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  1. N

    fault DC 220V

    help me! I have power suply DC 220V in Electronic station  and disconetor with group but now fault group , help me detector at group fault DC +220V but not off power suply
  2. N

    Converter LED to LCD

    Hi ! help me ! I have a  display metter by LED . I want to change display to LCD. Because I work outdoor so I can't see it.
  3. N

    Fixed current power supply 100A DC

    I need design a fixed current power supply DC 100A, about 200W, help me thank you !
  4. N

    circuit converse High voltage AC to DC

    Hi ! I want design circuit converse High voltage AC to DC, about 50KV ac . Help me.
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