High current LED's

hi there all

for one of my projects I'm looking at using multiple high current RGB LED's, 3W LED's where each colour is 1w. I know Arduino cannot cope with that so i need something between the two - i looked at a Darlington array ULN2803A but that has a maximum of 500mA - i think i need 1A of more.

Any other idea's on how to amplify the PWM signal - or any other ways of doing it?

Many thanks Matt

You can't just switch a high current LED like you can a low current one. You need to use a constant current driver. Either purchased or one you make yourself.

Check this out:


(step 8 ).

I 've tried it out with an Arduino and works quite well.

I used this https://www.sparkfun.com/products/10256 like this http://bildr.org/2012/03/rfp30n06le-arduino/

To run my 20W led. Works great with PWM.