Abstract: A demonstration device of solar magnetic suspension is introduced by using the electro-magnetic theory,mechanical and electronic technologies.This instrument is powered by solar energy,designed with integrated linear Hall sensor to probe the suspended object＇s displacement,and quantitatively displays automatic adjustment of the electromagnet＇s magnetism through digital tube voltage display circuit,which can accurately and visually demonstrate the physical phenomenon of magnetic suspension.The structure of this instrument is simple,stable performance,ease to operate,can be widely used in classroom demonstration,curriculum design and other situations,and thus we can obtain a good teaching result in practical applications.

Key words: solar energy, linear Hall sensor, magnetic suspension, voltage display