I would include a 5 volts voltage regulator with a smoothing electrolitic capacitors in order to protect the Arduino's power supplies line.
I took the freedom of correcting your diagram to reflect the additions.
__________________
. .. .. . .......
Prius Absolutum Dominium . ..........KOPPER
PHEV conversion since Dec 2006.. . .... .Future EV
. . . . . . . .CALCars # 27. . . . . . . . . . ..on the works now !!
. . . . . . . . . . . . . . . . .. . ........
|