94. mobile password activation
TRANSCRIPT
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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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