Hello world. Recently, I've started diving into the world of magnets. Here is a rough drawing of my experiment (not homework/coursework, simply doing it for personal interest) (I have found the items on ebay and what not, just creating the ideas before purchasing the magnets and other items): [PLAIN]http://img857.imageshack.us/img857/8793/1309381768093.jpg [Broken] I'm using the neodymium magnets to repel each other, and the extremely low friction (between board & smooth-surfaced-magnet), to spin the board. In the image (rough drawing): * 1st image: Side view, board (has a few neodymium magnets on the edge which I forgot to draw), it sits on 2 neodymium magnets repelling each other for "levitation", it is placed in a dome. * 2nd image, top view/angled: The dome also has neodymium magnets placed all along the walls, perfectly aligned with the neodymium magnets on the board, however all magnets are set at an angle & opposites (so they repel each other to give the board with also angled magnets the repelling push), with angled magnets my theory is it gives it more of a repulsing factor when the board-magnet leaves the dome-magnet's half ) * 3rd image: the angled magnets of board/dome wall would be repelling each other creating the spinning movement of the board. Everytime a board-magnet passes a dome magnet it would generate a push, and multiple magnets on the dome/board would be generating multiple pushes many times a second (however force would eventually drop due to, angled magnets give a strong push however they also have a strong repulsion when the board-magnets are coming into the dome-magnets (thus [equal] velocity required for the board-magnet to pass the initial half of the "repulsing" magnetic field until the dome-magnets center, however when board-magnet passes the dome-magnet center, the dome-magnets strong repulsing magnetic field will be positively generating a strong pushing velocity on the board-magnet)). To start the experiment, you would need to give the board an initial a spin to generate some momentum (here in lies the problem, and manual pushes would be needed to continually generate force since input > output). Now what I need help with was, can I generate/capture if possible electricity from the moving board (without interfering with the movement) or something, and then redirect it to e.g. a motor on the top of the board, which would then give it another push (instead of me manually pushing it), that would be more efficient than simply letting it spin then stop (due to the force decreasing, and the "bad" repulsion (by "bad" repulsion I mean, the part where the velocity needed to enter the magnets magnetic field is high) ), so a new manual "motor" push is given every so often, to make the slowing down force, go slower. The motor is simply for giving it a push, instead of me manually pushing it. I would be using some sort of output to generate more input. My question is, would this theory work in general, is the motor a good idea (or do you have something more useful to convert output into input), how long would the spinning last, what is the maximum RPM you think it could achieve?