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