• on Audio/Video/Photography
  • Published in issue 9/2008 on page 50
About the article

Light as Air

Using the ATM18 to control a magnet levitation device

Light as Air
Overcoming gravity is an age-old dream, which we can’t expect to see fulfilled anytime soon. However, we can come closer to making it reality on a small scale. Commercial levitation devices that cause a small piece of metal – often with some sort of covering – to hover in the air have been available for many years. A coil provides the lifting force, and a light barrier is used to regulate the levitation height. This causes the levitated metal object to maintain a defined distance from the core of the coil. Many of these devices are more expensive than need be.
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