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1. BY
N.DHANALAKSHMI(E.C.E)
S.I.T

2.  An embedded system is a combination of
computer hardware and software, and
perhaps additional mechanical or other parts,
designed to perform a specific function.
A good example is the Microwave oven.

3. Agenda
 Introduction
 History, APPLICATIONS
 Market is Here!
What is EMBEDDED SYSTEM

4.  An embedded system is a special-purpose
computer system designed to perform one or
a few dedicated functions, often with real-
time computing constraints. It is usually
embedded as part of a complete device
including hardware and mechanical parts. In
contrast, a general-purpose computer, such
as a personal computer, can do many
different tasks depending on programming.
Embedded system control many of the
common devices that we use today

5.  In the earliest years of computers in 1930 –
40s, computers were sometimes dedicated to
a single purpose task

7.  Embedded Systems has witnessed
tremendous growth in the last one decade.
Almost all the fast developing sectors like
automobile, aeronautics, space, rail, mobile
communications, and electronic payment
solutions have witnessed increased use of
embedded technologies.

8.  Air conditioner
 ATM machine
 Battery charger
 Digital camera
 DVD player
 Fax machine
 Home security system
 Mobile phone
 Modem

9.  • Rocket & satellite control
 • Energy production control
 • Telephone switches
• • Air Traffic Control
 • GSM(Global System for Mobile)

10.  Introduction on GSM
 In recent years, vehicle thefts are increasing
at an alarming rate around the world. People
have started to use the theft control systems
installed in their vehicles.
 Low cost vehicle theft control scheme using
an inbuilt microcontroller.

12.  Microcontroller
 The AT89C51 is a low-power, high
performance CMOS 8-bit microcontroller with
4K bytes of flash programmable & erasable
read only memory (PEROM).
 By combining a versatile 8-bit CPU with flash
on a monolithic chip, the Atmel AT89C51 is a
powerful microcomputer which provides a
highly-flexible and cost effective solution to
many embedded control applications.

15.  The LCD is connected to Port2 (P2.0 to P2.7)
of the microcontroller. It is used to
display.(either error or accepted).
Variabmessagele resistor connected to Pin3
of LCD, is used to control the brightness of
LCD.
 A liquid crystal display is a low cost, low
power device capable of displaying text and
images.

17.  Reactive and real-
time
 Reactive:
Continually reacts
to external events
 Real-time: Must
compute certain
results in real-time