[time-nuts] Digital Clock kit - no Integrated circuits!
hmurray at megapathdsl.net
Sat Jan 9 22:27:44 UTC 2010
phk at phk.freebsd.dk said:
> That is what was known as a "synchronous clock". Tom has one running
> off his atoms on his web-page...
When I was a kid, I took apart my share of clocks and/or clock radios.
They all had the same basic mechanism. It was a shaded pole motor with a
semi sealed unit that included the first layer of gears. I never took apart
one of the units. I assume the rotor had a permanent magnet so it would run
synchronous to the line frequency.
That was 50 years ago.
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