Come see how we're building a massive LED wall — 18×508 pixels, ~9,100 WS2812Bs, driven by a Teensy 4.1 + ESP32 combo for true parallel output. We'll share what broke along the way (fried power rails, signal crosstalk, weird library bugs) and demo our working 9×10 test rig live, complete with games and a mobile dashboard. Come poke at the hardware and ask questions