Gas gauge calibration unit

I was able to get to town and buy a couple parts at RadioShack. The part bins were not well stocked, but got things I can substitute in. I made a few minor changes to design.

I spent a few minutes working on a board layout, just to get an idea how to build the prototype. I have not routed, I will do that with wires on prototype. The connections you see are called nets, or ratsnest.

I think the switch buttons and LED1 may be cabled for remote mount, or removal after calibration.