Blind Person's Assistant

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Project developed by Aliaksei_Petsiuk

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Abstract

The given project is a part of Open Source Appropriate Technologies assignment, and it is designed to support visually-impaired people.

As per World Health Organization, there are about 300 million visually-impaired people in the world, 40 millions of them are totally blind. Scientists and engineers are working on systems which would be able to improve the quality of lives of people with the lost vision. A number of modern projects and achievements in this field has been listed in the Reference section.


Bill of Materials

The full list of materials used for the project is provided in the table below.

Component Bracelet Case Cover Arduino Nano Sensor Buzzed Laser 3V Button Battery M3x20 Screws M3x6 Screws Wires
Image Blnd asst bracelet apetsiuk.jpg Blnd asst case apetsiuk.jpg Blnd asst cover apetsiuk.jpg Blnd asst arduino2.jpg Blnd asst usound sensor.jpg Blnd asst buzzer.jpg Blnd asst laser.jpg Blnd asst button.jpg Blnd asst battery.jpg Blnd asst m3x20 screw.jpg Blnd asst m3x6 screw.jpg Blnd asst wires.jpg
Quantity 1 1 1 1 1 1 1 1 2 4 4 10
Cost/item $ 0.20 $ 0.20 $ 0.20 $ 3.00 $ 1.50 $ 0.30 $ 0.40 $ 0.10 $ 0.50 $ 0.02 $ 0.02 $ 0.01

Total cost is $ 5.00.

  • 3D source files could be downloaded from here:
  • Code for arduino is available at:
  • For arduino programming you may need the free open source Arduino IDE which could be downloaded from: https://www.arduino.cc/en/Main/Software

Tools needed for fabrication of the OSAT

  1. MOST Delta RepRap or similar RepRap 3-D printer
  2. Plastic Filament
  3. Soldering Iron
  4. Solder
  5. Screwdriver
  6. Hexagon Key
  7. Breadboard
  8. Paper Knife
  9. Tweezers
  10. Wires Stripper

Skills and Knowledge Necessary to Make the OSAT

All skills you need are at the basic level:

  • 3D printing
  • 3D Design
  • Electronics
  • Programming

Technical Specifications and Assembly Instructions

  1. Provide directions for print/assembly - be detailed enough in your “how to” to ensure that someone could construct the device from your description. Consider the elegance of IKEA like instructions.
  2. Include print time estimate
  3. Include assembly time estimate
  4. Including drawings or pictures of the device at stage of assembly at minimum. (http://www.appropedia.org/Special:Upload)

Common Problems and Solutions

  • Solder all the wires with the components being in the place of the approximate final position. It may be complicated to bend soldered wires.

Cost savings

  • If your solution is not a low cost one then it is not really appropriate.
  1. Estimate your costs
  2. Find a commercial equivalent
  3. Calculate $ savings and % savings

Benefited Internet Communities

  • Name and add links to at least 5 using single brackets around [url name]

References

[1] [2] [3]

  1. Wafa Elmannai and Khaled Elleithy. Sensor-Based Assistive Devices for Visually-Impaired People: Current Status, Challenges, and Future Directions. US National Library of Medicine, National Institutes of Health, Sensors (Basel). 2017 March 2017. Available: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5375851/
  2. Antonio Pereira, et al. Blind Guide: An Ultrasound Sensor-based Body Area Network for Guiding Blind People. Procedia Computer Science, v. 67, 2015, pp. 403-408. Available: https://www.sciencedirect.com/science/article/pii/S1877050915031312
  3. Rohit Agarwal, et al. Low cost ultrasonic smart glasses for blind. 2017 8th IEEE Annual Information Technology, Electronics and Mobile Communication Conference (IEMCON). Available: https://ieeexplore.ieee.org/document/8117194
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