Real flowers do it, and even the Beatles did it. [Robo Hub] now has a plastic sunflower that tracks the sun using, of course, an Arduino. It may not qualify as a real robot, but it does mimic a ...

The other panel is wired up the opposite way, so if it is in the sun, it brings the other panel into alignment as well. This serves as a very simple planar solar tracker. If you want to track the ...