5" screen power conversion

Discussion in 'Screens' started by Turd Ferguson, Apr 2, 2018.

  1. Turd Ferguson .

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    I picked up a backup monitor on Amazon to use in a portable project. I have attached a shot of the control board. This thing currently runs on 12v.
    I'm guessing that it converts this to 5v and can be wired to run off a 5v supply.
    Can someone look at this and suggest where I can apply 5v?

    Thanks! monitor pcb.jpg
     
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  2. jefflongo Broke BitBuilt .

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    CAREFULLY check the output of this pin with a multimeter. Be sure not to accidentally short anything. You should be able to probe the inductor it's connected too alternatively.

    [​IMG]
     
  3. Turd Ferguson .

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    I was guessing pin #3 from the chip documentation. There is 5v there. Do I leave it alone and just apply 5v there, or do I need to separate that pin from the board?
     
  4. jefflongo Broke BitBuilt .

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    You can apply 5v there as long as you are no longer supplying 12V to the input. Better to remove the IC as well if you're forcing an output on there.
     
  5. Turd Ferguson .

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    Thanks for the help.
    5v directly to that pin and it worked perfectly!
    I was amazed at how small the board was for this screen. I was expecting a much larger separate pcb to deal with. It only takes up about 15% of the back surface of the screen and lays pretty flat.
     
    Last edited: Apr 2, 2018
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  6. cheese the tallest memer in town Staff Member . . .

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    I feel like you've already posted it, but do you have a link to that screen? Looks pretty neat
     
  7. Turd Ferguson .

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