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How to Make a metal detector from a calculator and radio - YouTube
How to turn your AM radio into a metal detector | The SWLing Post
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How to Make a Basic Metal Detector – SurvivalKit.com
How to make a metal detector | WIRED UK
Kids Activity: Make Your Own Metal Detector at Home
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metal detector from a calculator AND A RADIO - YouTube | Máy dò kim loại, Kim loại, Hướng dẫn
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Metal detector of calculator and radio
Dave Dellecese on Twitter: "Just learned how to make a metal detector from a portable radio & calculator from Curious George. Thanks, @PBSKIDS! https://t.co/QVtMgitxsQ" / Twitter
Turn a Calculator Into a Metal Detector : 6 Steps - Instructables