[sdiy] crackle box

[Theo]

In this case the touch pads are just spots where you poke your finger in the
circuit.
No pressure/heat/surface or any thing like that involved here.
Main thing that happens is that your body acts as a antenna inducing noise
in the circuit.

Cheers,
Theo


From: Caleb Johnston <caleb_1 at msn.com>


>
> These touch pads will be similar to keys on a synthesizer.  The output
would
> be an analog signal from the finger tip.  Im not sure if the schematic is
> designed for pressure sensitivity, heat or surface area of touch.  Here
are
> some links to explain the crackle box:
>
> http://www.eam.se/kraakdoos/
> http://www.xs4all.nl/~mwais/CrackleBox.htm
>
> I am sure the people who designed these would know.  Does anyone have any
> connections with them?
>
> -C
>
> >From: "Ray Wilson" <raywilson at comcast.net>
> >To: "Caleb Johnston" <caleb_1 at msn.com>, <synth-diy at dropmix.xs4all.nl>
> >Subject: RE: [sdiy] crackle box
> >Date: Sun, 23 Nov 2003 07:56:21 -0700
> >
> >Hi Caleb
> >
> >I have not seen a "touch pad" per se but I am familiar with several
> >mechanisms for creating a switch that will repond to being touched. Are
> >these strike pads as used in electronic drums or are they being used in
> >place of mechanical push buttons? What is the output you are trying to
> >achieve? Switch closure? Logic signal? Analog signal which responds to
the
> >velocity of the touch? I imagine that if you provide more information
> >regarding your application you will get more responses.
> >
> >Keep trying.
> >
> >Cheers
> >
> >P.S. I'm not familiar with a "crackle box" what is that?
> >
> >Ray
> >
> >-----Original Message-----
> >From: owner-synth-diy at dropmix.xs4all.nl
> >[mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of Caleb Johnston
> >Sent: Sunday, November 23, 2003 6:55 AM
> >To: synth-diy at dropmix.xs4all.nl
> >Subject: [sdiy] crackle box
> >
> >
> >I tried sending this question before, but it didnt get a response.  That
> >seems odd, so maybe it didnt go through.  I am trying to build a crackle
> >box.  The schematic calls for touch pads.  Anyone know where I can get
> >these
> >or a part number?  Any help on tracking down these touch pad components
> >would be a great help.
> >
> >Thanks community synth brain
> >
> >-C
> >
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