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Smart Car Parking System

An Arduino‑based automated parking model built by Nirvaan.

📘 Project Overview

Smart Car Parking System is an automated parking model built using Arduino, IR sensors, and a servo motor. It detects cars, opens the gate automatically, and updates available parking slots on an LCD display. This project helps reduce human effort and makes parking more efficient.

Objectives

✓Design a smart parking system using Arduino
✓Reduce human effort and save time
✓Make parking more organized
✓Automatically detect empty and filled slots

Hardware Used

🔩 Arduino UNO
🔩 IR Sensors
🔩 Servo Motor
🔩 Jumper Wires
🔩 LCD Display
🔩 Miniature cars (for demo)

How It Works

1
IR sensor detects when a car arrives at the parking gate.
2
Servo motor automatically opens the gate.
3
LCD display shows available parking slots.
4
When a car enters, the system updates the slot status.
5
If all slots are full, the display shows "Parking Full".

Circuit Diagram

🖼️ Project Gallery

💻 Arduino Code

#include <Servo.h>
#include <LiquidCrystal.h>

0.7 0.18 30)">"color:oklch(0.6 0.05 250)">// LCD pins: RS, E, D4, D5, D6, D7
LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
Servo gate;

const int IR_ENTRY = 2;
const int IR_SLOT1 = 3;
const int IR_SLOT2 = 4;
const int IR_SLOT3 = 5;
const int IR_SLOT4 = 6;

const int TOTAL_SLOTS = 4;

void setup() {
  pinMode(IR_ENTRY, INPUT);
  pinMode(IR_SLOT1, INPUT);
  pinMode(IR_SLOT2, INPUT);
  pinMode(IR_SLOT3, INPUT);
  pinMode(IR_SLOT4, INPUT);

  gate.attach(13);
  gate.write(0); 0.7 0.18 30)">"color:oklch(0.6 0.05 250)">// gate closed

  lcd.begin(16, 2);
  lcd.print(0.7 0.18 30)">"Smart Parking");
}

int countFreeSlots() {
  int free = 0;
  if (digitalRead(IR_SLOT1) == HIGH) free++;
  if (digitalRead(IR_SLOT2) == HIGH) free++;
  if (digitalRead(IR_SLOT3) == HIGH) free++;
  if (digitalRead(IR_SLOT4) == HIGH) free++;
  return free;
}

void loop() {
  int free = countFreeSlots();

  lcd.setCursor(0, 1);
  if (free == 0) {
    lcd.print(0.7 0.18 30)">"Parking Full   ");
  } else {
    lcd.print(0.7 0.18 30)">"Slots Left: ");
    lcd.print(free);
    lcd.print(0.7 0.18 30)">" ");
  }

  0.7 0.18 30)">"color:oklch(0.6 0.05 250)">// Car at entry gate
  if (digitalRead(IR_ENTRY) == LOW && free > 0) {
    gate.write(90);  0.7 0.18 30)">"color:oklch(0.6 0.05 250)">// open
    delay(3000);
    gate.write(0);   0.7 0.18 30)">"color:oklch(0.6 0.05 250)">// close
  }

  delay(200);
}

📦 Get the Project Files

Download the Arduino sketch and try the project at home.

Built by Nirvaan — inspiring kids to learn robotics through fun and practical projects. 🤖✨