On Monday 30 August 2004 07:29 pm, ron amundson wrote:
> One could also use optocouplers and a mylar disk...
> bit it gets spendy.
Not necessarily. I have a couple of motors equipped with such encoders. And
you have two of them in any given mouse that's out there -- it shouldn't be
too hard to adapt that technology to be used with a knob and a shaft, though
a good bit of weight behind the panel gives it a better feel.
This sort of thing was actually used, in a z80-based system to control most
all functions on the Moog Source -- you had what was basically a membrane
panel, where you selected what function you wanted to mess with, you had a
couple or three digits of LED display to tell you what the current value was,
and you had one big knob to fiddle with it.
Not bad...