[sdiy] percussion sensors?

[patchell]

    The Black velostat bags will work for this as well.  However, they
also have hysteresis...

Tim Ressel wrote:

> 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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--
 -Jim
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