# 😀 Demo_11_Smart Distance Detection Alarm System

## Functional Description
Integrates ultrasonic distance measurement, LCD display, buzzer alarm, and LED matrix indication to implement a complete multi-level distance detection and alarm system.

## System Architecture
•	Input: HC-SR04 Ultrasonic Sensor
•	Output: LCD1602 displays distance, buzzer provides graded alarm, MAX7219 matrix shows arrow indicators
•	Logic: Distance < 10cm = Emergency alarm, 10-30cm = Warning, > 30cm = Safe
