Mystery Top
# 5K40.17
| Description | The top demo is really a specially designed brushless DC electric motor. The small top corresponds to the rotor and flywheel of a motor. It actually has a small bar magnet in it. In the base are a battery, coil, steel core, and transistor. These create the magnetic field that power the small top. As the small top moves around on the surface of the base the motor is turned on and off by the top leaving and entering the small magnetic field which is concentrated at the center of the base. The transistor is nothing more than a sensing switch. The battery should last for 5 to 7 days continuous running. The top runs at approx. 2500 rpm and full battery strength. |
| Location | 38E |