I have 3.3V switching power supply. I want to power 3W RGB LED.
Forward voltages are: 2.2~2.8V(Red), 3.0~3.8V(Green), 3.0~3.8V(Blue) Current: ~350mA
Should I use current limiting resistors? As I understand, for Red I need to drop 3.3V to under 2.8V and the resistor is necessary, but how to be with Green and Blue? Can I connect them directly?