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Post by thehatghost on Jun 24, 2021 17:30:42 GMT
Hopefully another easy DIY project for the board in the making... Apologies if something like this has been posted before.
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Post by rockysmalls on Jun 24, 2021 18:16:12 GMT
Hopefully another easy DIY project for the board in the making... Apologies if something like this has been posted before.
just out of interest how expressive is a single one of these , does it have a cv range or is it just on/off. |
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Post by thehatghost on Jun 24, 2021 18:57:04 GMT
The individual buttons are just on/off at 5v, but the buttons are all running through an r2r ladder. Triggering various buttons in together in various combinations will produce different cv values. I still got to dial resistor values in to see how accurate I can get it and throw in some trim pots for adjustment, ect. but my goal is to get maximum functionality out of a really simple design.
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Post by rockysmalls on Jun 24, 2021 20:27:45 GMT
The individual buttons are just on/off at 5v, but the buttons are all running through an r2r ladder. Triggering various buttons in together in various combinations will produce different cv values. I still got to dial resistor values in to see how accurate I can get it and throw in some trim pots for adjustment, ect. but my goal is to get maximum functionality out of a really simple design.
aha... thanks for the info , i was presuming those rings would give some variation of capacitance.. |
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Post by thehatghost on Jun 25, 2021 2:25:55 GMT
The individual buttons are just on/off at 5v, but the buttons are all running through an r2r ladder. Triggering various buttons in together in various combinations will produce different cv values. I still got to dial resistor values in to see how accurate I can get it and throw in some trim pots for adjustment, ect. but my goal is to get maximum functionality out of a really simple design.
aha... thanks for the info , i was presuming those rings would give some variation of capacitance.. Yea, hard to get that with capacitive touch but you can get other weird effects like triggering through proximity. But I sat down today and think I figured out a way to have our cake and eat it too. Stay Tuned! |
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Post by rockysmalls on Jun 25, 2021 8:01:15 GMT
aha... thanks for the info , i was presuming those rings would give some variation of capacitance.. Yea, hard to get that with capacitive touch but you can get other weird effects like triggering through proximity. But I sat down today and think I figured out a way to have our cake and eat it too. Stay Tuned! i’m all ears  |
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namke
wonkystuff
electronics and sound, what's not to like?!
Posts: 686
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Post by namke on Jun 25, 2021 12:03:48 GMT
watching this with interest -- I also started looking at capacitive touch stuff recently |
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Post by rodney on Jun 27, 2021 23:51:28 GMT
I'm also very keen on trying more capacitive touch stuff. |
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Post by thehatghost on Jul 2, 2021 15:33:30 GMT
So it turns out that you can get expressive capacitance readings! (just not with the touch sensors I was using before). I went with code for this one (which still needs a lot of work and is buggy) but here's a video of using capacitive touch for expression. The blue wire on the right hand side of the screen is my interface and the output is just going into an oscillator's cv input and then into the mixer. I plan to develop this further in the next few weeks, but figured it would also be fun to share.
Would this be something people would be interested seeing as a module? I'm thinking right now that it would be great if it became a Grains- style touch controller that people cold develop code for. I also know nothing about the module creation process and would be open to collaborations.
-Blayne
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Post by rodney on Jul 7, 2021 18:22:38 GMT
Looks great. A multi-thÆramin module would be super cool! I just ordered a couple of Seeeduino Xiao boards for related tinkering. I imagine a 1 output thÆramin could be done with a low parts count. These are 3v chips though, so MCP602 or similar would be needed to convert the DAC output. wiki.seeedstudio.com/Seeeduino-XIAO/ |
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Post by thehatghost on Jul 8, 2021 15:34:11 GMT
Looks great. A multi-thÆramin module would be super cool! I just ordered a couple of Seeeduino Xiao boards for related tinkering. I imagine a 1 output thÆramin could be done with a low parts count. These are 3v chips though, so MCP602 or similar would be needed to convert the DAC output. wiki.seeedstudio.com/Seeeduino-XIAO/Awesome! I got a version in python working pretty well for a single thÆramin, but had to put it on a raspberry pi for reliable results.
I did an initial test using arduino code, it's runs so much faster but i'm not as familiar code wise.
I'll probably do a report out soon on initial findings soon so that others can start tinkering with it while I cook up the multi-thÆramin module which would have more variability and features.
Here's a video of the Arduino port of the code in action, here it's going into an oscillator's cv input and then straight into the mixer :
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