The regulator on the Arduino should manage most of the noise. I'd be tempted to put in a big, old, crude, iron core choke too, just to be on the safe side. Modern cars are pretty quiet compared to the old point/coil ignitions of yesteryear.
The regulator on the Arduino should manage most of the noise. I'd be tempted to put in a big, old, crude, iron core choke too, just to be on the safe side. Modern cars are pretty quiet compared to the old point/coil ignitions of yesteryear.