Smart parking with Arduino

Project Description: Smart Parking Management System

This project implements a smart parking system capable of monitoring parking spots, controlling entry and exit gates using servo motors, and providing visual feedback using LEDs and an LCD. The system leverages the 74HC165 shift register to efficiently monitor the status of 4 parking spots while using minimal Arduino pins.

Key Features

1. Real-Time Parking Monitoring:

   • Monitors up to 4 parking spots using sensors connected to a 74HC165 shift register.
   • Displays the status of parking spots on a 16x2 LCD:
     • X: Spot is occupied.
     • Y: Spot is free.

2. Entry and Exit Control:

   • Entry IR Sensor: Detects incoming cars and opens the entry gate if a spot is free.
   • Exit IR Sensor: Detects outgoing cars and opens the exit gate.

3. LED Feedback:

   • Green LED: Lights up when the gate opens for an incoming car.
   • Red LED: Lights up if the parking lot is full and the entry gate cannot open.

4. Servo Motor Control:

   • Entry Gate Servo: Opens and closes the entry gate.
   • Exit Gate Servo: Opens and closes the exit gate.

5. Efficient Resource Usage:

• Uses a 74HC165 shift register to minimize the number of pins required to monitor parking spots.

System Workflow

1. Parking Spot Monitoring:

   • Sensors connected to the shift register detect whether a spot is occupied.
   • The status of all spots is displayed on the 16x2 LCD.

2. Entry Detection:

   • When a car is detected at the entry IR sensor:
     • If there’s at least one free spot:
       • The green LED turns on.
       • The entry gate servo opens for 500 ms, allowing the car to enter.
     • If all spots are full:
       • The red LED turns on for 500 ms, and the gate remains closed.

3. Exit Detection:

   • When a car is detected at the exit IR sensor, the exit gate servo opens for 500 ms to allow the car to exit.

4. Real-Time Display:

• The LCD continuously displays the status of all parking spots.