[JohnnyGrey]

This is the prototype of my DFM7 gauge. The display doesn't photograph very well in low light. Four buttons are soldered on the underside of the board: Left, Right, OK and Cancel. I've run a program on it already that does a good job displaying MPG on my specific vehicle, but now it's time to implement a complete menu system so that I don't need to reflash it to make adjustments. In addition to the typical trip and tank mpg/distance/fuel consumption numbers, I'm adding a historical average that doesn't reset when you fill up. This will be useful for calculating economy over long periods of time.