In the wake of public health concerns like COVID-19, maintaining proper social distancing became a critical preventive measure. This project presents a Social Distance Detector that helps individuals keep a safe distance using simple embedded systems.

The system uses an HC-SR04 Ultrasonic Sensor to continuously measure the distance between people. If the detected distance is less than a predefined threshold (e.g., 1 meter), the system immediately triggers an alert through a buzzer and displays a warning on a 16x2 LCD display.

This low-cost, real-time solution can be used at entry gates, offices, public transport stations, and classrooms to promote safe social interactions.

🛠️ Components Used:

• Arduino Uno – Brain of the system
• HC-SR04 Ultrasonic Sensor – Measures the distance between people
• 16x2 LCD Display (with I2C if needed) – Displays the measured distance and warning messages
• Buzzer – Provides an audible alert when social distancing is violated
• Breadboard and Jumper Wires – For connections
• Power Source (USB or Battery)

💡 How It Works:

Distance Measurement: The ultrasonic sensor emits ultrasonic waves and receives the echo reflected from the nearby person.

Distance Calculation: Arduino calculates the time taken for the echo and converts it into distance (in cm).

Alert System:

If the distance ≥ 100 cm → "Safe Distance" is displayed.

If the distance < 100 cm → Buzzer beeps and "Too Close! Maintain Distance!" is shown on the LCD.

📺 Watch it in Action!

See the live demo of our Social Distance Detector project on YouTube:

👉https://youtube.com/shorts/2F97WHw5lDE?feature=shared

This video demonstrates how the system detects distances using the ultrasonic sensor and provides instant feedback through the buzzer and 16x2 LCD display. When someone comes closer than 100 cm, a warning is triggered — making it an ideal solution for social distancing in public areas.