Stepper motors are nearly everywhere. this is marvellous for happy hobbyists. Even better, you can find them (and extract them from) a large number of devices that are easy to hack like old floppy disk drives, hard discs. For those of you who would ike to know more and keep an eye on the technology, I suggest that followiung reading:
- Control of Stepping Motors – A Tutorial by Douglas W. Jones
- How to use disk drive stepper-motors by Tomi Engdahl
- Stepper Motor Control by tigoe
- Arduino Stepper Library (software)
Source: Jason Striegel.