Motor control

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http://feelpavan.wordpress.com/2010/02/14/stepper-motor-controlling/ A stepper motor can move in accurate angular increments knows as steps in response to the application of digital pulses to an electric drive circuit from a digital controller. The number and rate of the pulses control the position and speed of the motor shaft.

STEPPER MOTOR CONTROLLING « PAVAN's Blog

Variateur pour moteur brushless

http://www.silicium628.fr/variateur_pour_moteur_brushless/variateur_pour_moteur_brushless.html Le rotor est constitué d'une cloche à la périphérie de laquelle sont collés 12 aimants permanents très puissants. Le stator, qui est fixe, se compose de 9 bobines ne comprenant chacune que quelques spires de fil émaillé. Ces bobines sont reliées en trois ensembles de trois bobines en séries .

Web-controlled watering can and vortex tube

http://benkrasnow.blogspot.com/2010/09/web-controlled-watering-can-and-vortex.html UPDATE: Code added at the bottom of this post.

Russ Nelson

Most 5.25" floppy disk drives have a stepper motor in them for positioning the head, plus interesting widgets like optical emitters and detectors. With a little bit of work, they can be removed and put back into service with your Makezine controller . http://blog.russnelson.com/opensource/reusing-floppy-stepper-motors.html
http://lab.guilhermemartins.net/2009/01/29/l293d-custom-motor-driver/

Guilherme Martins : Control your motors with L293D

After long research and trial and error, I´ve came up to a new walkthrough regarding this nice chip, the L293D. Each project is one project and each one has its own unique power configurations, so you must be aware of the best battery choice and how to distribute voltage through your robot.