[sdiy] circuitbending expensive gear (or ESD-safe body contacts)

[Amos]

Hi Tim and all,

although this idea is inspired by circuit-bending, I was not planning on
following the usual Casio "poke and hope" method of circuit exploration.
Rather I am talking about taking a known modulation bus which operates
within a 0V to +5V range, and inserting a body contact so that I can load
down/mess with the shape of the signal it carries.  Perhaps connecting the
body contact to the mod bus via a 100K resistor would suffice?


On 1/26/06, Tim Parkhurst <tim.parkhurst at gmail.com> wrote:
>
> On 1/25/06, Dave Magnuson <resfreq at hoohahrecords.com> wrote:
> >
> > > ----- Original Message -----
> > >> Just one cautionary note: It sounds like you're thinking of adding
> > >> body contacts to AC line-powered equipment. This sounds like a
> > >> REAALLLLLY bad idea.
> > >>
> > >> Comments? criticisms? tar? feathers?
> >
> > I wouldn't imagine that this would be any more dangerous than holding a
> > patch cable in your hand that's conencted to the synth...
> >
> > Dave
> >
> >
>
> Ah, maybe I'm wrong then. I was thinking that he might be tapping to
> various points in the circuitry, and not necessarily just "normal"
> I/O. If you're poking around "under the hood" in a synth, the
> potential for tapping into a power rail (or something darn close) does
> exist. True, we're only talking 12 to 15V in most cases, but I still
> wouldn't want to put my fingers across +V and ground on a DC supply
> capable of delivering 1Amp or so. As far as grabbing onto a patch
> cord, on your average synth anything that you can connect a patch
> cable to SHOULD be protected by resistors or other
> overvoltage/overcurrent devices (e.g., 100K on inputs, 1K on outputs),
> so I wouldn't think there's too much danger there.
>
> Am I still not getting it?
>
> Tim (zap!) Servo
> --
> "Imagination is more important than knowledge." - Albert Einstein
>
>
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