If you have a cat and have considered an automatic portioning cat feeder then you should consider the Super Feeder. I decided to hack mine to let me see track how much food is being fed to the cat, and how long the cat takes to finish her food.
This project uses an arduino based hardware rig which monitors the change in the weight of the cat feeder. Every time it goes off, it sends a tweet with the initial weight and the final weight.
