How To Connect

connection_diagram
  • Connect 3.3V pin of Raspberry Pi to VCC pin of Relay.
  • Connect GND pin of Raspberry Pi to GND of Relay.
  • Connect GPIO 21 of Raspberry Pi to Input pin of Relay.
  • Connect COM (Common pin) of Relay to +ve Voltage source of Battery.
  • Connect NO (Normally Open) pin of Relay to +ve terminal of DC motor.
  • Connect -ve of Voltage source of Battery to -ve terminal of DC motor.

Connection Logs

    Raspberry Pi
    Relay
    DC Motor
    9V Battery
    CONNECTOR INFO 
        import RPi.GPIO as GPIO
    import time
    
    # Set up GPIO
    GPIO.setmode(GPIO.BCM)
    relay_pin = 21
    GPIO.setup(relay_pin, GPIO.OUT)
    
    # Function to turn on the motor
    def turn_on_motor():
        GPIO.output(relay_pin, GPIO.HIGH)
        print("Motor ON")
    
    # Function to turn off the motor
    def turn_off_motor():
        GPIO.output(relay_pin, GPIO.LOW)
        print("Motor OFF")
    
    try:
        # Main loop
        while True:
            turn_on_motor()
            time.sleep(1)  # Run the motor
            turn_off_motor()
            time.sleep(2)  # Wait before turning on again
    except KeyboardInterrupt:
        # Clean up GPIO on keyboard interrupt
        GPIO.cleanup()