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Blind Man Assistance System

Enhancing Safety Through Proximity Detection and SMS Alerts

@CircuitsBazaar

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Introduction

  • This project aims to aid visually impaired individuals by detecting nearby obstacles.
  • An ultrasonic sensor monitors proximity, and an SMS alert is sent if an object is detected within 12 inches.

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Components Used

  • • Arduino Nano
  • • Ultrasonic Sensor
  • • Buzzer
  • • GSM Module
  • • Power Supply and Wiring

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Circuit Diagram

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Arduino Nano

  • • Compact microcontroller based on ATmega328P
  • • 14 digital I/O pins, 8 analog inputs
  • • Operating voltage: 5V, Clock speed: 16 MHz
  • • Controls sensors and processes data efficiently

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Ultrasonic Sensor

  • • Detects objects by sending and receiving ultrasonic waves
  • • Measures distance based on time delay of returning waves
  • • Critical for detecting obstacles within specified range
  • • Operates between 12-45 inches with precision

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Buzzer

  • • Audio alert mechanism to notify the user
  • • Activates when an object is detected within 45 to 12 inches
  • • Ensures immediate awareness of nearby obstacles

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GSM Module

  • • Sends SMS alerts when an object is detected within 12 inches
  • • Essential for notifying caretakers of potential risks
  • • Operates on mobile networks for wide-range communication

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Power Supply

  • • Provides necessary power for all components
  • • Typically 5V DC supply for Arduino Nano and modules
  • • Ensures stability and consistent operation

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Software Used

  • • Arduino IDE for programming the microcontroller
  • • Libraries: SoftwareSerial for GSM communication
  • • Simple, efficient coding for streamlined operation

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Working Principle

  • 1. The ultrasonic sensor detects objects within a 45-inch range.
  • 2. If an object is between 45 and 12 inches, the buzzer alerts the user.
  • 3. If an object is closer than 12 inches, an SMS alert is sent via the GSM module.

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Advantages

  • • Real-time obstacle detection for enhanced safety
  • • Simple and affordable components
  • • Provides immediate alert through buzzer and SMS
  • • Compact design suitable for wearable technology

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Disadvantages

  • • Limited to short-range detection (45 inches max)
  • • GSM network dependency for SMS alerts
  • • May require frequent charging if battery-powered

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Applications

  • • Assistive device for visually impaired individuals
  • • Can be integrated with wearable technology
  • • Useful for alerting caretakers about potential obstacles

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Future Scope

  • • Integrate AI for object recognition and smarter alerts
  • • Improve detection range and accuracy with advanced sensors
  • • Add GPS functionality for precise location tracking