Podcast Episode

How Do Vending Machines Detect Fake Coins?

Kurzgesagt Podcast: Science Revealed··2 October 2026·46 min

About this episode

Ever wondered how a vending machine knows whether a coin is real or counterfeit?In this episode, we take a fascinating look inside the technology behind coin validation. Discover how vending machines analyze coins using factors such as size, weight, material, magnetic properties, and other physical characteristics to determine whether a coin is genuine.From the moment a coin enters the machine to the instant it is accepted or rejected, we explore the clever engineering that makes this everyday technology work.A simple question with a surprisingly sophisticated answer. Hosted on Acast. See acast.com/privacy for more information.