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2 Channel Relay Module Relay Board Arduino Relay Module With Optocoupler

2 Channel Relay Module Relay Board Arduino Relay Module With Optocoupler

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🧲 2 Channel Relay Module with Optocoupler for Arduino, Raspberry Pi, AVR, ESP8266

βœ… Product Description

The 2 Channel Relay Module with Optocoupler is a compact, reliable switching solution for controlling AC or DC high voltage devices using low-power microcontrollers like Arduino, Raspberry Pi, AVR, STM32, and ESP8266.

Each relay is optically isolated to protect your microcontroller from voltage spikes and electrical noise. This module is ideal for home automation, robotics, and IoT projects where safe, reliable switching is essential.

✨ Key Features

  • πŸ”Œ 2-Channel Relay Switching: Control 2 independent devices (AC or DC)

  • πŸ›‘οΈ Optocoupler Isolation: Optical isolation between control circuit and relay β€” increases safety

  • ⚑ Relay Rating: Supports up to 10A at 250V AC / 10A at 30V DC

  • πŸ”„ Low-Level Trigger Input: Compatible with most microcontrollers (3.3V & 5V logic)

  • πŸ’‘ Status LEDs: Visual indicators for each relay’s on/off state

  • πŸ”§ Screw Terminals: Secure, easy connections for load wiring

  • πŸ“¦ Compact Size: Easy to integrate into any DIY project

πŸ“ Specifications

Parameter Value / Description
Relay Channels 2 (independent)
Input Voltage 5V DC
Trigger Voltage 3.3V – 5V (compatible with Arduino, etc.)
Relay Type Electromechanical, SPDT (Single Pole Double Throw)
Isolation Optocoupler per channel
Max AC Load 250V @ 10A
Max DC Load 30V @ 10A
Trigger Mode Low-level (active LOW)
Dimensions ~50mm x 40mm x 18mm
Mounting Holes Yes, for enclosure or panel mounting

πŸ”Œ How to Use the 2 Channel Relay Module with Arduino

πŸ”§ Wiring Instructions:

🟦 Relay Module Pins:

Pin Name Function
VCC Connect to 5V from Arduino
GND Connect to Ground
IN1 Control signal for Relay 1 (LOW = ON)
IN2 Control signal for Relay 2 (LOW = ON)

βš™οΈ Example Arduino Wiring:

Relay Module Arduino UNO
VCC 5V
GND GND
IN1 D7
IN2 D8

πŸ§ͺ Sample Code:

int relay1 = 7;
int relay2 = 8;void setup() {
pinMode(relay1, OUTPUT);
pinMode(relay2, OUTPUT);
}

void loop() {
digitalWrite(relay1, LOW); // Relay ON
digitalWrite(relay2, LOW);
delay(2000);

digitalWrite(relay1, HIGH); // Relay OFF
digitalWrite(relay2, HIGH);
delay(2000);
}

πŸ’‘ Tip: The relays are active LOW, so LOW = ON, HIGH = OFF.

🏠 Common Applications

  • Home automation (light, fan, heater control)

  • Smart appliances

  • Remote switch control (via IoT)

  • Security systems

  • Industrial automation

  • Robotics and DIY electronics projects

πŸ“¦ What's Included

  • 1 Γ— 2-Channel 5V Relay Module with Optocouplers

  • 1 Γ— Quick reference pinout guide (optional)

⚠️ Safety Tips

  • Disconnect power when wiring AC loads

  • Use external power supply if driving high-current devices

  • Ensure common ground between relay module and microcontroller

  • Use proper insulation for mains wiring

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