even an synchronous motor is not a problem..tell me some site
The basic thing is to create that rotating field in the stator. For this the simplest is you need 4 poles placed like a cross, and 2 phases separated by 90 degrees. Wire the poles so the opposite poles help each other, and the two phases are at right angles. You can get the two phases using counters or shift registers etc with amplifiers, or analogue phase shifters, op-amps, using a sine wave source and followed by power amplifiers. Consider stereo audio amplifier. It is better to work with sine waves than square waves, as the field shifts gradually. The rotor could be a basket of copper shorting bars. I think you could do away with the iron in the rotor for a demo motor. The second link also shows a simplified layout for a three phase motor with three poles. The eddy current motor is a simpler one to make. See the link below for a few ideas.
