The Discoverer is a remote controlled car with a Raspberry Pi as brain. This is actual the biggest robot I build. It is equipped with a metal detector, a pan&tilt kit for the camera and a compass module. I designed this robot as a beta test model to carry the metal dector and to test the GPS reciever combined with a compass module. I learned a lot by building this robot about the electronics as well about the chassis. The wheels are to small to drive on unpaved roads. The picture below shows the parking yard of the university next to me. As you see in the picture below the weels are very small compared to the stones.
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