Well a funny thing happened on the way to water sprinklers, ball field lights etc. The silly things use motorized timers. So they will tend to drift. Though modern sprinklers should be micro controlled to god knows what reference. (poor is a guess) But there are lots and lots of those controllers no one pays attention to. Typically in office building electrical closets.
On Wed, Jun 29, 2011 at 10:53 AM, Tom Van Baak <[email protected]> wrote: > Chris, > > Sounds good. Somebody that's interested or knows NTP (not me) > can be the first to set up a mains frequency timed PC, publish > fancy MRTG plots on the web, and watch the TEC test in July. > > Realize this is all just for fun. TEC should have zero impact on > modern computer networks. The last system I worked with that > relied on 60 Hz power for timekeeping was a 70's PDP 11/34. > > /tvb > > ----- Original Message ----- From: "Chris Albertson" < > [email protected]> > To: "Discussion of precise time and frequency measurement" < > [email protected]> > Sent: Tuesday, June 28, 2011 4:06 PM > Subject: Re: [time-nuts] TEC party file format? > > > The Linux or BSD pulse per second interface is general enough to work for > this. > It does not care if the pulses are one per second or 100 per second, or 60. > > Al it does it capture a timmer/counter when a pulse comes in. Then > fets a flag a user program can read that says "data available". The > user level programs reads the device ad gets the captured counter > value, the flag is reset. Very simple and very low overhead. > > I think the counter units are nanoseconds > > > > ______________________________**_________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
