5V Relay (Raspberry Pi)

by piddlerintheroot

66K5416

Intro: 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/

8 Comments

StillnetMaker 6 weeks ago

So how exactly do you power a 5v relay with a 3.3v gpio pin? I didn't see the answer on this page or the linked source site. Do I have to watch the 10 minute video to get the answer? Can someone just tell me?

ibrahimtheo914 4 years ago

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

nadir.kiyanclar 4 years ago

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

DilithiumC 5 years ago

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.

maxwega 6 years ago

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.