Lesson 68, Home Automation: How to control 16 Channel Relay module using Arduino control 16 AC loads

This video shows how to control 16 AC or DC load using the 16 Channel Relay and Arduino. This a great home automation project.

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Download Arduino code for this video:

Go directly to different section of this video:
00:00 Introduction
01:22 Hardware explained
05:40 load calculation
06:47 Design flaw in the module (must see)
08:46 Code is explained
14:20 Demonstration

Tutorial by Ahmad Shamshiri form Canada
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[polako]

The explanation about the board is better than any other thing you can find online! Thank you!

[akarshsachdeva]

Thank you very much for explaining the 5V and GND connection with arduino. I was so confused with the common ground problem.

[leochen]

I can watch the relays on and off all day.

[mustaphaalaoui]

Thank you very much for this excellent tutorial and video.

[kakleerko]

Iam watching your video from India your explanation is very nice 👍

[asab]

A really excellent tutorial. Thank you so much for posting this.

[edwinhdz]

I could sleep with the sound of this relays

[nastuhi]

thank you so much you saved my life with that one

[nikitaKaner]

Thank you for the explanation! You saved me! :)

[darshanlokesh]

Excellent Explanation in YouTube... So far on this topic

[QuickMind]

you should do this 16 relay board being controlled by Arduino and the Nextion Touch Screen with 16 digital buttons :)

[dandrion]

Thank you very much Sir for the informative video tutorial. Helps a lot.

[brasofilo]

Very good stuff, great explanation and production values, thanks a lot for sharing!

[driftwood]

Brilliant video RJ. A big thank you for all your uploads, really appreciate these tutorials. Have watched a few now and the detail you go into and the helpful information you provide is very much appreciated.

A new like and a new sub here.

[sgundil]

Most helpful video. Excellent explanation. Thank you.
In case I do not want a continuous loop but only want to use for sequential delay so that the relays remain ON continuously after a certain time, what would be the code?

[dennishamilton]

Amazing video! This might seem like a stupid/obvious question but can you decide how many Watts/Amps/Voltage your relays output. For example if I only want to output 9V at 1A per relay would that be possible or no?

[jimmyjimmy]

Hi, great video!!! I done your project in few minutes. I need a different function. I want to switch on (for 200-400 ms ) one by one all the relay. So, first relay on for 200ms then off, second relay on for 200ms then off... up to the 16th relay. I'm not native language english so if is not clear I will try to explain it better. Thank you

[Elettronica-xtnm]

Beautiful, beautiful, the video as always very constructive your tutorials. Speaking of 16 relays, instead could you make a video tutorial to manage the relays with the MCP23017 component that uses only the I2C mode is I able to have more free ports of Arduino? Thank you very much for the attention .

[alejandrominder]

Thank you for the nice video. But something is wrong. With shift registers you could control as many boards as you want. Means you could use smaller Arduinos too. Even an AtTiny could do the job.

[chowbrian]

Thank you for the informative video, I am relatively new to Arduino and I have a question, why is the Vin pin used as ground rather than the GND pin?