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DC capacitor testing

Discussion in 'Electronic Basics' started by Robert Snyder, Apr 25, 2004.

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  1. Can low voltage, say 5vac, be applied to a 25vdc rated capacitor for
    the purpose of checking the capacitance in a wheatstone bridge

    I don't have a capacitance meter but I would like to experiment with a
    bridge setup.

  2. 5 VAC peaks at about 7 volts volts each way, and that is a bit much to
    do to an electrolytic in the wrong polarity, though the damage would
    be slight with a brief exposure. It would be better to use a more
    sensitive balance meter (or an amplifier) and keep the AC down to a
    volt or so. Or design the bridge so that a DC bias voltage was added
    to the AC.
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