[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