I built an Arduino powered Ghostbuster proton pack in two weekends. It has functioning lights and sounds, weighs only 13lbs, and I have written a short guide on how to make your own. This was a great project, and it led into my creation of the additional related props: a servo controlled ghost trap, a PKE meter, a slime blower, a set of Ecto goggles, and I also transformed my car into a replica ECTO 1 in one week!
