Arduino-Ultrasonic-Distance-Meter

An Arduino-based Distance Meter using HC-SR04 Ultrasonic Sensor and I2C LCD. Features a dynamic buzzer alarm that beeps faster as objects get closer.

✨ Features

• Accurate Sensing: Range within 2 to 334.75, not crossing 334.75, tested!
• Dynamic Buzzer: Buzzer sounds as the object came closer.

🛠️ Components Needed

• Arduino Uno
• HC-SR04 Ultrasonic Sensor
• I2C LCD Display (16x2)
• Piezo Buzzer
• Breadboard & Jumper Wires

🔌 Circuit Connection

Component	Arduino Pin
Ultrasonic Trig	Pin 9
Ultrasonic Echo	Pin 13
Buzzer (+)	Pin 8
LCD SDA	A4
LCD SCL	A5
All VCC	5V
All GND	GND

🚀 How to Run

1. Clone this repository or download the .ino file.
2. Install the Adafruit_LiquidCrystal library in your Arduino IDE.
3. Upload the code to your Arduino Uno.
4. Open the Serial Monitor or check the LCD for readings.

📝 Code Logic (The 'Map' Function)

আমরা map() ফাংশন ব্যবহার করেছি বিপ-সাউন্ডের বিরতি সেট করতে: int wait = map(distance, 2, 100, 50, 500);

• 2cm distance = 50ms delay (Fast beep)
• 100cm distance = 500ms delay (Slow beep)

📸 Screenshots

While Object available

While Object unavailable

Circuit Diagram