A builder named Jon constructed a functional home train departure board using a Raspberry Pi 4 (1GB model) driving three to four HUB75E LED matrices, each 128x64 pixels, via either an Adafruit RGB Matrix Bonnet or an Electrodragon 3-port RGB Matrix board.
The system pulls live schedule data from the Rail Data Marketplace API. Power comes from a dedicated 5V, 5A supply, a deliberate choice to prevent brownouts under sustained matrix load. The hardware stack is documented, the software is real, and the display is readable at a distance.
What makes the full write-up worth reading is the wiring detail between the Pi and the HUB75E interface boards, and how Jon handles the API data to render scrolling departure information cleanly across a multi-panel array. This is a replicable build, not a one-off flex.
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