Relay (single channel)

A single-channel relay module is an electronic switching device used to control a high-voltage or high-current electrical load using a low-voltage control signal from a microcontroller such as Arduino. It contains one relay channel that can be used to switch devices such as lights, motors, fans, pumps, and other electrical appliances. The relay provides electrical isolation between the control circuit and the load circuit, making it useful in automation and robotics projects. It is commonly controlled through a digital output pin of an Arduino or similar development board.