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.

Raspberry Pi boards are powerful little machines, but they come with a few surprises you might not expect until you're already in the weeds. Whether you're eyeing one for retro gaming, home automation ...