5V Relay (Raspberry Pi)

Basic tutorial of how to setup a 5V Relay with the Raspberry Pi.

Step 1: Parts

RPI 3 - https://amzn.to/2VA9pQY

4 Amp Power Adapter - https://amzn.to/2CTptWu

16GB micro SD - https://amzn.to/2SFMwd3

120 pcs jumper cable: https://ebay.to/2VAb9cY

5 Volt Relays: https://amzn.to/2SYHxnH

12 Volt Power Supply - https://amzn.to/2srHmWv

5.5x2.1mm Male+Female DC Power Socket: https://amzn.to/2VA5ZNW

Step 2: Setup

VCC -> 5 volt pin

GND -> Ground pin

IN -> GPIO 21

*Ensure postive leads are hooked up to NO and C terminals

Step 3: Code

1. Copy Script to Raspberry Pi

2. Type "python relay.py" to run

Step 4: Additional Info

Online Guide: https://www.piddlerintheroot.com/5v-relay/

Comments

[ibrahimtheo914]

I wrote the code directly into python and did your steps and it says NameError: name '_name_' is not defined

[nadir.kiyanclar]

You need ‘__name__’ (two underscores before and after)

[DilithiumC]

I connected a 5v relay to raspberry-pi 3b+, 12v peristaltic pump and 12v Li-ion battery. And the pump works but my question is can the 5v relay handle this or should I get a 12v relay.

[ibrahimtheo914]

its max is 250vac 10a or 125vac 15a

[maxwega]

nice project. will like to try it. can we use the relay as a regular switch. i mean here you are using it with 12 volts DC power supply and motor, what if i want to use it with a regular light bulb and mains power supply. will it support or blow up.

[ibrahimtheo914]

it will work

[KonstantinosT10]

I have got a 5v relay (https://www.amazon.de/gp/product/B0057OC5WK/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1) but as soon as i set the GPIO.setup(7, GPIO.OUT) the relay clicks and closes the circuit. toggling the output to HIGH or LOW has no effect on the relay. My relay is connected to the 5v pin of my PSpi 3 model b. When I try the 3.3v pin i get a red led on the relay board and nothing happens. Should I start looking for another relay board? :(