Powering a 10W LED SMD Chip ?

[C-NUMB]

Thanks, here also usefull information:

LED driving and controlling methods

Yes, they get hot very quickly without heat/termal sink.


This seams to be a versaltile pice, voltage in/out and current is adjustable, and price delivered
about 3 euros. But again no idea about the quality....Instructions in totally not understandable chinglish..will order a few to test.

[doggypaddle]

Originally Posted by nik

If you have a soldering iron, this seems a cheap solution.

Super simple high power LED driver

Thats the best simple way to do it, a simple current sink from a 317 chip.
a resistor will work but as battery voltages varies from 10.8 to 15 volts (worst case) you wont have a very stable light output.
just look at the Vf/Current for an LED, they are more or less a voltage reference, therefor must be driven by a constant current. a resistor is a very bad way of doing this . (unless you have a very big resistor and high voltage battery!!