[sdiy] rotary encoder?

[mark verbos]

If you're gonna do that, you may as well just use a 12 way single pole  
switch with 22 diodes and 4 resistors to ground. That may be the  
cheapest/easiest solution for a 12 position binary switch.

Mark



On Jan 8, 2009, at 3:19 PM, Ingo Debus wrote:
>
>
> Here's another weird idea: you could make a switchable voltage  
> divider (string of 11 resistors) and feed that into a 4 bit ADC. A 4  
> bit ADC can be made of 4 opamps and a lot of resistors, something I  
> learned here on this list many years ago. Of course you could use a  
> microcontroller with on-chip ADC instead, this time with really low  
> pin count.