Need help understanding how LM3914 Works

Discussion in 'The Projects Forum' started by Johnny Ace, Jun 11, 2011.

  1. Johnny Ace

    Thread Starter New Member

    May 24, 2011
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    I am currently looking at the datasheet for the LED driver and i want to create a circuit that does the same thing as the one shown on page 11.
    http://www.national.com/ds/LM/LM3914.pdf

    I will need to alter the range (Vd) quite often so i wanted to make sure i am understanding the connections correctly (specifically, the circuitry inside the driver [Refout, Ref adj))
    I am going to make a generic equ for picking resistor values for a specified Vd


    Here is my understanding of the circuit on page 11
    View attachment Draft1.pdf
     
  2. KJ6EAD

    Senior Member

    Apr 30, 2011
    1,425
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