How to make a (0-30) volt digital voltmeter using Arduino | Arduino project

In this video, I've explained how to make a voltmeter using Arduino. Here, I've used 16x2 LCD display and also one potentiometer for calibration to get nearly accurate readings. The range of the voltmeter is 0 to 30 volt.

Download link for the program:

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[superboyshubham]

Please explain this for 0-100 volt input

[abegafouda]

Excellent! Friend. Exactely what I was looking for. And nicely explained, with extreme precision and simplicity. Thank you. Now, million dollar questions. 1) How do I do the same WITHOUT ARDUINO, with current components (like LM324)? And 2) How to turn this from thermometer to VOLTAGE DISPLAY (for a solar panel or battery for instance)? Maybe a dedicated video Thanks for good inspiration. I send you PRANA for success and wealth.

[shripadhegde]

Exactly what i was looking for... Thank you bro...

[nickemild.barbas]

Thank you! Great video.

Can this be used for detecting voltage in electrified water? Thank you

[rakeshbchoudhary]

What is the code use brother and the logic scale conversion used ?

[indrajatiantonio]

Well done! Please combine with dfplayer, would you?

[omkarkhade]

Nice explanation 👍

But why the voltage displayed on the LCD is fluctuating little bit?
Is it due to the power supplied to the 10 bit ADC of arduino?
Or do we need more precision in ADC, 12 or 16 bit?

[industron]

CAN WE MEASURE THE VOLTAGE OF INVERTER BATTERY OF 150MAH .PLZ REPLY SOON.

[learningpower]

Very good video!!! I downloaded your code...and few comments...you did only a single measurement of the voltage....I will suggest to average around 500 points... The second points that I will make... is that there is a strong debate as if the divider from the analog conversion should be 1023 or 1024...but since you are calibrating...I guess that will not be a problem. Keep the good Work!!!

[republicoftutorials]

Great but it bouncing a lot and not very accurate, i have the same problem do you know how to get rid of those bouncing

[BilloBob]

thank you for this you really helped out exactly what i was looking for :)

[Gw]

Can u help me..
I see voltage measures fine, but When I put 12V, it detects like 12.00V, 12.06V, 12.12V this
this chnages alot and IDK what to do.

[stefko]

Hello. Can you help me out, I have problem with uploading the code to my Arduino nano every. PLEASE!! PLEASE!! PLEASE!!

[AsifAhmed-sohl]

Sir is ki program kese Karen ge please help

[devilvortex]

How many amps I can connect to the input?