Magnetic levitation is so fascinating that it appears in electronics hobbyist journals from time to time. Indeed, Popular Electronics has printed this project twice, first in May 1966 and again in May 1989. This latest version uses modern op-amps and transistors, and so is much easier to get parts.
The scanned pages are reproduced here; please contact the publisher for reprints or questions.
Last update May 6, 2007 by Barry Hansen ©1998-2007