It gets sensor values, then programmed if statements determine what the coin is and where it should go. It's kind of genius because you would think you could just activate the coins with a magnet but nope, those LEDs have to activate as well. I wonder how it's programmed for different coins in different countries though, guess it doesn't matter now since everyone just uses Apple Pay or a credit/debit card.
A coin changer, eh? I once worked in a facility that manufactured different coin operated machines. There were Electronic Coin Mechs. and just plain Coin Mechs. which were not electronic. Never once were they called a coin changer. Alot of machines were fitted with Mars coin mechs. which were manufactured by M&M Mars corp.
That's what I was thinking too but you aren't taking into account specific factors. The electromagnet is very important because if you simply sort by size without taking into account the mass (and consequently the material) the coin is made of anything that matches the diameter of a dollar coin or any other coin could pass as valid payment. You are assuming that the person making the purchase will always use real currency.
