The optocoupler provides electrical isolation between the input and output circuits, ensuring safe and reliable operation.
| Low-Voltage Control | The module can be controlled using a low-voltage digital signal from a microcontroller or other device, typically 3.3V or 5V. |
| High-Voltage and High-Current Capability | The relay can handle high-voltage and high-current devices, making it suitable for a wide range of applications. |
The module is compact and lightweight, making it ideal for use in space-constrained applications.
The module has a simple and intuitive interface, making it easy to integrate into a wide range of projects and applications.
| + Contact Rating | 10A/12V DC |
| + Coil Voltage | 12V DC |
| + Coil Current | 80mA |
| + Switching Time | 10ms (max) |
-40C to 85C
Applications
| The 1 Channel 12V Relay Module with Optocoupler is widely used in various IoT projects and applications, including |
Home automation systems
Industrial control systems
Robotics and robotic arms
HVAC systems
Lighting control systems
Motor control systems
Solenoid valve control systems
Pinout and Dimensions
| The module's pinout and dimensions are as follows |
| + VCC | Power input (12V) |
| + GND | Ground |
| + IN | Input signal (low-voltage digital signal) |
| + NO | Normally Open contact |
| + NC | Normally Closed contact |
| + COM | Common contact |
45mm x 25mm x 18mm (L x W x H)
Conclusion
The 1 Channel 12V Relay Module with Optocoupler is a versatile and reliable IoT component designed to control high-voltage or high-current devices using a low-voltage digital signal. Its compact size, easy-to-use interface, and robust electrical isolation make it an ideal choice for a wide range of projects and applications.
1 Channel 12V Relay Module with Optocoupler DocumentationOverviewThe 1 Channel 12V Relay Module with Optocoupler is a popular IoT component used to control high-voltage devices (up to 12V) using a microcontroller or other low-voltage devices. The optocoupler provides electrical isolation between the input signal and the relay, ensuring safe and reliable operation.PinoutVCC: 5V power supply
GND: Ground
IN: Signal input (active low)
Relay Output: Normally Open (NO), Normally Closed (NC), and Common (COM)Technical SpecificationsRelay type: SPST (Single Pole Single Throw)
Rated voltage: 12V
Rated current: 10A
Operating frequency: 50/60Hz
Optocoupler isolation voltage: 5KVCode Examples### Example 1: Controlling a Light Bulb using ArduinoIn this example, we'll use an Arduino Uno board to control a light bulb connected to the relay module.```cpp
const int relayPin = 2; // Choose a digital pin on your Arduino boardvoid setup() {
pinMode(relayPin, OUTPUT);
}void loop() {
digitalWrite(relayPin, LOW); // Turn the relay ON (light bulb turns ON)
delay(1000);
digitalWrite(relayPin, HIGH); // Turn the relay OFF (light bulb turns OFF)
delay(1000);
}
```### Example 2: Controlling a DC Motor using Raspberry Pi (Python)In this example, we'll use a Raspberry Pi to control a DC motor connected to the relay module.```python
import RPi.GPIO as GPIO
import time# Set up GPIO mode
GPIO.setmode(GPIO.BCM)# Set the relay pin as output
relay_pin = 17
GPIO.setup(relay_pin, GPIO.OUT)try:
while True:
GPIO.output(relay_pin, GPIO.LOW) # Turn the relay ON (motor turns ON)
time.sleep(1)
GPIO.output(relay_pin, GPIO.HIGH) # Turn the relay OFF (motor turns OFF)
time.sleep(1)except KeyboardInterrupt:
GPIO.cleanup()
```Important NotesMake sure to connect the relay module to a suitable power supply and ensure the voltage rating is not exceeded.
Use proper electrical isolation and safety precautions when working with high-voltage devices.
The relay module can be used with other microcontrollers or development boards, such as ESP32, ESP8266, or STM32, with minor modifications to the code.