If you’ve ever wondered how musical circuit boards like the Makey Makey Invention Kit or the Ototo experimental PCB-based synthesizer work, this video from BBC Earth Lab breaks down the science.

Sound artist and designer Yuri Suzuki shows us how to turn fruit into musical instruments with his Ototo piano circuit. The video also demonstrates how copper’s atomic number and structure is important for forming an electric current, and how a negatively charged current can be carried easily through bananas, oranges, vegetables, pencil graphite, plants, coins, spatulas, pots and pans, and more.

Suzuki is formerly of Maywa Denki, famous for their Otomatone Instrument Synthesizer. We’re also fans of the Stylophone Retro Pocket Synth.

Next, Brooklyn songwriter and producer J.Viewz creates music with fruit and vegetables. Then learn how to make a Pumpkin Piano with a Makey Makey.

Then watch more videos about circuits and copper, including conductive copper dominoes topple to turn on this lamp, the AgIC marker that draws circuits and How to Make the World’s Simplest Electric Toy Train.

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