Robert Sontheimer was immediately on board when the first home computers arrived in our living rooms some 40 years ago, with his ZX81 and C64. Back then, he converted a plotter into a scanner, among other quirky and original ideas, and today he uses Arduino Pro Minis to control entire CNC laser machines and has even invented a matching suction system: his "self-changing toilet paper filter." In his office, he has a magnet that's been levitating for years – controlled by a Pro Mini, of course. Just a regular freak.