A simple DIY Oscilloscope with Arduino Uno and Mega

My DIY Oscilloscope, how i got my signal

Content :

– Description

– Screenshots

– Video

– Credits and links

A simple DIY Oscilloscope with Arduino Uno and Mega


I am experimenting with RF and IR signals in various frequencies and had some trouble with the receivers and needed to see what kind of signal i was receiving.

I cannot afford a real oscilloscope but i knew about the older Arduino oscilloscopes.

After trying many different versions of code and tutorials, I was unable to get a single one to work, and all the tutorials and guides around was 2-3 years old.

Not sure if it is the IDE or the actual hardware that has changed in such a way that it didn’t work anymore.

I finally found a working oscilloscope from a Japanese website, (linked below) and a working TFT screen library,

meaning i could read the various signals received.

Clearly the limitations are 0-5v but that is fine, what i needed to know is either wave type and frequency, and this is sufficient.

It also gives me an indication of the amplitude which is just a nice bonus.

But what I’m most happy with, is the two channel feature, i often use the second channel as a reference point to be able to

differentiate the main channel on the screen.

Credits and Links :

My compilation of the Oscilloscope and TFT library  ( what you see on the video and images ) :


Original Oscilloscope link (code by : Noriaki Mitsunaga ) :


Original TFT display link ( TFT shield library source ) :


TFT library :

Library : https://github.com/Smoke-And-Wires/TFT-Shield-Example-Code


For more detail: A simple DIY Oscilloscope with Arduino Uno and Mega

This Post / Project can also be found using search terms:

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