Defying gravity is always a rewarding challenge, from the Wright Brothers' first flight through to Sputnik and beyond. And with an Arduino you can create a more down-to-Earth example of this by creating a magnetic levitation device as described by Arduino forum member "ea123". They have build a simple demonstration using a permanent magnetic which is suspended below an electric coil. A hall sensor is used to detect the distance from the magnet, and using this data the Arduino can control the current through the coil to keep the magnet at a set distance. Check out the following video to see it in action:
That's a pretty cool weekend project, and not too much hardware to worry about. For the details including sketch and schematic, login to the Arduino forum. And for more, we're on twitter and Google+, so follow us for news and product updates as well.