Mouthful of a title is it not?

This is an ongoing project of mine, which I intend to 3D print in the near future. It’s a segmented digital display, but driven mechanically. Each square segment has one tooth placed in a unique position, which allows the coded teeth of the circular gears to push it outward.

By pushing them out in the correct combinations (the part I’ve designed here), time numbers are constructed as physical blocks protruding from the surface of the display cylinder.