Kevin Dady is known for his strange hacks over the years, but this one is actually useful to Apple //c Owners. Not wanting to purchase an Apple //c joystick, Kevin set out to build himself one, using a thumb controller from an XBox controller. The result of that and a few parts from Radio Shack is a game controller that looks every bit the modern piece of equipment except for the old 9 pint //c connector.
Kevin has posted a step by step outline of how to build the controller complete with all of the pictures of his process on the Hack-A-Day Website.
Source: Hack A Day