How Does A Vending Machine Detect The Denominaton Of Coins?
Many moons ago, I won £5 on a one-armed bandit in Plymouth. It paid out £1 in UK currency, and the rest in Canadian one-cent coins. The crew of the Canadian ship that was in harbour got wise that their one-cent coins were the same size as our sixpence.
Things have moved on.
Coins are firstly weighed. Then measured. Then there are other checks which are a trade secret.
This is why, if you try to use a slightly worn or bent coin in a slot machine, it is rejected. It’s a bugger when you need cigarettes from the pub machine !