Ultrasonic Sensor Breakout SRF04

Introduction

Ultrasonic sensor is non-contact distance measurement module, which is also compatible with electronic brick. It’s designed for easy modular project usage with industrial performance.

Features

• Detecting range: 3cm-4m
• Best in 30 degree angle
• Electronic brick compatible interface
• 5VDC power supply
• Breadboard friendly
• Dual transducer
• Arduino library ready

Specification

Supply voltage	5V
Global Current Consumption	15 mA
Ultrasonic Frequency	40k Hz
Maximal Range	400 cm
Minimal Range	3 cm
Resolution	1 cm
Trigger Pulse Width	10 μs
Outline Dimension	43x20x15 mm

Usage

Ultra Sonic Timing Diagram

Programming

<syntaxhighlight lang="c"> const int pingPin = 7; const int start_signal = 8; void setup() {

 Serial.begin(9600);

} void loop() {

 long duration, inches, cm;
 pinMode(pingPin, OUTPUT);
 pinMode(start_signal, OUTPUT);
 digitalWrite(start_signal, HIGH);
 delayMicroseconds(20);
 digitalWrite(start_signal, LOW);
 digitalWrite(pingPin, LOW);
 delayMicroseconds(2);
 digitalWrite(pingPin, HIGH);
 delayMicroseconds(5);
 digitalWrite(pingPin, LOW);
 pinMode(pingPin, INPUT);
 duration = pulseIn(pingPin, HIGH);
 inches = microsecondsToInches(duration);
 cm = microsecondsToCentimeters(duration);  
 Serial.print(inches);
 Serial.print("in, ");
 Serial.print(cm);
 Serial.print("cm");
 Serial.println(); 
 delay(80);

} long microsecondsToInches(long microseconds) {

 return microseconds / 74 / 2;

} long microsecondsToCentimeters(long microseconds) {

 return microseconds / 29 / 2;

} </syntaxhighlight>

How to buy

Here to buy Ultrasonic Sensor Breakout SRF04 on store