AVR-Chat

Thanks Larry.  That's a good idea and as soon as Jameco coughs up my
'13 chips I give that a try.


--- In AVR-Chat@yahoogroups.com, "Larry Barello" <yahoo@...> wrote:
>
> Look for ceramic resonators with built in capacitors (three terminal
> devices) at digikey.  They work pretty well.
> 
> It seems with a little thought that the pulses could be
discriminated using
> the internal oscillator.  Use the first pulse to "calibrate" the
clock with
> upper and lower bounds for "valid" and then use the calibrated values to
> measure the remaining pulse on/off periods.  The internal oscillator
will be
> extremely stable over a couple second period.  
>