Introduction: A Simple Voltmeter

This project was developed using OLED 128X64 LED Display 12C interface in conjunction with an Arduino Uno for measuring voltage. For uploading the code, go to the following website:

Step 1: Bill of Materials

Picture of Bill of Materials

1 Arduino Uno R3

1 12C OLED 128X64 Display

1 Header of 40-pin

1 5cm X 7cm PCB

2 Wire jumpers for Arduino

1 12 in Heat Shrink tube (any color)

Step 2: Schematic

Picture of Schematic

Follow step by step the diagram of your project so that you can complete it successfully. All of instructions are in this schematic and the indications are very clear so that you can undertand it and so you can do a great project because with this project, you could be measuring until 50V without problem.

Step 3: Complete Step by Step

Picture of Complete Step by Step

Following your schematic, complete step by step correctly before uploading the code.

Step 4: Uploading the Code

Picture of Uploading the Code

Now, it's time of uploading your code so that you can enjoy this interesting project. Then, remember to visit the following website:


RichW36 made it! (author)2017-11-22

I did this with a Nano and it works great! I am adding this to a power supply project i am working on. Thanks!

ManishGoyal99 (author)2017-05-08

can you give the link of code in .ino extension

quasidordux (author)2017-01-07

Nice work! Thanks for sharing. I'll have to file this away so I can build it one day.

braulio777 (author)quasidordux2017-01-07

Thank you for your comments.

About This Instructable




Bio: I'm engineer and like to design electronic and programming things with Arduino hardware.
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