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can you u get 12 volts down to 3 volts by using a 5 volt regulator and a 1/4th wat resistor? Answered

i need my car to go from 12 volts to 3 volts for LEDs... please help me!

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Rainh2o

Best Answer 8 years ago

Why not just build a 3 volt regulator

Agreed with lemonie - use 5-10 leds in series to drop the voltage - WAY more efficient that way, instead of burning off 75% of the power in a resistor.

if its just for LEDs you could put a couple in series with a resistor, and reduce the power dissipation in the resistor.