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Learning LEGO MINDSTORMS EV3 by Gary Garber

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LEGO EV3 sensors

We are now going to try using all of the sensors. I will focus mostly on the Touch, Color, and rotation sensors, as those are common to both editions of the EV3 set.

Touch Sensors

Like most of the EV3 sensors, the Touch Sensor can be attached to your robot using either pins or axles as shown in the following screenshot. The Touch Sensor is a logic sensor with only two positions: on or off. Thus, the output of a Touch Sensor is either a 0 (for released) or 1 (for pressed). Although it is straightforward to press the red button to activate the Touch Sensor, you can mechanically extend its range by inserting an axle into the red button on the Touch Sensor, as shown in the screenshot. If you didn't want to attach the Touch Sensor to ...

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