Controlling Floppy Drive Stepper Motor via Parallel Port. Warning The PC parallel port can be damaged quite easily if you make incorrect connections.
If the parallel port is integrated to the motherboard, repairing a damaged parallel port may be expensive, and in many cases, it is cheaper to replace the whole motherboard than to repair that port. (Howto) Walz a Hard Drive Spindle Motor. This is a continuation of my blog on the same subject.
Please continue your commenting here. I am the proud owner of a stack of scavenged hard drives. I hoped to find really fast, torqueless motors inside. But instead I found myself a project for my new found 555 knowledge. HDD motor driver. Brushless DC Motors - a knol by Arun Kumar Reddy Kothapally. In a conventional (brushed) DC motor, the brushes make mechanical contact with a set of electrical contacts on the rotor (called the commutator ), forming an electrical circuit between the DC electrical source and the armature coil-windings.
As the armature rotates on axis, the stationary brushes come into contact with different sections of the rotating commutator. The rotor assembly may be internal or external to the stator in a DC brushless motor. The combination of an inner permanent magnet rotor and outer windings offers the advantages of lower rotor inertia and more efficient heat dissipation than DC brush-type construction. The elimination of brushes reduces maintenance, increases life and reliability and reduces noise and EMI generation. Solarbotics.net.