Calculate Current

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Discussion in 'Homework Help' started by rohanbhatia, Mar 15, 2012.

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  1. Mar 15, 2012 #1
    rohanbhatia

    Thread Starter New Member

    Mar 15, 2012
    1
    0
    Hi... I just started embedde3d C at uni and the prelim work had this question... i dont remeber much from my first year at uni so would appreciate the help.... These are the 2 questions....

    ​
    1. How much current will the LEDs draw?
    2. How do we make the Z8 supply this current from these pins?
    [​IMG]
     
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  2. Mar 15, 2012 #2
    jtrent

    New Member

    Mar 11, 2012
    26
    4
    OK, to calculate the current in your circuit, I am making a couple of assumptions.
    1. To light your LED, you are placing ground or zero volts on the cathode of the LED
    2. The voltage drop across the LED is approximately 2 volts
    see my full comments here
     
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