Power & Relay
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CR2032 Battery Holder Case with Switch & Leads | 3V/6V DIY Power
Regular price HK$5.00Regular priceSale price HK$5.00 -
2S 7.4V 15A Lithium Battery Protection Board (BMS) | 18650 Safe Guard
Regular price HK$15.00Regular priceSale price HK$15.00 -
5.5mm x 2.1mm DC Female to 2Pin Lithium Battery Charging Cable
Regular price HK$15.00Regular priceSale price HK$15.00 -
2-Pack 21700 Battery 5000mAh 3.7V | High Capacity Rechargeable Cell
Regular price HK$68.00Regular priceSale price HK$68.00 -
21700 Battery Holder - Single, Dual, and Triple Slot Options
Regular price From HK$10.00Regular priceSale price From HK$10.00 -
Adjustable 3.7V Lithium Battery Boost Charger Module (5-27V Output)
Regular price HK$20.00Regular priceSale price HK$20.00 -
18650 Battery Step-Up Module & Type-C UPS Power Supply (5V/12V)
Regular price From HK$45.00Regular priceSale price From HK$45.00 -
High-Efficiency DC 9-36V to 5V 3A Dual USB Buck Converter Module
Regular price HK$25.00Regular priceSale price HK$25.00 -
DC-DC Buck Converter 17-65V to 12V 8A 96W Step-Down Voltage Regulator
Regular price HK$55.00Regular priceSale price HK$55.00 -
DC-DC Auto Buck-Boost Converter Module (3.3V / 5V Output)
Regular price HK$12.00Regular priceSale price HK$12.00 -
4-Channel USB QC3.0 Fast Charging Step-Down Module | 6-32V to 24W
Regular price HK$69.00Regular priceSale price HK$69.00 -
ZMPT101B AC Voltage Sensor Module for Arduino (0-250V AC)
Regular price HK$25.00Regular priceSale price HK$25.00 -
DC 0-25V Voltage Sensor Module (Resistive Divider) for Arduino
Regular price HK$10.00Regular priceSale price HK$10.00 -
1-8S Lipo Battery Voltage Tester & Low Voltage Buzzer Alarm
Regular price HK$25.00Regular priceSale price HK$25.00 -
MPPT Solar Power Management Module (6V-24V) - 3.7V Li-ion Charger
Regular price HK$120.00Regular priceSale price HK$120.00 -
5pcs L7805CV 7805 5V 1.5A Linear Voltage Regulator for Arduino
Regular price HK$25.00Regular priceSale price HK$25.00
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.