Raspberry Pi based Pinball Dreams table : r/retrogaming
Hi Fi Audio Stereo Amplifier Arcade Game Audio Kit 4 inch Speaker for Raspberry Pi Multi Game PCB Pinball Machine|Coin Operated Games| - AliExpress
electronics - I2C fails when pinball machine connected via MCP23017 draws high power - Raspberry Pi Stack Exchange
Raspberry Pi helps old school pinball machine spew internet cliches #piday # raspberrypi @Raspberry_Pi « Adafruit Industries – Makers, hackers, artists, designers and engineers!
DIY Raspberry Pi Powered Pinball Machine [Kitchen Build]
DIY Pinball — HackSpace magazine
Raspberry Pi and Arduino Power Custom Pinball Table | Tom's Hardware