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"In the 90s some smartypants made an awesome machine: https://en.wikipedia.org/wiki/Connection_Machine So, I made a small one. Inside is an Adafruit QT Py that drives (via a IS31FL3731 board) four 9x16 charlieplexed LED matrices. The source code is here: https://codeberg.org/trevorflowers/tiny-connection-machine If you'd like your own then visit my Gumroad store: https://store.transmutable.com/"