
By using an Arduino, GPS, and an accelerometer, this group put together the “Urban Defender” – A hyper-local geolocation based game which allows users to “claim” various districts of a city by throwing the ball against a wall to claim the territory. The ball tells you whether you’re in friendly or enemy territory through it’s built in speakers and LEDs. The concept video below does a great job of demonstrating the project.

The map above is how the users can track which geo-locations are owned by different groups. It’s just a concept for now, but it would make for a great iPhone app to use to monitor which territories are owned by each team.
The Concept:
The superb concept video above demonstrates the goal of the game, mapping out your “territory” by claiming and taking over blocks of a city. Awesome stuff!
The Execution:

The Plan: The entire project is incredibly well documented, full of flow charts, diagrams, concept photos and videos so you can learn how to recreate the build.
![control_big[1] control_big[1]](http://hacknmod.com/wp-content/uploads/2009/11/new-code.jpg)
The Code: Full details including flow charts, initial sketches, and source code can be obtained under their coding section.
![DSC00595[1] DSC00595[1]](http://hacknmod.com/wp-content/uploads/2009/11/DSC005951.jpg)
The Build: Pictured above is their first prototype with all the electronics stuffed inside the ball, comfortably protected by foam. You can view a walk through of the entire project build if you’d like to learn more.
Final Results:
The final result reminds us a lot of Foursquare, a popular location based game. Full project details can be found at the links above at the project build site. Be sure to subscribe to HacknMod for free to stay in the loop on future projects.









