Off topic, but .... I've never heard of the power frequency (60Hz)
'sliding' off, at least not here in the States. The voltage can drop
from an overload--i.e. a 'brownout'--but the only thing that could
change the frequency is generator speed changing. Since all the power
producers--hydro, wind, gas, coal, nuke--are tied together in a grid
they are precisely synchronized.
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. Most modern electronics have
switching power supplies--they rectify the AC to DC then smooth the DC
with capacitors and step it down--converting back to AC or pulsed DC
then back to DC--as required (+/- 3V, 5V, 12V, etc.).
bs
Josef.Eckert@t-systems.com wrote:
> The Barbie clock radio is frequency triggered. It works well with a constant
> 60 Hertz frequency. In Europe with a 50 Hertz frequency or when the frequency
> slides off because of overload in the power supply system the clock could not
> keep the time anymore.
>
> Josef Eckert
> Konigswinter/GERMANY
>
--
*******************************************************************
Bob Spidell San Jose, CA bspidell@comcast.net
*******************************************************************
_______________________________________________
Healeys@autox.team.net
Donate: http://www.team.net/donate.html
Suggested annual donation $12.75
Archive: http://www.team.net/archive
Forums: http://www.team.net/forums
|