how to fix light in series ?

Discussion in 'General Electronics Chat' started by alwqas, Jan 20, 2013.

  1. alwqas

    Thread Starter New Member

    May 7, 2012
    4
    0
    hello

    i need some help in circuits

    if there number of lights in series- say 10- and one of it has a problem
    how can i find that light of?
     
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,966
    744
    In the circuit look for the break in the chain of the lights using a voltmeter, the faulty bulb will have the supply on one side and Zero on the other.
     
  3. crutschow

    Expert

    Mar 14, 2008
    12,977
    3,220
    To speed things up you can do a sort of "successive approximation" type of test.
    Go to the middle bulb first.
    If there's power, go to the middle of the lower half (towards common).
    If there's no power, go to the middle of the upper half.
    Continue this process until you find the failed bulb.
     
  4. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
    6,357
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    The Quicksort method. :D

    [​IMG]
     
  5. crutschow

    Expert

    Mar 14, 2008
    12,977
    3,220
    That's the word..;)
     
  6. ErnieM

    AAC Fanatic!

    Apr 24, 2011
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    I have a magic Christmas light sensor. You place a bulb within it's sensor and if there is voltage getting to it it beeps when you press it's button.

    When you find the first bulb in the chain that doesn't beep... fit the bulb just before it.

    (I call it magic as I have no idea what principle by which it works, but work it does.)
     
  7. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,669
    804
    If you think the problem is just ONE broken bulb, then you get a new one, then replace the first bulb in the row. If that doesn´t help, you put the bulb you took out instead of the next one. Repeat until it works, or until you reach the end.
    If you reached the end wihtout success, then there is either more than one bulb broken or the wiring is bad.
     
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