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Re: [Healeys] Austin Healey Barbie clock radio

To: "Bob Spidell" <bspidell@comcast.net>
Subject: Re: [Healeys] Austin Healey Barbie clock radio
From: "Johnsen, Bernard F (AS)" <bernard.johnsen@ngc.com>
Date: Fri, 9 Apr 2010 09:12:59 -0500
<snip>
Frequency would only affect an electromechanical clock--one driven by an
electric motor.  The Barbie clock is solid state--AC is converted to DC
for use by integrated circuits (like the LED display).  A frequency
change would have little to no effect.
<snip>

Not necessarily true. It depends on the design of the clock. Older
digital clocks did in fact count cycles from the power source, and use
divide by 60 and divide by 10 circuits to derive their timing. Later
designs used a crystal oscillator as a timing source, as you alluded to.

- Bernie Johnsen 1967 BJ8, 1977 Digital Clock (although its not a Barbie
one)
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