Visual Pictionary for Visually Handicapped

Student: Gan Theng Kiong

Supervisor: Dr Shum Ping

UROP E311

Introduction

Visual Pictionary (VP) is an original and innovative device to assist the visually handicapped students understand graphs and figures electronically.

Objective

•to create a platform for Visually Handicapped to learn graphs and figures

•to increase awareness on how engineers can design gizmos to improve the life-style of the disabled

•to encourage innovation in research and development for practical application

VP Overall Structure

VPd – Virtual Pictionary Decoding software

VPs – Virtual Pictionary System

VPs

Controller

Buffer Solenoids Matrix

Intel 8051

It is easy to use and implement

It has sufficient built in RAM/ROM, I/O ports

It can interface with RS-232 serial port

MC 1489 quad line receiver

It is used to match the transmission line EIA-232D standard to the predefined TTL level for the microcontroller.

ULN2003A Darlington Arrays

ULN2003A are high voltage, high current darlington arrays each containing seven open collector darlington pairs with common emitters. Each channel can provide sufficient current to energize the solenoid.

Solenoids Matrix

The solenoid will be raised to represent the features of the figures and graphs

Program Demonstration