Framed Washington Metro map uses Raspberry Pi Pico W and WMATA departure API to light 144 LEDs live. Laser-cut matboard masks 144 LEDs; data refreshes so you can see every train's position from home.

Maybe a true Gadget Master knows every component on a Raspberry Pi board? Maybe. I'm not talking about the HDMI connector or the P2 audio plug, but what about the linear regulator or the ultra low ...