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24v universal power adapter

Discussion in 'General Electronics Discussion' started by blackfranics75, Feb 2, 2010.

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  1. blackfranics75


    Feb 2, 2010
    I have a nexxtech 24v universal power adapter. The end of the DC lead has two holes (for the plug), with - marked on one of the holes. The plug adapter I'm plugging into it has + and - marked, but these are on either side of the prongs that plug into the adapter, so I don't know which of the two prongs should line up with the - sign on the adapter end. How can I determine this?
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    First determine what your device requires (it's typically centre positive)

    Then connect the plug either way around and use a multimeter to determine if the centre is positive or negative. If wrong, disconnect the plug, rotate 180 degrees, and reinsert.

    Once you've found the correct orientation, mark both the plug and the adapter so you will know next time.
  3. blackfranics75


    Feb 2, 2010
    thanks, I'll try that
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