Once again the ease of using Arduino-based hardware to create a wide range of projects is demonstrated by Norbert Požár - as he created a magnetic levitation system with an electromagnet, hall-effect sensor and an Arduino board. Here is a quick demonstration of his system in action:
Thankfully Norbet has also posted the required Arduino and Mathematica code for anyone to examine and make use of. Furthermore as the concept of electromagentism is somewhat complex, a description and tutorial for the more technical reader has been made available as well.
Kudos to Norbert for his efforts and another use of Arduino hardware. This project lends itself to the use of our Freetronics Eleven Arduino-compatible board, and perhaps experimenting with our sensor module: