If you have an antenna rotator that's compatible with the Yaesu GS-232A/B and Easycom protocols, this system published by the Radio Artisan can introduce a whole new world of antenna control options. It can either form part of a computer-controlled rotator system or become the basis of your own independent unit. The code is flexible and allows for a variety of positional sensors such as digital compasses, and you can modify it to add more devices to control if required. Finally it supports a variety of LCD modules for antenna position display and other data.
Instead of building your own LCD module onto a breadboard, save time and move forward with the Freetronics LCD & Keypad shield which contains a bright 16x2 character LCD and five buttons that can be read from only one analog input pin: