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  1. jefey3707

    8 3.7-4.5V LEDs to 12V car battery HELP

    I have 8 LEDs that are 3.7typical V , 4.5V max input and 20mA and i want to run them from my car battery 12V, ~13.2V when car is running how shoul di go about making the circuit. where should i put the resistors and what ohms should the resistors be, i also want the LEDs to shine their...

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