Fake coins are detected using a combination of electromagnets and light sensors. In 1893, one of the first companies to install vending machines was the chocolate company Stollwerck.
Vending machines became popular in the United States during the late nineteenth century. Hero of Alexandria invented the first type of vending machine in the first century AD. Their books are not complete if you are not built like a quarter and shaped like a quarter.įake money can be detected using special sensors in vending machines. The size of a coin and its metal type are measured by light sensors used in vending machines, according to Chan.
