ULTRASONIC SENSOR INTERFACE USING ARDUINO - Project Center in Trichy IOT EEE Internship Final Year- Power Integrated

ULTRASONIC SENSOR INTERFACE USING ARDUINO

📡 Ultrasonic SENSOR Interface with Arduino – Short Note

Overview:

An ultrasonic sensor is used to measure distance by using ultrasonic sound waves. It works based on “echo ranging” — it sends a sound wave and measures the time it takes to bounce back.

The most commonly used module is the HC-SR04.

✅Working Principle:

The Trigger pin sends an ultrasonic pulse (8 cycles of 40 kHz).
The Echo pin receives the reflected wave.
The time between sending and receiving is used to calculate distance:

$(µs)×0.03432\text{Distance (cm)} = \frac{\text{Time (µs)} \times 0.0343}{2}$

🔌Connection:

HC-SR04 Pin Arduino Pin
VCC 5V
GND GND
TRIG Digital Pin (e.g., 9)
ECHO Digital Pin (e.g., 10)

HC-SR04 Pin	Arduino Pin
VCC	5V
GND	GND
TRIG	Digital Pin (e.g., 9)
ECHO	Digital Pin (e.g., 10)

🔌 Circuit Diagram:

📝 Sample Arduino Code:

#define TRIG_PIN 9
#define ECHO_PIN 10
#define BUZZER_PIN 8

void setup() {
pinMode(TRIG_PIN, OUTPUT);
pinMode(ECHO_PIN, INPUT);
pinMode(BUZZER_PIN, OUTPUT);
Serial.begin(9600);
}

void loop() {
long duration;
float distance;

// Trigger the ultrasonic pulse
digitalWrite(TRIG_PIN, LOW);
delayMicroseconds(2);
digitalWrite(TRIG_PIN, HIGH);
delayMicroseconds(10);
digitalWrite(TRIG_PIN, LOW);

// Measure the duration of echo
duration = pulseIn(ECHO_PIN, HIGH);

// Calculate the distance (cm)
distance = duration * 0.034 / 2;

// Display distance on Serial Monitor
Serial.print(“Distance: “);
Serial.print(distance);
Serial.println(” cm”);

// Control buzzer based on distance
if (distance < 5.0) {
digitalWrite(BUZZER_PIN, HIGH); // Buzzer ON
} else {
digitalWrite(BUZZER_PIN, LOW); // Buzzer OFF
}

delay(500);
}

🔧 Applications:

Obstacle detection
Robotic navigation
Smart parking systems
Level measurement (tank, bins)

📞 For More Details & Project Support:

📍 Location:
10A/3, Radhakrishnan Colony,
Sasthri Road, Tennur,
Tiruchirappalli, Tamil Nadu – 620017

📍 View on Google Maps

📧 Email:

contact@powerintegrated.in
powerintegratedsolutions@gmail.com

📱 Phone / WhatsApp:
+91 76393 85448
+91 82488 85959

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