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Thanks for the welcomes everyone. I am having fun trying to put this project together... long way to go, i think. Feel kinda funny relating what I am trying to do to spying but I guess the parallels are unavoidable. Thanks for the links IsaacT, I will check them out immediately.

I guess one of the things to learn is the vocabulary. Wouldn't have come up with rangefinder on my own but it does make sense. I'm gonna say "yes". and the ability to store and analyze is a another yes. I don't know where this project ranks in difficulty but it sounds like it's gonna be...

Hi IWIRE. I imagined that I would bounce a laser off of a flat spot on the machine and intercept the beam with perhaps a ccd or a photodiode to analyze the behavior at the point contacted. I have been studying photodiodes, phototransistors, etc... not sure which one to try yet. Thanks for...

Greetings everyone. I am an electrical engineer with too many interests for my own good and have been entertaining several measurement projects for some time, figuring that a laser would be the key but other than my dimestore laser pointer, I have had no experience. My first goal is to...