The Luxeon emitters / stars are my choice for lighting, now I'll have to build a test circuit with them. Is it possible without destroying them to limit current with a resistor like with normal LEDs?
I know a switching power regulator is a better idea in terms of wasted power (creating heat) and that will be the way to go once I build the last prototypes and the final modules. But to make it easy for now, I thought resistors will do the trick.
The values I calculated for 5V Vcc are:
2.85V, 350mA LED - 2.15V drop needed - 6.14 Ohms
3.42, 350mA LED - 1.58V drop needed - 4.51 Ohms
So driving them with 6.8 Ohms and 4.7 Ohms should be safe. - Are my calculations correct or will I fry 25 EUR of LEDs if I use resistors?
Edit: I did read both the Emitter and the Star datasheet, there's no big difference to ordinary LEDs except the current, and ordinary LEDs definitely can be driven with resistors...