motor

http://www.gearseds.com/files/Lesson3_Mathematical%20Models%20of%20Motor... DC gear tutorial

http://lcamtuf.coredump.cx/rstory/ GEAR

Arduino Relay Control
http://itp.nyu.edu/physcomp/Tutorials/HighCurrentLoads
http://www.glacialwanderer.com/hobbyrobotics/?p=9

Robotoid
http://www.robotoid.com/

Port Manipulation
http://www.arduino.cc/en/Reference/PortManipulation

SHELL SCRIPT
http://www.pluggy.me.uk/arduino-ubuntu/
http://www.sundh.com/blog/2011/05/get-processing-and-arduino-to-talk/

http://www.instructables.com/id/Make-a-CNC-Hot-Wire-Foam-Cutter-from-par...

http://www.makerbot.com/blog/2011/05/25/high-torque-threaded-acme-rod-ne...

http://www.rcgroups.com/forums/showthread.php?t=23148

http://www.rcgroups.com/forums/showthread.php?t=469391&page=2

http://store.kysanelectronics.com/servlet/-strse-Stepper-Motors-cln-42-m...

http://lazarus2047.blogspot.com/2011_02_01_archive.html

http://reprap.org/wiki/StepperMotor

http://www.opencircuits.com/Motor_driver

Torque and Horsepower
http://www.osengines.com/faq/faq-q686.html

http://lancet.mit.edu/motors/motors3.html

Turn a printer into a laser cutter
http://www.adafruit.com/blog/2010/04/03/turn-a-broken-epson-printer-in-t...

http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1285093255

http://www.david-laserscanner.com/forum/viewtopic.php?f=2&start=45&t=857

http://schmalzhaus.com/EasyDriver/

http://www.edaboard.com/thread2567.html

http://www.mastincrosbie.com/mark/electronics/pic/stepper.html

http://hackaday.com/2010/03/31/cnc-plotter-from-old-parts-2/

http://vimeo.com/10479779

ULN2003A Darlington driver chip
http://www.hobbyengineering.com/H1143.html

Allegro H Bridge
http://www.allegromicro.com/en/Products/Part_Numbers/3982/index.asp