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Voodoo power suuply circuit problem

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  • Voodoo power suuply circuit problem

    Hello dear george.
    I have a problem when testing tp15 tp14 on voodoo Power supply circuit .tp15 gives 0v and tp14 gives -0.9v.
    The pic is succefully programmed and the power supply is 12v 300 w ATX of the computer.
    Here are the screenshots of my board.
    I appreciate your help.Thanks a lot
    Attached Files

  • #2
    soon i will provide a video for the problem.

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    • #3
      I still not learn voodo yet, it quite amount work, but I don’t understand. Voodoo is expensive device why do you put such ATX power supply, the amount current draw will be big above 4 amps for 12V. Why not use battery first

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      • #4
        Originally posted by fathallah View Post
        Hello dear george.
        I have a problem when testing tp15 tp14 on voodoo Power supply circuit .tp15 gives 0v and tp14 gives -0.9v.
        The pic is succefully programmed and the power supply is 12v 300 w ATX of the computer.
        Here are the screenshots of my board.
        I appreciate your help.Thanks a lot
        If you have 0V at TP14, then you have a very basic problem as this voltage should be -5V. Without this voltage the PIC is not being powered.
        Have you checked that there is 12V coming into the PCB, and that you can measure -12V between TP1 and -VB (after the FQT7N10 mosfets)?

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        • #5
          have a problem on power suply
          tp14 = -5V
          tp15 = -0V
          tp1 + (-VB) = -12V
          Click image for larger version

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          • #6
            Originally posted by nandimonay3 View Post
            have a problem on power suply
            tp14 = -5V
            tp15 = -0V
            tp1 + (-VB) = -12V
            Is the PIC processor programmed and its clock to the LT1054 running?
            You need a scope to check the clock.

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