How do you make a vending machine control board? Answered
I am working on making a vending machine, and I wanted to make a control board for it also. I will need a circuit that when a light activated resistor senses that a laser beam is broken by a coin falling past it, it will press multiple buttons on a calculator. (for example, if the laser beam sensing when a quarter falls is broken, it will need to press +.25=) I will also need a circuit that subtracts the amount of money a certain object costs when the button for that item is pressed. It will need to not let you press a button and display something like "you did not insert enough money" if the calculator does not have enough money added on to it. I was hoping to not need to use any ICs for it, but if I have to that is fine. I would not pay any more than I would need to buy a controller that would work for it like a raspberry pi, and if you have any suggestions for a controller or how to program it, tell me those too. Thanks!