Ultrasonic Navigation For The Blind

Ultrasonic Blind Walking Stick
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This project is built to aid the blind so that they may walk easily in urban areas and avoid obstacles using special detection sensors . This system uses a microcontroller coupled with an output buzzer to alert the concerned. The system is fitted with an infrared sensor and also three ultrasonic sensors. The system guides and alerts the blind person of walking route and also alerts others about the blind person at night through led’s fitted with it.

The ultrasonic sensors fitted with the system provides obstacle data to the blind person through voice message so that he/she may avoid them. The LDR circuit coupled with LED lets other people and vehicles aware about the blind person in the dark. A microcontroller does all the work of detecting ultrasonic signals and sending back respective messages to the blind person.Thus the system provides complete guidance and protection to a blind person under various circumstances.

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Hardware Specifications

  • 8051 series Microcontroller
  • Micro-switch
  • Light Sensor
  • Buzzer
  • Ultrasonic sensor
  • RF Rx-Tx

Software Specifications

  • Keil µVision IDE
  • MC Programming Language: Embedded C


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