For a little art project I have to individually control a couple of CREE Q5 high-brightness LEDs with DMX. You can run them between 700-1000mA and therefore the LEDs have to be heat-sinked. If I run them at 12VDC and use a current limiting resistor it has to be a pretty big resistor Wattage wise and heat-sinked as well. New flashlights use the same LED with a step-up converter so you can run the flashlight even from a single 1.5V battery. I could just use the driver circuit from a flashlight and then DMX-control the brightness via an external DMX driver circuit. I tested this and it works flawlessly. I’ve been told, though that those step-up converters don’t really like external input from DMX drivers. As mentioned before it works but might not work for long… In order to avoid those big heatsinks that might even need a cooling fan I was wondering if there is another current limiting circuit out there that would dissipate all the heat generated without a heatsink and can handle external input from a DMX driver? Another option would be a current limiting / heat dissipating AND DMX driver combo circuit that directly accepts DMX data input. This is for a super-low budget project so price is key… Any ideas?
Thanks for your help in advance,