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Presented by:Riyanka Dixit 1SJ07EC068

Pushpashree A 1SJ07EC069

Sarveshwari R 1SJ07EC088

Shabana Begum 1SJO7EC089

Under the guidance of

Mr.M.Nagendra Kumar Asst Professor, Dept of E&C

SJCIT

Department of E&C,SJCIT



AIMTo design a micro controller based visual

alarm system to invoke positive response

from a nurse just by hand movement

using accelerometer sensors from a

patients room.




BLOCK DIAGRAM

accelerometerSensor

ADC MicrocontrollerP89V51RD2

Dip switch

ZigBee

Relay

Relay

Fan

BulbBuzzer

MicrocontrollerP89V51RD2

AlphanumericLCD

buzzer

ZigBee

DCadaptor

Power supply 5v,12,DC

TRANSMITTER

RECEIVER



Features of Accelerometer Sensorsy3 axis sensing

ySmall low profile package

(4mmX4mmX1.45mm)

y

10,000g shock survival

yExcellent temperature stability




Applications of Accelerometer

sensor

yMotion and tilt sensing applications

yMobile devices

yGaming systems

y Health devices and sports devices




MICROCONTROLLER y Heart of the project

y 8051 based Philips P89V51RD2 microcontroller.

y From NxP

y Controls whole system

y X2 mode option.

y The flash program memory supports both parallel

programming and in serial ISP.




Block diagram




FEATURES

y 80C51 CPU with 5V operating voltage from 0 to 40 MHzy 64 kB of on-chip flash user code memory with ISP and IAP.

y SPI and enhanced UART.

y Four 8-bit I/O ports with three high-current port 1 pins.

y

Three 16-bit timers/counters.y Programmable watchdog timer.

y Eight interrupt sources with four priority levels.

y Second DPTR register

y

Low EMI mode (ALE inhibit)y TTL- and CMOS-compatible logic levels

y Brownout detection

y Low power modesy Power-down mode with external interrupt wake-up

y Idle mode Department of E&C,SJCIT



ADC0808y ADC0809 is an 8-bit analog to digital converter

y The reference voltage is 5V.

y 2 Channels are used out of 8 channels.

y Successive approximation is the conversion

technique.

y The 8-channel multiplexer can directly access anyof 8-single-ended analog signals.




ZIGBEEy XBee-PRO ZB RF module that we use , consists of ZigBee firmware

loaded onto XBee S2 and S2B hardware.y These modules are designed to operate within the ZigBee protocol

and support the unique needs of low-cost, low-power wireless sensor

networks.

y The modules require minimal power and provide reliable delivery of

data between remote devices and operate within the ISM 2.4 GHz

frequency band .

SPECIFICATIONS:

�Indoor/Urban: up to 90 m

�Outdoor line-of-sight: up to 2 miles (3200 m)

�Transmit Power: 63mW (18dBm)

�Receiver Sensitivity: -102 dBmDepartment of E&C,SJCIT



RF MODULE OPERATION

Through its serial port, the module can communicate with any logic and voltage compatible UART; or through a level translator to any serial device (forexample: through a RS-232 or USB interface board)




Continued

Data enters the module UART through the DIN (pin 3) as anasynchronous serial signal. The signal should idle high when no data is being transmitted.




20x4 line Alphanumeric LCD




y Thin, flat electronic visual display.

y Uses the light modulating properties of liquid crystals

y LCD primarily consists of some liquid crystal material

between them of two glass plates.

y Many LCDs are ruminative, they use only atmospherelight to illuminate the display.

y Used in calculators to a full color LCD television.




SOFTWARESy Embedded C

y Keil Compiler

y Flash Magic




ADVANTAGESy Economical

y Thin, f lexible, robust

y Simple one piece constructiony Operates in a large temperature range

y Provides greater accuracy than traditionpotentiometer

y Able to withstand exposure to moisture in harshenvironment




LIMITATIONS

y Flex sensors are sensitive to small bends.

y The result of this arrangement is that the output voltage increases with increasing deflection.

y

Cannot be applicable to patients who are notconscious




Transmitter




Receiver




REFERENCES

y OP-AMPS AND LINEAR INTEGRATED CIRCUITS.y THE 8051 MICROCONTROLLER,ARCHITECTURE, PROGRAMMING AND

APPLICATIONS.ROBERT L. BOYLESTAD & LOUIS NASHELSKY.

y ELECTRONIC DEVICES AND CIRCUIT THEORY.y THE 8051 MICROCONTROLLER KENNETH AYALA,3RD EDITION.2].y MUHAMED ALI MAZIDI & JANICE GILLISPIE MAZIDI, PEARSON

EDUCATION, 2003.y EMBEDDED C MICHAEL J. PONT, PEARSON EDUCATION, 2002.y BOGART, THEODORE F,ELECTRONIC DEVICES AND CIRCUITS,

FOURTH EDITION.

Websites:

y http://www.keil.com/support/man/docs/gs/gs_applications.htm .y http://www.8051.com/codelib.phtmly www.nxp.comy www.keil.com




THANKYOU


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