My DIY Oscilloscope, how i got my signal 
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 
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
Top Comments
True, I highly recomened if using ribbon cable, buy a roll, and add the ends yourself, much much cheaper. I usually buy them home in 10 meters at a time.
But, I try to use cable as little as possible, to…
I just received a LCD TFT shield that I had ordered for no particular reason. Now I'm going to have to play with it. Thanks for the incentive!
Nope just one of them.
The problem was the Screen it took up all my pins on the arduino uno.
You could do a messy workaround, either by soldering something onto the SD pins (since were not using them anyway…