Major Project Presentation
On Touch Screen Control of Wheel Chair
Arya Institute of Engineering and
Raj Kumar Thakur (11EAIEC118)
Radhe Shyam Mandal(11EAIEC106)
Er. Vidhi Vart Chandroday
Under The Guidance Of
Er. Vidhi Vrat Chandroday
The main objective of this project is to
design a micro controller-based
wheelchair, the speed and direction of
which can be controlled from a touch
screen. The wheelchair moves by means
of a geared dc motor.
Micro controller ATMega32
1. 40 pins. Two for Power (pin no.10:
+5v, pin no. 11: ground), two for
oscillator (pin 12, 13), one for reset
(pin 9), three for providing
necessary power and reference
voltage to its internal ADC, and 32
(4×8) I/O port.
2. It has 32Kbytes of In System Self
programmable Flash program
memory, 1024 Bytes EEPROM,
2Kbytes Internal SRAM.
Write/Erase Cycles: 10,000 Flash /
3. It is a low-power, high-performance
CMOS 8-bit microcontroller.
Motor Driver L293D/L298
The current provided by the
MCU is of the order of 5ma
and that required by A motor
A motor driver IC like L293D
or L298 is used for providing
interface b/w MCU and motor
It which has two H-bridge (4
switches) drivers. Hence, each
IC can drive two motors. It
only acts as a switch . 6
Drivers are enabled in pairs, with drivers 1 and 2
being enabled by the Enable pin.
When an enable input is high (logic 1 or +5V), the
associated drivers are enabled and their outputs are
active and in phase with their inputs.
When the enable pin is low, the output is neither high
nor low (disconnected), irrespective of the input.
Direction of the motor is controlled by asserting one
of the inputs to motor to be high (logic 1) and the
Touch SensorTouch Sensor
A touch screen sensor is a clear glass panel with a touch
The sensor generally has an electrical current or signal going
through it and touching the screen causes a voltage or signal
The input function from touch screen is used to control
the directions of the motors fixed to the chair.
To drive the motors having high torque, a driver IC
L293D is attached.
The LCD acts as an output device to display the
function which is being performed by the
Public Access: Public Transportation Schedule / Status
Airport terminal passenger internet and email systems
automated travel and entertainment ticket.
Business Gas stations, Point of sales, Restaurants, Grocery
stores, Hospital and hotel directories (check-in, registration),
Banks and Financial Reporting, Bank cash advance and teller
machines, corporate presentation
Education: Assistive technology, Computer Aided
Instruction for Children, Edutainment, Professional training
and presentations, Employee orientations.
Entertainment: Interactive computer games, Casinos.
Government: Government voting facilities, Military control
system, scientific research lab..
Industry: Industrial Equipment and Instrument Control14
The Intelligent Vehicle for Physically and Mentally Disabled Persons
designed in this project has a lot of advantages, but can also be improved
Here the vehicle is controlled by touch panel. Another proposed method
is the controlling of the vehicle by the control of mind. By this a person
can control the motion of the same by just thinking itself. This vehicle
can be modelled in such a way that it can be easily turned into a semi
sleeper mode in order for the patient to feel more comfortable and
thereby reduce the continuous one mode sitting problem.
Other already invented methods in wheelchair can also be incorporated
with this. Like step climbing wheelchair and inter communication
between devices-which is just an upcoming project trying to be
implemented on road vehicles. The communication aid with these
wheelchairs will help the deaf and dumb to communicate with each
other’s too. These all are the (much more can be thought of) Future
works we can propose regarding this vehicle. 15
Today, a larger share of population is PC literate,
yet the touchscreen has become adopted by
computer users of all abilities because it is simple,
fast, and innovative. Today’s product designer or
system integrator would be served to remember
yesterday’s technology adoption challenges and
flexibly adopt new technological approaches if
they wish to solve today’s application challenges.