Cool DIY Solar Tracker Self Powered No Electronics - How it Works

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This is a brilliant simple idea for a homemade solar tracking model using a few easily available components and minimal assembly at almost no cost. It makes sense by powering itself and without using electronics or sensors. Presented here as a sixth grade instruction and explanation set for a science project with clear animations and scientific explanations of the physical principles with diagrams behind the workings of the model that were readily understandable and motivating to young students.
The video ends with food for thought to encourage creativity and problem solving with more diagrams and animations of how to scale up the model into a low cost practical do-it-yourself device to produce alternative energy. This also inspired indirect student interest in producing this video as a technical presentation to explain the idea using MS PowerPoint, Movie Maker, and Google Sketchup to make 3D models and animations.
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