How to make this work

Discussion in 'The Projects Forum' started by what66, Aug 14, 2010.

  1. what66

    Thread Starter New Member

    Jul 21, 2010
    Hello all I have a project I need some help with I want to make a led bar Indicator For a voltage source 3.3-11.3 can I mod this circuit for it
    I'm using a power rheostat to control field current on my alternator welder.
    I just want a visual indicator for it any help would be fantastic thanks.:)
  2. Bernard

    AAC Fanatic!

    Aug 7, 2008
    Look up data sheet on LM391N, application as bargraph volt meter. or Forrest M Mims III, Engineer's Notebook II.