How Do Vending Machines Tell the Difference Between Fake Coins and Real Coins?


I have wondered for quite some time how vending machines tell the difference between actual coins or fake money and slugs. It’s actually pretty straight forward, but cool to see anyway.

Definitely a cool insight into how these machines work (and also, for those wondering, the amazing Skittle vending machines you see in photo above are given to celebrities by the Skittles company). Normally not jealous of the famous, but this is one exception.

[Image via, H/T story via Sploid, nod to ScienceChannel]

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