I need to read a varying resistance value, it may range form 20k to 200k. I am planning to use the 16C73 for it's A/D. I am playing arrouind with an A/D that I have hooked up to my parallel port to make testing easier, so it would take me only a few minutess to test any suggestions, even if it only MIGHT work. Any ideas on how to this would be greatly appreciated! Thanks in advance. Louis Marquette