How do credit card machines work?

Question

In order to have a credit card reader in a machine like in a ticket machine, do you have to have a machine specifically from Visa, etc, and pay them for every transaction? Or do you just buy some kind of card reader? I need to know for a possible new product. Thank you!

Answer 1

The source is an e-How article that tells you how to do this.

Expect to be charged a certain percentage of each transaction.

Good luck!