Power & Relay
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3.7V 4000mAh 606090 Li-Po Rechargeable Battery (Bare Wires)
Regular price HK$35.00Regular priceSale price HK$35.00 -
3.7V 2000mAh Rechargeable LiPo Battery - 505060 (60x50x5mm) for DIY
Regular price HK$20.00Regular priceSale price HK$20.00 -
Mini 3.3V Step-Down & Step-Up DC-DC Converter Module 1.8V-5V
Regular price HK$15.00Regular priceSale price HK$15.00 -
DC 12V-24V to 5V 10A Step Down Power Converter Module (50W)
Regular price HK$99.00Regular priceSale price HK$99.00 -
MB-102 Breadboard Power Supply Module: 5V/3.3V Mini USB (Arduino)
Regular price HK$15.00Regular priceSale price HK$15.00 -
MB-102 Type-C Breadboard Power Supply Module
Regular price HK$25.00Regular priceSale price HK$25.00 -
Type C Battery Holder with Wire Leads | 1-4 Slots for DIY STEM Projects
Regular price From HK$5.00Regular priceSale price From HK$5.00 -
3xAA Battery Holder with USB Power Output & Switch
Regular price HK$10.00Regular priceSale price HK$10.00 -
12V Opto-Isolated Relay Module | 1/2/4/8 Channel High/Low Trigger
Regular price From HK$12.00Regular priceSale price From HK$12.00 -
USAMS US-SJ688 USB-A to Type-C 3A Fast Charging Cable (1m)
Regular price HK$19.00Regular priceSale price HK$19.00 -
MOSFET Electronic Switch Module | Optocoupler Isolated DC Control
Regular price HK$20.00Regular priceSale price HK$20.00 -
60cm USB to Alligator Clip Test Lead | Male/Female to Crocodile Clips
Regular price HK$10.00Regular priceSale price HK$10.00 -
JQX-13FF (HH62P) Flange Mount DPDT Relay | 10A 8-Pin
Regular price HK$25.00Regular priceSale price HK$25.00 -
6000mAh 3.7V Li-ion Battery Pack | 2-Pin Connector
Regular price HK$45.00Regular priceSale price HK$45.00 -
4000mAh 18650 Battery Pack | 5V Output with Type-C Male/Female
Regular price HK$59.00Regular priceSale price HK$59.00 -
12V Mini UPS Dual Power Switch Module | Auto Transfer Relay
Regular price HK$19.00Regular priceSale price HK$19.00
Collection: Power & Relay
Reliable Power Supply & Relay Modules for Electronic Projects
Explore 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.
Key Components for Your Circuit
- DC-DC Converters & Voltage Regulators: Efficient step-down (buck) and step-up (boost) modules for precise voltage control in complex setups.
- Relay Modules: Securely control high-voltage appliances using low-power microcontroller signals, perfectly compatible with Arduino and ESP32.
- Battery Solutions: A wide selection of 18650 LiPo batteries, safe BMS protection boards, and durable battery holders for portable power needs.
- Power Adapters: Stable AC to DC power supplies ensuring continuous and reliable device operation.
How to Choose the Right Power Component?
- Voltage Requirements: Ensure your step-down/step-up modules match the exact input and output voltage of your specific motherboard and peripherals.
- Current Rating (Amperage): Select power adapters and relays that can easily handle the maximum current load of your project to prevent overheating.
- Safety Features: When working with portable power, always opt for battery chargers and BMS modules with built-in overcharge and short-circuit protection.