NXT Sensor Resources
Line Following Programming Steps-Project 10 (created by Neil Rosenberg)
These Line Following instructions can be adapted for use with the ultrasonic sensor.
The ultrasonic sensor can also be used to detect lines and edges on the mat/table. My teams members have found it easier to work with the ultrasonic sensor than the light sensors when attempting to detect the edges of a table.
EV3 Sensor Resources
Here is a very detailed breakdown of sensors for EV3 with Features and Comparison: http://www.intorobotics.com/sensors-lego-mindstorms-ev3-features-comparison/
Focusing on the EV3 Ultrasonic Sensor (technical): http://www.ev-3.net/en/archives/844
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