Bitclock is a fun and easy make with your 3D printer.

It's a hackable e-ink display for your desk with built-in CO2, temperature, humidity, and other air quality readings to keep you comfortable and productive!

Once you print the case, all you need is the circuit board + display assembly available for sale at https://bitclock.io/ There are no screws, everything snaps together using a compliant mechanism! Currently the electronic component is shipping to USA only.

Bitclock is open source https://github.com/goat-hill/bitclock

Featured on Reddit (500+ upvotes!)

Tested print settings:

Prusa Mini+ with PLA and PETG.
Default Prusa Slicer settings with 0.2mm Structural mode + input shaping.