Make: an Arduino-based soda vending machine that fits in your school locker

https://www.youtube.com/watch?v=zYQnnhVZMvE

Mistablik is an American high-school student who put his mind to finding alternate uses for the lockers that lined his school's hallways -- lockers that sit empty as students switch over to electronic textbooks -- and decided to build a tiny, secure, Arduino-based vending machine that would sell soda to his fellow students. (more")