Need an Expanded scale volt meter cct

Discussion in 'General Electronics Chat' started by Damien, Dec 12, 2007.

  1. Damien

    Thread Starter New Member

    Jun 6, 2007
    6
    0
    The meter on my mobility scooter sits at 26v even when the batteries are dead flat, the driver has died is my guess.
    I'm looking for a schematic for a 4 to 6 Led read out covering 22v to 26v or there abouts or perhaps a drive cct for an LCD meter covering the same range.
    Building it won't be a problem my son & I both have Assoc Dip in electronics.
    If anyone can point me to a circuit, it would be much appreciated.
    Cheers Damien.
     
  2. JoeJester

    AAC Fanatic!

    Apr 26, 2005
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  3. Damien

    Thread Starter New Member

    Jun 6, 2007
    6
    0
    Thanks Joe that will do nicely :D
    Cheers Damien.
     
  4. David Bridgen

    Senior Member

    Feb 10, 2005
    278
    0
    Not exactly an answer to your particular requirement. i.e. using l.e.ds, but I once made an expanded scale voltmeter by sticking a 10V zener in series with a milliameter and multipier R to measure from 10 to 16V for a garage mechanic.
     
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