Quoted from Yyaaargh:Hullo!
I'm in the process of building a Firefly themed pin using the Open Pinball Project boards and Mission Pinball for logic. Most of my parts are coming from a Williams Big Guns (System 11b, I believe). I would like to use the existing power supply and power supply board as they work fine. This is all pretty new to me and though I have been able to use the manual to some degree to find the wires I need I'm having trouble finding the right place to pull the ground from for the flippers. Does anyone have a source of information that might better explain the power supply to a newcomer, or better yet a blog detailing a similar process.
Thanks!
You shouldn't need to pull the ground from everywhere. All coils share a ground, which just goes to the ground star like all the other grounds and then to the appropriate bridge rectifier.