[sdiy] Piezo sensor panel UI!

[KD KD]

Typical disk benders, odd name for regular piezo sensors, are made of a PZT,
lead, oxygen titanium or zircon compound ceramic doped into the proprieties
you want, Alesis Quadraverb is the only audio device i know of that used piezo
sensors for the button interface, press the button harder and the step speed
increased.

Why haven't anyone built a entire panel user interface? it would be dead cheap
applying the ceramic paste like solder paste, easily multiplexed, one rectifier
and clamp limiter for all sensors etc etc easily handed by a MCU A/D channel
and a routine to create dead zones and filtering to avoid multiple
sensor triggering
etc etc.

Imagine a typical button user interface synth i.e 250 tact buttons and
one slider,
a drag using conventional tact switches but with PZT zones one could press
the zone/button or just bang it to jump from lets say 10 to 200 value
and depending
on how hard you tap it step size could increase then tap lighter for
finer adjustment!

http://www.americanpiezo.com/standard-products/disc-benders.html