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--- In
ModularSynthPanels@yahoogroups.com, Richard Brewster
<pugix@...> wrote:
>
> This is a 1U panel for four passive devices: 1 potentiometer
> (Resistor), 1 Capacitor (1 of 11 values, selected by a rotary
switch), 1
> Vactrol, and 1 Diode. Note that all three terminals of the pot are
> available, with the BOTTOM terminal normalized to ground. This allows
> it to be used as a 2-terminal rheostat, as for example in a low-pass
> filter configuration with the capacitor. (Signal into Wiper, with
> Bottom tied to one end of Capacitor through a multiple which provides
> the output.) Both ends of Capacitor are normally connected to ground.
> Each of the four devices can be used independently. And they can be
> patched together to make various high and low-pass filters. The
Vactrol
> provides a voltage-controlled resistor. (I am thinking to add a 470
ohm
> series resistor to the Vactrol LED to limit current.) I had room for
> two more jacks, so I included a Diode.
>
> I think I will make one of these and try it out. Unfortunately the FPD
> panel costs $60 US!
>
> -Richard Brewster
> http://www.pugix.com
>
> ModularSynthPanels@yahoogroups.com wrote:
> > Hello,
> >
> > This email message is a notification to let you know that
> > a file has been uploaded to the Files area of the ModularSynthPanels
> > group.
> >
> > File : /Richard Brewster Designs/passives.fpd
> > Uploaded by : pugix <pugix@...>
> > Description : 1U with passive pot, capacitor, vactrol and diode
> >
> > You can access this file at the URL:
> >
http://groups.yahoo.com/group/ModularSynthPanels/files/Richard%20Brewster%20Designs/passives.fpd > >
> > To learn more about file sharing for your group, please visit:
> >
http://help.yahoo.com/l/us/yahoo/groups/original/members/web/index.htmlfiles > >
> > Regards,
> >
> > pugix <pugix@...>
> >
> >
> >
>