power my arduino from the car battery?
Will it be too many amps?
Place a 1/2 amp fuse between the battery and the Arduino.
Will my arduino use the whole amp from the battery
My arduino will be controlling 3 TIP120 transistors.. 1 for each color. The amps o the LED bars ten selfs will be under 1Amp for sure..
Use a 1 amp fuse for these.