How do vending machines and other money counters (especially older models) differentiate between what coins/bills are put in?
In: Economics
Coins are easy, all you need is a couple grooves in an angled surface. As the coin slides down, it falls through the larger grooves until it hits the correct size, at which point it can’t fall any further. Instead, it slides along the groove until it reaches the container for that kind of coin.
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