Sports-Related Senior Design Project Ideas for EET Major Using C/C++ or PLCs

I am a EET major and need to come up with an idea for my senior project. I would like to do something sports-related (preferrably basketball or football) but it doesn't have to be. My knowledge of C/C++ programming and PLCs is about the same so I have no preference with how it's programmed. I just need some good ideas.

I recently spoke with a student who used this "(detector)":http://www.eeweb.com/blog/extreme_circuits/beam-break-detector-for-camera-shutter-or-flash-control for a 40 yard dash project. Just throwing an idea your way.

Trey,

How about putting an accelerometer and wireless link inside a football or basketball and providing realtime feedback on various stats such as velocity, acceleration, distance, etc. You could process the real-time data on a host computer using your C/C++ knowledge.

This is an idea that could be applied to a real product where sportscaster use the data to show interesting stats during a game, such as the speed a quarterback throws a ball (football), or how fast players pass the ball between each other (basketball).

Hope this helps spur some creative thinking!

Electronics sensors in the form of paint on a tennis court to tell when the ball is out of play or hits the top of the net
Or a robot that automatically paints the lines on the tennis court Or electronic pressure sensors under the tenis court itself to capture players foot moves