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The 1 CH Relay Module (5V) is a compact and reliable switching device designed for microcontroller-based automation projects. It allows low-power circuits like Arduino, Raspberry Pi, and ESP8266 to control high-voltage appliances such as lights, fans, and motors. With an onboard optocoupler for electrical isolation, it enhances safety and prevents damage to the microcontroller. The relay module supports both normally open (NO) and normally closed (NC) connections, providing flexibility for various switching applications. Its LED indicator provides real-time relay status updates, ensuring easy debugging and monitoring. Operating on a 5V DC input, it is energy-efficient and easy to integrate into embedded systems. This module is widely used in home automation, industrial control, and IoT applications, offering reliable and efficient performance.