Need help understanding how LM3914 Works

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Johnny Ace

Joined May 24, 2011
2
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
 
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