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I honestly haven't stopped tinkering with it long enough to take pics. As soon as I got the concept working with the Arduino I wanted to see if I could simplify it. Scrounging through a parts bin yielded a 555 timer, some capacitors, and some LED's. Utilizing the 555 as a bistable circuit allowed me to light a green LED under a specified load/current, and a yellow LED over the same threshold. I liked how simple and small the setup was and there was very little noise due to a later added capacitor.
Today as I was driving the 70 miles up to Ball State University to see my lady friend on her birthday I was tickled that the gauge was so simple and effective, but as soon as I picked out a semi to draft up I69 with, I got to thinking about how I could accurately gauge the effectiveness of the draft. When I get home Sunday, I'm going back to the arduino and a nice LED screen to show MAP % as well as TPS % so I can gauge how effective at saving fuel my current driving is. Once again when I get around to buying another duino, and putting an MPGuino setup together, I would like to implement this setup as a screen.
I will make a thread with my findings and some MAP and TPS scales when everything is concrete. It's just hard for me to believe noone else has went down this path as well. FE is greatly dependent on engine load. Some say aerodynamics is key, but a smoother airflow doesn't get you more MPG, it's taking LOAD off of your vehicle that does. A lot of cars come with the sensors already in place to show you how you are driving, I'm just trying to use them to my advantage!
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