What voltage / amperage / frequencies can I expect from the tach line of a 2001 eclipse v6?
The question is all in the title, but any way. What numbers can I expect to see from the tachometer signal line of my 2001 mitsubishi eclipse v6? I've read that some times it can be like 3 cycles for every 1 RPM. I would assume it was running at 12 volts, but is this false? What kind of amperage could I expect to be pulled on that line as well? I plan on connecting an arduino to this to get the frequency as an input (new new new newbie to arduinos!). Can I expect to need to step down the voltage, if so, how? Is there some basic principle or standard for the tach line that I am unaware of? Any help with the tach line info or how I should connect it to the atmega chip would be AWESOMELY helpful!!!