2. 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)
3. 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 doctor’s 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.
4. 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
9. 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/microcontroller (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
11. 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
13. 13
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
16. 16
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
18. 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.
20. 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.
21. 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.
22. 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.
