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Setting a Typical Electric Clock to Accurate Seconds

Discussion in 'Electronic Basics' started by W. Watson, Feb 20, 2006.

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  1. W. Watson

    W. Watson Guest

    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
     
  2. JeffM

    JeffM Guest

    Is there anyway to do the above (Subject).
    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.
     
  3. W. Watson

    W. Watson Guest

    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
     
  4. Mr. C

    Mr. C Guest

    All other units I have encountered
    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.
     
  5. Bob Masta

    Bob Masta Guest

    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.
    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
     
  6. JeffM

    JeffM Guest

    All other units I have encountered
    That's what I thought Wayne was talking about.
    See my *General Electric clock radio* comment.
    ..
    ..
    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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