🚗 Parking-Sensor

This project is a simple but effective car parking sensor system built using an Arduino board, an ultrasonic distance sensor, a buzzer, and an RGB LED. The sensor continuously measures the distance to the nearest object (e.g., a wall or another car) and provides both auditory and visual feedback to help with parking.

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📦 Features

• Real-time distance measurement using an ultrasonic sensor
• Variable-pitch sound alerts via a buzzer (higher pitch = closer object)
• RGB LED status indication:
  • 🔴 Red: Object very close (under 20cm)
  • 🟡 Yellow: Caution zone (20–50cm)
  • 🟢 Green: Safe distance (50–100cm)
  • 🔵 Blue: No object detected / out of range

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🔧 Components Used

• Arduino Uno
• Ultrasonic sensor (HC-SR04)
• Passive buzzer
• RGB LED (common cathode)

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🛠️ How It Works

• The ultrasonic sensor (HC-SR04) is connected to digital pins 6 (trigger) and 5 (echo).
• The buzzer is connected to digital pin 7.
• The RGB LED is connected to PWM-enabled pins 9 (Red), 10 (Green), and 11 (Blue).
• The sensor reads distance in centimeters.
• If the distance is greater than 100cm, the LED turns blue and no sound is emitted.
• If the object is within 100cm, the buzzer emits a beep with a frequency that increases as the object gets closer.
• The RGB LED color reflects the distance range.

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