I V graph for LED light

Discussion in 'General Electronics Chat' started by Hurt_it_Circuit, Oct 23, 2012.

  1. Hurt_it_Circuit

    Thread Starter Member

    Oct 2, 2012
    I am told to graph voltage across an LED vs. the current through it. Which means putting voltage on y-axis and current on x-axis correct? I looked online at graphs of this and I only found current vs. voltage graphs of LEDs. So does a V I graph even makes sense or say anything ?
  2. MrChips


    Oct 2, 2009
    What is the difference between an I-V curve and a V-I curve?
  3. Hurt_it_Circuit

    Thread Starter Member

    Oct 2, 2012
    Nothing really one the VI is logarithmic while IV is exponential. They are inverses of one another. IV says as voltage increases current goes up exponentially. VI says as current increases voltage goes up logarithmically. That is the only difference I see. I just did not see any much of anything on VI curves but I saw a lot of info on IV curves. Which kind of threw me off.
  4. electron_prince

    Active Member

    Sep 19, 2012
    For me, its a "tradition" to put Voltage on the x axis and Current on the y axis. And I ought to respect the tradition.

    btw, led is a diode.