Introduction
HC-SR04 is a ultrasonic ranging module which is working like bats.ie it uses sonar technique for ranging.This module is widely used in between arduino hackers and diy enthusiast.The main attraction of this module is it is one of the simplest module and can be recommend to any newbie
Applications
HC-SR04 is a module which can be used in various applications in our DIY projects.
- As obstacle detector in obstacle avoiding robot.
- In walking assistant system for visually impaired people.
- As parking sensor in vehicles.
- As sensor in bugler alarm type projects.
Example project
Arduino based ultrasonic obstacle detector
components needed
- Arduino ProMini x 1
- HC-SR04 x1
- Buzzer x 1
- LED x 1
- 220 ohm resistor x1
Connections
Arduino HC-SR04
pin 9 trig
pin8 echo
vcc vcc
gnd gnd
arduino pin 6 is connected to LED.
arduino pin A3 is connected to a buzzer.
arduino can be power via usb/ftdi or a 5v battery
working
In this demo project HC-SR04 is used as simple obstacle detector.it detects objects in front and will reply how far the obstacle is from the sensor.If an obstacle is detected it will alarm with a buzzer.If the obstacle is very close the led will ON.
Arduino code
//http://anasdalintakam.blogspot.com/2016/06/playing-with-hc-sr04-ultrasonic-ranging.html
//this is a simple project to demo working of HC-SR04
//connctions
//pin9-hcsr04 trig
//pin8-hcsr04 echo
//vcc-hcsr04 vcc
//gnd-hcsr04 gnd
//pin6-led
//pin A3-buzzer
int trig=9;
int echo=8;
int duration;
float distance;
int val;
float meter;
void setup()
{
Serial.begin(9600);
pinMode(trig, OUTPUT);//trigger to hcsr04
pinMode(echo, INPUT);//echo from hcsr04
pinMode(6,OUTPUT);// led pin
pinMode(A3,OUTPUT);// buzzer pin
digitalWrite(trig, LOW);
delayMicroseconds(2);
delay(6000);
Serial.println("Distance:");
}
void loop()
{
digitalWrite(trig, HIGH);
delayMicroseconds(10);
digitalWrite(trig, LOW);
duration = pulseIn(echo, HIGH);
if(duration>=38000){
Serial.print("Out range");
}
else{
distance = duration/58;
val=200-distance;
Serial.print("value:");
Serial.print(val);
Serial.print("\n");
Serial.print(distance);
Serial.print("cm");
meter=distance/100;
Serial.print("\t");
Serial.print(meter);
Serial.println("m");
if (distance >10){
digitalWrite(6,LOW);
}
else {
digitalWrite(6,HIGH);
}
analogWrite(A3,val);
}
// delay(1000);
}
Good one. Man
ReplyDeleteThank you
ReplyDeleteNice work... Very helpful
ReplyDeleteNice work... Very helpful
ReplyDeleteThank you.keep reading
DeleteThank you.keep reading
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