I have been contacted by an artist that build a grid of WS281* LEDS. He can flash rainbows to it so we know it’s working. He needs someone to program it to display bitmaps from an SD card on the teensy3.5 and possibly text streamed from a source.
I don’t have time to take on the project. All my previous code to do similar work on the VHS wall-o-leds is available on github. If you are interested in this work, it’s a paid consulting gig you can haggle out with the client. Please DM your email and I’ll make the introduction.