Ok. So I need to run a set of 4 LEDs off the 12v DC 3.25 Amp Gamecube power supply. This would be alot more straightforward if the LEDs were the same voltage. Well.. They aren't. I need to run the set of LEDs in this order:
1.7v, 20 mA -> 3.7v, 20 mA -> 2.1v, 20 mA -> 2.1v, 30 mA
I'm a little inexperienced in the resistor department, and am not sure how I should go about calculating this out...
read about kirchoff's current law