I am by no means a professional EE, so if you see anything here that is not up to standards (and you see what I'm doing wrong) please feel free to tell me.
I don't sell these things and I don't intend to.
If you want to try and reproduce my setup, I can help you with that.
- The easiest MOSFETS to use are going to be the Fairchild FQP30N06L https://www.sparkfun.com/products/10213. This is a good tutorial on how to implement these switches
While learning about PWM manipulation, I also discovered a really cool related project http://www.arduinodev.com/hardware/obd-kit/.
Basically, this device allows you to connect an Arduino in and immediately (after some minor coding) read the values via standard OBD-II protocol based interfaces. Some example values are: RPM, throttle position and calculated engine load. There are