Mostly unrelated, but I (mostly Copilot) spent some time re-authoring a software stack of HUB75 displays in our office with rotating pixel art. A previous team set them up on a overly-complex stack that relied on a bunch of services that haven't existed for years, getting them stuck in place for the last few years.

While I found the hardware pretty simple, HUB75 displays seem _very_ picky about over-volting. The setup is basically a simple controller (such as ESP32-Trinity) plugged directly into one HUB75 (potentially chained to a few more).

When running off of USB power it pulls the voltage down to ~4.7v and the image looks great. When running off our junky Amazon 5v barrel connectors the image gets all sorts of artifacting. Quite frustrating!

Anyhow, I can't recommend HUB75 displays enough. Toss some retro pixel art on there and it is such a nice little picture frame sized treat!