Quote Originally Posted by TheMadMan View Post
This method should be able to work quite well but possibly will not be too accurate if the test piece DUT is too big or too small.
As far as I can remember, the ADC converts the voltage received (between 0v and 5v) to a number between 0 and 255. You will have to adjust the value of R1 to get a reading that is accurate for high value resistors and another R1 value for low value resistors and probably a number of times in between.
This method will probably work very well in cases where you are trying to get a number of resistors as close as possible to identical, closer than 1%.
Must add this to my library.
All the best,
That schema is relatively orthodox stuff that I was formally taught at TAFE.