Arduino Voltmeter

Arduino Voltmeter – Homemade DIY voltmeter

Hello world! Today i made a simple Arduino Voltmeter, It’s pretty easy to build and very handy if you don’t have one.. like me. I never used a multimeter in non of my projects lol. I should buy one! I needed to repair a laptop charger for a friend but i could not test it because all my laptops had different plugs, so i made this. Have fun with it! If you have a I2C on your LCD1602A, scroll to the bottom of the page, there is the code for those who use i2C.

Schematic:
Arduino Voltmeter
Just wire it up like the schematic, and it should work after uploading. You need to solder the resistors to a prototype board, or you can use a breadboard of course. It’s pretty easy to build. Good luck building your Arduino Voltmeter!

Parts list:
Arduino uno, i used the RobotDyn Uno. (has 8 analog pins)
LCD 1602
Breadboard or a PCB ProtoType Board.
10k Potentiometer.
5x 10k Resistor
2x 2.2k Resistor
Jumper wire set MM/FF/FM

Code:

I2C Code:

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