LED's, Resistors, and Potentiometers Answered
I"m having some trouble with my LED and pot.
My LED is a white 2.1v / 30mA
My power source is 2 AAA batteries in series at 3v
my pot says 500K on the back and three leads labeled 1, 2, 3
When my pot is at the off position, my LED is lit up perfect. but when I slightly turn the dial my LED starts to burn out and turns bright orange, and if I turn the dial further (Or let it sit for a minute) my LED turns bright red.
I know that's ruining the LED...
But what I'm dying to figure out is how do I know what resistors I would need to use with the pot, What's the math?