 2500mah","offer_id":43183226585239,"sku":"","price":29.0,"currency_code":"HKD","in_stock":true},{"title":"7.4v 18650 2500mah","offer_id":43183226618007,"sku":"","price":45.0,"currency_code":"HKD","in_stock":true},{"title":"12v 18650 2000mah","offer_id":43183226650775,"sku":"","price":48.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/18650-lithium-battery-packs-3-7v-7-4v-12v.jpg?v=1754997637"},{"product_id":"type-c-lithium-battery-charging-board-3a","title":"3A Type-C Lithium Battery Fast Charging Board - IP2312 High Efficiency","description":"\u003ch2 data-path-to-node=\"8\"\u003eFaster Charging for High-Demand DIY Projects\u003c\/h2\u003e\n\u003cp data-path-to-node=\"9\"\u003eStandard charging modules often bottleneck at 1A, leading to frustrating downtime. Our \u003cb data-path-to-node=\"9\" data-index-in-node=\"87\"\u003eIP2312 3A Charging Board\u003c\/b\u003e solves this by providing a high-current output that significantly reduces charging cycles. The integrated \u003cb data-path-to-node=\"9\" data-index-in-node=\"218\"\u003eType-C input\u003c\/b\u003e ensures compatibility with modern chargers and cables, making it a future-proof choice for your electronic builds.\u003c\/p\u003e\n\u003cp data-path-to-node=\"9\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"10\"\u003ePrecision CC\/CV Charging Logic\u003c\/h3\u003e\n\u003cp data-path-to-node=\"11\"\u003eTo maximize battery lifespan, this module employs a sophisticated \u003cb data-path-to-node=\"11\" data-index-in-node=\"66\"\u003eConstant Current (CC) and Constant Voltage (CV)\u003c\/b\u003e charging algorithm:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"12,0,0\"\u003e\n\u003cb data-path-to-node=\"12,0,0\" data-index-in-node=\"0\"\u003eTrickle Mode:\u003c\/b\u003e Gently revives batteries under 3V with 100mA.\u003c\/li\u003e\n\u003cli data-path-to-node=\"12,1,0\"\u003e\n\u003cb data-path-to-node=\"12,1,0\" data-index-in-node=\"0\"\u003eFast Charge:\u003c\/b\u003e Rapidly pumps power at 3A once above 3V.\u003c\/li\u003e\n\u003cli data-path-to-node=\"12,2,0\"\u003e\n\u003cb data-path-to-node=\"12,2,0\" data-index-in-node=\"0\"\u003eSmart Cut-off:\u003c\/b\u003e Automatically stops and re-checks voltage every 4 minutes as it nears full capacity to prevent overcharging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"13\"\u003eProfessional Thermal Management \u0026amp; Efficiency\u003c\/h3\u003e\n\u003cp data-path-to-node=\"14\"\u003eHeat is the enemy of electronics. Thanks to the synchronous switching architecture, this module reaches \u003cb data-path-to-node=\"14\" data-index-in-node=\"104\"\u003e93%–95% efficiency\u003c\/b\u003e, keeping the board cooler even during peak 3A output. The compact \u003cspan class=\"math-inline\" data-math=\"31mm \\times 14.8mm\" data-index-in-node=\"189\"\u003e$31mm \\times 14.8mm$\u003c\/span\u003e footprint allows for easy integration into tight enclosures without compromising on power.\u003c\/p\u003e\n\u003cblockquote data-path-to-node=\"15\"\u003e\n\u003cp data-path-to-node=\"15,0\"\u003e\u003cb data-path-to-node=\"15,0\" data-index-in-node=\"0\"\u003eNote:\u003c\/b\u003e This module does \u003ci data-path-to-node=\"15,0\" data-index-in-node=\"23\"\u003enot\u003c\/i\u003e include battery protection. For a complete safety setup, we recommend pairing this with a dedicated BMS\/Protection board available in our store.\u003c\/p\u003e\n\u003c\/blockquote\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":43284736573591,"sku":"21PS002133","price":15.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/ip2312-3a-type-c-lithium-battery-charging-board.jpg?v=1770713037"},{"product_id":"5v-2a-charge-discharge-integrated-module","title":"5V 2A Power Bank DIY Module | Type-C Li-ion Charge \u0026 Discharge Board","description":"\u003ch2 data-path-to-node=\"5\"\u003eProfessional Grade Power Management for DIY Projects\u003c\/h2\u003e\n\u003cp data-path-to-node=\"6\"\u003eWhen it comes to DIY electronics, power stability is everything. Our \u003cb data-path-to-node=\"6\" data-index-in-node=\"69\"\u003e5V 2A Integrated Module\u003c\/b\u003e eliminates the need for separate charging and boosting boards. It provides a seamless transition between charging your lithium battery and powering your external devices via USB.\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"7\"\u003eHigh-Precision Charging with Type-C\u003c\/h3\u003e\n\u003cp data-path-to-node=\"8\"\u003eForget outdated Micro-USB. This module utilizes a \u003cb data-path-to-node=\"8\" data-index-in-node=\"50\"\u003eType-C interface\u003c\/b\u003e, ensuring better durability and compatibility with modern cables. The high-precision charging circuit (±0.5% accuracy) protects your lithium batteries (3.7V\/4.2V) from overcharging, extending their overall lifespan.\u003c\/p\u003e\n\u003cp data-path-to-node=\"8\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"9\"\u003eOptimized 92.5% Conversion Efficiency\u003c\/h3\u003e\n\u003cp data-path-to-node=\"10\"\u003eEfficiency is the difference between a power bank that lasts and one that wastes energy as heat. By achieving \u003cb data-path-to-node=\"10\" data-index-in-node=\"110\"\u003e92.5% efficiency\u003c\/b\u003e at 5V 2A output, this board ensures that most of your battery's capacity goes directly into charging your smartphone or powering your STEM projects.\u003c\/p\u003e\n\u003cp data-path-to-node=\"10\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"11\"\u003eBuilt-In Safety \u0026amp; Stability\u003c\/h3\u003e\n\u003cp data-path-to-node=\"12\"\u003eEquipped with \u003cb data-path-to-node=\"12\" data-index-in-node=\"14\"\u003eLine Loss Compensation\u003c\/b\u003e, the module automatically adjusts the output voltage (5V–5.15V) to account for the resistance in your charging cable, guaranteeing a steady flow of power. The low static current (\u0026lt;30uA) means your battery won't drain even when the module is idle for long periods.\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":43284867776663,"sku":"21PS002134","price":10.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/5v-2a-power-bank-module-type-c-top.jpg?v=1770711323"},{"product_id":"pansonic-1860-3450mah-lithium-rechargeable-battery","title":"Panasonic NCR18650GA 3300mAh Li-ion Rechargeable Battery (Authentic)","description":"\u003cp\u003eLooking for a reliable power source that won't let you down? The \u003cstrong\u003ePanasonic NCR18650GA 3300mAh Li-ion battery\u003c\/strong\u003e is widely recognized as one of the most stable and high-performing cells on the market. Engineered for maximum energy density and safety, it is the preferred choice for professional-grade flashlights, power tools, and custom electronics.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Choose the Panasonic NCR18650GA?\u003c\/h2\u003e\n\u003cp\u003eNot all 18650 batteries are created equal. Cheap alternatives often exaggerate capacity and lack safety mechanisms. The Panasonic NCR18650GA provides:\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAuthentic High Capacity:\u003c\/strong\u003e Real-world 3300mAh performance for longer runtimes between charges.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSuperior Safety:\u003c\/strong\u003e Built-in explosion-proof design for peace of mind during high-drain usage.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLong Cycle Life:\u003c\/strong\u003e Engineered to withstand up to 1000 charge cycles, offering excellent value for money.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Sun Cheong Computer Advantage\u003c\/h3\u003e\n\u003cp\u003eAt \u003cstrong\u003eSun Cheong Computer\u003c\/strong\u003e, we understand that battery safety is non-negotiable. With over 20 years of experience in Sham Shui Po's Ap Liu Street, we don't just sell components; we provide expertise.\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGuaranteed Quality:\u003c\/strong\u003e Avoid counterfeit risks; we source only reliable, genuine cells.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOn-Site Testing:\u003c\/strong\u003e Unsure about compatibility? Bring your device to our \u003cstrong\u003eSham Shui Po store\u003c\/strong\u003e for a consultation.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eClick \u0026amp; Collect:\u003c\/strong\u003e Shop online and pick up at our store for instant access to your power solutions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Always handle Li-ion batteries with care. Do not discharge below 2.75V. Ensure your charger is compatible with 3.7V\/4.2V Li-ion chemistry.\u003c\/em\u003e\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":43466854596759,"sku":"","price":48.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/panasonic-ncr18650ga-3450mah-li-ion-battery-pair.jpg?v=1754218831"},{"product_id":"cr2032-lithium-battery-1pc","title":"Maxell CR2032 3V Lithium Battery - Single Pack","description":"\u003cp\u003eThe CR2032 3V Lithium Battery is a reliable and long-lasting power source for a wide range of devices. This single-pack button cell is perfect for home, professional, and commercial use, providing consistent and durable performance.\u003c\/p\u003e\n\u003cp\u003eDon't let your essential gadgets run out of power. The CR2032 battery is the perfect fit for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eClocks \u0026amp; Digital thermometers\u003c\/li\u003e\n\u003cli\u003eCalculators \u0026amp; Laser pointers\u003c\/li\u003e\n\u003cli\u003eKeyless entry \u0026amp; Car alarms\u003c\/li\u003e\n\u003cli\u003eLED candles \u0026amp; Wireless doorbells\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eKey Features \u0026amp; Specifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eOur CR2032 batteries are engineered for performance and reliability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eChemistry:\u003c\/b\u003e Lithium\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVoltage:\u003c\/b\u003e 3 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCurrent:\u003c\/b\u003e 280mAh\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDimensions:\u003c\/b\u003e 20 mm diameter, 3.2 mm height\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Maxell","offers":[{"title":"Default Title","offer_id":43477677080727,"sku":"21BY000047","price":3.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/maxell-cr2032-3v-lithium-battery-pack.jpg?v=1757430633"},{"product_id":"5v-relay-module-4-8-16-channel","title":"5V Relay Module Expansion Board (4, 8, 16 Channel) for Arduino \u0026 IoT","description":"\u003cp data-path-to-node=\"8\"\u003eSafely control high-voltage devices using low-voltage microcontrollers with our robust 5V Relay Modules. Available in 4, 8, and 16-channel configurations, these boards are the industry standard for Home Automation, Robotics, and Industrial Control projects.\u003c\/p\u003e\n\u003cp data-path-to-node=\"9\"\u003eWhether you are using an Arduino, Raspberry Pi, ARM, AVR, or PIC, these modules provide a reliable interface to switch AC 250V 10A or DC 30V 10A loads with ease.\u003c\/p\u003e\n\u003cp data-path-to-node=\"10\"\u003e\u003cb\u003eKey Features\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"11,0,0\"\u003e\n\u003cb\u003eVersatile Options:\u003c\/b\u003e Choose from 4-channel, 8-channel, or 16-channel variants to suit your project scale.\u003c\/li\u003e\n\u003cli data-path-to-node=\"11,1,0\"\u003e\n\u003cb\u003eHigh-Load Capacity:\u003c\/b\u003e Equipped with high-current Songle relays rated at AC 250V\/10A and DC 30V\/10A.\u003c\/li\u003e\n\u003cli data-path-to-node=\"11,2,0\"\u003e\n\u003cb\u003eBroad Compatibility:\u003c\/b\u003e Standard interface design ensures seamless integration with Arduino, 8051, AVR, PIC, DSP, ARM, MSP430, and TTL logic.\u003c\/li\u003e\n\u003cli data-path-to-node=\"11,3,0\"\u003e\n\u003cb\u003eEnhanced Safety:\u003c\/b\u003e Features independent wiring for contact parts and optical isolation (on supported models) for stable and safe performance.\u003c\/li\u003e\n\u003cli data-path-to-node=\"11,4,0\"\u003e\n\u003cb\u003eEasy Installation:\u003c\/b\u003e Built-in fixed screw mounting holes allow for secure and tidy installation in enclosures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"12\"\u003e\u003cb\u003eTechnical Specifications\u003c\/b\u003e\u003c\/p\u003e\n\u003ctable data-path-to-node=\"13\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDetail\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-path-to-node=\"13,1,0,0\"\u003e\u003cb\u003eInput Voltage\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd data-path-to-node=\"13,1,1,0\"\u003e5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-path-to-node=\"13,2,0,0\"\u003e\u003cb\u003eRelay Rating (AC)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd data-path-to-node=\"13,2,1,0\"\u003eMax 250V \/ 10A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-path-to-node=\"13,3,0,0\"\u003e\u003cb\u003eRelay Rating (DC)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd data-path-to-node=\"13,3,1,0\"\u003eMax 30V \/ 10A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-path-to-node=\"13,4,0,0\"\u003e\u003cb\u003eTrigger Logic\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd data-path-to-node=\"13,4,1,0\"\u003eLow Level Trigger (Standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-path-to-node=\"13,5,0,0\"\u003e\u003cb\u003eIndication\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd data-path-to-node=\"13,5,1,0\"\u003eLED Status Indicators for each channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-path-to-node=\"13,6,0,0\"\u003e\u003cb\u003eDimensions (4-Ch)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd data-path-to-node=\"13,6,1,0\"\u003e75mm x 50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-path-to-node=\"13,7,0,0\"\u003e\u003cb\u003eDimensions (8-Ch)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd data-path-to-node=\"13,7,1,0\"\u003e137mm x 50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-path-to-node=\"13,8,0,0\"\u003e\u003cb\u003eDimensions (16-Ch)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd data-path-to-node=\"13,8,1,0\"\u003e177mm x 80mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp data-path-to-node=\"14\"\u003e\u003cb\u003eApplications\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"15,0,0\"\u003eSmart Home \/ Home Automation\u003c\/li\u003e\n\u003cli data-path-to-node=\"15,1,0\"\u003eIndustrial Control Systems\u003c\/li\u003e\n\u003cli data-path-to-node=\"15,2,0\"\u003eDIY Robotics\u003c\/li\u003e\n\u003cli data-path-to-node=\"15,3,0\"\u003eIoT (Internet of Things) Device Control\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"5V 4 Channel","offer_id":43481158746263,"sku":"","price":25.0,"currency_code":"HKD","in_stock":true},{"title":"5v 8 Channel","offer_id":43481158779031,"sku":"","price":39.0,"currency_code":"HKD","in_stock":true},{"title":"5v 16 Channel","offer_id":43481158811799,"sku":"","price":69.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/5v-relay-module-collection-4-8-16-channel.jpg?v=1763719108"},{"product_id":"esp-01s-5v-wifi-relay-module","title":"ESP8266 ESP-01S 5V WiFi Relay Module (Supports APP Remote Control)","description":"\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eThis smart relay module is specially designed for the ESP-01S WiFi module, making it an ideal choice for DIY smart home projects. With this module, you can easily convert traditional appliances into smart devices and remotely control their power via a mobile app. The design supports plug-and-play use and offers LUA source code, making it easy for developers to get started quickly.\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eSmart Home DIY Preferred: Designed for IoT applications, perfect for building your own smart switches and sockets.\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" rel=\"nofollow noopener\" data-state=\"closed\"\u003e\u003ca rel=\"noopener\" class=\"inline\" href=\"https:\/\/www.alibaba.com\/product-detail\/ESP8266-ESP-01S-ESP01-S-5V_62088686780.html\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eRemote Control: Works with ESP-01S module, allowing you to control appliances anytime, anywhere via mobile app.\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" rel=\"nofollow noopener\" data-state=\"closed\" aria-label=\"ESP8266 ESP-01S 5V Wifi Relay Module for Smart Home ...\"\u003e\u003ca rel=\"noopener\" class=\"inline\" href=\"https:\/\/www.alibaba.com\/product-detail\/ESP8266-ESP-01S-ESP01-S-5V_62088686780.html\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eHigh Load Capacity: Relay supports up to 10A 250VAC \/ 10A 30VDC, suitable for most household appliances.\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" rel=\"nofollow noopener\" data-state=\"closed\"\u003e\u003ca rel=\"noopener\" class=\"inline\" href=\"https:\/\/chinese.alibaba.com\/product-detail\/ESP8266-ESP-01S-5V-WiFi-Relay-62150700110.html\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eWide Compatibility: Optimized for ESP-01S (built-in pull-up resistor), also compatible with ESP-01 (requires external 10K pull-up resistor).\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eWorking Voltage: DC 5V.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eInput Voltage: DC 5V\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eRelay Model: SRD-05VDC-SL-C\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eLoad Ratings:\n\u003cul\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e10A 250VAC\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e10A 125VAC\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e10A 30VDC\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e10A 28VDC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eESP-01 vs ESP-01S Note:\u003c\/strong\u003e\u003cbr\u003eThis module is optimized for the ESP-01S, which has the required pull-up resistor on the board. If you are using the older ESP-01 version, you need to connect a 10K pull-up resistor manually.\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eImportant Notice (Disclaimer):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eTechnical Level: This product is a developer module and requires users to download and flash firmware themselves.\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eNo Technical Support: Store only provides hardware and basic info, not programming or troubleshooting assistance. Beginners should consider their skills before purchasing.\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eReturn Policy: No warranty or returns for damage due to incorrect operation (such as wrong wiring or over-voltage). Please handle with care.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eReference \u0026amp; Downloads:\u003c\/strong\u003e\u003cbr\u003eThe following supplier links include the Android app and LUA source code. Note: Links may become inaccessible at any time, and the store is not responsible for external content.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eESP8266 Docs:\u003cspan\u003e \u003c\/span\u003e\u003ca rel=\"nofollow noopener\" class=\"reset interactable cursor-pointer decoration-1 underline-offset-1 text-super hover:underline font-semibold\" href=\"https:\/\/pan.baidu.com\/s\/1X-_xI9pWe-FH5rPXtVJ1qQ?pwd=a5c8\" target=\"_blank\"\u003e\u003cspan class=\"text-box-trim-both\"\u003ehttps:\/\/pan.baidu.com\/s\/1X-_xI9pWe-FH5rPXtVJ1qQ?pwd=a5c8\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003e(code: a5c8)\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eAPP \u0026amp; LUA Source:\u003cspan\u003e \u003c\/span\u003e\u003ca rel=\"nofollow noopener\" class=\"reset interactable cursor-pointer decoration-1 underline-offset-1 text-super hover:underline font-semibold\" href=\"https:\/\/pan.baidu.com\/s\/17bxsjaolH6lyPF0HihAVsw?pwd=tiry\" target=\"_blank\"\u003e\u003cspan class=\"text-box-trim-both\"\u003ehttps:\/\/pan.baidu.com\/s\/17bxsjaolH6lyPF0HihAVsw?pwd=tiry\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003e(code: tiry)\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eESP-01S Docs:\u003cspan\u003e \u003c\/span\u003e\u003ca rel=\"nofollow noopener\" class=\"reset interactable cursor-pointer decoration-1 underline-offset-1 text-super hover:underline font-semibold\" href=\"https:\/\/pan.baidu.com\/s\/1G_tb3Xz51RJBdjPBQHAXug?pwd=6yk5\" target=\"_blank\"\u003e\u003cspan class=\"text-box-trim-both\"\u003ehttps:\/\/pan.baidu.com\/s\/1G_tb3Xz51RJBdjPBQHAXug?pwd=6yk5\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003e(code: 6yk5)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":43506139922583,"sku":"21PS001375","price":25.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/esp8266-esp-01s-5v-wifi-relay-module-smart-home-switch.jpg?v=1763542214"},{"product_id":"cr927-battery-1pc","title":"CR927 Lithium 3V Coin Cell Battery (1pc) - Long-Lasting Power","description":"\u003cp\u003e\u003cb\u003eReliable Power for Your Small Devices: CR927 Lithium 3V Coin Cell Battery\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eLooking for a dependable power source for your small electronics? \u003cspan class=\"citation-155\"\u003eOur \u003c\/span\u003e\u003cb\u003e\u003cspan class=\"citation-155\"\u003eCR927 Lithium 3V Coin Cell Battery\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-155 citation-end-155\"\u003e delivers long-lasting, stable, and high-quality power.\u003csup data-turn-source-index=\"1\" class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-154 citation-end-154\"\u003eThis compact button cell is perfect for a wide array of devices, ensuring they run efficiently when you need them most.\u003csup data-turn-source-index=\"2\" class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e Sold individually, this single CR927 battery is ready to power your essentials.\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/h3\u003e\n\u003ch3\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eSpecifications \u0026amp; Common Uses\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"citation-153\"\u003eThe CR927 battery is a popular button cell type, featuring a compact design with a \u003c\/span\u003e\u003cb\u003e\u003cspan class=\"citation-153\"\u003e9.5mm diameter and 2.7mm thickness\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-153 citation-end-153\"\u003e.\u003csup data-turn-source-index=\"3\" class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-152 citation-end-152\"\u003eUtilizing advanced lithium chemistry, it provides high energy density and consistent 3-volt output.\u003csup data-turn-source-index=\"4\" class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e It's commonly found in:\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/h3\u003e\n\u003ch3\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWatches \u0026amp; Calculators\u003c\/li\u003e\n\u003cli\u003eMini Lights \u0026amp; Electronic Toys\u003c\/li\u003e\n\u003cli\u003eRemote Controls\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"citation-151 citation-end-151\"\u003eMedical Instruments \u0026amp; Sensors\u003c\/span\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/li\u003e\n\u003cli\u003eOther small electronic devices requiring a reliable, compact power source.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eParagraph 3: Performance \u0026amp; Safety Features\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eExperience peace of mind with the CR927 battery's exceptional performance. \u003cspan class=\"citation-150\"\u003eIt boasts a \u003c\/span\u003e\u003cb\u003e\u003cspan class=\"citation-150\"\u003elong lifespan and stable operation\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-150 citation-end-150\"\u003e, providing a continuous and reliable power supply.\u003csup data-turn-source-index=\"6\" class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-149\"\u003eDesigned to operate across a wide temperature range, these batteries also feature \u003c\/span\u003e\u003cb\u003e\u003cspan class=\"citation-149\"\u003eleak-proof construction\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-149 citation-end-149\"\u003e for enhanced safety and durability.\u003c\/span\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/h3\u003e\n\u003ch3\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eCompatibility \u0026amp; Replacement (Important)\u003c\/b\u003e \u003cspan class=\"citation-148\"\u003e\"This CR927 3V Lithium Battery can replace models such as \u003c\/span\u003e\u003cb\u003e\u003cspan class=\"citation-148\"\u003eMR9, LR9, V625U, and PX625A\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-148 citation-end-148\"\u003e.\u003csup data-turn-source-index=\"8\" class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e Please verify your device's required battery model to ensure perfect compatibility.\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/h3\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cb\u003eIMPORTANT USAGE NOTICE:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eConfirm Model:\u003c\/b\u003e Always confirm the required battery model for your electronic device to avoid compatibility issues.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSingle Use Only:\u003c\/b\u003e This product is for single-use only and \u003cb\u003eshould NOT be recharged.\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSafety First:\u003c\/b\u003e Do not recharge, invert, expose to fire, or mix with other battery types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHandle with Care:\u003c\/b\u003e Avoid touching the product with sharp objects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eNote on Appearance:\u003c\/b\u003e There may be slight color differences between photos and the actual product. Please refer to the item received.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":43586918056087,"sku":"","price":3.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/lithium-3v-cr927-coin-battery-single.jpg?v=1754218962"},{"product_id":"lithium-li-ion-18650-step-up-boost-module","title":"3.7V Lithium Battery Charger Board | DC-DC Step-Up Boost Module","description":"\u003cp\u003e\u003cb\u003e3.7V Lithium Battery Charger \u0026amp; Boost Module with Type-C USB\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003ePower up your projects with our ultra-compact and high-performance 3.7V Lithium Battery Charger Board! This versatile DC-DC Step-Up Boost Module is perfect for DIY enthusiasts and electronics projects, offering both reliable charging and adjustable voltage output.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWhy You Need This Module:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eCompact \u0026amp; Efficient Design:\u003c\/b\u003e Featuring an ultra-thin, mini design with half-hole screw holes and selected premium materials for durability and performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVersatile Charging:\u003c\/b\u003e Supports single 3.7V Li-ion batteries (like 18650, polymer), fully charging them to 4.2V.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAdjustable Output Voltage:\u003c\/b\u003e Boosts voltage from 4.2V up to 28V, allowing you to power a wide range of devices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSmart Charging Protection:\u003c\/b\u003e Equipped with constant current\/constant voltage (CC\/CV) charging, over-temperature protection, soft start to limit inrush current, and reverse battery protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDual Status Indicators:\u003c\/b\u003e Clear LED indicators (Red CHRG, Blue STDBY) show charging progress, full charge, no battery, and fault status.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFlexible Input:\u003c\/b\u003e Choose between a convenient Type-C USB interface or solder joint input on the back. Recommended input voltage is around 5V.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e0V Activation \u0026amp; Trickle Charge:\u003c\/b\u003e Safely revive deeply discharged batteries with 0V activation and 2.9V trickle charging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHigh Power Output:\u003c\/b\u003e Delivers a maximum power of 5W, suitable for various applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eKey Features \u0026amp; Parameters:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eOperating Temperature:\u003c\/b\u003e -40°C ~ 80°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eInput Voltage Range:\u003c\/b\u003e 4.2V ~ 6.5V\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOutput Voltage:\u003c\/b\u003e 4.2V - 28V (Adjustable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaximum Power:\u003c\/b\u003e 5W\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCharging Current:\u003c\/b\u003e Up to 1A programmable linear charge current\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBattery Compatibility:\u003c\/b\u003e 3.7V Lithium (Li-ion 18650, Polymer, etc.)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eUnderstanding the Charging Indicator Lights:\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe module uses two LEDs to indicate its working status:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eCharging:\u003c\/b\u003e Red light (CHRG) is bright, Blue light (STDBY) is off.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFully Charged:\u003c\/b\u003e Blue light (STDBY) is on, Red light (CHRG) is slightly dim.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBoost Output Active:\u003c\/b\u003e Behavior may vary based on output power. Red light might stay on during charging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eNo Connection\/No Load:\u003c\/b\u003e Blue light is on, Red light is slightly dim.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eSimple Setup \u0026amp; Battery Connection Guide:\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe module supports both Type-C USB and solder joint inputs. Both output ports are identical and wired in parallel.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eConnecting Your Battery:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eFor Batteries with a Protection Board:\u003c\/b\u003e Choose a module \u003ci\u003ewithout\u003c\/i\u003e built-in discharge protection. After connecting B+ and B-, you \u003ci\u003emust\u003c\/i\u003e short the 'T' point for proper charging and discharging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFor Batteries WITHOUT a Protection Board:\u003c\/b\u003e \u003cb\u003eCRITICAL:\u003c\/b\u003e Choose a module \u003ci\u003ewith\u003c\/i\u003e discharge protection (if available for this specific product, or ensure your battery has external protection). Connecting the battery to B+ and B- \u003cb\u003ewithout\u003c\/b\u003e a protection board requires you \u003cb\u003eNOT\u003c\/b\u003e to short the 'T' point, as this will disable the discharge protection and can damage your battery.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eAdjusting Output Voltage:\u003c\/b\u003e Once wires are connected, use a small screwdriver to adjust the desired output voltage via the onboard potentiometer.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eImportant Usage Notes:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eNormal Heating:\u003c\/b\u003e This product uses linear charging, so some heat generation during operation is normal and safe.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eParallel Connection Only:\u003c\/b\u003e Batteries should only be connected in parallel, never in series.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOptimal Charging Current:\u003c\/b\u003e The ideal charging current is 0.37C of your battery's capacity (e.g., 400mA for a 1000mAh battery).\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCable Quality Matters:\u003c\/b\u003e Ensure charging wires are not too thin or too long to minimize resistance, which can affect battery voltage after charging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGood Battery Connection:\u003c\/b\u003e A solid connection to the battery is crucial to prevent significant voltage drop after charging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHeat with High Boost Current:\u003c\/b\u003e It's normal for the module to generate heat when the boost current is high. Higher power output equals more heat. The chip has built-in overheating protection for safe operation.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":43617681899671,"sku":"","price":18.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/lithium-battery-charger-board-components.jpg?v=1755676500"},{"product_id":"12-24v-to-5v-10a-power-module","title":"DC 12V-24V to 5V 10A Step Down Power Converter Module (50W)","description":"\u003ch2 data-path-to-node=\"8\"\u003eReliable Power Conversion for Demanding Electronics\u003c\/h2\u003e\n\u003cp data-path-to-node=\"9\"\u003ePowering 5V devices from a 12V or 24V source shouldn't be a gamble. Whether you are wiring a custom dashcam setup in your vehicle or building an extensive CCTV monitoring network, unstable voltage can instantly destroy expensive equipment. This \u003cb data-path-to-node=\"9\" data-index-in-node=\"245\"\u003eDC power converter PCBA module\u003c\/b\u003e acts as a dependable bridge, safely stepping down higher voltages to a clean, usable 5V at up to 10 Amps.\u003c\/p\u003e\n\u003cp data-path-to-node=\"9\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"10\"\u003eBuilt for Stability and Safety\u003c\/h3\u003e\n\u003cp data-path-to-node=\"11\"\u003eThis regulator is designed with longevity in mind. It utilizes an open-frame design that allows for \u003cb data-path-to-node=\"11\" data-index-in-node=\"100\"\u003efree air convection cooling\u003c\/b\u003e, preventing the buildup of damaging heat during continuous operation.\u003c\/p\u003e\n\u003cp data-path-to-node=\"12\"\u003eFurthermore, you don't have to worry about power spikes or electrical failures. The module comes equipped with a comprehensive suite of safety features, including \u003cb data-path-to-node=\"12\" data-index-in-node=\"163\"\u003elow voltage, overload, and over-temperature protections\u003c\/b\u003e. If the system detects a critical fault, it automatically safeguards both the converter and your connected devices.\u003c\/p\u003e\n\u003cp data-path-to-node=\"12\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"13\"\u003eVersatile Applications for Auto and Industrial Use\u003c\/h3\u003e\n\u003cp data-path-to-node=\"14\"\u003eFrom DIY enthusiasts to professional installers, this step-down module is incredibly adaptable. Its wide input range (DC 10V-30V) makes it the perfect companion for 12V car accumulators or 24V commercial vehicle batteries. It is widely trusted for running medical equipment, precision meters, railway signal systems, and high-draw LED displays.\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":43651598286999,"sku":"21PA000740","price":99.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/24v-to-5v-10a-buck-regulator-module-top-view.jpg?v=1774939795"},{"product_id":"18650-battery-protection-module-3-7v-10a","title":"1S 3.7V 10A 18650 Battery Protection Board (BMS) | Safe Lithium Power","description":"\u003ch2 data-path-to-node=\"8\"\u003e\u003cb data-path-to-node=\"8\" data-index-in-node=\"0\"\u003eUltimate Protection for Your Lithium-Ion Projects\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp data-path-to-node=\"8\"\u003eWorking with 18650 lithium batteries requires precision and absolute safety. Whether you are repairing a flashlight, building a custom power bank, or designing reliable power systems for STEM electronics like Arduino and Raspberry Pi, battery health is critical. This 1S (Single Cell) Battery Management System (BMS) acts as a vigilant safeguard for your power source, ensuring every charge and discharge cycle is perfectly regulated.\u003c\/p\u003e\n\u003cp data-path-to-node=\"8\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"9\"\u003e\u003cb data-path-to-node=\"9\" data-index-in-node=\"0\"\u003eWhy You Need a Dedicated BMS Module\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"9\"\u003eLithium-ion cells possess incredible energy density but are highly sensitive to voltage extremes. Our protection board actively monitors your 3.7V cell. If the voltage spikes dangerously high during charging or drops too low under heavy load, the board instantly severs the connection. This critical intervention prevents irreversible cell chemistry damage, swelling, overheating, and potential fire hazards, giving your hardware enterprise-grade stability.\u003c\/p\u003e\n\u003cp data-path-to-node=\"9\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"10\"\u003e\u003cb data-path-to-node=\"10\" data-index-in-node=\"0\"\u003eUltra-Compact Design, Robust 10A Output\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"10\"\u003eDespite its ultra-compact 35mm footprint, this PCB efficiently handles a continuous working current of up to 10A, with momentary peaks up to 12A. This makes it perfect for high-drain applications like DC motors, custom LED lighting rigs, and portable power tools. You never have to compromise on performance to guarantee the safety of your electronics.\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":43672735318167,"sku":"21PS002135","price":10.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/18650-battery-protection-board-1s-front.jpg?v=1775886289"},{"product_id":"16-8v-4s-18650-battery-protection-module","title":"4S 20A 18650 Lithium Battery Protection Board | 14.8V 16.8V BMS Module","description":"\u003ch2 data-path-to-node=\"22\"\u003eComprehensive Battery Management for 14.8V\/16.8V Packs\u003c\/h2\u003e\n\u003cp data-path-to-node=\"23\"\u003eDesigned for 4-series (4S) lithium-ion configurations, this module manages the delicate balance of four 3.7V cells. It operates at a nominal 14.8V and reaches a full 16.8V charge capacity. Integrated with the high-precision BM3451 protection IC and MDU1515 low-resistance MOSFETs, it ensures maximum energy efficiency with minimal heat generation.\u003c\/p\u003e\n\u003cp data-path-to-node=\"23\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"24\"\u003eWhy Your Project Needs This 4S BMS\u003c\/h3\u003e\n\u003cp data-path-to-node=\"25\"\u003eStandard lithium cells are volatile if mismanaged. This board acts as a permanent guardian, monitoring individual cell voltages with \u003cspan data-index-in-node=\"133\" data-math=\"\\pm 25\\text{mV}\" class=\"math-inline\"\u003e+-25mv\u003c\/span\u003e accuracy. It doesn't just cut power; it manages the health of your energy storage to prevent premature cell death and hazardous thermal events.\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":43672802721943,"sku":"21PS001259","price":25.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/4s-18650-bms-protection-board-16-8v-20a.jpg?v=1775888121"},{"product_id":"3-6v-to-400kv-module","title":"3V-6V to 400kV High Voltage Generator Module - DC Boost Converter","description":"\u003ch2 class=\"mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end font-editorial font-bold text-base first:mt-0\"\u003eUnleash Extreme Voltage from Minimal Power\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eThis high-voltage step-up power module represents a breakthrough in compact voltage conversion technology. Using advanced boost converter principles, it transforms a modest 3.7-6V input from standard lithium batteries into an impressive 400kV output capable of producing dramatic electric arcs. Whether you're building a Tesla coil, conducting physics experiments, or creating an arc igniter, this module provides the raw high-voltage power you need in a remarkably compact form factor.\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"inline-flex\" aria-label=\"400kV High Voltage Generator 3-6V DC High Voltage Pulse Generator\" data-state=\"closed\"\u003e\u003cspan class=\"citation inline\" data-pplx-citation=\"\" data-pplx-citation-url=\"https:\/\/robocraze.com\/products\/40kv-high-voltage-generator-3-6v-dc-high-voltage-pulse-generator\" rel=\"nofollow noopener\"\u003e\u003ca rel=\"noopener\" class=\"inline-flex max-w-full min-w-0\" href=\"https:\/\/robocraze.com\/products\/40kv-high-voltage-generator-3-6v-dc-high-voltage-pulse-generator\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"group\/trigger inline-flex min-w-0\" data-state=\"closed\"\u003e\u003cspan class=\"citation inline-flex min-w-0\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e \u003c\/p\u003e\n\u003ch3 class=\"mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end font-editorial font-bold text-base first:mt-0\"\u003eHow This Solves Your High Voltage Challenges\u003c\/h3\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eTraditional high-voltage generation requires bulky transformers, complex circuits, and mains power connections. This module eliminates those barriers by delivering industrial-strength voltage from battery-powered sources you already own. The cylindrical design (56mm length × 24mm diameter) fits easily into portable projects, while the pre-wired input and output connections mean you can start experimenting immediately without complex soldering or circuit assembly.\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"group\/trigger inline-flex min-w-0\" data-state=\"closed\"\u003e\u003cspan class=\"citation inline-flex min-w-0\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"group\/trigger inline-flex min-w-0\" data-state=\"closed\"\u003e\u003cspan class=\"citation inline-flex min-w-0\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e \u003c\/p\u003e\n\u003ch3 class=\"mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end font-editorial font-bold text-base first:mt-0\"\u003eProfessional-Grade Performance in a Portable Package\u003c\/h3\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eThe module utilizes high-temperature silicone wiring designed specifically for high-voltage applications, ensuring safe energy transfer even during intense discharge events. With dual high-voltage output wires and clearly marked polarity on input leads (red positive, black\/green negative), integration into your projects is straightforward and foolproof. The bipolar discharge capability produces visible arcs ranging from 1-2cm depending on your power source, creating stunning visual effects for demonstrations or functional ignition systems.\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"inline-flex\" aria-label=\"New DC 3V-6V bis 400kV 400000V Boost Step up Power Module ...\" data-state=\"closed\"\u003e\u003cspan class=\"citation inline\" data-pplx-citation=\"\" data-pplx-citation-url=\"https:\/\/www.aliexpress.com\/item\/32755768779.html\" rel=\"nofollow noopener\"\u003e\u003ca rel=\"noopener\" class=\"inline-flex max-w-full min-w-0\" href=\"https:\/\/www.aliexpress.com\/item\/32755768779.html\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"inline-flex\" aria-label=\"Insane 400kV from Just 3V?! High Voltage Arc Generator Test!\" data-state=\"closed\"\u003e\u003cspan class=\"citation inline\" data-pplx-citation=\"\" data-pplx-citation-url=\"https:\/\/www.youtube.com\/watch?v=onjtRSYSNdE\" rel=\"nofollow noopener\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"group\/trigger inline-flex min-w-0\" data-state=\"closed\"\u003e\u003cspan class=\"citation inline-flex min-w-0\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e \u003c\/p\u003e\n\u003ch3 class=\"mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end font-editorial font-bold text-base first:mt-0\"\u003eOptimal Battery Compatibility\u003c\/h3\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eThis module performs best with 6V power sources, though it operates across the full 3.7-6V range. For maximum performance and sustained operation, use lithium batteries with capacity exceeding 2000mAh—ideally 4000mAh or higher. Single 3.7V cells work for basic experiments, while dual 18650 batteries in series (7.4V configuration) provide extended runtime, though voltage monitoring ensures you maintain optimal 6V operation during arc discharge.\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":43771234156695,"sku":"21PS001919","price":25.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/400kv-boost-converter-module-compact-design.jpg?v=1771493144"},{"product_id":"1-2-3-4-slot-type-c-battery-holder","title":"Type C Battery Holder with Wire Leads | 1-4 Slots for DIY STEM Projects","description":"\u003ch2 data-path-to-node=\"4\"\u003ePower Your Next Innovation with Unshakeable Reliability\u003c\/h2\u003e\n\u003cp data-path-to-node=\"5\"\u003eWhether you are prototyping a new IoT device, building an educational STEM robot, or repairing household electronics, stable power delivery is non-negotiable. Our \u003cb data-path-to-node=\"5\" data-index-in-node=\"163\"\u003eType C Battery Holder Storage Boxes\u003c\/b\u003e are precision-engineered to keep your batteries firmly in place, even in projects involving movement or vibration.\u003c\/p\u003e\n\u003cp data-path-to-node=\"5\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"6\"\u003eSeamless Integration for Makers and Engineers\u003c\/h3\u003e\n\u003cp data-path-to-node=\"7\"\u003eTime is your most valuable asset when bringing an idea to life. That is why these battery containers come pre-fitted with high-quality, color-coded wire leads (red for positive, black for negative). You can instantly solder them to PCB boards, breadboards, or microcontrollers without the tedious prep work. Designed for standard Size C batteries, these cases allow you to easily scale your voltage from a simple 1.5V circuit to a robust 6V power station.\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"8\"\u003eBuilt to Last, Designed to Perform\u003c\/h3\u003e\n\u003cp data-path-to-node=\"9\"\u003eCheap battery boxes often suffer from brittle plastics and weak contacts that cause voltage drops. Our battery holders are manufactured from impact-resistant ABS plastic, ensuring structural integrity during accidental drops. The high-tension, corrosion-resistant metallic springs guarantee maximum surface contact with the battery terminals. This minimizes electrical resistance and ensures that your Arduino boards, sensors, and LED arrays get the consistent power they demand.\u003c\/p\u003e\n\u003cp data-path-to-node=\"9\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"10\"\u003eConfigurable to Your Exact Voltage Needs\u003c\/h3\u003e\n\u003cp data-path-to-node=\"11\"\u003eEvery electronic project has unique power requirements. We offer four distinct configurations to match your specifications exactly:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"12,0,0\"\u003e\n\u003cb data-path-to-node=\"12,0,0\" data-index-in-node=\"0\"\u003e1-Slot:\u003c\/b\u003e Perfect for low-power, 1.5V single-component testing.\u003c\/li\u003e\n\u003cli data-path-to-node=\"12,1,0\"\u003e\n\u003cb data-path-to-node=\"12,1,0\" data-index-in-node=\"0\"\u003e2-Slot:\u003c\/b\u003e Delivers 3.0V, ideal for basic LED circuits and small DC motors.\u003c\/li\u003e\n\u003cli data-path-to-node=\"12,2,0\"\u003e\n\u003cb data-path-to-node=\"12,2,0\" data-index-in-node=\"0\"\u003e3-Slot:\u003c\/b\u003e Provides 4.5V, excellent for powering microcontrollers and logic boards.\u003c\/li\u003e\n\u003cli data-path-to-node=\"12,3,0\"\u003e\n\u003cb data-path-to-node=\"12,3,0\" data-index-in-node=\"0\"\u003e4-Slot:\u003c\/b\u003e Generates a full 6.0V, providing ample torque for servos, robotics, and complex sensor arrays.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"1 Slot","offer_id":43898222968983,"sku":"","price":5.0,"currency_code":"HKD","in_stock":true},{"title":"2 Slot","offer_id":43898223001751,"sku":"","price":6.0,"currency_code":"HKD","in_stock":true},{"title":"3 Slot","offer_id":43898223034519,"sku":"","price":7.0,"currency_code":"HKD","in_stock":true},{"title":"4 Slot","offer_id":43898223067287,"sku":"","price":8.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/size-c-battery-box-all-sizes-group.jpg?v=1776953294"},{"product_id":"1-8v-5v-dc-step-down-step-up-converter","title":"Mini 3.3V Step-Down \u0026 Step-Up DC-DC Converter Module 1.8V-5V","description":"\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003ePower up your low-voltage wireless modules and accessories efficiently with this mini 2-in-1 DC-DC Step-Down \u0026amp; Step-Up Converter. Designed to work with devices like ESP8266 WiFi, HC-05 Bluetooth, CC1101 wireless chips, and LED modules, it converts input voltages from 1.8V to 5V into a stable 3.3V output, ensuring reliability in your DIY and development projects.\u003c\/p\u003e\n\u003ch4 class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eFixed 3.3V ±4% regulated output for stable performance\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eWide input voltage: 1.8V - 5V DC\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eLong-term max output current: 100mA; short-term peak: 150mA\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eHigh efficiency, low noise, and short-circuit protection\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eNo-load input current: only 0.65mA\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eCompact design: 11mm x 7.62mm x 4.5mm (excluding pins), lightweight (approx. 0.5g)\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eBreadboard \u0026amp; MCU development-friendly 2.54mm pin pitch\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eApplications:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eESP8266 WiFi modules\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eHC-05, HC-06 Bluetooth modules\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eHC-11, HC-12 wireless UART modules\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eCC1101, CC2500, NRF24L01+ wireless chips\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eLow-power LED drivers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eUsage Tips:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eEnsure input voltage is within the 1.8V-5V range\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eDo not exceed 100mA output long-term, or 150mA short-term\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eInput power must exceed output power due to module power consumption\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eIdeal for powering IoT sensors, remote wireless modules, and battery-powered development boards where stable 3.3V DC is required.\u003c\/p\u003e\n\u003c!----\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":44226765521047,"sku":"21PS001260","price":15.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/3.3v-mini-step-up-down-converter-front-view.jpg?v=1763198369"},{"product_id":"3-3v-5v-0-5a-step-up-down-module","title":"S09 DC-DC Automatic Buck Boost Module 3.3V\/5V 0.6A (Input 2.5-15V)","description":"\u003ch4\u003e\u003cb\u003eOverview: S09 Auto Step Up\/Down DC-DC Power Module\u003c\/b\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cspan class=\"citation-11\"\u003eThe \u003c\/span\u003e\u003cb\u003e\u003cspan class=\"citation-11\"\u003eS09 DC-DC Automatic Buck Boost Power Module\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-11 citation-end-11\"\u003e provides a compact, highly stable, and cost-effective solution for regulating voltage in electronic projects.\u003csup class=\"superscript\" data-turn-source-index=\"1\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-10\"\u003eWhether your input voltage is above, below, or equal to your required output, this versatile step up\/down converter automatically adjusts to deliver a stable \u003c\/span\u003e\u003cb\u003e\u003cspan class=\"citation-10\"\u003e3.3V\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-10\"\u003e or \u003c\/span\u003e\u003cb\u003e\u003cspan class=\"citation-10\"\u003e5V\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-10\"\u003e (selectable) at up to \u003c\/span\u003e\u003cb\u003e\u003cspan class=\"citation-10\"\u003e0.6A\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-10 citation-end-10\"\u003e.\u003c\/span\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/h3\u003e\n\u003ch3\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"citation-9\"\u003eDesigned for wide voltage applications, the S09 accepts an input range of \u003c\/span\u003e\u003cb\u003e\u003cspan class=\"citation-9\"\u003e2.5V-15V\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-9 citation-end-9\"\u003e, making it perfect for battery-powered devices, Microcontroller (MCU) projects, and demanding industrial uses.\u003csup class=\"superscript\" data-turn-source-index=\"3\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-8\"\u003eIts high working frequency of \u003c\/span\u003e\u003cb\u003e\u003cspan class=\"citation-8\"\u003e1.2MHz\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-8 citation-end-8\"\u003e and premium industrial-grade components ensure low ripple and long-term, drift-free stability.\u003c\/span\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/h3\u003e\n\u003ch3\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cb\u003eKey Features \u0026amp; Technical Specifications\u003c\/b\u003e\u003c\/h4\u003e\n\u003cdiv class=\"horizontal-scroll-wrapper\"\u003e\n\u003cdiv class=\"table-block-component\"\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003cdiv class=\"table-block has-export-button\"\u003e\n\u003cdiv class=\"table-content not-end-of-paragraph\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003eFeature\u003c\/td\u003e\n\u003ctd\u003eSpecification\u003c\/td\u003e\n\u003ctd\u003eSEO Benefit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eModel\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eS09 Buck Boost DC-DC\u003c\/td\u003e\n\u003ctd\u003eHigh-Value Keyword\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eInput Voltage Range\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cb\u003e2.5V - 15V DC\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eWide input range for flexibility\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eOutput Voltage\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cb\u003e3.3V \/ 5V\u003c\/b\u003e (Fixed \u0026amp; Selectable)\u003c\/td\u003e\n\u003ctd\u003eCritical specification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eMax Output Current\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cb\u003e0.6A (600mA)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eClear power capability\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eHigh Efficiency\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mrel\"\u003e≈\u003c\/span\u003e\u003cspan class=\"mspace\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e75%\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eEssential performance metric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eSwitching Frequency\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cb\u003e1200 kHz (1.2MHz)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eIndicates low noise\/small size\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eQuiescent Current\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mrel\"\u003e\u0026lt;\u003c\/span\u003e\u003cspan class=\"mspace\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e200\u003c\/span\u003e\u003cspan class=\"mord mathnormal\"\u003eμ\u003c\/span\u003e\u003cspan class=\"mord text\"\u003e\u003cspan class=\"mord\"\u003eA\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eHighlight for battery applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eSize (Compact PCB)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e19\u003c\/span\u003e\u003cspan class=\"mord text\"\u003e\u003cspan class=\"mord\"\u003emm\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"mspace\"\u003e\u003c\/span\u003e\u003cspan class=\"mbin\"\u003e×\u003c\/span\u003e\u003cspan class=\"mspace\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e14\u003c\/span\u003e\u003cspan class=\"mord text\"\u003e\u003cspan class=\"mord\"\u003emm\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"mspace\"\u003e\u003c\/span\u003e\u003cspan class=\"mbin\"\u003e×\u003c\/span\u003e\u003cspan class=\"mspace\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e4.2\u003c\/span\u003e\u003cspan class=\"mord text\"\u003e\u003cspan class=\"mord\"\u003emm\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003ePerfect for space-constrained DIY PCB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eOperating Temp\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e−\u003c\/span\u003e\u003cspan class=\"mord\"\u003e2\u003c\/span\u003e\u003cspan class=\"mord\"\u003e0\u003cspan class=\"msupsub\"\u003e\u003cspan class=\"vlist-t\"\u003e\u003cspan class=\"vlist-r\"\u003e\u003cspan class=\"vlist\"\u003e\u003cspan class=\"\"\u003e\u003cspan class=\"pstrut\"\u003e\u003c\/span\u003e\u003cspan class=\"sizing reset-size6 size3 mtight\"\u003e\u003cspan class=\"mord mtight\"\u003e∘\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"mord text\"\u003e\u003cspan class=\"mord\"\u003eC\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e to \u003cspan class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan class=\"katex-html\" aria-hidden=\"true\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"strut\"\u003e\u003c\/span\u003e\u003cspan class=\"mord\"\u003e+\u003c\/span\u003e\u003cspan class=\"mord\"\u003e8\u003c\/span\u003e\u003cspan class=\"mord\"\u003e5\u003cspan class=\"msupsub\"\u003e\u003cspan class=\"vlist-t\"\u003e\u003cspan class=\"vlist-r\"\u003e\u003cspan class=\"vlist\"\u003e\u003cspan class=\"\"\u003e\u003cspan class=\"pstrut\"\u003e\u003c\/span\u003e\u003cspan class=\"sizing reset-size6 size3 mtight\"\u003e\u003cspan class=\"mord mtight\"\u003e∘\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"mord text\"\u003e\u003cspan class=\"mord\"\u003eC\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003eIndustrial-grade component quality\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eOther Features\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eShutdown Function, Current Cut-Off, Reflow Process\u003c\/td\u003e\n\u003ctd\u003eQuality and functionality\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-footer hide-from-message-actions ng-star-inserted\"\u003e\u003c\/div\u003e\n\u003c!----\u003e\n\u003c\/div\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cb\u003eIdeal Applications\u003c\/b\u003e\u003c\/h4\u003e\n\u003cp\u003eThis robust DC-DC voltage regulator is suited for a massive range of electronic DIY and professional uses:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eMicrocontroller Projects:\u003c\/b\u003e\u003cspan class=\"citation-7 citation-end-7\"\u003e Stable 3.3V\/5V power for Arduino, Raspberry Pi, ESP32, etc.\u003c\/span\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBattery-Powered Devices:\u003c\/b\u003e Maintain a constant output voltage regardless of battery drain (e.g., Li-ion 3.7V).\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eCommunications \u0026amp; Digital Radio Equipment\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eIndustrial Motherboards \u0026amp; Security Monitoring\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eModel Aircraft, Toys, and Household Electrical Appliances\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eAutomotive Power Supply \u0026amp; Field Collection\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"3.3V","offer_id":44228759322775,"sku":"","price":12.0,"currency_code":"HKD","in_stock":true},{"title":"5V","offer_id":44228759355543,"sku":"","price":12.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/s09-dc-dc-step-up-down-converter-angled-view.jpg?v=1758804216"},{"product_id":"3-aa-battery-holder-with-usb-female-socket","title":"3xAA Battery Holder with USB Power Output \u0026 Switch","description":"\u003cp\u003ePower your creative projects with ease! This versatile 3xAA battery holder is the perfect portable power solution for your DIY electronics, LED light kits, and more. Featuring a standard USB-A port, it eliminates the need for complex wiring, allowing you to directly power any 5V USB-compatible device.\u003c\/p\u003e\n\u003cp\u003eThe integrated on\/off switch is a crucial feature for safety and convenience. It allows you to easily cut power when the device is not in use, preventing battery drain and extending the life of both your batteries and your project.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKey Features:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eInstant USB Power:\u003c\/b\u003e Provides a stable 5V output through a standard USB-A female socket, perfect for powering a wide range of devices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eConvenient On\/Off Switch:\u003c\/b\u003e Easily control the power flow to your project, saving battery life and enhancing safety without needing to remove the batteries.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWide Compatibility:\u003c\/b\u003e An ideal power source for building block LED light kits, Arduino boards, microcontrollers, LED strips, toys, and other DIY electronic projects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurable \u0026amp; Compact:\u003c\/b\u003e Made from sturdy ABS plastic, this compact battery box is designed to be both lightweight and durable for any application.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eColor:\u003c\/b\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial:\u003c\/b\u003e ABS Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBattery Type:\u003c\/b\u003e 3 x AA Batteries (not included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOutput:\u003c\/b\u003e 5V USB-A\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSize:\u003c\/b\u003e Approximately 76mm x 51mm x 19mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-pagination: widow-orphan; background: white;\"\u003e\u003cspan lang=\"EN-US\"\u003eWide Application: It is also very suitable for Arduino boards microcontrollers, LED projects, toys and so on. It can also replace many damaged battery holders of electronic devices.\u003c\/span\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 11.5pt; font-family: 'Arial','sans-serif'; mso-fareast-font-family: 新細明體; color: #0f1111; mso-font-kerning: 0pt;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c!----\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":44462295187607,"sku":"21TS001713","price":10.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/angled-view-3xaa-usb-battery-box.jpg?v=1755287581"},{"product_id":"2-x-18650-battery-case-with-dc-plug-2-1mm","title":"7.4V Dual 18650 Battery Case with 2.1mm DC Plug - Power Bank \u0026 DIY","description":"\u003cp\u003eThis compact and versatile \u003cb\u003e7.4V Dual 18650 Battery Holder with 2.1mm DC Plug\u003c\/b\u003e is essential for powering your portable electronics, DIY projects, and custom power banks. Designed for two 18650 lithium-ion batteries \u003cb\u003e(2-cell series, 7.4V output)\u003c\/b\u003e, it provides a convenient and secure way to deliver reliable power.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKey Features:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eStable 7.4V Output:\u003c\/b\u003e Specifically designed for two 18650 lithium batteries in series, providing a stable 7.4V output to meet your project requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCompact \u0026amp; Portable:\u003c\/b\u003e Its small size (approx. 75mm x 40mm x 19mm) makes it ideal for integrating into various small appliances and on-the-go power solutions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVersatile Applications:\u003c\/b\u003e Perfect for Arduino projects, custom power banks, outdoor power needs, and a wide range of digital electronic devices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStandard DC Output:\u003c\/b\u003e Features a standard 5.5x2.1mm DC plug with a 14cm cable, ensuring broad compatibility with common power inputs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePower your innovations with this reliable 7.4V dual 18650 battery holder!\u003c\/p\u003e\n\u003c!----\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":44462355644567,"sku":"","price":12.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/18650-battery-holder-dc-connector.jpg?v=1754107789"},{"product_id":"5-5mm-x-2-1mm-power-jack-module-arduino","title":"DC-005 5.5x2.1mm Power Jack Adapter Board Module for Arduino DIY","description":"\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eThis DC power adapter board features a 5.5 x 2.1mm barrel jack connector, allowing convenient connection of standard DC power supplies to your electronics projects. Ideal for Arduino and robotics applications, this module simplifies power wiring for development boards, LED strips, and other devices. The board includes two VCC and two GND output pins to ensure flexible connections for your circuit, with sturdy PCB-mounting and compatibility for up to 30V input voltage. Each piece measures 2.5cm x 1.2cm and weighs approximately 3.2g, making it a space-saving and practical solution for hobbyists and engineers.\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" rel=\"nofollow noopener\" data-state=\"closed\"\u003e\u003ca rel=\"noopener\" class=\"inline\" href=\"https:\/\/electropeak.com\/dc-005-5-5mmx2-1mm-panel-mount-dc-power-jack\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0\"\u003eFeatures\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eCompatible with 5.5mm x 2.1mm DC power adapters.\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eDual VCC and GND interfaces for flexible wiring.\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eCompact, lightweight (3.2g), and durable PCB design.\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eSuitable for Arduino, LED strips, CCTV, and DIY electronics.\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eRated for up to DC 30V \/ 1A max load.\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" rel=\"nofollow noopener\" data-state=\"closed\" aria-label=\"Buy DC-005 5.5x2.1mm Female DC Power Jack Supply Socket ...\"\u003e\u003ca rel=\"noopener\" class=\"inline\" href=\"https:\/\/robu.in\/product\/dc-005-female-dc-power-jack-supply-socket-5-5x2-1mm\/\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0\"\u003eSpecifications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eConnector type: Barrel jack, 5.5mm outer, 2.1mm inner diameter.\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eBoard size: 2.5cm x 1.2cm.\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eOutput interfaces: 2 x VCC, 2 x GND.\u003c\/li\u003e\n\u003cli class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eWeight: 3.2g per piece.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":44497952473239,"sku":"21PS001324","price":5.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/dc-power-jack-module-5-5x2-1mm-connector-hero.jpg?v=1763013320"},{"product_id":"5v-12v-18650-battery-step-up-module","title":"18650 Battery Step-Up Module \u0026 Type-C UPS Power Supply (5V\/12V)","description":"\u003ch2 data-path-to-node=\"6\"\u003e\u003cb data-path-to-node=\"6\" data-index-in-node=\"0\"\u003eContinuous Power for Your Critical Electronics\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp data-path-to-node=\"6\"\u003ePower outages and unstable connections can ruin hours of hard work or disable vital security equipment. The \u003cb data-path-to-node=\"6\" data-index-in-node=\"155\"\u003e18650 Lithium Battery Charger \u0026amp; DC-DC Booster Converter\u003c\/b\u003e is engineered to eliminate power interruptions. By combining a high-efficiency boost circuit with intelligent UPS switching, this module ensures your devices stay online, automatically transitioning to battery power the millisecond the main Type-C input is cut off.\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"7\"\u003e\u003cb data-path-to-node=\"7\" data-index-in-node=\"0\"\u003eEngineered for Efficiency and Safety\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"7\"\u003eRunning high-drain devices requires stable, clean power. Equipped with a built-in 12A high-current MOS, this step-up board delivers a rated 15W (with peaks up to 20W) with an impressive 96% conversion efficiency. You are fully protected against the most common electrical faults. The onboard Battery Management System (BMS) actively guards against over-charging, over-discharging, over-temperature, and over-current scenarios, preserving the lifespan of your 18650 cells.\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"8\"\u003e\u003cb data-path-to-node=\"8\" data-index-in-node=\"0\"\u003eCustomizable for Advanced Engineering\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"8\"\u003eFlexibility is built into the design. Need to conserve every drop of power for a remote, off-grid IoT sensor? Simply desolder the output LED indicator to slash the static power consumption by over 10mA. Building a larger power bank? Easily wire multiple 18650 cells in parallel to scale your capacity without interfering with the UPS logic. Whether you are running a 5V microcomputer or a 12V CCTV camera, this compact module is the silent, reliable engine driving your project forward.\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"5V 2A Step Up Module","offer_id":44608662372503,"sku":"21PS002191-5V","price":45.0,"currency_code":"HKD","in_stock":true},{"title":"12V 1A Step Up Module","offer_id":44608662405271,"sku":"21PS002191-12V","price":48.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/18650-battery-step-up-module-front.jpg?v=1776177651"},{"product_id":"5v-2-channel-solid-state-relay-module-low-level-driver","title":"Multi-Voltage 2-Channel Solid State Relay Module for Arduino \u0026 More","description":"\u003cp\u003eEffortlessly control AC loads with our Multi-Voltage 2-Channel Solid State Relay Module. Available in 5V, 12V, and 24V versions, this low-level trigger relay is perfect for Arduino, Raspberry Pi, AVR, PIC, and other microcontrollers, providing reliable and silent switching for your projects.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKey Features:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eMulti-Voltage Options:\u003c\/b\u003e Choose from 5V, 12V, and 24V versions to suit your specific control circuit requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDual Channel Control:\u003c\/b\u003e Independently control two AC loads (up to 240V 2A each).\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSolid State Reliability:\u003c\/b\u003e Enjoy silent operation, longer lifespan, and faster switching speeds compared to mechanical relays.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eLow-Level Trigger:\u003c\/b\u003e Easy to integrate with your microcontrollers. The relay activates when the signal trigger terminal receives a low voltage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBuilt-in Safety:\u003c\/b\u003e Each output includes a resistive fuse (240V 2A) for enhanced protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCompact Design:\u003c\/b\u003e Measuring just 55mm x 33mm x 25mm, it's perfect for space-constrained applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eTechnical Specifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eOutput Load:\u003c\/b\u003e 240V AC, 2A per channel (resistive fuse protected)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDimensions (LWH):\u003c\/b\u003e 55mm x 33mm x 25mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eNet Weight:\u003c\/b\u003e 21.5g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eDetailed Specifications by Voltage Version:\u003c\/b\u003e\u003c\/p\u003e\n\u003cdiv class=\"horizontal-scroll-wrapper\"\u003e\n\u003cdiv class=\"table-block-component\"\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003cdiv class=\"table-block has-export-button\"\u003e\n\u003cdiv class=\"table-content not-end-of-paragraph\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eModel\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eInput Power\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eInput Control Signal Voltage (Low-Level Trigger ON)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eInput Control Signal Voltage (High-Level OFF)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cb\u003e5V Solid State Relay Module\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e5V DC\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e0-2.5V\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e3.3-5V\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cb\u003e12V Solid State Relay Module\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e12V DC\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e0-4.5V\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e5.5-12V\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cb\u003e24V Solid State Relay Module\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e24V DC\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e0-8.5V\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e5.5-12V\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-footer hide-from-message-actions ng-star-inserted\"\u003e\u003c\/div\u003e\n\u003c!----\u003e\n\u003c\/div\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cb\u003eModule Interface:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDC+:\u003c\/b\u003e Connect to the positive power supply (\u003cb\u003emust match the voltage of your chosen relay module\u003c\/b\u003e).\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDC-:\u003c\/b\u003e Connect to the negative power supply.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCH1:\u003c\/b\u003e Signal trigger terminal for Relay 1 (low-level trigger effective).\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCH2:\u003c\/b\u003e Signal trigger terminal for Relay 2 (low-level trigger effective).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eUnderstanding Low-Level Trigger:\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA \"low-level trigger\" means that the relay activates when the signal trigger terminal (CH1 or CH2) receives a voltage of 0V, or a voltage significantly lower than the positive power supply, close to the negative power supply. This is commonly achieved by connecting the trigger terminal to the ground (negative power supply) of your control circuit.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eApplications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHome automation\u003c\/li\u003e\n\u003cli\u003eRobotics\u003c\/li\u003e\n\u003cli\u003eIndustrial control\u003c\/li\u003e\n\u003cli\u003eDIY electronics projects\u003c\/li\u003e\n\u003cli\u003eControlling lights, motors, and other AC appliances\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eImportant Note:\u003c\/b\u003e Ensure your module's power supply (DC+ and DC-) voltage precisely matches the voltage of the relay module you have selected. Incorrect voltage can lead to module damage.\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"5V Relay Module","offer_id":44820768489623,"sku":"","price":20.0,"currency_code":"HKD","in_stock":true},{"title":"12V Relay Module","offer_id":44820768522391,"sku":"","price":20.0,"currency_code":"HKD","in_stock":true},{"title":"24V Relay Module","offer_id":44820768555159,"sku":"","price":20.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/solid-state-relay-2-channel-angled-view.jpg?v=1777557703"},{"product_id":"2pcs-21700-5000mah-lithium-battery","title":"2-Pack 21700 Battery 5000mAh 3.7V | High Capacity Rechargeable Cell","description":"\u003ch2 data-path-to-node=\"6\"\u003e\u003cb data-path-to-node=\"6\" data-index-in-node=\"0\"\u003eUnleash Uninterrupted Power for Your High-Drain Devices\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp data-path-to-node=\"6\"\u003eTired of your devices dying mid-task or constantly swapping out weak batteries? The modern tech landscape requires modern power solutions. Our \u003cb data-path-to-node=\"6\" data-index-in-node=\"199\"\u003e21700 5000mAh lithium battery\u003c\/b\u003e is engineered to provide maximum runtime and consistent output, bridging the gap between everyday electronics and professional-grade power requirements.\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"7\"\u003e\u003cb data-path-to-node=\"7\" data-index-in-node=\"0\"\u003eWhy Upgrade to the 21700 Cell?\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"7\"\u003eAs the new gold standard for high-performance electronics, the 21700 form factor offers a significant upgrade over traditional 18650 batteries. By utilizing a slightly larger casing (21.1mm x 70.5mm), these batteries pack a massive \u003cb data-path-to-node=\"7\" data-index-in-node=\"263\"\u003e5000mAh capacity\u003c\/b\u003e and 18.5Wh of energy. This means longer continuous operation for your power-hungry devices, reducing downtime and maximizing efficiency.\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"8\"\u003e\u003cb data-path-to-node=\"8\" data-index-in-node=\"0\"\u003eBuilt for Reliability and Performance\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"8\"\u003eWhether you are a DIY enthusiast running power tools in the workshop or a parent ensuring your child's electric ride-on car doesn't stall in the park, stability is key. These batteries deliver a steady \u003cb data-path-to-node=\"8\" data-index-in-node=\"240\"\u003e3.7V nominal voltage\u003c\/b\u003e, ensuring your motors run smoothly and your flashlights burn brightly without unexpected power drops.\u003c\/p\u003e\n\u003cp data-path-to-node=\"8\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"9\"\u003e\u003cb data-path-to-node=\"9\" data-index-in-node=\"0\"\u003eSafe, Rechargeable, and Eco-Friendly\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"9\"\u003eInvest in a sustainable power solution. These lithium-ion cells are designed for hundreds of recharge cycles, saving you money in the long run while reducing environmental waste. To ensure maximum longevity, simply avoid extreme temperatures and prevent over-discharging—giving you a dependable power source project after project.\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":44850469175447,"sku":"21BY000285","price":68.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/21700-rechargeable-battery-2pack.jpg?v=1775712154"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/collections\/power-relay-collection.png?v=1776355081","url":"https:\/\/scccltd.com\/en-tw\/collections\/power-and-relay.oembed?page=4","provider":"Sun Cheong Computer Company Limited","version":"1.0","type":"link"}