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1. A Foot in the Front Door > 6. Keep Watch with Motion Detectors

Keep Watch with Motion Detectors

A key element in any smart home, motion detectors enable your system to react to you and your visitors as you move about your house.

The X10 wireless motion detector is a beautiful thing in the world of home automation. It’s small, inexpensive, and incredibly useful when it comes to creating a smart home. Nothing does a better job of impressing your friends than the lights coming on automatically when you enter a room and turning off after you’ve left. And that’s just the tip of the iceberg for what you can do with these beauties.

A typical motion detector, the X10 MS-14A Eagle Eye, is shown in Figure 1-8. About 2.5 inches square and powered by two AAA batteries, the MS-14A (http://www.smarthome.com/4086.html; $20) is mounted easily on the wall or ceiling with double-stick tape. When the detector senses motion, it sends a signal wirelessly, so you’ll need an X10 transceiver [Hack #5] nearby to receive and convert the signal to an X10 command for your computer and other modules to see.


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