Learn how to make your own smartphone projector at home using simple materials like a cardboard box, hot glue, and an incandescent light bulb. This step-by-step craft tutorial shows you how to ...
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DIY Hand-Powered Water Pump Generator | Build a Mini Pump & Light LEDs with Recycled Materials!
Discover how to build a hand-powered water pump that also generates electricity to light up LEDs using everyday recycled ...
Make a truth teller for light. Turn an old CD into a spectroscope to analyze light—you may be surprised by what you see. Try pointing your CD spectroscope at the fluorescent light in your room, sunlit ...
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