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Product Description (Detailed):

The 12V 1 Channel Optocoupler Relay Module is an essential and versatile component for any electronics project that requires controlling a high-voltage or high-current device with a low-voltage microcontroller. This module is equipped with a robust relay that can switch loads up to 10A at 250V AC or 30V DC, making it suitable for a wide range of applications from controlling household appliances to switching powerful motors.

What sets this module apart is its integrated optocoupler (or opto-isolator). This critical component uses a beam of light to transmit the control signal, completely isolating the low-voltage side of the circuit (e.g., your Arduino or Raspberry Pi) from the high-voltage load. This galvanic isolation protects your sensitive and expensive microcontroller from destructive voltage spikes, noise, and short circuits, ensuring the safety and longevity of your project.

The module is designed for easy integration with a straightforward pinout. It requires a 12V DC power supply to energize the relay's coil and a single control pin (IN) that connects to a digital output on your microcontroller. The output side offers three convenient screw terminals: COM (Common), NO (Normally Open), and NC (Normally Closed), allowing you to configure the relay for different circuit behaviors. Whether you are building a home automation system to remotely switch lights, a smart irrigation system, or a robotics project, this optically isolated relay provides a reliable, secure, and user-friendly solution for all your DIY power control needs.

This 12V DC 1-Channel Relay Module is a reliable switching component that allows low-power microcontrollers to control high-voltage appliances and devices. It features a mechanical relay and optocoupler to provide safe and isolated signal transmission.

When connected to a microcontroller like Arduino or Raspberry Pi, the relay can be used to control bulbs, fans, pumps, and other devices. It is perfect for DIY electronics, IoT automation, and smart home systems.

Key Features:

• Single channel relay module supports AC (250V) and DC (30V) loads

• Compatible with Arduino, Raspberry Pi, ESP8266, ESP32, STM32

• Optocoupler isolation ensures stable signal transmission

• Includes status LED indicators for relay operation

• Ideal for home automation, smart appliances, and robotics

Technical Specifications:

How to Use with Arduino:

Wiring Diagram:

Sample Code:

int relay = 7;

void setup() {
  pinMode(relay, OUTPUT);
}

void loop() {
  digitalWrite(relay, HIGH); // Turn ON relay
  delay(2000);
  digitalWrite(relay, LOW);  // Turn OFF relay
  delay(2000);
}

Caution: Do not power the relay directly from Arduino's 5V pin. Use a 12V external power supply.

Applications:

• Smart home automation

• Controlling lights, fans, and pumps

• IoT and cloud-based appliances

• Safety systems and alarms

• Motor and solenoid actuation

Package Includes:

• 1 × 12V 1-Channel Relay Module