Hello Mr. John Smith,

The net has a wealth of information about stepper motors. Just do a search using goggle (http://www.google.com) with the key words "stepper motors" and you will get back about 45,000 possibilities.

A good site I found that describes how to build a dual controller with a great description of theory and schematic's can be found at the following address

http://members.aol.com/drowesmi/dastep.html

Good luck,

Charles Bannister