This DIY Split-Flap Display Does Both Time And Weather | Hackaday
Flip clock - Wikipedia
Building DIY Split-Flap Displays - Parts Not Included
GitHub - Dave19171/split-flap: code for split-flap display
I made a split-flap display module powered by an Arduino nano. They daisy chain together. These ones display numbers only, so it can be a clock, social media subscriber counter, crypto price