[time-nuts] Recording mains frequency/phase [WAS: No GPSsatellites]

Ben Hall kd5byb at gmail.com
Sun Mar 1 18:05:16 EST 2015

On 3/1/2015 3:10 PM, Ben Hall asked:
> Using a zero-crossing detector with the picPET and logging the timing of
> each zero-crossing, how do you toss out the other 59 samples each second?

I think I figured out a very obvious way.

~60 Hz AC --> zero crossing detector --> divide by 64 ripple counter

THEN feed the output of the div by 64 counter into picPET.  It is 
logging a little less than once a minute...but 60 vs 64...

thanks much and 73,
ben, kd5byb

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