[time-nuts] Simple AC mains zero-cross detector
kb8tq at n1k.org
Wed Dec 17 07:44:08 EST 2014
> On Dec 17, 2014, at 3:27 AM, Hal Murray <hmurray at megapathdsl.net> wrote:
> 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?
or a nanosecond …
Obviously it would depend on just what your system needed to do and the signal to noise on the 60 Hz input.
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