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Topic: High current LED's (Read 737 times) previous topic - next topic


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


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
like this

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

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