- Sun Mar 14, 2010 11:11 pm
#96223
I'm wanting to make a little indoor greenhouse using some of the 1 watt LED's. I don't want a want to figure out voltage drops and resistor values when manufacturing differences would make things tricky to do, especially since I'm not sure what voltage level to use, 12V, 19V like a laptop ps, or 24V which I have available. The LED's would be in series as much as possible of course. But an LM317 with a 3.6 ohm resistor would work perfectly over a wide range of voltages and keep working properly if an LED shorted out bad.
Plus it'd be much cheaper to buy than the $15 constant current sold, and could have multiple versions for different LED's.
Plus it'd be much cheaper to buy than the $15 constant current sold, and could have multiple versions for different LED's.