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

[Bob Camp]

Hi

> 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. 

Bob

> 
> 
> 
> -- 
> These are my opinions.  I hate spam.
> 
> 
> 
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.