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Sensors 101

Half of robotics is sensors: it’s how we get information about the outside world into the robot! The Lego Mindstorms NXT system ships with four different types of sensors, including touch, light, and ultrasonic, as well as the rotation sensors built into the motors. Using these default sensors, you can make a wide variety of interesting robotics projects. However, there are many other kinds of sensors that you can easily use with your Arduino or NXT projects!

Digital Sensors

The simple sensors we’ll look at in this section can be classified into two categories: digital and analog. The first type of sensor, simple binary digital sensors, output either a very low value or a high value, traditionally called logic low and logic high, respectively. They are very easy to work with using both Arduino and NXT. The following are some of the more common types of digital sensors.


  

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