I want to know if there is any advice I can get because I am going to make a project with a bill acceptor. A money changer from bills to coins. When the bill acceptor accepts a money with a value higher than the value that is left inside the machine the bill acceptor would expel the money back. Is there a way to do it? Thank you for the help.
Do you not have machines that change notes into coins in your country? They are common in my country, so the answer is yes, it must be possible to make one.
Can you get advice? Yes.
That is all the advice that can be given, until you give more detail about your project and components you wish to use.
There is one but right now it is still shipping but i want to be ready when the time that it arrive so im looking for things i could learn to for now and when it arrive i would apply them
The best way to prepare for an Arduino project is to buy one and work through the examples that come with it, or on line.
Read through the manual for the bill acceptor that you are going to use and see if there is a method of restricting the bill denominations it will accept, should not be an uncommon feature for a bill acceptor. As long as you can accurately keep track of the amount of change in the machine, it shouldn't be too difficult.
There maybe regulations covering the use of such machines - need to check that .
Stopping someone from stealing the cash will be the biggest issue .
Do also make sure it works pretty darn well - the most destructive force the machine will encounter after that of a thief is that of a short changed customer.