What is the HC-SR04 Ultrasonic Sensor?
- The HC-SR04 Ultrasonic Sensor is a device that helps to measure the distance.
- It does this by sending out a sound wave, which is too high-pitched for our ears to hear.
- When this sound wave hits something and bounces back, the sensor listens carefully and figures out how long it took for the sound to return.
- This sensor provides 2cm to 400cm (~13 feet) of non-contact measuring range with an accuracy of up to 3mm.
- This ultrasonic Sensor operates on 40KHz ultrasonic sound pulses which humans cannot hear.
HC-SR04 Ultrasonic Sensor Pinout
The HC-SR04 Ultrasonic Sensor has four pins:
- VCC
- Trigger
- Echo
- Ground
Specifications
|
Operating Voltage |
DC 5V |
|
Operating Current |
15 mA |
|
Operating Frequency |
40kHz |
|
Max Range |
4m |
|
Min Range |
2 cm |
|
Ranging Accuracy |
3 mm |
|
Measuring Angle |
15 degree |
|
Trigger Input Signal |
10µS TTL pulse |
|
Dimension |
45 x 20 x 15mm |
HCSR-04 Ultrasonic Sensor Interfacing with Arduino Uno R3
Install Required Libraries
To install the library, navigate to Sketch > Include Libraries > Manage Libraries and now wait for the Library Manager window (You can use the shortcut key Ctrl+Shift+I) to install the library.
Now type the NewPing on the search bar and install the updated version.
HCSR-04 Ultrasonic Code for Arduino:
#include "NewPing.h"
#define TRIGGER_PIN 9
#define ECHO_PIN 10
#define MAX_DISTANCE 400
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE);
void setup() {
Serial.begin(9600);
}
void loop() {
Serial.print("Distance = ");
Serial.print(sonar.ping_cm());
Serial.println(" cm");
delay(500);
}
#include "NewPing.h"
#define TRIGGER_PIN 9
#define ECHO_PIN 10
#define MAX_DISTANCE 400
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE);
void setup() {
Serial.begin(9600);
}
void loop() {
Serial.print("Distance = ");
Serial.print(sonar.ping_cm());
Serial.println(" cm");
delay(500);
}
