12.5 Volt Battery To 11 Volt LED Fixture
Brand new 28 watt fixture given to me free. Originally 120 VAC. Stripped the regulator out for pure DC operation, emergency lighting off a smaller car jar battery. I am going to power it off the batte...
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FWIW.... my LED's burned hotter when I was on shore power - but to get around it, I put a 1.98 voltage regulator (Radio Shack has them in the drawers in all the stores) and it takes input voltage from 9-16 volts and flattens it down to 12.0. To get to 11, you'll need a resistor that will drop it down to 11 volts. In order to complete the formula you'll need to know how much current the bulb is expected to pull. A good guestimate will do. If you make the resistor to large, they will be dim, to dim, they will burn out prematurely. There are lots of sites that you can plug in the numbers but you'll need the amp (or micro amp) draw to complete the equation.
Most of my leg's that I have (loose) are .002 amps which I've used in other formulas. Add the total number of LEDs you have and you have some number to guess from.
josh
Most of my leg's that I have (loose) are .002 amps which I've used in other formulas. Add the total number of LEDs you have and you have some number to guess from.
josh
