How does a slot piece of equipment know d difference between a US Qtr and a Canadian one when they r like peas in a pod size?
Answers: It used to be that traffic lights were simply timed. Just close to clockwork. (Pay attention; there is a purpose here.) Then those decided that nearby was no point to sit stupidly late at darkness at a red light when nobody else be around, waiting for it to turn green. So they rigged up cameras to detect traffic and change the lights appropriately. Expensive, too easily artificial by non-traffic interference, and subject to weather exposure. Not to mention worthless if they got knock out of alignment.
So then they switched to induction coils buried within the pavement. It now detects metal of a sufficient mass to represent a vehicle, and THAT cause the elecric circuits to change the lights.
Same point for coin slots, especially on slot machines. Besides mechanical methods to determine physical coin sizes, they also hire induction coils to determine that mass of the coin. Each country's coin is a little different, and the inductor sends the information to be compared near known values. If it's a U.S. quarter, the comparison get the green light. Otherwise, it's the red flimsy. And, if it's a slug, the red light also notify Security.
The answers post by the user, for information only, CeQnA.com does not guarantee the right.
Related Questions :