Multi axis foot pedals?

[harry bissell]

Like I said... check out the Ernie Ball pedal construction... It uses a
cord wrapped around the pot shaft and attached to the pedal ends. Moving
the pedal (angle) is converted to rotary motion...

Like the old Dial Cord in analog radio tuners... Multi-gang air core
variable capacitors... Think Back... farther... farther... ahhh!
Remember now ???

BTW old radios make a great source of the tiny pulleys etc if you want
to get fancy...I did it with some screw-eyes and nylon braid cord... I
got bored with it before it broke !!!

:^) Harry

Toby Paddock wrote:

> 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