Yes, Andrew, I was also impressed by the complexity of this gadget. As for the pdf, we actually asked for a shorter version. In the end the production folks decided they could post the entire novel-length code.
Yes, it is a very cool gadget. The only thing I can say is that our cats would not wear it. They have destroyed all the collars we have gotten them. We also don't board the cats. They are easy to care for and we can get neighbors to come over and feed them.
Yes, I can understand what you're saying about cats, Naperlou. Over the years, my dogs have been fine with collars, but I've never even tried to get one of my cats to wear a collar. It will be interesting to hear what our gadget maker says about this.
If you want your cat to wear a collar, then it's best to start with them when they are young. They just expect that to be normal from then on.
If you try anything like this at home, then please do use a proper collar bought from a pet store. Cats can be strangled in the event they get it hooked up on a branch. That's extremely rare and can be avoided entirely by buying one designed to break when that happens. I just bought a cheap flea collar for this project. It is designed to expand and break under the weight of the cat.
@pete.cross: That's a very interesting master's thesis ("Control, communication and monitoring of intravaginal drug delivery in dairy cows"). I'd imagine that getting a cat to wear a collar is very simple in comparison.
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A Design News contributor takes on the challenge of building an old-fashioned metric clock that uses French Revolutionary time, which divides the day into decimal units, and shows you how to build your own.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.