Lesson 52: Controlling DC Motor using two relays | Arduino Step By Step Course

In this lesson we learn how to control a DC motor using two relays with Arduino.
there are two project codes provided. See link below.

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Download Arduino code for this video:

Use Chapters from timeline or click on the time
00:00 Introduction
04:27 How does it work
08:05 Wiring Explained
11:45 Basic Code Explained
15:25 Advanced code explained
18:40 Demonstration with two single relay
19:43 Demonstration with a dual relay module

Tutorial by Ahmad Shamshiri form Canada
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Power Supply I use:

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[alkaline_sine]

I'm doing this for an assignment and my professor did a terrible job of explaining relays. This helped me understand how they work much more clearly and finish my assignment on time. THANK YOU!!!

[ryanolivier]

This was incredibly helpful! Thank you!

[Bravo_Ventures_LLC]

Thank you thank you thank you! Was burning my brain trying to figure out the wiring using two relays to build a new controller for my sit/stand motorized desk. The easy solution would be a motor driver IC that handles the volts and amps, but Im using what I have on hand for now and my brain doesnt settle for easy. Still working on a setup where all signals are low (when not in use) coming from control board for energy efficiency and where neither the positive or negative is looping. Not much information is available on this topic. Glad I found your video like 3am so I could finally sleep. Funny thing is I had stumbled on this video before, discarded the fact on using relays because I want a compact design, was hoping to make a driver if I found a mosfet suitable in my stock, never saved the video completely forgot. But i need this project done, Thank you

[mashagreen-zvqg]

THANK YOU i am a beginner and try to control traffic light and a lego lift who i did build and this kinda video's are awesome to help to create something

[LonelyBird]

Can we take +2 and then -2 volts on same terminal using the same arrangements?

[febochestbox]

Finally you have lead me to this lesson, Infact I was already wired my project exactly like this lesson. But please correct if I am doing the right way. I have used a xy-gmos which you have presented recently applying the same logic. My question, can I use this motor driver along with relays to achieve CW/CCW rotation coming from xy-gmos output ?