More gadgets like this: here
So you have always wanted to build your own sun tracker? Robotgeek has shared a simple guide that shows you how to do what with Arduino. This Solar Tracking Turret resembles solar energy systems that track the sun’s position to maximize panel exposure to sunlight.
You are going to need light sensors, RoboTurret, and a few other parts to get started. The sketches are available on GitHub. More info is available here.
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