1-Channel Relay Module

The 1-Channel Relay Module is a widely used electronic switching module that allows low-voltage control signals from microcontrollers to safely operate high-voltage or high-current devices. It acts as an interface between control circuits (such as Arduino, Raspberry Pi, ESP32, or other microcontrollers) and external electrical loads like lights, fans, motors, pumps, or appliances.

This module uses an electromechanical relay to physically switch the connected load ON or OFF, providing excellent electrical isolation between the low-voltage control side and the high-voltage load side. Because of this isolation, sensitive microcontroller circuits are protected from voltage spikes, noise, and potential damage caused by high-power devices.

The relay module is designed for easy integration into DIY electronics, automation systems, and IoT projects. With clearly labeled pins, onboard indicator LED, and optional optocoupler isolation, it is suitable for beginners as well as advanced users. The module can be triggered using a simple digital HIGH or LOW signal, depending on the design, making it very flexible for different control logics.

Key Features:
This module supports a single relay channel for controlling one electrical load. It is available in different control voltage variants such as 5V or 12V, depending on the model. The relay typically supports loads up to 10A at 250VAC or 10A at 30VDC, making it suitable for most household and industrial applications. It accepts TTL-level trigger signals directly from microcontrollers and includes optocoupler isolation for improved safety. An onboard LED indicator provides a clear visual status of the relay operation.

Package Includes:
The package contains one 1-Channel Relay Module along with a user manual or basic documentation, depending on availability.

Applications:
The 1-Channel Relay Module is commonly used in home automation systems to control lights and appliances, robotics projects for motor or actuator control, DIY electronics experiments, IoT-based remote switching systems, smart power control applications, and educational projects for learning automation and embedded systems.