Ultrasonic Ranging Module HC-SR04 ,

 22.0

Product ID: 2067 SKU: sen-2067 Categories: , Tags: , , ,

If you are sourcing a ultrasonic ranging module , the HC-SR04 is good choose . Its stable performance and high ranging accuracy make it a popular module in electronic market .Compared to the Shap IR ranging module , HC-SR04 is more inexpensive than it . But it has the same ranging accuracy and longer ranging distance.

Specifications

  • Power supply: 5V DC
  • Quiescent current: <2mA
  • Effectual angle: <15°
  • Ranging distance: 2cm – 500 cm
  • Resolution: 1 cm
  • Ultrasonic Frequency: 40k Hz

Datasheet

DS_IM120628012_HC_SR04.pdf    

Library

Lib_IM120628012_HC_SR04.zip

simple code

/*
 HC-SR04 Ping distance sensor]
 VCC to arduino 5v GND to arduino GND
 Echo to Arduino pin 13 Trig to Arduino pin 12
 Red POS to Arduino pin 11
 Green POS to Arduino pin 10
 560 ohm resistor to both LED NEG and GRD power rail
 More info at: http://goo.gl/kJ8Gl
 Original code improvements to the Ping sketch sourced from Trollmaker.com
 Some code and wiring inspired by http://en.wikiversity.org/wiki/User:Dstaub/robotcar
 */

#define trigPin 12
#define echoPin 13
#define led 11
#define led2 10

void setup() {
  Serial.begin (9600);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(led, OUTPUT);
  pinMode(led2, OUTPUT);
}

void loop() {
  long duration, distance;
  digitalWrite(trigPin, LOW);  // Added this line
  delayMicroseconds(2); // Added this line
  digitalWrite(trigPin, HIGH);
//  delayMicroseconds(1000); - Removed this line
  delayMicroseconds(10); // Added this line
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = (duration/2) / 29.1;
  if (distance < 4) {  // This is where the LED On/Off happens
    digitalWrite(led,HIGH); // When the Red condition is met, the Green LED should turn off
  digitalWrite(led2,LOW);
}
  else {
    digitalWrite(led,LOW);
    digitalWrite(led2,HIGH);
  }
  if (distance >= 200 || distance <= 0){
    Serial.println("Out of range");
  }
  else {
    Serial.print(distance);
    Serial.println(" cm");
  }
  delay(500);
}

 

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