Talking Smart Glass for the Blind

Introduction

There are multiple smart accessories such as smart glasses, smartwatches, etc. available in the market. But all of them are built for us. There is a significant lack of technology to aid the physically challenged. I wanted to build something that is useful for visually challenged people. So I designed low-cost smart glass that can be used to help the visually impaired.

This project uses a few ultrasonic distance sensors, an Arduino Pro Mini, an MP3 player module, and some vibration motors.

The circuit board used in this project is designed in the form of a spectacle, which can be worn by a visually impaired person. An Arduino mounted on the spectacle will detect the obstacle with the help of the sensors and notify the user through headphones and vibration motors.

Flash the Pro Mini

• Connect the Pro Mini to the computer using FTDI cable.
• Select proper COM port.
• Select 'Arduino Pro or Pro Mini.'
• Click upload

Make sure to flash Arduino before soldering it to PCB. Once all the components are soldered, it will be bit harder to connect the programming header.

Assembling the PCB

• Solder the components like Arduino, DF Player, Audio jack, Slide Switches to the PCB first.
• We can't directly solder the HC-SR04 module available from themarket. some modification needs to be done.

• Straighten the male header using pliers or de-solder the 90° headers and solder normal headers.

• Add electrical tape to tha back of HC-SR04 to avoid short circuit.
• Insert HC-SR04 to designated solder pads. hold the left and right HC-SR04 at an angle and apply solder.
• Solder rest of the components such as power supply cable, slide switches, vibration motors etc.

If You are making the project without the PCB, then please refer to the attached circuit diagram.

In the schematics, I accidentally swapped Pin 8 and 9. Sorry for the mistake,

Correct connection is

• Rx of DF Player => PIN 9 of Arduino.
• Tx of DF Player => Pin 8 of Arduino.

Do correct it if you are not using the PCB, I don't have the fritzing file with me anymore.

More details circuit reefer easyEDA project: here

Copying Audio Files to the SD card

Copy content of the Audio files folder to the root of the SD card.

Copy folders (01, 02, 03) itself, not its content.

This is my entry to PCBWAY PCB designing contest. If you like this project consider voting for my entry: https://www.pcbway.com/project/shareproject/Talking_Smart_Glass_For_Blind.html

EasyEDA project: https://easyeda.com/B45i/Blind_glass-c2decaaea6f84508a28f646ed3dcc5dc