Here is a shield I built for my Uno. It has a resolution of 0.02 Ohms. I'm currently finishing the video for the code demo/explanation on how it works.
Next I plan to simplify it a bit more and add a basic function generator on a shield designed for the Due.
I would like to thank Tim and his Visual Micro project. Using his add-in to program and debug the Arduino software made it easy.
www.VisualMicro.com