One Channel Relay Shield Module For Microcontrollers 5V 3Pc Pack With LED Indicator Light DIY Friendly Compatible With Popular Microcontroller Boards R3 Mega 2560 Raspberry Pi Pico STM32 AVR PIC ARM MCU DSP Home Automation Projects

5V Single-Channel Relay Shield 3-Pack for Microcontrollers
✔️ 3x 5V relay modules, TTL control, 5V-12V input, 220V AC load

This 3-pack delivers three single-channel 5V relay shield modules designed for microcontroller projects. Each module switches AC loads up to 220V and can be driven by TTL signals from boards like Arduino R3, Mega 2560, Raspberry Pi Pico, STM32, AVR, PIC, or ARM MCUs. The kit includes three identical units with power and control LEDs for quick status checks, making it ideal for home automation and DIY appliance control.

✅ 1 channel per module
✅ 5V coil relay, TTL 5V-12V input
✅ Control signals with pull-down to prevent false triggering
✅ 220V AC load switching with normally open and normally closed contacts
✅ Power and control LED indicators for quick status
✅ Pack size: 3 modules in a pack

💡 What is a relay module used for in microcontroller projects? This handy guide covers how these boards help control mains-voltage devices from low-voltage microcontroller signals. - Handy for turning on/off lights, heaters, motors from a microcontroller - Keeps control side isolated from load side for safety - Easy to wire to Arduino, Raspberry Pi, or similar platforms