[sdiy] Mod Wheel Thoughts

[Ian Fritz]

At 12:26 PM 3/13/2005, mark verbos wrote:
>See Buchla 219 joysticks.
>
><http://www.synthtech.com/pix/buchla/b219/b219_joy1.jpg>http://www.synthtech.com/pix/buchla/b219/b219_joy1.jpg
>http://www.synthtech.com/pix/buchla/b219/b219_joy2.jpg
><http://www.synthtech.com/pix/buchla/b219/b219_joy3.jpg>http://www.synthtech.com/pix/buchla/b219/b219_joy3.jpg
>http://www.synthtech.com/pix/buchla/b219/b219_joy_light.jpg
>
>you are looking at a light bulb with 4 photo resistors around it. The 
>stick is attached to a knob that goes on top of the light bulb. As you 
>lean the stick from side to side it exposes the light to the opposite 
>photocell.

Looks like it probably uses bridge-type circuitry.  Should provide pretty 
good temperature stability, whatever anybody thinks about the mechanical design!