Car parking Project Vacant Slot Monitor | Smart car Parking

Car parking Project Vacant Slot Monitor | Smart car Parking

Overview & Purpose

The project presents a smart parking system built using an Arduino Uno that monitors and displays available parking slots and controls an entrance gate automatically. By using sensors and a servo, it optimizes parking operations—minimizing time spent searching for space and reducing manpower requirements

Components Required

Arduino Uno: Main controller

• Arduino Uno: Main controller

IR sensors (typically 2 for the demo): Detect vehicle presence by reflecting IR beams

• IR sensors (typically 2 for the demo): Detect vehicle presence by reflecting IR beams

Servo motor: Acts as a barrier that opens or closes based on availability

• Servo motor: Acts as a barrier that opens or closes based on availability

16×2 LCD with I²C module: Displays “slots available” count, welcome messages, or “Parking Full” alerts

16×2 LCD with I²C module: Displays “slots available” count, welcome messages, or “Parking Full” alerts

Jumper wires, breadboard, power cables: For circuit assembly

• Jumper wires, breadboard, power cables: For circuit assembly
• Circuit & Wiring

Power connections: 5 V and GND from the Arduino supply the IR sensors, servo, and LCD.

• Power connections: 5 V and GND from the Arduino supply the IR sensors, servo, and LCD.

Signal wiring:

IR sensor outputs → digital pins 4 and 7

• IR sensor outputs → digital pins 4 and 7

Servo signal → digital pin 9

• Servo signal → digital pin 9

I²C LCD → SDA/A4 and SCL/A5 on the Uno

• I²C LCD → SDA/A4 and SCL/A5 on the Uno
• Signal wiring:IR sensor outputs → digital pins 4 and 7Servo signal → digital pin 9I²C LCD → SDA/A4 and SCL/A5 on the Uno

The tutorial provides detailed diagrams for reliable wiring.

• The tutorial provides detailed diagrams for reliable wiring.

Code Logic & Workflow

Initialization (setup())

Initialize LCD via I²C and turn on the backlight

• Initialize LCD via I²C and turn on the backlight

Configure IR pins as inputs

• Configure IR pins as inputs

Attach and position the servo (barrier closed)

• Attach and position the servo (barrier closed)

Display a welcome splash or initial slot count

• Display a welcome splash or initial slot count
• Initialization (setup())Initialize LCD via I²C and turn on the backlightConfigure IR pins as inputsAttach and position the servo (barrier closed)Display a welcome splash or initial slot count
• Main Loop (loop())

Read both IR sensors

• Read both IR sensors

Use flags to ignore repeated triggers from the same car

• Use flags to ignore repeated triggers from the same car

Vehicle Entry (IR1 triggered && slots available):

Decrement the slot count

• Decrement the slot count

Open the barrier via servo

• Open the barrier via servo

Update LCD (e.g., “Slot Left: X”)

• Update LCD (e.g., “Slot Left: X”)

If no slots remain, display “Parking Full”

• If no slots remain, display “Parking Full”
• Vehicle Entry (IR1 triggered && slots available):Decrement the slot countOpen the barrier via servoUpdate LCD (e.g., “Slot Left: X”)If no slots remain, display “Parking Full”

Vehicle Exit (IR2 triggered):

Increment slot count

• Increment slot count

Open barrier, update display accordingly

Open barrier, update display accordingly

• Vehicle Exit (IR2 triggered):Increment slot countOpen barrier, update display accordingly

After both the entry and exit sequence, the barrier is closed again

• After both the entry and exit sequence, the barrier is closed again

LCD is continuously refreshed with status updates

• LCD is continuously refreshed with status updates
• Main Loop (loop())Read both IR sensorsUse flags to ignore repeated triggers from the same carVehicle Entry (IR1 triggered && slots available):Decrement the slot countOpen the barrier via servoUpdate LCD (e.g., “Slot Left: X”)If no slots remain, display “Parking Full”Vehicle Exit (IR2 triggered):Increment slot countOpen barrier, update display accordingly After both the entry and exit sequence, the barrier is closed againLCD is continuously refreshed with status updates

How the System Works

On detecting a vehicle at the entrance sensor (IR1), the system checks slot availability. If slots remain:

The barrier opens, allowing entry

• The barrier opens, allowing entry

Slot count is decremented and displayed

• Slot count is decremented and displayed
• On detecting a vehicle at the entrance sensor (IR1), the system checks slot availability. If slots remain:The barrier opens, allowing entrySlot count is decremented and displayed

If the lot is full, the barrier stays closed and shows a “Full” message

• If the lot is full, the barrier stays closed and shows a “Full” message

When a vehicle triggers the exit sensor (IR2), the barrier opens again, and the slot count increases accordingly

When a vehicle triggers the exit sensor (IR2), the barrier opens again, and the slot count increases accordingly

Scalability & Enhancements

More slots: Add additional IR sensors and expand the code’s arrays

• More slots: Add additional IR sensors and expand the code’s arrays

Barrier tuning: Adjust servo angles and delays for smoother operation

• Barrier tuning: Adjust servo angles and delays for smoother operation

Display improvements: Upgrade to larger screens or add LED indicators

• Display improvements: Upgrade to larger screens or add LED indicators

IoT integration: Send real-time slot data to web dashboards or apps

• IoT integration: Send real-time slot data to web dashboards or apps

Advanced detection: Use ultrasonic sensors or RFID modules for reliability

• Advanced detection: Use ultrasonic sensors or RFID modules for reliability

Educational & Practical Value

This project is an excellent educational tool for learning:

Sensor interfacing (IR detection)

• Sensor interfacing (IR detection)

Actuator control (servo mechanics)

• Actuator control (servo mechanics)

Display output (I²C LCD handling)

• Display output (I²C LCD handling)

State management via flags and counters

• State management via flags and counters

It can be deployed as a prototype in small-scale parking zones, classroom demos, or foundational research in automotive automation.

Summary

Techatronic’s smart parking project offers a clear, modular, and expandable solution for automated parking management using basic electronics. With easy-to-source components and straightforward wiring and code, it’s ideal for beginners and intermediate hobbyists. The system smartly tracks slot availability, manages an entry barrier, and displays real-time info—all driven by an Arduino Uno.

Would you like assistance adapting this to use an Arduino Mega for additional slots or adding features like remote monitoring or RFID-based access control? Just let me know!

Sources

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Overview & PurposeThe project presents a smart parking system built using an Arduino Uno that monitors and displays available parking slots and controls an entrance gate automatically. By using sensors and a servo, it optimizes parking operations—minimizing time spent searching for space and reducing manpower requirements Arduino Uno: Main controllerIR sensors (typically 2 for the demo): Detect vehicle presence by reflecting IR beams Servo motor: Acts as a barrier that opens or closes based on availability16×2 LCD with I²C module: Displays “slots available” count, welcome messages, or “Parking Full” alerts Jumper wires, breadboard, power cables: For circuit assembly Circuit & WiringPower connections: 5 V and GND from the Arduino supply the IR sensors, servo, and LCD.Signal wiring:IR sensor outputs → digital pins 4 and 7Servo signal → digital pin 9I²C LCD → SDA/A4 and SCL/A5 on the Uno

The tutorial provides detailed diagrams for reliable wiring. Code Logic & WorkflowInitialization (setup())Initialize LCD via I²C and turn on the backlightConfigure IR pins as inputsAttach and position the servo (barrier closed)Display a welcome splash or initial slot count

Main Loop (loop())Read both IR sensorsUse flags to ignore repeated triggers from the same carVehicle Entry (IR1 triggered && slots available):Decrement the slot countOpen the barrier via servoUpdate LCD (e.g., “Slot Left: X”)If no slots remain, display “Parking Full”Vehicle Exit (IR2 triggered):Increment slot countOpen barrier, update display accordinglyAfter both the entry and exit sequence, the barrier is closed againLCD is continuously refreshed with status updates

How the System WorksOn detecting a vehicle at the entrance sensor (IR1), the system checks slot availability. If slots remain:The barrier opens, allowing entrySlot count is decremented and displayedIf the lot is full, the barrier stays closed and shows a “Full” messageWhen a vehicle triggers the exit sensor (IR2), the barrier opens again, and the slot count increases accordingly Scalability & EnhancementsMore slots: Add additional IR sensors and expand the code’s arraysBarrier tuning: Adjust servo angles and delays for smoother operationDisplay improvements: Upgrade to larger screens or add LED indicatorsIoT integration: Send real-time slot data to web dashboards or appsAdvanced detection: Use ultrasonic sensors or RFID modules for reliability

Educational & Practical ValueThis project is an excellent educational tool for learning:Sensor interfacing (IR detection)Actuator control (servo mechanics)Display output (I²C LCD handling)State management via flags and countersIt can be deployed as a prototype in small-scale parking zones, classroom demos, or foundational research in automotive automation. SummaryTechatronic’s smart parking project offers a clear, modular, and expandable solution for automated parking management using basic electronics. With easy-to-source components and straightforward wiring and code, it’s ideal for beginners and intermediate hobbyists. The system smartly tracks slot availability, manages an entry barrier, and displays real-time info—all driven by an Arduino Uno.Would you like assistance adapting this to use an Arduino Mega for additional slots or adding features like remote monitoring or RFID-based access control? Just let me know!