Arduino Tutorial - Ultrasonic Sensor HC-SR04 with Buzzer and LED Tutorial HIndi Video

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Description:
In this Arduino Tutorial we will learn how the HC-SR04 Ultrasonic Sensor works and how to use it with Buzzer and LED. And this same system can be used as a Car Peking System and other Projects.

Hardware Required:
- Arduino Board - Buy Now From Amazon
- Ultrasonic Sensor HC-SR04 - Buy Now From Amazon
- Buzzer - Buy LED,Buzzer, Resister and Other Component all in one
- LED - Buy LED,Buzzer, Resister and Other Component all in one
- 220ohm Resistor - Buy LED,Buzzer, Resister and Other Component all in one
- Breadboard and Jump Wires - Buy Now From Amazon


Connections:
HC-SR04 Sensor

- The HC-SR04 Ultrasonic Module has 4 pins, Ground, VCC, Trig and Echo. The Ground and the VCC pins of the module needs to be connected to the Ground and the 5 volts pins on the Arduino Board respectively and the trig and echo pins to any Digital I/O pin (i am using 9 for Trig and 10 for Echo) on the Arduino Board.
- The HC-SR04 sensor attach to the Breadboard
- The Sensor VCC connect to the Arduino Board +5V
- The Sensor GND connect to the Arduino Board GND
- The Sensor Trig connect to the Arduino Board Digital I/O 9
- The Sensor Echo connect to the Arduino Board Digital I/O 10

Buzzer and LED

- The Buzzer attach to the Breadboard
- The Buzzer long leg (+) connect to the Arduino Board Digital 11
- The Buzzer short leg (-) connect to the Arduino Board GND
- The LED attach to the Breadboard
- The Resistor connect to the LED long leg (+)
- The Resistor other leg (from LED's long leg) connect to the Arduino Board Digital 13
- The LED short leg (-) connect to the Arduino Board GND

Code
Replace if (safetyDistance <= 5) 5 with your distance more will catch from more distance.

	//www.ilovetech.info
	// defines pins numbers
	const int trigPin = 9;
	const int echoPin = 10;
	const int buzzer = 11;
	const int ledPin = 13;
	// defines variables
	long duration;
	int distance;
	int safetyDistance;
	void setup() {
	pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
	pinMode(echoPin, INPUT); // Sets the echoPin as an Input
	pinMode(buzzer, OUTPUT);
	pinMode(ledPin, OUTPUT);
	Serial.begin(9600); // Starts the serial communication
	}
	void loop() {
	// Clears the trigPin
	digitalWrite(trigPin, LOW);
	delayMicroseconds(2);
	// Sets the trigPin on HIGH state for 10 micro seconds
	digitalWrite(trigPin, HIGH);
	delayMicroseconds(10);
	digitalWrite(trigPin, LOW);
	// Reads the echoPin, returns the sound wave travel time in microseconds
	duration = pulseIn(echoPin, HIGH);
	// Calculating the distance
	distance= duration*0.034/2;
	safetyDistance = distance;
	if (safetyDistance <= 5){
	digitalWrite(buzzer, HIGH);
	digitalWrite(ledPin, HIGH);
	}
	else{
	digitalWrite(buzzer, LOW);
	digitalWrite(ledPin, LOW);
	}
	// Prints the distance on the Serial Monitor
	Serial.print("Distance: ");
	Serial.println(distance);
	}

view raw Ultrasonic_Code.ino hosted with ❤ by GitHub