Power & Relay
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5V 2.5A Universal AC/DC Power Adapter - 5.5x2.1mm DC Plug, UK
Regular price HK$40.00Regular priceSale price HK$40.00 -
9V Battery Holder Box with Cover and ON/OFF Switch
Regular price HK$8.00Regular priceSale price HK$8.00 -
Adjustable USB Power Supply Module with LED Display (1-24V)
Regular price HK$25.00Regular priceSale price HK$25.00 -
4A DC-DC Boost Converter Module with Voltmeter Display
Regular price HK$39.00Regular priceSale price HK$39.00 -
MP1584EN 3A Adjustable DC-DC Step-Down Buck Converter
Regular price HK$18.00Regular priceSale price HK$18.00 -
5V 2A Power Bank DIY Module | Type-C Li-ion Charge & Discharge Board
Regular price HK$10.00Regular priceSale price HK$10.00 -
9V Battery Snap Connector to Crocodile Clip Cable - 15cm
Regular price HK$6.00Regular priceSale price HK$6.00 -
5V Industrial Switching Power Supply (3A - 30A) | AC to DC Transformer
Regular price From HK$30.00Regular priceSale price From HK$30.00 -
12V Industrial Power Supply Unit (1A to 40A) | Reliable DC Transformer
Regular price From HK$19.00Regular priceSale price From HK$19.00 -
12V 3A AC/DC Power Adapter (UK Plug) | 5.5mm x 2.1mm
Regular price HK$88.00Regular priceSale price HK$88.00 -
12.6V 1.5A Li-ion Battery Charger (UK Plug) - 5.5mm x 2.1mm Tip
Regular price HK$45.00Regular priceSale price HK$45.00 -
Panasonic Hyper Manganese Battery (AA) - 4pcs
Regular price HK$5.00Regular priceSale price HK$5.00 -
10-Pack 18650 Battery Holder Bracket Spacers for DIY Battery Packs
Regular price HK$10.00Regular priceSale price HK$10.00 -
3A Type-C Lithium Battery Fast Charging Board - IP2312 High Efficiency
Regular price HK$15.00Regular priceSale price HK$15.00 -
3.7V 10000mAh LiPo Battery Rechargeable Polymer Cell (170x60x10mm)
Regular price HK$58.00Regular priceSale price HK$58.00 -
18650 UPS Battery Boost Charging Module - 5V 2A Lithium Charger
Regular price HK$45.00Regular priceSale price HK$45.00
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.