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Setting a Typical Electric Clock to Accurate Seconds

W

W. Watson

Jan 1, 1970
0
Is there anyway to do the above (Subject). Perhaps plugging it in as an
accurate time source reaches 0 seconds?

Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
(121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet
 
J

JeffM

Jan 1, 1970
0
Is there anyway to do the above (Subject).
Perhaps plugging it in as an
accurate time source reaches 0 seconds?
Wayne T. Watson

I do have one such clock (very old General Electric clock radio).
All other units I have encountered
will zero-out Seconds when Minutes is changed.
 
W

W. Watson

Jan 1, 1970
0
JeffM said:
I do have one such clock (very old General Electric clock radio).
All other units I have encountered
will zero-out Seconds when Minutes is changed.
Interesting. I hadn't thought of it that way. That is, synch the clock to
the actually zero seconds by starting the process when the real zero seconds
approach. I'll try it.


Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
(121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet
 
M

Mr. C

Jan 1, 1970
0
All other units I have encountered
will zero-out Seconds when Minutes is changed.

Some are worse than that. They never zero the seconds when the time
is set. You could actually set the hours and minutes and see the
minute value change a few seconds later. No chance of ever getting
those kind to be accurate to the second.
 
B

Bob Masta

Jan 1, 1970
0
Is there anyway to do the above (Subject). Perhaps plugging it in as an
accurate time source reaches 0 seconds?

If you are talking about an "old fashioned" plug-in-the-wall
clock with a synchronous motor, your method should work OK.
Such clocks keep outstandingly good time because the
power company counts the cycles and keeps the average
dead-on over long periods. About the only thing you will
have to deal with is any initial backlash in the gear mechanism,
which might require a couple of trial starts depending on
how close you want to get.
Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
(121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet

Hmmm, as every caver knows, you need to put that knot
at the end before you even get on the rope in the first place!

Best regards,


Bob Masta
dqatechATdaqartaDOTcom

D A Q A R T A
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Home of DaqGen, the FREEWARE signal generator
 
J

JeffM

Jan 1, 1970
0
All other units I have encountered
Some are worse than that.
They never zero the seconds when the time is set.
That's what I thought Wayne was talking about.
See my *General Electric clock radio* comment.
..
..
You could actually set the hours and minutes
and see the minute value change a few seconds later.
No chance of ever getting those kind to be accurate to the second.
You have to unplug it long enough to let it forget what time it is,
plug it back in at :00 seconds (as Wayne said),
then set the time.
 
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