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Have you ever wondered how vending machines instantly know whether your coin is real or fake? In this video, we explore the fascinating technology behind coin validation. From size and weight detection to electromagnetic sensors and optical scans, vending machines use a surprising amount of science and engineering to make sure you’re paying with real money. 🎯 Whether you're into engineering, curious about everyday tech, or just frustrated when your coins get rejected, this deep dive will explain exactly what's going on behind that coin slot. ⏱️ Timestamps 0:03 - Intro: The Mystery of Coin Detection 1:07 - Size and Diameter Checks 2:02 - How Weight Helps Identify Coins 2:46 - Electromagnetic Field Testing 3:51 - Using Optical Sensors to Scan Coins 4:41 - The Coin Rejection Process Explained 5:15 - Handling Different Denominations 5:58 - Why Coins Still Matter in a Digital World 6:39 - Updating for New Coins and Security 7:08 - Final Thoughts: The Science Behind Simple Purchases #VendingMachine #HowItWorks #CoinValidation #EngineeringExplained #TechBehindTheScenes #VendingTechnology #CoinMechanism #Electromagnetism #EverydayEngineering #CuriousTechnology #MachinesExplained #WhyCoinsGetRejected #MechanicalDesign #SmartMachines #STEM 👍 If you enjoyed this video, make sure to like, subscribe, and hit the bell icon for more deep dives into the hidden science and engineering in our everyday world!