Learn how to make a simple lemon battery and use it as an emergency phone charger in this hands-on science experiment. Watch ...
A blast from the Elektor archives: this 1998 battery tester uses a simple LED display to reveal a battery’s true condition ...
Discover three easy and educational DIY projects you can create at home using everyday household items. Learn how to make a miniature water pump with a plastic bottle cap, a simple homopolar motor ...
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