[sdiy] center tapped pots?

[Andre Majorel]

On 2007-04-10 19:20 +0100, Mike wrote:

> There is an old trick I learned back in the day, to get a 'dead
> band' in the middle of a pot: connect a pair of diodes, back to
> back, in parallel, in the line from the wiper. This gives a +/-
> 0.7V mid point null area. It can be useful, for for pitch
> benders, since the voltage from the pot is being added to the
> pitch voltage anyway.

Or as shown below, run two resistors of equal value from the
wiper, one going to the CW lug, one going to the CCW lug. The
curve is relatively flat around the mid point and gets steeper at
either extreme. Probably good for a VCO detune pot.

  http://www.elby-designs.com/documents/tailoringpotentionometers.pdf

-- 
André Majorel <URL:http://www.teaser.fr/~amajorel/>
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