Detecting Obstacles and Warning - Arduino and Ultrasonic

This is a tutorial to help you understand ultrasonic and buzzer and go deeper into learning Arduino.
Detecting Obstacles and Warning - Arduino and Ultrasonic

Connect the Buzzer positive terminal to the Arduino pin 2 and the negative terminal to the Gnd. Connect the VCC pin of ultrasonic to +5v pin and the Gnd to the ground. Connect trig pin to pin 10 and echo pin to pin 9.

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