The basic idea is simple. Using a special jig ... especially if the motor has 4 or 6 wires. For a 4 wire motor, you can measure resistance until you find a pair that read a relatively low resistance.

In this exciting project, you will see how to build a mini brushed motor using just simple wire, magnets, and Lego. A basic commutator will be used to control the rotations and will test its ...