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Reed Switch Motor and Parallel Port Tachometer
Written by admin   
Monday, 06 June 2011 00:00

Authors: admin

parallel port

ashishrd.blogspot.com writes:

A reed switch motor consists of a rotor made up of 2 (or 4) permanent magnets. An electromagnet and reed switch are placed close to the rotor on opposite sides. I got my electromagnet by stripping a relay. When a magnet on the rotor gets close to the reed switch, the reed switch gets magnetized and allows current to pass through and turn on the electromagnet. The electromagnet pushes the magnet closest to it, and makes the rotor turn. The electromagnet is switched off when there is no magnet close to the reed switch, and this allows the rotor to spin freely from inertia. When the other magnet gets in working range of the reed switch, the electromagnet pushes again.

Reed Switch Motor and Parallel Port Tachometer –[Link]



Last Updated on Monday, 06 June 2011 14:47