[time-nuts] Simple AC mains zero-cross detector
Chuck Forsberg WA7KGX
caf at omen.com
Wed Dec 17 09:46:24 EST 2014
Seems to me CFLs and other loads switching on and off would affect the
60 Hz waveform
enough to make microsecond measurements meaningless.
On 12/17/2014 01:03 AM, Charles Steinmetz wrote:
> Hal wrote:
>> What are you going to do with data from the line accurate to 1
> Me? Nothing. I don't find the meanderings of the mains frequency all
> that interesting, aside from observing them from time to time via the
> sweep second hand of a synchronous wall clock. But lots of other
> folks do (including our fearless leader, tvb), and they like being
> able to correlate grid events to single-digit uS (lightning strikes,
> sections of the grid going out, etc.). That said, I didn't slave away
> trying to get the ZCD jitter below 1uS -- I anticipated that it would
> be, just because there's nothing in the design to prevent it, so I
> wasn't surprised when it worked out that way.
> Best regards,
> Everything works if you let it.
> Corpus C. Redfish
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Chuck Forsberg WA7KGX caf at omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
Omen Technology Inc "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430
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