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Current leakage

Discussion in 'Electronic Design' started by Andy K, Dec 9, 2013.

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  1. Andy K

    Andy K Guest

    I test a small alarm for current leakage with the switch in the OFF position.

    It showed a drain of 2 uA.

    Is that typical ?

  2. miso

    miso Guest

    You would have to open the device to see if the switch really
    disconnects the internal circuitry. It wouldn't surprise me if there was
    a large cap on the DC input before the switch.

    You also have to determine if the switch is even a switch in the literal
    sense of the word. To keep cost down, many switches are just a means to
    send a signal to the circuitry to wake up or not.
  3. Andy K

    Andy K Guest

    The caps are not labeled, so I suspect they are bottom of the barrel stuff. :)

    I saw a procedure for determining the Farads, but it looked rather involved.

  4. Guest

    Where's it getting its power and how long was it on when you took the reading?
  5. Andy K

    Andy K Guest

    Power from 3 AA batteries

    5 Seconds before I took the reading.

  6. Robert Baer

    Robert Baer Guest

    Maybe,maybe not; how was the test done? Schematic?
  7. Robert Baer

    Robert Baer Guest

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