Well as with alot of guys i want a vending machine but they cost WAY to much
Well being the inventor i am (yeah as a kid i use to invent alot of crap which worked but stopped later on in life)
I thought about how to make a BYO Vending Machine
and i finally made plans for a simple mechanism to dispense cans with a push of a button
Now This is really simple and im gonna use this in a non cooled unit (old cabinet or something tall and slim)
Now the rails are simple enough there just to hold the cans in and gravity will make them move down
This system won't creat any jams or anything
But the dispensing mechanism is were i need help
I was thinking of a stepper motor but im sure someone can help me think of a simple gear setup

Anyway here is a bad paint pic i did


Does this make sense to you guys?
Anyway i have a way for the paddle to move by themselfs when u push a button and using gears to slow the process down.
But i don't know how to use gears to slow the rotation down.
But what do you think?
I made a quick mockup to make sure the paddle would actually stop the second can when the first goes through and it does

So if someone has an idea on the gears then it would be a fully self powered vending machine that only uses the weight of the can to make it move.
You can of course add a device to cool the cans like using one of them small plastic bar fridges that cools the can down or something like that.
What do u guys think?