Useful Stuff from Around the Inter-Webs

Pinball Related

Adding a knocker to a Stern SAM-based Game

http://www.home.earthlink.net/~pinball_stuff/knocker.htm
https://pinside.com/pinball/forum/topic/are-there-any-stern-real-knocker-kits-available

Common Failures, Troubleshooting & Repair of Williams WPC Games

http://techniek.flipperwinkel.nl/wpc/index3.htm

Arcade Related

John's Arcade Red Tent / Nintendo VS PPU & Rom Info

http://www.johnsarcade.com/nintendo_vs_ppu_info.php

Building an AC Wiring Block for an Arcade

http://therealbobroberts.net/acwiring.html 

Standard JAMMA Pinout

https://www.mikesarcade.com/cgi-bin/spies.cgi?action=url&type=pinout&page=Jamma.html

BK Precision Rejuvenator Heater Values

PDF Download

Other

ATX Power Supply Pinouts:

http://makezine.com/projects/computer-power-supply-to-bench-power-supply-adapter/