In this paper, we design device to help the blind people to navigate the environment without asking anyone. The device based on digital compass, the raw data for location coordinate where the blind people stands is detect by digital compass, processing these data by PIC microcontroller to calculate real coordinate related with current position, then translate it to specific voice message which are presorted in voice recorder, the blind person hears voice message through the headset. Our design aims are to produce device that is more cheap by using little number of components and easy to use so that the blind person not need to do any thing just hearing the voice message.   The controlling device of the whole system is a Microcontroller. Microcontroller acts an intermediate between input and output modules and acts accordingly on the output modules from the input received as in the way it is programmed. Here, the Microcontroller get input from digital compass movement (i.e. information given by user by changing direction of compass). The controller checks the information from digital compass and compares with predefined details. This system capable of detecting the obstacle while travelling the blind person and gives the audible alerts through buzzer. This system gives the voice alerts heading towards the direction of the blind person while travelling. The Microcontroller is programmed in Embedded C language.  

The main objectives of the project are:  

1. Design a voice based Digital compass.
2. It is very use full to the blind persons for navigation.
3. Obstacle detection and alerting system.

      This project provides us with the learning’s on the following aspects:  

1. Interfacing voice module with Microcontroller.
2. Interfacing HMC8832 module with Microcontroller.
3. Interfacing Ultrasonic Sensor with Microcontroller.
4. Embedded C programming.
5. PCB Design and development

  The major building blocks of this project are:  

1. Regulated Power Supply.
2. PIC Microcontroller.
3. Digital compass.
4. Voice module.
5. HC-SR04 Ultrasonic Sensor.
6. Buzzer.
7. Reset.
8. Crystal oscillator.
9. LED indicators.

  Software’s used:  

1. PIC-C compiler for Embedded C programming.
2. PIC kit 2 programmer for dumping code into Micro controller.
3.  Express SCH for Circuit design.

   

Block Diagram:

video: