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Voltage Drop Answered

i have a 12v led bulb, I need to connect the led bulb to 12V rechargeable battery  and connect bulb for  long distance from battery and i connect the bulb i won't  work, i think the voltage drop would be the  answer and how can i solve that????

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steveastrouk

5 years ago

If its already a "12V bulb" it shouldn't need any resistor. Does it work at the battery ? Did it work at all ?

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caitlinsdad

5 years ago

look up any online "LED calculator". You need to figure out the specs of your LED or use values from datasheets on similar LEDs. Larger values of a resistor will be ok, it just means the LED may be a bit dimmer.

LEDs have to be hooked up with the correct polarity, positive from battery to positive leg on the LED and ground or NEG of the battery to the other leg of the LED. Try switching wires if it doesn't work. If you already hooked it up to a battery without a resistor, you may have burnt it out already. Careful with lithium polymer batteries if they heat up. Good luck.