[time-nuts] Simple AC mains zero-cross detector

Hal Murray hmurray at megapathdsl.net
Wed Dec 17 03:27:33 EST 2014

csteinmetz at yandex.com said:
> That one is not ideal for this task, because (i) its output pulse is
> symmetrical about the mains zero cross, and (ii) the hysteresis zone  is not
> well characterized and will drift with temperature and input  voltage.  So,
> there is no edge that is well characterized in relation  to the AC mains
> zero cross. 

What are you going to do with data from the line accurate to 1 microsecond?

These are my opinions.  I hate spam.

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