Capacitor checking

Discussion in 'General Electronics Chat' started by project robot, Apr 21, 2008.

  1. project robot

    Thread Starter New Member

    Mar 13, 2008
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    I have a power circuit that is ticking when on. I found one of the capacitors to have a resistance measurment of 27K ohms (out of circuit). It is 1,000 uf 10Volts, shouldn't it give a larger value? I don't have a LCR meter just a crappy Radio shack piece.
     
  2. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Do you have the polarity of your meter leads on the capacitor correctly? Black lead to the - cap lead?

    Yes, that seems a bit low. But since it's a 10v cap, it shouldn't be used in a circuit that has more than 5v across it. (standard rule of thumb for electrolytic caps)
    And if it were in a 5v circuit, it would draw roughly 185 microamps, or 0.185 milliamps. That's not a whole lot of leakage. You might consider replacing it, but I don't think it's the source of your "tick".
     
  3. project robot

    Thread Starter New Member

    Mar 13, 2008
    6
    0
    Thanks for the help!
     
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