94. Mobile Password Activation

7/30/2019 94. Mobile Password Activation

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PROJECT

ON

MOBILE PASSWORDACTIVATION SYSTEM FOR

INDUSTRIAL APPLICATIONS


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CONTENTS

AimIntroductionPlatform used

Block DiagramMicrocontroller sectionWorkingAdvantagesApplicationsConclusion


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INTRODUCTION This system is based on mobile controlled device on and off ,a person

can switch on and off the devices using mobile technology .Through

mobile we can switch the device through a distant place .Now here is no

need to go up to switch board and switching the devices on and off, one

can easily perform this switching from anywhere. This system is

controlled by microcontroller .

DTMF signaling is used for telephone signaling over the line in the

voice frequency band to the call switching center. The version of DTMF

used for telephone dialing is known as touch tone. DTMF assigns aspecific frequency (consisting of two separate tones) to each key s that it

can easily be identified by the electronic circuit. The signal generated by

the DTMF encoder is the direct algebric submission, in real time of the

amplitudes of two sine(cosine) waves of different frequencies, i.e.

,pressing 5 will send a tone made by adding 1336hz and 770hz to the

other end of the mobile.


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AIM OF THE PROJECT

The aim of the project is to investigate a cost effective

solution that will provide switching of devices

remotely. The motivation is to facilitate the users toautomate their homes having ubiquitous access. The

system provides availability due to development of a

low cost system.

The system is using mobile for making the work ofswitching devices very easier .Through cell phone and

the microcontroller we are aiming for successful

completion of this project.


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PLATFORM USED

SOFTWARE REQUIREMENTS

Batronix Prog Studio for programming of Microcontroller

Orcad for Circuit Designing

Pads for PCB designing

HARDWARE REQUIREMENTS

Microcontroller 89c51/89s52

Crystal Oscillator

Resistor

Diode

Capacitor

Transistor

Connectors

Relay

Cell phone

Function numeric display Voltage regulator


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BLOCKDIAGRAM

SUPPLY

SECTION

MICRO CONTROLLER

89C51/89s52

ELECTRICALMACHINE

MOBILE UNIT


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POWER SUPPLY SECTION

RLMT Connector--- It is a connector used to connect the step downtransformer to the bridge rectifier.

Bridge Rectifier --- It is a full wave rectifier used to convert ac into dc ,9-15v ac made by transformer is converted into dc with the help ofrectifier.

Capacitor: -----It is an electrolytic capacitor of rating 1000M/35V used toremove the ripples. Capacitor is the component used to pass the acand block the dc.

Regulator: ----LM7805 is used to give a fixed 5v regulated supply.

Capacitor: -----It is again an electrolytic capacitor 10M/65v used for

filtering to give pure dc.Capacitor: ----- It is an ceramic capacitor used to remove the spikes

generated when frequency is high(spikes).

So the output of supply section is 5v regulated dc.


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MICROCONTROLLER SECTION

+5v supply: This +5v supply is required for the controller to get startwhich is provided from the power supply section.

Crystal Oscillator: A crystal oscillator of 12 MHz is connected at pinno.19,x1 and pin no.18,x2 to generate the frequency for thecontroller. The crystal oscillator works on piezoelectric effect.The

clock generated is used to determine the processing speed of thecontroller. Two capacitors are also connected one end with theoscillator while the other end is connected with the ground. As it isrecommended in the book to connect two ceramic capacitor of 20pf40pf to stabilize the clock generated.

Reset section: It consists of an rc network consisting of 10M/35V

capacitor and one resistance of 1k. This section is used to reset thecontroller connected at pin no.9 of AT89c51.


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MICROCONTROLLER UNITMICROCONTROLLER AT89s52

Features

Compatible with MCS-51 Products

8K Bytes of In-System Re programmable Flash Memory

Endurance: 1,000 Write/Erase Cycles

Fully Static Operation: 0 Hz to 24 MHz

Three-level Program Memory Lock

256 x 8-bit Internal RAM

32 Programmable I/O Lines

Three 16-bit Timer/Counters Eight Interrupt Sources

Programmable Serial Channel

Low-power Idle and Power-down Modes


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WORKING OF PROJECT

In this project a call is made to the mobile which is communicating

with the microcontroller serially ,phone which is connected to the

microcontroller will receive the call after some time automatically

then the user dial a specific password to switching the machine.when the user dial that password receiver of the mobile unit

connected to circuit communicate it with the microcontroller .Since

today we use the DTMF technology for communication each

number on keypad has its own frequency in our circuit we will use a

DTMF receiver for converting the received frequencies by the

mobile unit into digital signal and apply it to the pins of the

microcontroller, microcontroller will read that execute the

instructions stored in it ,and switch the machine connected at its

output pin . Its also on the industrial motor.


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ADVANTAGES

Improved operational efficiencies.

Ensures safety of workers.

Improve industry goodwill in the market.

Improves companys profit.


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CONCLUSION

The project mobile controlled device on and off make

the switching of device remotely . From this project we

conclude using mobile technology our work of switchingbecome very easy .through this project we understand

the basics of microcontroller and the concept of mobile

communication.


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Documents

94. Mobile Password Activation