[time-nuts] 50/60 Hz clocks

[Robert LaJeunesse]

Poor man's solution: Use an Arduino to read the Thunderbolt 1PPS and lock a 50Hz 
(or 60Hz) square wave to the 1PPS. Any resulting jitter can likely be kept in 
the tens of microsecond range, easily filtered out by the clock mechanics. 
Filter the square wave a bit and feed it into an audio amplifier (or two) of 
sufficient power to run the clock. (Possibly a 12V powered bridge amplifier at 
~14W would be adequate?)  Use some sort of audio output or filament transformer 
backwards to create the proper line voltage to run the clock. Maybe run the 
whole thing off a 12V battery with float charger for uninterruptible timing.

good luck

Bob L.

________________________________

From: Cezary Rozluski <cpr at igf.edu.pl>
To: time-nuts at febo.com
Sent: Thu, March 10, 2011 4:54:37 PM
Subject: [time-nuts] 50/60 Hz clocks

...
Let us suppose I have Thunderbolt (I really have one)  as a time/frequency 
source, but any other time-nuts recognized frequency source should by sufficient 
for the fun to drive old 50/60Hz stuff with the highest precision available (and 
for fun, comparable to www.leapsecond.com  solution, modulo cesium/hydrogen 
clock).  It would be very nice to see correction for leap seconds as well :-) 
:-)

Regards,

Cezary
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