Make a game pad with an accelerometer inside!
This project tutorial will show you how you can convert a console game pad into a USB keyboard mouse for playing games on your PC. The USB game pad can be used with nearly any software, such as a MAME emulator, game, simulation software, or for custom user interfaces.
We'll start by turning the buttons of the game pad into keyboard buttons, so that pressing 'up' is converted into the 'U' key, for example. The firmware is easily adaptable, so you can adjust it for whatever software it will be used with.
Then we'll make the project more interesting by adding an accelerometer. This will allow the game pad to be used as a mouse by tilting it!
This tutorial including the original code and Portal video is by Devlin Thyne! Rock!