[sdiy] crackle box

[Caleb Johnston]

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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