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EPTAORA: the 7 segment clock
This project was inspired by another similar project that I saw a few years back. I mostly rebuilt it completely and challenged myself to print it as small as possible on a standard 3d printer using a standard nozzle. The size was determined by the smallest screw hole that was possible. The clock consists of 4 modules which work in a pair to display the time. The mechanism is quite simple using a set of cams and followers. The stepper motor turns one module and the second one is driven by a carry over mechanism. The right side pair displays the minutes and the left side displays the hours... More here.
A lovely idea and an even better implementation. A really smart design, both aesthetically and mechanically.