A while back I made a (prototype) braille display with a similar concept but using linear sliders (per column) rather than a rotating wheel. Unfortunately I got side-tracked from the project and never figured out the best way to add actuators.

I was proud of the fact that my design could be laser cut from a single sheet and assembled with no glue or fasteners (well, minus whatever mechanism would be needed to actuate the sliders)

Image: https://retr0.id/media/38116918-4023-437b-9a48-d2ffb1d02dbf/...

Short demo video: https://twitter.com/David3141593/status/1639261097252233220 (in the video caption I noted high friction, it was totally fine after sanding)