Before the Raspberry Pi came out, one cheap and easy way to get GPIO on a computer with a real operating system was to ...
XDA Developers on MSN
This awesome live map of the Washington Metro makes for a cool Raspberry Pi project
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.
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