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Power Your Arduino From Your Car using AVR microcontroller

The Arduino -- and AVRs in general -- have a wide range of power supply options ranging from around 1.8V to 5.5V. The choice of voltage is usually determined by the desired clock speed or power consumption requirements. The Arduino and its many variants have power jacks that allow connections from big, clunky "wall warts." Alternatively, some boards can get their power from external power supply pins, eithe ...

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