The latest of is a mechanical seven-segment from a master of 3D printed mechanisms, [gzumwalt], and can use a single motor to cycle through all ten possible numbers.

Of course, there’s nothing unusual about using 7-segment displays, especially in a clock. However, [Edison Science Corner] didn’t buy displays. Instead, he fabricated them from a PCB us… ...

How to Make Mechanical 7 Segment Display from Cardboard In today's video I want to show you 7 segment display with unique mechanism that is our own invention. There are 7 circles inside. Each ...