I created a robot that uses the same principles as the GPS system is based on to localize itself. Instead of GPS satellites I use blinking LEDs (dLights from Dexter Industries) as beacons. The beacons are detected and identified using a standard NXT light sensor.
Aswin walks us through his project on his blog, and even has a cool video showing the robot in action.
The second project this week was developed by programmablebrick.blogspot.com/ . This project uses the dLight and a long exposure camera to make some beautiful art.
I built a robot that moves a LED around a grid and then turns on the LED to the desired color at each location on the grid. I used my DLSR to take a very long exposure while the robot is moving the LED around the grid. The end result is a photo of the LED at all of the various points in the grid which (hopefully) looks like the image the robot is trying to reproduce.
Judging by the pictures and the video, the experiment worked. These are some really beautiful pieces of art produced, a Van Goh and a Mona Lisa.
Here’s the video detailing the work done and how the rig was setup.