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Robot Builder's Bonanza, 4th Edition, 4th Edition by Gordon McComb

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Chapter 43Proximity and Distance Sensing

You’ve spent hundreds of hours designing and building your latest robot creation. It’s filled with complex little doodads and precision instrumentation. You bring it into your living room, fire it up, and step back. Promptly, the beautiful new robot smashes into the fireplace and scatters itself over the living room rug. You remembered things like motor speed controls, electronic eyes and ears, even a synthetic voice, but you forgot to provide your robot with the ability to look before it leaps.

Proximity and distance sensing is all about collision avoidance. These systems take many forms, and the most basic are easy to build and use. In this chapter, we present a number of passive and active detection ...

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