Eric Conner is developing an Arduino-based control system for building your own pinball machine:

The Pinduino Project

This is a dream that I have been working towards since 2012 […] I have finally found the time to complete it and have been progressing with leaps and bounds. Currently the project is 80% complete

Eric has thus far implemented:

• 64 switch inputs
• 64 lamp outputs
• 16 solenoid outputs
• 5 general illumination outputs
• 2 flipper outputs
• I/O Expansion port to add additional 16 solenoid outputs & flipper outputs

You can find design files and source code on GitHub and even contribute to the project:

EricConnerApps/Pinduino

 

eaconner has several shared projects on OSH Park including:

Pinduino Driver Board