[sdiy] keyboard question and generating cv

[Ian Smith]

I'm probably going to end up using the tact switches. I didn't know that the conductive rubber contacts were crap. 
Anywho, the next question in line would be, can a CV generating keyboard be run off of one (at most two if the supply needs to be bi-polar) 9V batteries. I really don't want any power wires running to this thing.
-Ian

----------------------------------------
> From: pfperry at melbpc.org.au
> To: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] keyboard question and generating cv
> Date: Mon, 13 Apr 2009 21:15:34 +1000
>
> I agree that it would be beter to use the contacts to drive logic, and
> isolate the contacts from the CV side of things.
>
> But, if a very high impedance circuit is used, it should be possible to use
> even crappy conductive rubber contacts to pick off a voltage. Because if the
> current through the contact is negligible, so is the voltage drop. Though
> you are leavingyourself open to noise pickup.
>
> paul perry (glad he's not doing it) Melbourne AUstralia
>
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