Micro controller based speaking system for deaf and dumb is designed to alert the attendants regarding the basic needs of them. It is a microcontroller based device, which announces the needs predefined into the system through simple touch input.   Microcontroller is the heart of the device. It stores the data of the needs of the person. So that it can make use of the data stored whenever the person uses the device. This device helps the deaf and dumb people to announce their requirements. By this the person who is near can understand their need and help them. This saves the time to understand each other and ease in communication.   Touch screen based devices can be easily reachable to the common man due its simpler operation, and at the same time it challenges the designers of the device. These touch screen sensors can be used as a replacement of the existing switches in home which produces sparks and also results in fire accidents in few situations. Considering the advantages of touch screen sensors an advanced automation system was developed to control the appliances in the house.   This device is designed to provide with a greater advantage producing voice based announcement for the user i.e. the user gets the voice which pronounces his need as and when it is required.  

The main features of this project are:  

1. User-friendly interaction with the user.
2. Highly sensitive.
3. Reliable for dumb people.
4. Easy to operate.

This project provides learning’s on the following advancements:  

1. Interfacing the microcontroller with the haptic sensor.
2. Voice generation circuit.
3. Embedded ‘C’ programming.
4. PCB design.

  The major building blocks of this project are:  

1. Regulated Power Supply.
2. Microcontroller
3. Haptic sensor.
4. Voice Recording Module
5. Crystal oscillator
6. Reset
7. LED indicators

 

Block Diagram:

video: