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HOME APPLIANCES CONTROL SYSTEM USING
GSM TECHNOLOGY
GUIDE : Mr.G.RAVIKANTH
V. VARUN (09RCIA0456)M.GEYANI (09RC1A0411)P.SHIVA (09RC1AO442)T.MALLIKARJUN(09RC1A0453)
LAQSHYA INSTITUTE OF TECHNOLOGY & SCIENCES
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INTRODUCTION :Now a day's every one prefers automated
control systems because of its Less Manual Operations More Accurate
Implementing an interfacing system to remotely control Home Appliances using the GSM Technology.
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Literature Survey
Telephone
RF
GSM
Previous Technologies For Controlling Home Appliances :
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History of the GSM Technology Mobile cellular systems introduced for commercial use
in the 1980s.In the beginnings of cellular systems, each country
developed its own system, and so - The equipment was limited to operate only within the
boundaries of each country. - The market was also limited. To overcome these limitations, the Global System for
Mobile communications (GSM) became in 1982.
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GSM Technology
GSM stands for Global System for Mobile communications Introduced in 1982 International roaming. Low mobile and base stations costs. High-quality speech
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GSM Technology
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GSM Radio Interface
Two frequency bands, of 25 Mhz for the GSM system:
The band 890-915 Mhz for the uplinkThe band 935-960 Mhz for the downlink
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MICRO CONTROLLER
AT89S51
POWER SUPPLY
LCD DISPLAY
(16 X 2 LINES)
MAX 232RELAY 1 BULB
RELAY 1 WATER PUMP
MOTOR DRIVER GATE
GSM
DC FAN
BLOCK DIAGRAM
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MICROCONTROLLER
• A Micro controller is called as “SYSTEM ON A CHIP” as it consists of
• A powerful CPU with memory, various I/O interfaces integrated on to a single silicon chip
• The main features are 4kbytes program memory 32 I/O lines Low power, high performance 8bit microcontroller
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8–bit CPU with registers A & B. 16-bit PC & DPTR 8- bit PSW & Stack Pointer Internal ROM of 0 to 4K Internal RAM of 128 bytes:Thirty –two input/output pins arranged as four 8-bit
ports:P0,P1,P2,P3Two 16-bit timer/counters: T0 and T1Full duplex serial data receiver/transmitterControl registersTwo external and three internal interrupts sources.
FEATURES OF AT89C51 MICROCONTROLLER
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2
MICROCONTROLLER PIN DESCRIPTION
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POWER SUPPLY
For supplying 5v DC power supply, we use the below circuit
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Provides compatibility among various different equipments Introduced by Electronic Industries Association (EIA).
MAX 232
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RS 232In RS232, A logic 1 is represented by -3 to -25V, While a 0 bit is +3 to +25V, Making -3 to +3 undefined. For this reason, to connect any RS232 to a
microcontroller system we must use voltage converters such as MAX232 to convert the TTL logic levels to the RS232 voltage levels, and vice versa
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Embedded Controller
RXD
TXD
TXD
RXD 2
3
5
GND
MAX 232
MAX 232
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16x2 Display Used for displaying
AlphabetsNumbersSpecial symbols
LCD
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TEXT MESSAGE
DESCRIPTION
1.
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TEXT MESSAGE
2.
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TEXT MESSAGE
3.
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TEXT MESSAGE
4.
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ADVANTAGES :
Highly sensitive. Taking measures to reduce the electricity bill. Large coverage ON/OFF from any distance. Can handle heavy loads up to 7A.
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APPLICATIONS:
Home appliance control. Hotel lights / fans control. Shops and showrooms. Industrial applications. Electronic applications for security.
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FUTURE SCOPE
This project can be further enhanced by placing sensors and providing feedback to user.
If any unauthorized person tries to enter into home, sensor will activate and GSM modem will pass this information to the owner of the house.
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Any Queries
?
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Thank you