Quote:
Originally Posted by Calvinguy
And you never mount a LED directly to a power source. You need a resistor also, size of R (resistance) depends of I (current).
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and depends on voltage too.
V=IR
Where V is voltage, I is current and R is resistance. And to find resistance you need to know if its a series or a parallel curcuit, as resistances dont just add up.
there are some LEDs you could hook right to some batteries. But not most.