View source for 3D Printer

http://www.reactivesubstance.com/step.html

http://www.shapeoko.com/wiki/index.php/Parts

http://www.panucatt.com/product_p/ag1cnc.htm

https://github.com/modmaker/BeBoPr/wiki/Stepper-Drivers

https://github.com/modmaker/BeBoPr/wiki/BeBoPr-does-Black

http://bb-lcnc.blogspot.com/2013/08/bebopr-boards-available-online.html

http://www.pololu.com/catalog/category/120