Part Name: HC-SR04 Ultrasonic Sonar Distance Sensor

Part Description: The ultrasonic sonar distance sensor in your kit is a sensor that is capable of measuring short to medium distances from solid surfaces via sonar location. Ultrasonic sound waves are emitted from the device which bounce off of surfaces. The return waves are measured and the time taken to return (along with the known speed of travel) are used to calculate distance. Commonly, ultrasonic sensors are used for applications like automated navigation in robots.

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Figure 1. Ultrasonic sensor from Adafruit.

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