I know you have already done some pov stuff but i have an idea and i tested the basics of the concept already. so i have a ridiculous amount of 10 to 40ish gig ide hard drives anyway if you take the brush-less motor out of two hard drives connect them together i used a rubber band just what i had then power the one to spin the other. then hook a 3-phase bridge rectifier to the one without power then as you now you can get power so i did with my test you can get right about 5v obviously the faster it spins the more voltage. i dont have enough stuff laying around or i would attempt the rest. put a voltage regulator a battery for a "buffer" a wireless controller and a stick of rgb leds and now you have a pov that doesn't need battery's changed and you are not running it through brushes so there will never be data/ power loss i wanted to try this but you seem to have more time for this type of thing then me i would love to be able to do what you do and still support my wife and 4!!! kids but i have to go to work and it has nothing to do with all the stuff i really want to do like most of the things i see you build and experiment with i am good at this kind of stuff but there are only 24hrs in a day =( hope you like this idea thanx for reading even though i have horrible grammar
-Jeremy