[sdiy] Boss PC-2 CT pot replacement

[Dan Snazelle]

Sent from my iPhone

On Sep 9, 2011, at 10:23 PM, "Paul Perry" <pfperry at melbpc.org.au> wrote:

> This may not be relevant to the original poster, but could be useful in a space-strapped modular design:
> The usual reason for a centre tapped pot is to ground the middle pin, and feed two unrelated signals to the other ends, so you have the option of picking off a variable amount of signal 1 or 2.
> Now, in many applications you can replace the centre tapped pot by a switch and a normal pot - but that makes two holes on the panel.
> My idea is this: take a dual ganged pot.
> Run a constant voltage to one of the pots, and use this to generate a CV indicating pot position.
> Now use that CV to toggle a comparator - and use the comparator to control switches to select the signal to the other pot, or indeed rearrange any ammount of circuitry (eg filter configuration).
> Yes, a certain amount of circuitry involved, but perhaps useful sometime.
> 
> paul perry melbourne australia
> 
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Since the comparator would only put out high or low, how could you route various signals to the other side of the pot? I was thinking a 4051/4052 but they all take more than one high/low input



Thnx