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Thread: quick question re: laptop power

  1. #1
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    quick question re: laptop power

    i've got a laptop power supply (cigarette converter) and it's output it 16v, max 4amps. my laptop takes 15v, 4amps. will the extra 1v do damage? or will i be safe to use it?

    if no, could i cut down the voltage with a resistor or something?
    cheers.

  2. #2
    Maximum Bitrate mushin's Avatar
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    It probably would work, but I wouldn't risk it, and it could shorten its life even if it worked fine at first. I believe you should be able to use a diode to get the desired voltage drop - but I'm no expert in these matters, so do some research first or wait till the experts around here chime in.

  3. #3
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    thanks for the reply.
    i was fairly certain that it'd work, but as you said, it might do long term damage to some of the more sensitive parts...
    i'll check what the actual voltage is tomorrow when i can get to my multimeter.

  4. #4
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    no-one else?

  5. #5
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    bump, pretty please?

  6. #6
    Variable Bitrate choyak's Avatar
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    YOu would need a diode rated at least 10 amps, the diode should reduce the voltage by 0.7 volts and the 0.3 volts remaining will not do anything or else use a regular diode and a schottky diode to get about 1 volt. (the schottky is about 0.4 volts)
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  7. #7
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    thanks heaps!
    so i shouldn't risk the 1v?
    guessing i wire them up in series with the positive (red) wire?
    bare with me, i don't know too much.

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