Craig, one more thing that just came to mind. A while back when living in the Seattle area we were forced to get our cars smog checked every couple of years at a state-run test facility. They have you drive into a bay & up on their dyno. Then the sniffer probes are placed into your tailpipe...
Funny, I just ran across a similar circuit a couple of days ago that caught my attention. The circuit is entitled "Speed-limit Alert" but it's based on detecting spark pulses in a 'wireless' fashion. It's rather informative yet brief discussion and I have no idea if the circuit has...
I was in the same boat at one time. If you haven't already done so go check out www.piclist.com. Start with the "PICList.com PIC Beginners Checklist" then on to the FAQ. The Microchip website has many useful programming examples and I'd be surprised if they did not have exactly what...