🚀 go-pugleaf

in article <3622@cisunx.UUCP>, nf165636@cisunx.UUCP (meyers     m) says:
> How do the clocks (and clock radios) that run on main power (110/60 Hz)
> count the time ? Especially those that use battery backups. In this case
> do they use a quartz crystal ? Does that mean that these can be used
> on 110/50 Hz or any other frequency ? Any info will be appreciated.

AC driven clocks generally get their clock timing from dividing-down
the 60Hz to the 1Hz seconds-clock.  Some clocks have a little circuit
that allows the clock to ride-out short power failures.  Often it is
a cheap, low accuracy oscillator that "locks" to the 60Hz (when available)
and self oscillates at about 60Hz when the line power is gone.

Most crystal driven clocks are battery-only.  Note, I said most.
So, in general, if it plugs into the wall, it won't work too well
in other countries with 50 hz.  (Some have a switch for 50/60Hz, though).

Gary