With Instructables you can share what you make with the world, and tap into an ever-growing community of creative experts.
We have a be nice comment policy. Please be positive and constructive.
We noticed you attached photosto your comment.
The brute-force version is to switch the LEDs with power darlingtons, and stick a hefty half-watt ballast resistor on each LED.
A better solution is to use a constant-current regulator. There's a cheap regulator made for HR-16 lighting fixtures, based around the PT4115 chip; you can find those cheap at the discount suppliers: http://dx.com/p/internal-constant-current-source-p...
The cute thing about these is, the PT4115 has a PWM pin (not used in the cheap constant-current drivers). You can solder a whisker to that and you've got your LEDs.
I'd also caution that the Arduino's power supply won't want to do this kind of heavy lifting either.
You will need a driver board for each LED.
Posted:Mar 5, 2014
Join 2 million + to receive instant DIY inspiration in your inbox.
Download our apps!
© 2016 Autodesk, Inc.