I checked the arduino forum and got a reply:
"1. If the sensors are all in the engine bay, then I suggest you ground to the Arduino and its voltage regulator to the car ground in the engine bay near the sensors, and nowhere else.
2. Put some filtering on the all the Arduino inputs, such as a 47K resistor in series with each Arduino input pin, and a 0.1uF capacitor between each input pin and Arduino ground."
Its a bit over kill for my needs bud, but thanks
"1. If the sensors are all in the engine bay, then I suggest you ground to the Arduino and its voltage regulator to the car ground in the engine bay near the sensors, and nowhere else.
2. Put some filtering on the all the Arduino inputs, such as a 47K resistor in series with each Arduino input pin, and a 0.1uF capacitor between each input pin and Arduino ground."
(02-10-2014, 08:54 AM)vincent1 Wrote: ive used some thing like this on projects they seem to work ok you may need two though
http://www.ebay.co.uk/itm/New-300W-12A-D...2c8bb2b935
Its a bit over kill for my needs bud, but thanks
Wishes for more power...