COVID-19 UPDATE
Dear customers, Postal services are under pressure to deliver necessary goods and the delays are very common these days.
We are shipping only Monday and Thursdays to reduce the postal service load and only trackable options available.
Thanks for your support since 2008 and Take Care. #Stay at Home



COVID-19 UPDATE
After the UK government's new pandemic counter-measures,
We are unable to ship your orders for an unknown period,
Thanks for your support since 2008 and Take Care. #StayAtHome



If you like to be informed when we get back, please sign up to our newsletter

HC-SR04 Ultrasonic Sensor

  • £2.95
    Unit price per 
Tax included.


The HC-SR04 ultrasonic sensor uses sonar to determine the distance to an object like bats or dolphins do. It offers excellent range accuracy and stable readings in an easy-to-use package. It operation is not affected by sunlight or black material like Sharp rangefinders are (although acoustically soft materials like cloth can be difficult to detect). Similar in performance to the SRF005 but with the low-price of a Sharp infrared sensor.

 

  • Power Supply :5V DC
  • Quiescent Current : <2mA
  • Effectual Angle: <15°
  • Ranging Distance : 2cm – 500 cm/1" - 16ft
  • Resolution : 0.3 cm

  

Using the HC-SR04 with an Arduino 

There is an Arduino library for the HC-SR04 that offers two ways to use the sensor. To install, download the “Ultrasonic Library” from this page, unzip the release package into your “Arduino-0022/libraries/” folder. Open the Arduino IDE and include the library by Sketch-Import library-Ultrasonic. There is also an example sketch in File-Examples-Ultrasonic-UltrasonicDemo. 
 

Arduino Library & Sample


You can directly connect it to your arduino board and measure the distance without wiring with this sketch.


#include <Ultrasonic.h>

int trigpin = 10;//appoint trigger pin
int echopin = 11;//appoint echo pin

Ultrasonic ultrasonic(trigpin,echopin);

void setup()
{
Serial.begin(9600);//set Serial Baud rate
Serial.println("Ultrasonic sensor starting!!!!!");

pinMode(9, OUTPUT);
pinMode(12, OUTPUT);
digitalWrite(9, HIGH);
digitalWrite(12, LOW);

}

void loop()
{
float cmdistance,indistance;
long microsec = ultrasonic.timing();
Serial.print("microsec: ");
Serial.print(microsec);
cmdistance = ultrasonic.CalcDistance(microsec,Ultrasonic::CM);//this result unit is centimeter
indistance = ultrasonic.CalcDistance(microsec,Ultrasonic::IN);//this result unit is inches
Serial.print(" cmdistance: ");
Serial.print(cmdistance);
Serial.print(" indistance: ");
Serial.println(indistance);
delay(1000);
}