Discover the ultimate DIY Automatic Coin Sorting Machine made out of cardboard! In version 2.0, you'll need just a few materials: cardboard, a cutting knife, a battery, an electric motor, a small nut, ...
If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...
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