[sdiy] control voltage problem

[Grant Richter]

The ARP Odyssey pitch bender uses a pair of back to back diodes in series
with the pot wiper, to create a zero volt "dead zone" in the middle. That
would allow a definite zero in the center.

You could use one nine volt battery for positive voltage and another nine
volt for negative voltage. Connect the terminal common to both batteries to
ground.

Regular diodes can be used to reduce the voltage to anything you want. Each
diode in series will reduce the voltage by around 0.6 volts. So 5 diodes in
series is around 3 volts.

All parts can be had at Radio Shack.

> From: "Caleb Johnston" <caleb_1 at msn.com>
> Date: Sat, 25 May 2002 13:08:35 -0400
> To: synth-diy at dropmix.xs4all.nl
> Subject: [sdiy] control voltage problem
> 
> 
> 
> control voltage problem
> 
> is it possible to get an output of - 5V to + 5V with one potentiometer?  and
> have the output be 0V when the potentiometer is in the middle?
> 
> if anyone has a circuit that will do this, please email me directly.  i cant
> seem to come up with a circuit that will do this.  preferably a dc circuit
> powered by batteries.  thanks.
> 
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