Sounds good! : )
The SEM VCF uses just one op-amp and four resistors, the pot having the
CV straight to one side of the pot, the inverted CV to the other. Maybe
a buffer on the output would be good, but that's still pretty darn
tiny. NanoPolarizer?
Doesn't Peter Grenader's Gizmotron do that, though?
Are those still available?
Scott Deyo
The Bridechamber
contact@...http://www.bridechamber.comJealous Edison Record Kompany
http://www.jealousedison.com On Jul 8, 2008, at 6:41 PM, Samppa Tolvanen wrote:
> Hi all,
>
> On Sun, Jul 6, 2008 at 7:28 PM, Scott Deyo <contact@...>
> wrote:
> > I believe the prob w/ normal center-detent pots, is that w/ 20%
> typical pot
> > tolerance, you need to place a trimmer in there, to make sure
> center is
> > really 'off'.
> > With a center tap to ground, the center is 'bigger', and should
> definitely
> > be 'off'.
> > Or something.
>
> Amen!
>
> > Someone else may not design circuits around these pots, but they'd
> work well
> > in my optic cv processor, and an other modules down the line. I'll
> hog 'em
> > to myself!
> > ; )
> >
>
> I might have to take some words back.. Ok, 3 opamps (1 quad with the
> infamous "Ground Follower"), 2 caps, 2 resistors, about 1 square inch
> of PCB and this pot - You'll have an universal bipolar attenuator,
> that follows modular I/O impedance requirements and can be fitted
> nearly everywhere.. would that be next Bridechamber "module"? ;)
>
> If someone just forgets to use this wonderful toy in the design.. just
> add it. Maybe some panel designs might also come with +/-5 scales and
> this Wonderful Gadget :D As seen on TvShop: "Finally I can leave My
> VCOs bipolar modulation input connected, without having to hunt down
> why Pitch wanderers, Thanks to this perfect solution! Order Now.."
>
> Samppa
>
>