Modular Synth Panels

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.
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>   File        : /Richard Brewster Designs/passives.fpd 
>   Uploaded by : pugix <pugix@...> 
>   Description : 1U with passive pot, capacitor, vactrol and diode 
>
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> http://groups.yahoo.com/group/ModularSynthPanels/files/Richard%20Brewster%20Designs/passives.fpd 
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> pugix <pugix@...>
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