Smart Security System | Arduino UNO | IR + Servo + LCD + Keypad 🔐 Smart Security System Arduino UNO · IR Sensors · Servo · LCD · Keypad · Buzzer 🔎 What is This Project? This is a Password-Protected Car Parking System built with Arduino UNO. It manages parking slots, controls a servo barrier, and uses IR sensors to detect cars entering and exiting. Features: 🔐 4×4 Keypad – for password authentication (Entry) 📡 2× IR Sensors – Entry (IR1) and Exit (IR2) detection 🔄 SG90 Servo Motor – automatic barrier control 📟 16×2 LCD with I²C – displays slot availability and status 🔊 Active Buzzer (MH-FMD) – audio feedback (active-LOW) ⚙️ How It Works • The system continuously monitors IR sensors for car entry and exit. • When a...