Putting together the tiny about of hardware for this project I've been thinking about what I really want to do with it. Really, measuring resistors using a micro isn't that exciting as a project. Measuring physical constants using common components is a lot more interesting. Actually, the conductance quantum is related to one of the most accurately measured constants of physics, the fine structure constant (https://en.wikipedia.org/wiki/Fine-structure_constant). The relation is:

The magnetic permeability is a defined constant (so, you know, pretty high accuracy) so I suppose you could even try to get a good measure for the speed of light.

All in all, I think it'd be a lot more fun to make a circuit I can sit downstairs that doesn't do anything but try to determine the conductance quantum.