[sdiy] touch-sensitive switches - how?

Chris McDowell declareupdate at gmail.com
Wed Apr 28 20:13:10 CEST 2021


MPR121 is pretty awesome but no longer available from real suppliers. If this is a one off and you're down to get them from amazon or ebay, then it's great.


> On Apr 28, 2021, at 1:07 PM, Nathan Trites <nathan at idmclassics.net> wrote:
> 
> the MPR121 is used in a few modules that do this. The Doboz TSNM is an excellent module with schematic available, along with a few nice uses of pressure like looping modulation. 
> 
> https://doboz.audio/tsnm-mkii/ <https://doboz.audio/tsnm-mkii/>
> 
> - Nathan
> 
> On Tue, Apr 27, 2021 at 2:50 PM Neil Harper via Synth-diy <synth-diy at synth-diy.org <mailto:synth-diy at synth-diy.org>> wrote:
> how are touch-sensitive switches like the ones on this done?:
> 
> https://www.perfectcircuit.com/random-source-tkb-3-5mm-jacks.html <https://www.perfectcircuit.com/random-source-tkb-3-5mm-jacks.html>
> 
> being able to do something like this, especially if it's latching  (one
> press on, one press off) would come in very handy. but i've never come
> across it in any diy schematics.
> 
> i see that a few microcontrollers like the teensy have capacitance touch
> pins, but i'm wondering if things like sequencer are done all discrete?
> 
> 
> --
> /// Neil Harper
> /// Every Wave is New Until it Breaks
> 
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