This is a 1-channel relay module designed to control high-voltage devices using a low-voltage microcontroller signal. It operates with a 5V trigger and features an optocoupler (optoisolator) for safe electrical isolation between the microcontroller and the high-voltage side, protecting both the circuit and the user. The relay can handle AC or DC loads, making it suitable for switching lights, fans, motors, and other appliances. An onboard LED indicator clearly displays the relay’s ON/OFF status, providing visual feedback during operation. All connections are made through screw terminals, allowing for secure, reliable, and tool-free wiring—ideal for both prototyping and permanent installations.
