The 1-Channel Relay Module (Small Type) is a compact and efficient switching module designed to control high-voltage AC or DC devices using low-voltage signals from microcontrollers like Arduino.

Available in 5V and 12V variants, this module features a single relay channel capable of switching loads such as lights, fans, motors, and appliances. Its small size makes it ideal for space-constrained projects.

The module includes transistor driving circuitry and often an optocoupler (variant dependent) for improved isolation and reliability. It supports digital input signals and is easy to integrate into automation and IoT systems.