you can see the difference between the diffusion levels
I went from a breadboard prototype to Jason Coon's ESP32 level shifter board, much more tidy
2 batteries, fuse, meters and output
adapter box that takes 16V down to 5V and measures current used while distributing power
both boxes together are bigger than my previous setup, but looks a bit better
Originally I used the APA connector to send power to the panel
2x 32x64 chained P4 panels with a sad cable extension I had to make, vs pre-made 64x64 P3 panel
it's reasonably compact, 15 IO's for SmartMatrix (14 are really required), IR connected to port 34, and IO 16 connected to a NeoPixel strip