This is a solar tracker that I'm working on. It's a stationary robot that will keep a pair of solar panels perpendicular with the sun so that they can charge batteries. I only have one panel on it, but in the end, there will be two. By the time I was able to test it, it was already dark so I walked around with a high powered halogen lamp in order to simulate the sun and have the robot track me. I still have a bit of testing to do, but for the most part, it works.