[sdiy] digitally controlled potentiometers

[Paul Schreiber]

Just something to think about:

The average person, turning a standard 300 degree rotation pot, can set that pot 
to ~50 *repeatable* positions. Or within +-3 degrees. Digital pots having 128 
discrete steps actually have *better resolution* than you yourself turning a pot 
and then having it "remembered" (like say a P5 or OB-8).

No one will even notice 128 steps as a 'loss of accuracy', zipper or no zipper. 
Certainly 256 steps (8-bit binary weighted) is overkill.

Paul S.