5V 1-Channel Relay Module

The 5V 1-Channel Relay Module is a compact and reliable switching module designed to control high-voltage AC or DC electrical loads using low-voltage digital signals from microcontrollers and development boards. It enables safe isolation between the control circuit and the load, making it ideal for home automation, industrial control, robotics, IoT systems, and DIY electronics projects.

The module is equipped with a 5V electromagnetic relay capable of switching a wide range of electrical devices such as lights, fans, pumps, motors, solenoids, and other appliances. It accepts a 5V DC control signal from microcontrollers and uses an onboard transistor driver to energize the relay coil. The relay provides Normally Open (NO), Normally Closed (NC), and Common (COM) terminals, allowing flexible control of connected loads.

Built with an onboard LED status indicator, transistor driver circuit, and flyback protection diode, the module ensures stable and reliable operation while protecting the control circuitry from voltage spikes generated by the relay coil. The relay contacts are electrically isolated from the low-voltage control side, improving safety when switching mains-powered equipment.

The 5V 1-Channel Relay Module is fully compatible with Arduino, ESP32, ESP8266, Raspberry Pi, STM32, PIC, AVR, 8051, and other microcontroller platforms. Its standard pin headers and screw terminal connectors allow quick wiring and easy integration into electronic projects.

The module is widely used in home automation systems, industrial automation, smart agriculture, security systems, remote switching, IoT devices, robotics, lighting control, motor control, appliance automation, educational laboratories, and DIY electronics projects. It is an excellent choice for students, hobbyists, engineers, and developers requiring reliable switching of high-power electrical loads.

Features

• Single-channel 5V relay module

• Operating voltage: 5V DC

• Controls AC and DC electrical loads

• Relay output terminals: NO, NC, and COM

• Onboard transistor driver circuit

• Built-in flyback protection diode

• LED power and relay status indicators

• Electrical isolation between control and load circuits

• Standard screw terminals for easy wiring

• Compact PCB design

• Easy interfacing with Arduino, ESP32, Raspberry Pi, and other microcontrollers

• Stable and reliable switching performance

Applications

• Home automation systems

• Smart lighting control

• Fan and pump control

• Motor switching

• Appliance automation

• Industrial automation

• Smart agriculture

• IoT projects

• Robotics and embedded systems

• Security and alarm systems

• Remote electrical switching

• Arduino projects

• ESP32 and Raspberry Pi development

• Educational STEM projects

• Laboratory experiments

• DIY electronics and automation projects