You hear a lot about app, kernel and ROM development in the Android Development community, and XDA is no exception. However, that's not all you can do. We've discussed it before, but you can do hardware modifications and development with Android and Google's Accessory Development Kit (ADK).

In this episode XDA Elite Recognized Developer AdamOutler shows off how to make a "keyboard" for your Android device. Using and Arduino-like board, a USB cable and some code he creates a button that when pressed will type whatever message you have programmed for the button. So if you wanted to know more about hardware hacking, Arduino development or just want to see what cool project AdamOutler is working on, check out this video.