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12V LED off 12V battery?

Z

Zoinks

Senior member
I have a 12V 500 mA LED light. Instead of running off and AC adapter can I just hook it up to a 12V battery? What do I have to do so I don't fry anything?
 
as long as it has a current limiting resistor, should be ok

judging by the spec you gave '12V 500mA' - it sounds like it already does
 
The high current might kill it. Probably need a resistor of some value.


Originally posted by: PottedMeat
judging by the spec you gave '12V 500mA' - it sounds like it already does
Click to expand...

I think that means it's rated for 500mA current maximum, so you need a resistor to limit current to 500mA
 
So how do I figure out what kind of resistor I need? Or, if I have to ask, should I "not try this at home"?

I can solder stuff together pretty well, I just need explicit instructions.
 
12V LED? There has to be a resistor built in, 12eV is a HUGE bandgap and would put you well into the UV spectrum. If it's not a UV LED, it likely has a built in resistor.
 
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