@rolenthedeep I have a bunch of 12V batteries and a bunch of 12V power regulators, I was going to try and mess with that and see if I could get it working- I knew there were some differences between the designs, I think some versions even generated AC and required rectification? but I actually hadn't heard of them using electromagnets these days, I do wonder if it'll work, we'll see how it goes, thanks for the tip though!