This project presents an Arduino-based Parking Sensor System designed to assist drivers in avoiding collisions while reversing vehicles. The system integrates an HC-SR04 ultrasonic sensor to measure the distance between the vehicle and nearby obstacles. Based on the measured distance, a buzzer generates audio beeps and an LED provides visual alerts, both increasing in intensity as the vehicle approaches an obstacle. The solution is low-cost, efficient, and easy to implement, making it ideal for smart vehicle assistance and DIY embedded system applications.
The Parking Sensor System is built around an Arduino microcontroller, programmed in C/C++ to control the sensor and output devices. The HC-SR04 ultrasonic sensor continuously measures the distance to obstacles by emitting ultrasonic waves and detecting their echo. The measured distance is then processed by the Arduino, which activates:
- LED indicators that glow when the vehicle is within a critical range.
- Buzzer alerts that change frequency (slow → fast → continuous) based on proximity.
This simple yet effective system mimics commercial reverse parking sensors, enhancing driver safety and vehicle protection. It can be further extended with multiple sensors, LCD displays, or wireless modules for advanced features.
- Arduino Uno
- Ultrasonic Sensor (HC-SR04)
- Buzzer
- LED
- Jumper Wires & Breadboard
The Arduino code is available in Parking_Sensor.ino.
- Ultrasonic sensor measures the distance of obstacles.
- If the obstacle is closer than 30 cm:
- Buzzer turns ON.
- LED turns ON.
- Otherwise:
- Buzzer and LED remain OFF.
- Sensor interfacing with Arduino.
- Microcontroller programming in C/C++.
- Embedded systems prototyping.
- M. Pavan Kumar