Split-flap displays work by printing letters or numbers ... and uses an Arduino as the control board. A 3D printer and CNC machine keep the tolerances tight enough for the display to work smoothly ...

Photoshop CC tutorial showing how to recreate the dramatic, split-flap display from the "Non-Stop" movie trailer. Zurich Cn BT Bold font: <a href="http://goo.gl ...

That seems to be what’s going on with this beautiful split-flap clock build by [Erich Styger ... The four displays are controlled by a single controller board, which houses an NXP K22FN512 ...