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how to reduce speed/ amplitude of electronic pendulum??

Discussion in 'Electronic Repair' started by Bill Walston, Oct 11, 2012.

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  1. N_Cook

    N_Cook Guest



    Perhaps you could gate the output drive by a divide by 10 counter on the
    clock ouput and only power kick every tenth swing of the pendulum. Would
    conserve battery and perhaps less amplitude of swing
     
  2. What you say makes sense -- but the drive circuit will always compensate
    ALL pendulums oscillate at their native frequency. They can't help but.
    You're missing the point. The pendulum presumably drives the clock gears. If
    all you care about is "efficiency", switch to an all-electronic clock with
    an LCD.

    If you're going to power the pendulum electronically, it makes sense to have
    a system that keeps the pendulum running at the "right" frequency. The
    system I described allows the pendulum frequency to be tweaked without
    mechanical adjustments.
     
  3. Guest

    Only true if you add the qualifier 'if there are no additional
    forces'. A great deal of effort is required to ensure this is true.
    Did you ever wonder why the best Grandfather clocks use weights to
    provide power?

    In a happier time my wife decided we needed a real pendulum clock on
    the mantle of our new (to us) home. She picked up one (made in Korea)
    that required monthly winding. With a little care I could adjust it
    so it was correct at the begining of the month and again at the end of
    the month. The force provided by the spring changed depending on how
    tight it was, this changed the force on the escapement, which changed
    to force applied to the pendulum. The clock would gain time at the
    beginning of the month and lose it toward the end of the month.

    Look attractive? Yes. Sound good? Definitely. Keep good time - no
    way.

    PlainBill
     
  4. What you say makes sense -- but the drive circuit will always
    compensate
    No, I never wondered, because I knew why. And it's energy, not power, by the
    way.
     
  5. N_Cook

    N_Cook Guest

    Thats why fusees were invented, but could only compensate to a certain
    extent
     
  6. units analysis ... probably isn't the right term, but I can't think of
    what it is.
    That's it! Thank you.
     
  7. Leif Neland

    Leif Neland Guest

    Efter mange tanker skrev N_Cook:
    Not all people "run slow". Some "run fast". These are the people with
    the nasty habit of waking up at 5AM pestering the other half until the
    early birds go to sleep when the late risers want to have fun.

    If you are locked in the office/shop/factory all the hours with
    daylight, and never seeing the light of day during the winter, you can
    get depressed; this can be reduced by, in the morning, looking into a
    strong "wake-up-lamp" designed to have the spectrum of sunlight.
     
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