Mechanical split keyboard with OLED displays in the key caps
It uses QMK as firmware for the keyboard and controls the displays via SPI and chained shift registers to address all displays separately or even all once.
Other keyboard sizes will follow later (maybe a 75% version and a macro pad?).
There was a hackaday post earlier about this project: https://hackaday.com/2022/10/17/poly-keyboard-has-screens-in-every-key/
The HW development is almost finished. If the newest revision ticks all boxes the PCB layout will be transferred to the other side of the split keyboard. After that the firmware needs further improvements as it is currently really just work in progress to show what is possible. There is a build log on https://ko-fi.com/polykb which I might duplicate here for better reach.
More details will follow, please feel free to dig around in the git repos, but also be warned that it is not yet well organized (sorry).
Very interesting project!
I hope you know about OLED display burnout problem. I'm afraid this might be a problem for this project. I did a burnout test a few years ago, you might be interested (there are English subtitles in the video): https://www.youtube.com/watch?v=GWOFF5tMv_A