 What's this? This is LED sand. Oh a fun demo. This is our kind of all-in-one demo for the Matrix Portal and this is my latest Matrix Portal board. So this is the Matrix Portal S3 demo. So originally we had the Matrix Portal M4 which had a SAMD 51 and an ESP32 co-processor and then I actually designed an unreleased version of the Matrix Portal with an S2 but then the S3 came out and the S3 actually has a really cool built-in peripheral that makes driving RGB LED matrices really, really fast. This is my prototype, not quite silkscreen ready, but it's got all the same hardware and same pinout, stomach, QT and reset button, a couple GPIOs, Neopixels and of course the accelerometer which makes it perfect for doing LED sand demos. It can drive thanks to the 2 megabyte of PS RAM kind of a massive number of panels. I think you'd probably drive 24 or 26 of these in a row as long as you can power them up. Bam.