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Please help with battery desulfator circuit

Discussion in 'Electronic Basics' started by Eric R Snow, Aug 2, 2004.

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  1. Eric R Snow

    Eric R Snow Guest

    I'm going to build the battery desulfator circuit described here: . Looking at the schematic
    it appears that C1 and C2 are electrolytic capacitors. Can the other
    capacitors be disc ceramics? Or is there a better choice? Finally,
    what kind of device is Q1?
    Thank You,
    Eric R Snow
  2. Make that C1 and C4.
    I doubt that any of these are critical. Ceramic, of film should do
    fine. If you use ceramic, just use ones that have a voltage rating at
    least double the expected voltage. Some kinds of ceramic caps have a
    big drop off of capacitance as the rated voltage is approached.
    It is a metal (gate) oxide isolated field effect transistor, N channel
    (positive gate voltage turn on).
  3. Eric R Snow

    Eric R Snow Guest

    Thanks John. And I really meany C1 and C4 but somehow my finger typed
    C2. Hmmm.... Can you tell me if this device from Fairchild will work
    instead of the IR part? .
    Mouser doesn't carry the IR part and I don't know enough to decide
    which of 33 Fairchild parts will work. Also, Do you know of an on-line
    source that expalins how to wind your own inductors accurately and for
    a novice? I've looked but haven't had any luck.
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