ProSports-LED-Scoreboard/rpi-rgb-led-matrix-master/adapter/passive-rpi1

Adapter PCB to connect to Rasbperry Pi1

• Passive board. Simple, but might need to define --led-slowdown-gpio if you see glitches.
• Supports one panel connected to a 26 pin Raspberry Pi 1. If you have a newer RPi, check out the Passive 3 or Active 3 adapter.
• Open source KiCAD PCB EDA format.
• (not very pretty layout, was just lazy and let the auto-router do it).
• The FAB files are provided as passive-rpi-hub75-adapter-fab.zip

This board is shared on OSH Park (not affiliated)