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Ultrasonic Sensor HC-SR04 with Arduino


Ultrasonic Sensor HC-SR04 with Arduino

- A guide for the Ultrasonic Sensor HC-SR04 with Arduino provides step-by-step instructions for integrating and using this sensor in electronic projects. The HC-SR04 Ultrasonic Sensor is designed to measure distance by emitting ultrasonic pulses and calculating the time it takes for the signal to bounce back. The guide typically includes wiring instructions, sample Arduino code, and explanations on interpreting sensor readings. By following this guide, enthusiasts can effectively implement the HC-SR04 Ultrasonic Sensor with Arduino, enabling their projects to measure distances accurately and facilitating applications such as obstacle avoidance in robotics, smart parking systems, or interactive installations.

- The HC-SR04 Ultrasonic Sensor is commonly used for distance measurement. It works by sending ultrasonic waves and measuring the time it takes for the waves to bounce back, allowing you to calculate the distance to an object. Here's a basic guide on how to connect and use an Ultrasonic Sensor HC-SR04 with an Arduino:

Ultrasonic Sensor HC-SR04 with Arduino

Components Needed:

- Arduino board (e.g., Arduino Uno)

- HC-SR04 Ultrasonic Sensor

- Breadboard and jumper wires

 Wiring:

Connect the HC-SR04 Ultrasonic Sensor as follows:

Connect the VCC pin to 5V on Arduino.

Connect the GND pin to GND on Arduino.

Connect the TRIG pin to a digital pin on Arduino (e.g., D2).

Connect the ECHO pin to another digital pin on Arduino (e.g., D3).

Arduino Code:

Here's a simple example to read the distance using the HC-SR04 Ultrasonic Sensor:


int trigPin = 11;    // Trigger

int echoPin = 12;    // Echo

long duration, cm, inches;

void setup() {

  //Serial Port begin

  Serial.begin (9600);

  //Define inputs and outputs

  pinMode(trigPin, OUTPUT);

  pinMode(echoPin, INPUT);

}

void loop() {

  // The sensor is triggered by a HIGH pulse of 10 or more microseconds.

  // Give a short LOW pulse beforehand to ensure a clean HIGH pulse:

  digitalWrite(trigPin, LOW);

  delayMicroseconds(5);

  digitalWrite(trigPin, HIGH);

  delayMicroseconds(10);

  digitalWrite(trigPin, LOW);

  // Read the signal from the sensor: a HIGH pulse whose

  // duration is the time (in microseconds) from the sending

  // of the ping to the reception of its echo off of an object.

  pinMode(echoPin, INPUT);

  duration = pulseIn(echoPin, HIGH);

  // Convert the time into a distance

  cm = (duration/2) / 29.1;     // Divide by 29.1 or multiply by 0.0343

  inches = (duration/2) / 74;   // Divide by 74 or multiply by 0.0135

  Serial.print(inches);

  Serial.print("in, ");

  Serial.print(cm);

  Serial.print("cm");

  Serial.println();

  delay(250);

}

Interpretation:

The distance is calculated using the speed of sound in the air, which is approximately 343 meters per second (or 0.034 centimeters per microsecond).

Note:

Make sure to connect the sensor pins correctly and avoid short circuits.

Adjust the pin numbers in the code to match your actual wiring configuration.

This example provides a basic setup for distance measurement using the HC-SR04 Ultrasonic Sensor with Arduino. Depending on your project requirements, you may want to implement more sophisticated distance interpretation or integrate the sensor readings into a larger project.

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