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• 11:07, 8 December 2024 Paul talk contribs created page Tennis Ball Cannon (Created page with "This is a fully automatic tennis ball cannon. This was a project I did some years ago for no real reason. I originally make my own PCB to control the cannon. My day job approached me a month ago and asked If I would present something to a local elementary school for the Great American Teach-in Day. I converted this machine to be controlled by a Allen-Bradley CompactLogix PLC for that demonstration. This is that program. It makes use of the new user defined instructions a...")