Skip to content

Ultrasonic Ranging Sensor Module

Introduction

Description: This HC-SR04 Ultrasonic Ranging Sensor is a non-contact distance measurement module with stable performance and high ranging accuracy. with the inexpensive price, The measurment range if it can be upto 5M, which would be helpful for your project such as robotic Obstacle Avoidance and so on.
Model: SOD00201S

Ultrosonic11.jpg Ultrosonic21.jpg

Alt text

Features

  • Power supply: 5V DC.
  • Effectual angle: <15°.
  • Ranging distance: 25cm – 500 cm.
  • Resolution: 1 cm.
  • Ultrasonic Frequency: 40k Hz.

Usage

Ultrasonic10.jpg Ultrasonic11.png
A short ultrasonic pulse is transmitted at the time 0, reflected by an object. The senor receives this signal and converts it to an electric signal. The next pulse can be transmitted when the echo is faded away. This time period is called cycle period. The recommend cycle period should be no less than 50ms. If a 10μs width trigger pulse is sent to the signal pin, the Ultrasonic module will output eight 40kHz ultrasonic signal and detect the echo back. The measured distance is proportional to the echo pulse width and can be calculated by the formula above. If no obstacle is detected, the output pin will give a 38ms high level signal.

Hardware

Connect this triple axis magnetometer breadkout module to your Arduino/Crowduino I2C wires(SDA:A4, D18;SCL:A5, D19)as below:
Ultrosonic hard.jpg

Programming

Copy the following program to Arduino IDE and upload to your Arduino/Crowduino, you can also download the example in the Resource.

#include "Ultrasonic.h"

Ultrasonic ultrasonic(12,13);
void setup() {
Serial.begin(9600);
}

void loop()
{
Serial.println(ultrasonic.Ranging(CM));
delay(100);
}

Open the Sscom32 terminal or the Serial moniter , and set the baudrate to 9600, you will see the output changing with the object distance.
Ultrasonic sensor result.jpg

Resource

File:Ultrosonic ranger module Library and demo code for arduino 10.zip