Amazon.com: LEGO MINDSTORMS EV3 Building Set Includes 3 Interactive Servo Motors, Remote Control, Improved And Redesigned Color Sensor, Redesigned Touch Sensor, Infrared Sensor And 550+ LEGO Technic Elements : Toys & Games
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How to Program the EV3 Ultrasonic Sensor - YouTube
How To Program The EV3 Ultrasonic and Touch Sensors - YouTube