[Shawn] sent in his fully adjustable auto-fire mod for an XBox360 controller. Itís pretty simple Ė just an ATtiny85 soldered to a button with a pot to adjust the rate and switch to turn it on and off. It could have been done with a 555, but this is good enough.

http://hackaday.com/2012/01/16/hacka...nuary-16-2012/