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luxeon

Luxeon Leds - what would be the simplest constant current driver for them

led5.jpg

I have just bought 5 of these 3W High-Power LEDs 

I could drive them off batteries direct ....

...however i would prefer to feed them with a "constant" but adjustable (350mA-750mA) current.

 

What would be the simplest circuit i could use ?.....

.... and would there be a way to PWM them?. 

 


Specs :-

3W High-Power White (6000-7000K) 130 Lumens - 140 deg