Titlebook: Extreme NXT; Extending the LEGO M Michael Gasperi,Philippe “Philo” Hurbain Book 2009Latest edition Michael Gasperi and Philippe Hurbain 200

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Resistive Sensors,e? The term is a carryover from the old RCX days when there were only two types of sensors: those that required a power supply and those that didn’t. You probably figured out that passive sensors were the type that didn’t. The contact sensors you learned about in Chapter 4 were also passive sensors.

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Potentiometer Sensors,ith the rotation of a mechanical shaft. You’re probably already familiar with the device because it’s commonly used as the volume control on audio equipment. Rotating the shaft changes the resistance between the center and outer two terminals. It’s a kind of self-contained voltage divider. Usually t

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