Arduino #10 - Ultrasonic HC-SR04 Range Sensor - Robotics Arduino Tutorial

Relevant Tutorials:
- PWM:

In the 10th Tutorial we take a look at the HC-SR04 ultrasonic sensor. The sensor is a four pin device capable of sending an ultra sonic wave and capturing the returning signal. Based on the duration of the input signal, the user is able to figure out what the distance to the nearest device is.

The important functions in this tutorial are delayMicroseconds() and pulseIn().

- delayMicroseconds():
- pulseIn():

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