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Thread: xenarc doesn't need regulated power?

  1. #21
    phc
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    Quote Originally Posted by Curiosity
    Someone should check to see what's on the board close to where the power comes in. It just might be a good regulator and you're all worrying too much.
    Well, there is not a really ovious "good regulator", but here is my take.

    Pwr input connector - to 1N582_ - 3A Schottky Diode - then small cap to ground, fat (~.030" ) track around the board - all the way to the other side, into what looks like a fuse (perhaps a Raychem Polyfuse?)

    After that, it enters the land of big caps, an inductor and another big diode, 1N5822, and a bunch of SOIC components and a SOT-23 or two - a clear indication of switching regulators.

  2. #22
    What can I say? I like serial. Curiosity's Avatar
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    Sounds good to me, still I guess it's not a definitive answer? The lilliput has a 12V switching regulator close to the power input and yet it has an external one as well. Too confusing. What does the lighter adapter have in it? If that was directly wired, you would have to assume it's OK.

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    I'm sorry, and you are....? frodobaggins's Avatar
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    Quote Originally Posted by Scouse Monkey
    indeed - but i aint got a clue about electronics.
    lol, ok
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    MySQL Error Scouse Monkey's Avatar
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    Quote Originally Posted by frodobaggins
    lol, ok

    i wondered when someone was gonna mention that! Trust you baggins!

  5. #25
    phc
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    Quote Originally Posted by Curiosity
    Sounds good to me, still I guess it's not a definitive answer? The lilliput has a 12V switching regulator close to the power input and yet it has an external one as well. Too confusing. What does the lighter adapter have in it? If that was directly wired, you would have to assume it's OK.
    The Lilliput lighter cable box has a fuse and a power filter (3 caps and an inductor). There is no regulation in it.

  6. #26
    What can I say? I like serial. Curiosity's Avatar
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    The lilliput egg? On top there are 3 caps, LM2595S switching regulator, inductor on top (you would need something pumping that inductor, right?) 1 diode, 2 resistors, 1 cap on bottom (all SMD).

  7. #27
    phc
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    Quote Originally Posted by Curiosity
    The lilliput egg? On top there are 3 caps, LM2595S switching regulator, inductor on top (you would need something pumping that inductor, right?) 1 diode, 2 resistors, 1 cap on bottom (all SMD).
    The eggs that shipped with Lilliputs in the past, perhaps. The latest Lilliputs just have the fuse and fillter in a black cubic box. Switching regulator on board now I presume.

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