I don't see anything wrong with using a 7812 (variable voltage regulator) and dropping to ~ 8V using some sort of resistance to the center pin. It can do about 750mA, which is more than enough for the arduino.
I don't see anything wrong with using a 7812 (variable voltage regulator) and dropping to ~ 8V using some sort of resistance to the center pin. It can do about 750mA, which is more than enough for the arduino.