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How Do Vending Machines Detect Fake Coins? [Solved]
“Vending machines use light sensors to measure the size of a coin and electromagnets to detect the metal type to determine what kind of coin it is,” Chan writes. “If you’re not shaped like a quarter and built like a quarter, you ain’t a quarter in their book.“29 Mar 2016
How Do Vending Machines Detect Fake Coins?
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