How do vending machines distinguish counterfeit money?
Vending machine is a very modern sounding device, but in fact, the idea dates back to … 1st century AD.
The earliest vending machines appeared in England from 1615 and until 1867, the fully-fledged vending machine was officially invented by Simeon Denham (British).
Not a new invention, but have you ever wondered how these vending machines work? Here is the answer.
1. After inserting a coin into the machine, this metal block will pass through a light sensor used to measure the […]
