The 1 Channel 5V Relay Module is a compact switching board designed for Arduino, Raspberry Pi, PIC, and other microcontroller projects. It allows you to safely control AC appliances or DC loads using a low-voltage signal. With its LED status indicator and optocoupler isolation, this relay ensures reliable and safe operation in home automation, robotics, and DIY electronics projects. Lightweight and easy to connect, it is widely used by students, hobbyists, and engineers in Bangladesh for small-scale switching tasks such as lights, fans, and motors.