Analog MPG meter.

[dcb]

Ok, married the meter to a MPGuino for a road test, piece of balsa/hot glue, my fave





OBSERVATIONS:
1. The refresh rate of 1/2 second makes the meter seem very un-analog. While having a refresh rate works well with an LCD (gives you a chance to read it), the analog gauge should probably be updated with every injector pulse and the average 1/2 second of speed.

2. It needs a backlight.

3. It was a bit bouncy with the road, one of those aftermarket tachs might make a better in-car meter for this sort of thing (might even have a backlight).

So room for improvement certainly, and an instant mpg without a trip mpg is of dubious value unless you are a complete hiway star. But it is certainly a doable thing with very little hardware.

[wyatt]

That's really cool! Would this be the type of thing you could make it a "multimeter", and have a bunch of different things able to be displayed by simply moving a switch/dial? Ex, Instant MPG, Current MPG, and RPM and Gallons Per Hour on a Four way switch. You may have to make a quite complex display depending on how many things you could switch between and what those things would be, but it would be cool!