Question

How does a vending machine know which coin you put in it? List the five tests vending machines use.

Answer 1

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"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." The process is a fascinating one.Mar 29, 2016

Answer 2

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"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." The process is a fascinating one.