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3.2. Motion Detection

You want to take a picture only when your pet is active, so you need to know when your pet is moving and which room he is in. As you're probably well aware of by now, this feat can be easily accomplished using motion detectors.

For this project, you have two main considerations when choosing a motion detector: it needs to connect to your Linux computer (which is located in a different room) and it needs to be cheap. After looking around on the Web, I decided the best option was a wireless X10 motion detector. They cost only $20 each, they're wireless and battery powered, and a Linux computer can intercept their signals using a simple script.


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