merun akong plano na ganyan - i think i have all the needed materials na lying around my box of "goodies" (junks actually) - pero i haven't started it yet.

i bought an analogue volt meter na pang 20volts max ang read-out and i plan to mount it sa cigarette lighter outlet...so i just have to "attach" the voltmeter dun sa cigaretter lighter plug (donor was a sirang celphone charger). So if i want to monitor the voltage of the car, I'll simply plug the thing dun sa cigarette lighter outlet.

pretty basic wiring positive to positive pole of the voltmeter and the negative sa ground ng car.