2-Channel 5V Relay Module for Arduino & Pi

🔥 What is a 2-Channel 5V Relay Module?

The 2-Channel 5V Relay Module is a compact and essential component for any electronics enthusiast, maker, or professional who wants to control high-voltage devices using low-voltage microcontrollers like Arduino, ESP32, or Raspberry Pi. This module lets you switch AC appliances, lights, motors, pumps, and other high-power devices with your 5V logic circuits.

✅ Key Features of the 2-Channel 5V Relay Module

• High Compatibility: Works seamlessly with Arduino, ESP32, NodeMCU, STM32, Raspberry Pi, and other 5V microcontrollers.

• Optocoupler Isolation: Provides electrical isolation between your control circuit and the high-voltage side, ensuring safety.

• LED Indicators: Clear visual feedback with onboard LEDs showing relay activation.

• Strong Relays: Each relay supports up to 10A @ 250V AC or 10A @ 30V DC.

• Easy Wiring: Screw terminals for relay outputs and pin headers for control signals.

⚙️ Specifications

• Operating Voltage: 5V DC

• Relay Channels: 2

• Relay Model: SRD-05VDC-SL-C

• Maximum Switching Current: 10A

• Maximum Switching Voltage: 250V AC / 30V DC

• Control Pins: IN1, IN2, GND, VCC

• Board Dimensions: ~50mm x 40mm

• How to Use the 2-Channel 5V Relay Module with Arduino

  1. Connect VCC and GND to the 5V and GND pins of Arduino.

  2. Connect IN1 and IN2 to your chosen Arduino digital pins.

  3. Upload a simple digitalWrite sketch to control relays:

     code:

     void setup() {
       pinMode(8, OUTPUT);  // IN1
       pinMode(9, OUTPUT);  // IN2
     }
     
     void loop() {
       digitalWrite(8, HIGH); // Turn ON Relay 1
       delay(1000);
       digitalWrite(8, LOW);  // Turn OFF Relay 1
       delay(1000);
     }
     

  4. The relay’s NO/NC/COM screw terminals connect to your AC/DC appliances.

  ---

  💡 Applications of 2-Channel 5V Relay Module

  • Home automation systems

  • Smart switches for lights and fans

  • Industrial equipment control

  • DIY electronics and robotics

  • IoT projects

    ✅ Internal Link:

    Buy Arduino UNO R3 with USB Cable – Perfect companion board for controlling this relay module.

    ✅ External Link:

    Watch: How to Use Relays with Arduino – Quick video tutorial to get started.