The design of this vending machine has basic requirements that consist of returning change according to the selection made and not dispensing the item if it is selected but not enough money has been entered. It would be pointless to have a vending machine that dispensed items before the correct amount of money had been deposited. If this was the case, why design the vending machine at all and just leave the items on a table for everyone to have for free, haha. Long hours put into this project but it was awesome to see the results!
The project in its entirety can be found in the Git repository below.
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https://git.robsengineeringadventures.com/rmhunter/vending-machine-circuit