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 Forum index » DIY Hardware and Software » Developers' Corner
Using a touchscreen to create Control Voltages (X and Y) and
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Grumble



Joined: Nov 23, 2015
Posts: 1230
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PostPosted: Mon May 31, 2021 4:58 am    Post subject: Using a touchscreen to create Control Voltages (X and Y) and
Subject description: Using an Arduino Nano
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Basic setup, but I was so excited by the result that I hád to post it...
The touchscreen is connected to a AD7873 touch screen digitizer, read out by an Arduino Nano. The results are written in an AD5754 quad 16 bit DAC while the Gate is created by writing to PD7 of the Arduino nano.

For now, only 2 DAC channels are used, but in the near future I will look for other signals to create. I have some ideas...

Also it should be possible to read the pressure, I will look into that too.


touchMegaSCH.pdf
 Description:
The schematic used in this setup

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 Filename:  touchMegaSCH.pdf
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gabbagabi



Joined: Nov 29, 2008
Posts: 633
Location: Berlin by n8
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PostPosted: Mon May 31, 2021 9:50 am    Post subject: Reply with quote  Mark this post and the followings unread

Doc Grumble is grumbeling again!
Very nice!
Very Happy
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Blue Hell
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Joined: Apr 03, 2004
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PostPosted: Mon May 31, 2021 10:38 am    Post subject: Reply with quote  Mark this post and the followings unread

Cool, nice large size too :)
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also .. could someone please turn down the thermostat a bit.
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PHOBoS



Joined: Jan 14, 2010
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PostPosted: Mon May 31, 2021 6:39 pm    Post subject: Reply with quote  Mark this post and the followings unread

awesome !
I've looked at them before but wasn't sure how to use the signals. The AD7873 looks interesting.

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Grumble



Joined: Nov 23, 2015
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PostPosted: Mon May 31, 2021 10:24 pm    Post subject: Reply with quote  Mark this post and the followings unread

I used this for a start, couldn’t get it to work but I altered some of the code and now it does work, though not with interrupts.

https://github.com/diaowd/AD7873

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