[sdiy] Possible Ribbon Controller Material?
Paul Perry
pfperry at melbpc.org.au
Sun May 6 02:51:07 CEST 2007
Back in the Old Days, there were antistatic straps you could fit to car
bumpers to discharge static electricity. I think these were rubber with
sufficient carbon to be conductive, and trhus promising for ribbon
controllers.
BUT! I bought a modern one the other day, turned out to be plastic with a
copper wire embedded :-(
And I have tried various antistatic mats, there the resistance seems too
high. (in fact unmeasurable on my meter, even with pretty good contacts to
the material).
At the other end of hthe scale, there is nichrome (or whatever iut is)
element wire from electric jugs & radiators. The resistance here is lower
than one would ideally want, but it might be that running a constant current
through it & amping up the picked off voltage (and applying severe filtering
to get rid of hum.... or maybe applying say a higher freq AC signal & doing
some filtering) might work.
I seem to remember the original Moog ribbon having a wound resistive element
that a flat metal strip pressed onto.
Someone will tell me if I was wrong ;-D
Paul perry Melbourne Australia
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