How to Use a Relay with a Raspberry Pi
What you'll need
A relay is an electrically-operated switch. These switches can be extremely useful for a variety of Raspberry Pi projects (think turning on a light or opening your garage door. Watch the video below to learn how to drive a relay using your Raspberry Pi.
1 – The video
The following video will show you how to wire up the relay to your Raspberry Pi.
2 – The test script
Here’s a copy of the test script used in the video:
#!/usr/bin/env python import time import RPi.GPIO as GPIO GPIO.setmode(GPIO.BCM) GPIO.setup(17, GPIO.OUT) GPIO.output(17, GPIO.LOW) time.sleep(0.25) GPIO.output(17, GPIO.HIGH) GPIO.cleanup()
To run the script, simply copy the code above to a file on your Raspberry Pi called test-relay.py (or whatever you want). And then run the script using: