LCD panel meter

Discussion in 'General Electronics Chat' started by 6thplanet, Feb 21, 2009.

  1. 6thplanet

    Thread Starter Member

    Jan 1, 2008
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  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    If it requires a separate ground for the power, then it's not going to change. You may need a different panel meter.
     
  3. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
    5,692
    901
    It depends on the meter you have. I converted a Martel meter to common ground using an ICL7660 chip to generate +/- voltages. I also have an MPJA meter. It is a pretty tight package and would be difficult to modify. The change I needed to make to extend the range was done on an accessory board.

    What information can you give us about your meter? If you have the meter already, can you see which chips are in it?

    John
     
    Last edited: Feb 21, 2009
  4. 6thplanet

    Thread Starter Member

    Jan 1, 2008
    13
    0
    The chip they use is covered in a black hard sealant. Guess I'll just use a battery to power it and use a relay to switch it on and off in the car. Thanks.
     
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