[sdiy] percussion sensors?

[Tim Ressel]

Yo,

Many moons ago I played with black anti-static foam
for this application. You take a 3x3" (that's 76x76mm
for those across the pond) piece of static foam, and
sandwich it between two metal plates which have wires
attached. this sensor is resistive and needs a current
source. A resistor tied to +V works fine. When you
strike the plate you get a spike in voltage. When you
press it, you get varying voltages. The main problem
was the resting voltage would move around alot. This
is cause the resistance is proportional to the average
thickness of the foam, and the foam slowly expands
after compression. 

It might be worth playing with.

--Tim

--- Bert Schiettecatte
<bert.schiettecatte at esat.kuleuven.ac.be> wrote:
> hi,
> 
> i've been looking at 
> 
> http://www.paia.com/drumsens.htm
> 
> trying to figure out the best way to build my own
> drum sensors. 
> I'd like to use my fingers for tapping the sensors,
> and i'd also 
> like to have 'aftertouch' if possible. what would be
> the best 
> and cheapest sensor for this?
> 
> thanks in advance!
> bert


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