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mobile EFTPOS battery power supply

Discussion in 'Power Electronics' started by mark krawczuk, Dec 25, 2019.

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  1. mark krawczuk

    mark krawczuk

    Dec 17, 2015
    this is a eftpos charger from a vehicle. but looking at the input dc to the charger there is two seperate negatives... to the left you can see the red wire to charge sla battery , but the negative doesnt connect up to anything , just goes to the green power connector, can i just join both negatives together ?. i want to use it to power a low voltage led light.

    Attached Files:

  2. Bluejets


    Oct 5, 2014
    might be a split supply.... +12v ..Common....-12v

    What is on the other side of the board....?
    What does the power in unit look like.....?
    davenn likes this.
  3. Electro Bro

    Electro Bro

    Nov 22, 2019
    Could you please offer more information? Rated current and voltage?
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