[sdiy] OK, so...there's this guy...

[Craig Critchley]

I haven't tried these myself, but Digikey carries touch some sensor chips
from Quantum Research Group. Most are logic outputs, there's also one with
an "analog" output (in the form of a 100KHz PWM signal). Perhaps this guy
Peter knows would find those useful.

http://www.qprox.com

                ...Craig

----- Original Message ----- 
From: "Tim Parkhurst" <tparkhurst at siliconbandwidth.com>
To: "'Peter Grenader'" <peter at buzzclick-music.com>;
<synth-diy at dropmix.xs4all.nl>
Sent: Friday, September 26, 2003 11:33 AM
Subject: RE: [sdiy] OK, so...there's this guy...


> Maybe this guy should do a search under "capacitive Switches" or "Touch
> Switches." It sounds like this guy wants to do something LIKE a touch
> switch, but not exactly the same thing. However, maybe some of the tricks
> used with capacitive switches and touch switches (using RF fields,
proximity
> detection, using finger capacitance to vary the speed of an oscillator and
> detecting the frequency change, etc.) might help this guy out in his
> obviously noble quest for knowledge, truth, and weird noises.
>
> This guy might also want to check out the wacky capacitive pitch bender
used
> on the PAIA "Oz" mini organ years ago.
>
>
> Tim Servo
> (with theme to "That Girl" and lyrics changed to "This Guy" running
through
> his head now)
>
> **************************
>
>
> > -----Original Message-----
> > From: Peter Grenader [mailto:peter at buzzclick-music.com]
> > Sent: Friday, September 26, 2003 10:47 AM
> > To: synth-diy at dropmix.xs4all.nl
> > Subject: [sdiy] OK, so...there's this guy...
> >
> > And let's say, for argument sake, that this guy is working of creating a
> > logical true (high) when his finger is placed on a piece of conductive
> > material, be it a small strip of metal or a coin, or anything with
similar
> > conductive qualities.
> >
> > And let's just say that he's got it to the point where a signal will in
> > fact
> > rise from ground to about 2 tenths of a volt, albeit one that's looks to
> > be
> > nothing more than amplified noise in that it's a somewhat messed up sine
> > wave with a period of about 15 ms.
> >
> > And let's say, for argument sake, that this guy has tried a few tricks
in
> > an
> > attempt to convert that to a linear DC level of .2 volts without
success.
> >
> > What would you suggest I, I mean... *this guy*, try next?
> >
> > Any suggestions?
> >
> > thanks in advance,
> >
> > Peter
> >
> >
> >
>
>
>
>
>
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