Hi there! Welcome to the somewhat crazy world of relays, motors, electronics, and best of all... RASPBERRY PI!.

I know some of you people don't know anything about raspberry pi, but some of you didn't even know it existed! In case you don't know what it is, click HERE!. Now that all of you are up to speed, LETS GET TO IT! (If you watch my YouTube videos (@Computer Kid), these words are very familiar to you!). If you're interested in laser etching stuff be sure to visit my Facebook page!

Supplies

1. Raspberry Pi (2b and newer to avoid screaming at the pi because of how slow the earlier models are;-)

2. Relay (I used a SRD-05VDC-SL-C))

3. Motor

4. Battery Holder

5. Female To Female Jumper Wires

Step 1: Hook the Relay Up to the Raspberry Pi

+ goes to 5V.

- goes to GND.

S goes to GPIO18

Step 2: Hook Up the Motor to the Relay

Hook the negative directly up to the motor, positive up to the center of the relay, then finally the left side of the relay to the positive of the motor.

Step 3: Code It!!

#to create this file type in the terminal sudo nano relay.py
#to run this file run in the terminal python3 relay.py


import RPi.GPIO as GPIO
from time import sleep


GPIO.setmode(GPIO.BCM)
GPIO.setup(18, GPIO.OUT)


while True:
 GPIO.output(18, True)
 sleep(1)
 GPIO.output(18, False)
 sleep(1)