Download the resistor.zip file from http://www.gdssw.com/tools/ for a console C++ program to help you design a voltage divider from the resistors you have on hand. The included document also has a simple resistor storage method my wife came up with that lets me find any resistor value I want in a few seconds. There is also an Open Office spreadsheet file that calculates resistance for round and rectangular wire; I find it handy for designing shunts.

Edit 26 Jul 2009: redesigned the program and added the spreadsheet. The resistor.cpp program now does both voltage divider calculations and can find two resistors that can be used to make up a desired resistance value.
Bookmark and Share
My Zimbio
> TopOfBlogs .sg   TopOfBlogs