Roll of Solder
Honeywell high performance SS495A (U2) Hall Effect Sensor
Micrel MIC502 (U3) Fan Management IC PWM controller
LMD18201 (U4) Motor H-Bridge w/ heat sync
Etched circuit card supplied by ART-TEC
LED light bulb
80 Ohm ferrous core solenoid coil (electromagnet)
1cm x 1.75 cm permanent magnets (ceramic)
1cm round neodymium magnets
12vdc power supply
6# ceramic potting dish
6# length of 1# aluminum angle stock.
After completing this experiment, I have determined that it is in fact possible to suspend an object in space using the principals of magnetic levitation.
Using the Hall Effect sensor to control the polarity and power of the electromagnet was much easier to levitate an object than the hemispherical permanent magnet design. When trying to balance an object on the permanent magnet structure, it had the tendency to topple over. The object being levitated by the electromagnet would remain vertical and completely suspended with much less effort than the permanent magnet structure.
Using a self adjusting, reversible polarity, pulsewidth modulated circuit to control an electromagnet.
Science Fair Project done By Aaron M. Cox