Swami schidanand polytecnic collage visnagar

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Swami schidanand polytecnic collage visnagar

• LIGHTING LOAD CONTROL USING GSM SYSTEM

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Lighting load control by mobile

• 
  
• 
  PRESENT BY
• 
  JAYDEEP PATEL
• 
  DHAVAL PATEL
• 
  GHANSHYAM PATEL
• Guided By -
  MEHUL PAT E HANSABEN PATEL
  DHIREN PATEL
• (PROF EE DEPT)

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INTRODUCTION-

• The DTMF based remote monitoring
  system consists of sensors for sensing the
  present parameters of the process or machine. The
  whole system can be installed at a distance place
  from where these data can be directly sent to the
  logging system. The data obtained is sent to
  doctors system by converting it into DTMF
  signals. The DTMF stands for dual tone multiple
  frequencies. The idea behind this project is
  generation of DTMF signal for sending data.
• In communication any digit may
  be transmitted in pulse mode or in DTMF
  mode. We are generating DTMF tones at transmitter
  end and decoding these tones at receiving end
  which can be used for transmitting the data from
  one end to another end.
• These signals are decoded at
  the receiving end and original data is recovered
  form it by the doctors.

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Dual-tone multi-frequency (DTMF)
signaling is used for telephone signaling over
the line in the voice-frequency bandto the call
switching center. The version of DTMF used
fortelephone tone dialing is known by the
trademarked term Touch-Tone (canceled March 13,
1984), and is standardized by ITU-T
Recommendation Q.23. Other multi-frequency
systems are used for signaling internal to the
telephone network. As a method of
in-band signaling, DTMF tones were also used by
cable television broadcasters to indicate the
start and stop times of local commercial
insertion points during station breaks for the
benefit of cable companies. Until better
out-of-band signaling equipment was developed in
the 1990s, fast, unacknowledged, and loud DTMF
tone sequences could be heard during the
commercial breaks of cable channels in the United
States and elsewhere
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BASIC BLOCK-

DTMF Decoder

Power supply
Microcontroller
LCD display
Device Control system
Different devices
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CIRCUIT DIAGRAM-
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COMPONET USED-

• Microcontroller (AT89C51)
• DTMF decoder 8870
• Over load relay 
• LCD display 
• transformer
• capacitors 
• resister 
• connecting wire

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Microcontroller
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Introduction to AT89C51 The AT89C51 is a CMOS
8-bit microcomputer with 4K bytes of Flash
programmable and erasable read only memory
(PEROM). The on-chip Flash allows the program
memory to be reprogrammed in-system or by a
ordinary nonvolatile memory programmer. Atmel
AT89C51 is a powerful microcomputer/microcontrolle
r (as they are used inter-changeably) which
provides a highly-flexible and cost-effective
solution to embedded control applications.many
Features of AT89C51 Compatible with MCS-51
Products 4K Bytes of In-System Reprogrammable
Flash Memory Endurance 1,000 Write/Erase
Cycles Fully Static Operation 0 Hz to 24 MHz
Three-Level Program Memory Lock 128 x 8-Bit
Internal RAM 32 Programmable I/O Lines
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DTMF decoder 8870
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Features Low Power Consumption Adjustable
Acquisition and Release Times Central Office
Quality and Performance Power-down and Inhibit
Modes (-02 only) Inexpensive 3.58 MHz Time
Base Single 5 Volt Power Supply Dial Tone
Suppression Applications Telephone switch
equipment Remote data entry Paging systems
Personal computers

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Over load relay 
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• A Relay Is An Electrically Operated Switch
• Many Relays Use An Electromagnet To Operate A
  Switching Mechanically.
• Relay Are Used where Necessary To Control A
  Circuit By A Low Power Signal.
• Many Types Of Relay
• 1) SPST
• 2) SPDT
• 3) DPST
• 4) DPDT
• 5) Contactor Relay
• 6) Solid State Relay
• 7) Buchholz Relay
• 8) Over Load Protection Relay

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LCD display 
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transformer 
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A Transformer is device there electrical energy
form one circuit to another A Transformer Basic
Principal is Two 1). Electromagntisim 2).
Electomagnetic induction A Transformer many
Type of losses 1).Hysteresis losses 2).Eddy
Currents 3).MagnetoStriction 4).Mechanical
losses 5).Stray losses
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capacitors 
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A Capecitor Is A Passive Two Terminal Electrical
Component. A Capecitor Used to 1)Energy
Storage an Electric Field. 2)power Factor
Correction. The Forms Of Practical Capacitors
vary Widely.
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resister 
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A Resistor Limit Current In a typical
Application. The Resistive Coating Is
Spiralled Away In An Automatic Machine Until The
Resistance Between The Two Ends Of The Road Is As
Possible To The Correct Value. A Thin Film
Carbon Is Deposited On To a Small Ceramic
Rod. Metal leads And End Caps Are Added. The
Resistor Is Covered With An Insulating Coating
And Finally Painted With Coloured Bands To
Indicate The Resistor Value.
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WORKING PRINCIPLE

• Here microcontroller is the heart of this
  project ,Firstly the power supply of 5v DC is
  very essential for this set up, this power
  supply trigger the microcontroller 8051,then
  8051 is directly connected with LCD device
  control, LCD gives the info regarding devices
  that can be operated by microcontroller 8051
  device control here acting as a switch with the
  help of relays .
• DTMF encoder sends the information in the form
  of frequency from the 2G
• hand set ,Then DTMF decoder decode the
  information in the form of frequency and this
  information fed to microcontroller pins.Finally
  microcontroller performs the relative operations.

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ADVANTAGES

• Here we are using 2G technology,2G provides
  video calling, video streaming ,video
  conferencing and other tremendous advantages.
• with the help of video streaming we can see the
  project setup as well operates the same.
• Security is another important parameter that is
  fully protected by microcontroller.