[time-nuts] NTP Clock suggestions?
hmurray at megapathdsl.net
Tue May 28 14:55:38 EDT 2013
albertson.chris at gmail.com said:
> OK, the LOWEST cost option I can think of for driving an analog clock with
> millisecond accuracy. Buy a normal AC powered clock that uses a
> synchronous AC motor that runs off the 60Hz AC power, not a battery powered
> clock. Then have your NTP disciplined computer generate a 60Hz audio sine
> wave. Amplify the sine wave to 12 volts then use a small 12:120 volt
> transformer to step up to 120VAC. ...
Can you still get those clocks? I haven't seen one in a while, but I haven't
I just poked "Alarm Clock" into google. The first few hits were internet
stuff. Next was Amazon. Their page had roughly 20 clocks, but only a few of
them had hands and they didn't run off the wall.
Another approach would be to connect the stepper motor coils from a battery
operated clock to your favorite small processor, and clock that chip with 10
MHz from your GPSDO. I think I've seen a web page on that stuff, but I don't
These are my opinions. I hate spam.
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