[time-nuts] Line Frequency

[M. Simon]

Bill,

I was hoping to avoid a device that was dependent on line voltage (rather than zero crossings) for timing as it will then be line voltage sensitive (or at least more than a zero crossing detector). Of course zero voltage (zero crossing) detectors have other problems. Susceptibility to line noise being one major one. 

Simon


 
Engineering is the art of making what you want from what you can get at a profit.



On Sunday, February 9, 2014 3:25 PM, Bill Dailey <docdailey at gmail.com> wrote:
 
The PicPET is what I use.  Input is from a 5v ac transformer.  Seems simple to me. I bought a handful of these.  Love em.
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>http://www.leapsecond.com/pic/picpet.htm
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>Doc
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>Sent from mobile
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>> On Feb 9, 2014, at 7:53 AM, "M. Simon" <msimon6808 at yahoo.com> wrote:
>> 
>> This probably came up during the recent discussion of Line Frequency Monitoring but I may have missed it. 
>> 
>> 
>> Does any one have a circuit (tested - operational) for monitoring line frequency? I'd like something that checks zero crossing so that it is relatively insensitive to line voltage variations. 
>> 
>> 
>> Simon
>> 
>>  
>> Engineering is the art of making what you want from what you can get at a profit.
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