[time-nuts] NTP Clock suggestions?

Chris Albertson albertson.chris at gmail.com
Tue May 28 11:40:08 EDT 2013


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.   The clock should run at the correct
rate.  Setting will need to be done manually.   You sine wave generator
will need to check the system time every N cycles.

Next simplest is to use a small LCD computer monitor or a cheap Android
tablet.


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