How to Use a Relay with a Raspberry Pi
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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:
python test-relay.py
