This is my second version of my automatic fish feeder. I wanted a more compact version that would be better suited for fish flakes and could hook onto the side of the tank. The mechanism is similar to a coffee grounds dispensor. It basically is a round container with a rotating disk on the bottom. The disk has a hole in it which food falls into. The bottom of the container alao has a hole in it such than when the disk spins the food will dispense out. Inside the container is a plate above the containers hole to prevent all of the food from dispensing at once and an agitator to prevent food from piling ontop of this plate. The motor is a 3rpm microwave tray motor that is attached to a minute accuracy digital timer switch.