[sdiy] wacky pneumatic controller idea

[jhaible at debitel.net]

> back in the day, gas stations used to have a bell that rang when a car 
> pulled into the lot. the mechanism was a simple one, just a piece of capped 
> off hose which connected to an air pressure switch. using a modern 
> subminiture pressure sensor and some surgical tubing it just might be 
> possible to build a pneumatic controller for synth use. seems like a good 
> idea, but then again it's very late and I have spent way too many hours in 
> front of the PCB designer screen.


This is exactly how the aftertouch works in a RSF PolyKobol 2 !

JH.

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