[sdiy] crackle box

[s.thomas]

Hi Caleb..I actually built a small run of crackle boxes with a view to
selling some.
I did manage to do the latter for a couple of customers until Steim politely
asked me to stop! Apparently they are planning a re-issue of the crackle
box. Funny cos I  sent loads of emails to them BEFORE I started making the
boxes asking them if they  were happy with this. I didnt get a  single reply
(certainly none from Michael Waisviz ). Then when I started selling a few of
them ..they woke up I guess. In anycase there has been a rumour running for
years  about a re-release but nothing has happend to date to my knowledge.

Anyway regarding your question about the touch pads. They are literally just
brass/metal contacts wired  directly to the circuitboard. These are designed
to form feedback loops etc for the circuit ..using the capacitance
/resistance of the body to
affect an opamp that is operating in a non-linear region.  You can use brass
tacks used  in upholstery. I used brass mirror fixing screws with domed
heads. Their larger surface area  allows you  more subtle 'control'  in the
sound by moving the fingers and changing the pressure of touch.

hope this helps

cheers
steve thomas


----- Original Message -----
From: "Caleb Johnston" <caleb_1 at msn.com>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Sunday, November 23, 2003 1:54 PM
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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