How To: Use an Arduino with an Ultrasonic Sensor (HC-SR04)

This video is about using the popular HC-SR04 Ultrasonic Sensor with an Arduino Uno to make distance measurements. You can use these measurements in many applications from robot object avoidance to parking sensors.

For more information see this post: nonscio.com/blog/q9gjkd7zg5llfkp0ghnfwecqy2oxas

See how this can be used to help a robot navigate autonomously! youtu.be/IvulErD05rA

#define echoPin 7
#define trigPin 8

long duration;
long distance;

void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
pinMode(echoPin,INPUT);
pinMode(trigPin,OUTPUT);
}

void loop() {
// put your main code here, to run repeatedly:
digitalWrite(trigPin,LOW);
delayMicroseconds(2);
digitalWrite(trigPin,HIGH);
delayMicroseconds(10);
digitalWrite(trigPin,LOW);
duration = pulseIn(echoPin,HIGH);
distance = duration/58.2;
Serial.print(distance);
delay(50);
}