[sdiy] touch-sensitive switches - how?

Nathan Trites nathan at idmclassics.net
Wed Apr 28 20:07:33 CEST 2021

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.


- Nathan

On Tue, Apr 27, 2021 at 2:50 PM Neil Harper via Synth-diy <
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
> 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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