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  • Author Author: e14 Contributor
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A simple DIY Oscilloscope with Arduino Uno and Mega

e14 Contributor

My DIY Oscilloscope, how i got my signal image

 

Content :

- Description

- Screenshots

- Video

- Credits and links

 

Descriptions

 

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.

 

 

Some screenshots..

This is the .96" OLD test, single wave test imageimage

 

 

 

imageimageimage

2.4" TFT screen on the Uno,    two right images same screen on a Mega.

 

 

A youTube vidoe i made on the experience.

 

 

 

Credits and Links :

 

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

https://dl.dropboxusercontent.com/u/19761809/arduino/Vaupell-Oscilloscope.zip

 

 

Original Oscilloscope link (code by : Noriaki Mitsunaga ) :

http://n.mtng.org/ele/arduino/oscillo-j.html

 

 

Original TFT display link ( TFT shield library source ) :

http://www.smokeandwires.co.nz/blog/a-2-4-tft-touchscreen-shield-for-arduino/

 

TFT library :

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

Attachments:
Vaupell-Oscilloscope.zip

  • @Brian Welsby: Thank you, now I could download the sketch, but oszi won't work. Perhaps my 2.4 TFT shield is different. I will try it on an uno.

     

    Best regards

     

    Michael

  • in reply to e14 Contributor

    Michael Hroch wrote:

     

    Has anybody an idea what is wrong (swap?) and how to fix it.

     

    Thank you and have a nice weekend.

     

    Michael

    A quick google search and I found this here https://github.com/Smoke-And-Wires/TFT-Shield-Example-Code/issues/7 

    hope that helps.

     

    Brian

  • Has anybody an idea what is wrong (swap?) and how to fix it.

     

    Thank you and have a nice weekend.

     

    Michael

  • in reply to Nate1616

    @Nate1616

     

    here is the error code: Exit status 1 (I have tried other sketches to download in the mega and they work):

     

    Thanks for support!

     

    Michael

     

    _________________

     

    Arduino: 1.6.7 (Windows 10), Board: "Arduino/Genuino Mega or Mega 2560, ATmega2560 (Mega

    2560)"

     

     

    C:\Users\recycler\Documents\Arduino\libraries\SWTFT-Shield\SWTFT.cpp: In member function

    'void SWTFT::drawLine3Byte(int16_t, int16_t, int16_t, int16_t, uint8_t, uint8_t, uint8_t)':

     

     

    C:\Users\recycler\Documents\Arduino\libraries\SWTFT-Shield\SWTFT.cpp:630:16: error: 'swap'

    was not declared in this scope

     

     

         swap(x0, y0);

     

     

                    ^

     

     

    C:\Users\recycler\Documents\Arduino\libraries\SWTFT-Shield\SWTFT.cpp:635:16: error: 'swap'

    was not declared in this scope

     

     

         swap(x0, x1);

     

     

                    ^

     

     

    exit status 1

    Fehler beim Kompilieren.

     

     

      Dieser Report hätte mehr Informationen mit

      "Ausführliche Ausgabe während der Kompilierung"

      aktiviert in Datei > Einstellungen.

  • Hi Martin, my compliments.

    I have followed this project by when you started to publish it and I appreciate very much how you developed the idea. Last but not least the order. Not only it is well done but IMHO it is also well explained making it perfectly replicable. The only thing I had added is a video with some specific measurement, just to make it more attracting for the users.

     

    BTW I have also though to an alternative, seeing your development timeline; in past I have used Arduino (an AVR328p, so a less powerful and slower microcontroller) to create an oscilloscope but in this case the Arduino board was just acting as a terminale while the entire graphic interface was developed in processing and java working on a separate computer. Something following the same proof of concept of the association Bitscope micro and Raspberry PI (you can take a look to the article I recently published Essential Raspberry Pi Peripherals #5 The Pi-Scope lab tool ) As a matter of fact I have not evolved the original Arduino - PI "Skope" project just because I moved on this more complete alternative. But while a Raspberry PI3 + Bitscope Micro will cost about 150 Euro, your solution may cost less than half. I am just curios to know what do you think of this idea.

     

    Enrico