Hall effect CV pedals (was: Volume pedals for CV discussion)

[Paul Perry]

At 04:44 PM 6/04/99 -0300, edu silva wrote:

>Have any of you ever tried to use a Hall effect device instead of a
>potentiometer or LDR? A magnet can be glued to the underside of the pedal,
>and as it is depressed, the magnet is brought closer to the Hall eff
>device. The closer it is, the stronger the magnetic field is, and thus the
>output voltage.

Yes, it works.
Make sure the Hall device you get is linear, nearly all are for switching
and have a built-in comparator and digital output.

paul perry Frostwave p/L melbourne australia

BTW if you are thinking of using a pedal in a mangrove swamp, this is the way.
Also, for a nice hand-operated lfo, spin a bike wheelpast one with magnets
stuck on.