Multi axis foot pedals?

[Toby Paddock]

I like the ball bearing lazy-susan idea.
They make them big enough to mount the 
whole pedal on.

Using a magnetic sensor and rotating magnet 
might be be easier than mounting a pot. (maybe)
Starting from the floor:
--- A hunk of wood.
--- Lazy susan.
--- Pedal.

Attach a mag sensor to the wood in the center of rotation, 
with its sensitive axis horizontal.
Attach a magnet to the bottom of the pedal, again 
in the center of rotation and the N-S axis is horizontal.
When the magnet and sensor axes are 90 deg from 
each other, the sensor would see no field.
As they rotate away from 90 deg, the sensor 
would go + one way and - the other.
Add an op amp circuit for gain and offset control 
and more current.

My page at:
http://www.seanet.com/~tpaddock/mag2cv.html
has some info on Allegro sensors (hint hint - free samples).
It's doing the same thing as the pendulum in the photo 
if it was not swinging, just rotating.

 - -- -  Toby Paddock