Only 1 LED is ever on at one time so I figured if I power them all in parallel from the rail I could just use a single resistor to supply that rail to limit the current and drop the voltage to what I need for all the resistors.
Yea if only one is on at a time, then no problem at all.
But if more than one is on at a time . . . lets say one LED has a resistance of 0.000001 ohms and the other 0.00001 ohms (because of manufacturing tolerances). You'd think, oh no big deal, the difference is tiny. But actually one has 10x the resistance as the other, and then that's where the problems arise. 10x the current goes through one over the other.
But if you put resistors with it, say a 201 ohm and a 199 ohm, then its a tiny current difference.
Im going to be staying at Jaimie Mantzels place in vermont for like a week so I wont have internet access for the duration. I plan on leaving in like 8 hours or so....
I'm leaving for Laos tomorrow, and will also be gone for a week. Won't be online much . . . 3rd world countries and all . . . rice paddies here I come! hehe