AVR-Chat

Some one did do just that.  check out this page - 
<http://www.portlandrobotics.org/robots/servo_encoder/index.html>

but wouldn't an optical encoder simply tell you relative motion (not 
absolute)?  

How important is it to know the initial position?  You can command a 
servo to a known position and go from there.  

If you want to know position after a power cycle, you could store the 
value in eeprom befor powering down (or as you commmand the device, 
more likely).  It would require a way of setting the first initial 
position, though.

 
--- In AVR-Chat@yahoogroups.com, "upand_at_them" <upand_at_them@y...> 
wrote:
> If you're real crafty you might be able to fit an optical encoder 
> ring inside the servo housing.
> 
> Or could you store the last position in the MCU before shutdown?  
Or 
> do a calibration sequence?
> 
> Mike
> 
> 
> --- In AVR-Chat@yahoogroups.com, jay marante <jaythesis@y...> wrote:
> > when i power-up my MCU, is it possible for me to know the 
position 
> of 
> > my servo motor if it is in a 0, 90, 180, etc, degree? how?
> > TIA
> >  
> > -jay