Description
Features
- Powered from 5V
- 2 channels
- Can be used as Normally Open (NO) or Normally Closed (NC)
- Optically isolated inputs
Getting started with the 2 Channel 5V Relay Module
In this guide you will set up the 2 channel relay module to control 2 LED’s .
Hardware required
- Arduino Uno
- 2 Channel 5V Relay Module
- Jumper wires
Connecting the Hardware
Upload the sample code
#define RELAY1 2
#define RELAY2 3
void setup()
{
pinMode(RELAY1, OUTPUT);
pinMode(RELAY2, OUTPUT);
}
void loop()
{
digitalWrite(RELAY1,LOW); // Turns ON Relays 1
delay(500); // Wait
digitalWrite(RELAY1,HIGH); // Turns Relay Off
digitalWrite(RELAY2,LOW); // Turns ON Relays 2
delay(500); // Wait
digitalWrite(RELAY2,HIGH); // Turns Relay Off
}
Testing the circuit
When a low level is supplied to signal terminal of the 2-channel relay, the LED at the output terminal will light up. Otherwise, it will turn off. If a periodic high and low level is supplied to the signal terminal, you can see the LED will cycle between on and off.
