How to make a rapid fire xbox 360 controller with modes?

I find videos on rapid fire with modes but it only shows you it and where to buy it, i want to learn how to make it. PLEASE HELP!





Example:


http://www.youtube.com/watch?v=M2UBJg2M9aQHow to make a rapid fire xbox 360 controller with modes?
http://www.se7ensins.com/forums/hardware鈥?/a>





This guy explains both a simple one mode rapid fire and the multi mode rapid fire.