In MAKE 03 we have a VCR cat feeder project, but Peter from NYC sent in another way sans VCR…“When I had to feed ol’ Skippy upon leaving my apartment for a few days or so, I’d hot-glue a standing box of kittyvittles in the center of a piece of 2′-square cardboard, and cut a paw-sized hole in the bottom. After making sure the bathtub faucet was dripping slightly into a dish, I was good for as many as 3 or 4 days, and no worrying about power outages. Skippy had to work for his meals, but all the better. Now, an electric self-cleaning litterbox – THAT would be something worth warming up a soldering gun for.” Link.
Low tech version of the VCR Cat Feeder