I have to make a project for school and it has to be in the shape of a circle on like a cardboard poaster board type thing. I want to put a piece of paper infront of it and somehow hook it up electically so that way if i press a button it will spin to a certian part of the cardboard. Anyone with any ideas on how to do this or know a website that will tell me how to do this?
To make a circuit that will spin a piece of paper when you push a button isn't that hard. All you need to do is get a cheap button or switch (you have to pick the right kind of switch though, otherwise it's a little more complicated -- I would draw you a diagram, but Y!A doesn't have the tools to do that) and a cheap motor. Take your electrical wires, hook one up to the positive terminal of a battery, take that end and hook it up to one side of the switch, then take another one, hook it up to the other side of the switch, take that end and hook it up to one of the terminals on the motor, then take another wire and connect the other motor terminal to the negative end of the battery. When you flip the switch, it makes the connection and starts spinning the motor. Flip the switch again, and it stops. However, making it spin to a certain part of the cardboard is significantly more complicated, something that you won't learn until college, and even then you'll only learn it if you're working on a degree in engineering or physics (and only maybe physics). It involves either a digital system or a sensor, and it will involve some sort of control system.
just wrap the pc of paper over a magnetic needle and place it at right angles to the circular coil. Play a bit with the positioning etal-- best and safest is to try with a dc source less than 9 V. IF under suitable supervision-- u can also try AC mains
