CHAPTER 9
Project 2: Crazy Beams—Exercise Your Pet!
In this project we are going to try to give your pet (your cat or your dog) hours of harmless fun and exercise. This project is a little like the gem light project we looked at in Chapter 4. This time, though, we’re not out to do something ornamental; this time we have a functional aim in mind: keeping the animals entertained!
The idea for this project came from observing how much fun it can be to watch a cat or dog trying to catch the light spot cast from a presentation pointer. You’ve seen these things; they are very low-powered laser lights, usually no more than 5 mw and often built into ...
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