My new hobby is flying RC airplanes. It sounds pretty geeky and a bit childish, but man is it Zen. Also it isn't as geeky as my friend's new hobby which is ham radio.
I've resurrected an automatic kitty feeder at home with a video camera. The quality of kitty feeders on the market seems to vary from bad to awful. In our case, our feline thief was able to simply paw at the feeder door causing an enormous amount of food to dump out on the floor. So I built an attachment to cover the door. So far so good. Here is a video of the first test.