Solar PV tracker

Solar PV tracker: "For a class project (PV Design, Appalachian State, Dr. Dennis Scanlin) I decided to try making a low cost PV tracker. Being able to follow the suns path through the sky can raise your system output considerably (30-50%), but the argon filled ones can be a bit pricey, and seem to be a bit unsteady in wind. I looked at several different designs, looked at what materials I could find, and this is how I did it."