temperature sensor based ceiling fan control system
DESCRIPTION
ABOUT FAN(PPT)TRANSCRIPT
HOLY MARY INSTITUTE OF TECHNOLOGYBOGARAM(V), KEESARA (M), RANGAREDDY (Dist)- 501301
PROJECT SEMINAR ON
TEMPERATURE SENSOR BASED CEILING FAN CONTROL SYSTEM
SUBMITTED BY
S.VINAY REDDY (10QH1A0453)AMIT NITIN BONGALE (10QH1A0404)
M.ANAMIKA (10QH1A0405)P.SATISH REDDY (10QH1A0444)
Under the supervision of
Internal Guide Head of the Department
Mr.N.VEDA KUMAR M.Tech Prof. M.DEVAM RAJUB.E,M.TECH.(PH D)
(ASSISTANT PROFFESSOR) (PROF. & HOD of ECE)
ABSTRACT
The main aim of the project is to operate the fan using
SENSORS
Effective way of operating a fan is by using TEMPERATURE
SENSOR without the help of a regulator.
Here we use THERMISTOR (LM35) as a temperature sensor.
Contents Introduction
Block Diagram
Power Supply
Micro-controller AT89C51
LCD
Relay
DC Motor
Schematic Representation
Real Time Applications
Advantages & Disadvantages
Future Scope
Conclusion
INTRODUCTIONEMBEDDED SYSTEMS is a special-purpose system in which
the computer is completely encapsulated by or dedicated to the
device or system it controls.
This project ‘TEMPERATURE SENSOR BASED CEILING
FAN CONTROL SYSTEM’ mainly explains you about the use of
a fan with out the help of regulators.
The input devices we use here are temperature sensor, power
supply, analog-to-digital converter[ADC 0804].
The output devices connected to the micro-controller are LCD,
Relay & fan.
BLOCK DIAGRAM
Power Supply
Temperature Sensor
A
D
C
MicroController
AT89C51
FAN
L C D
Relay
POWER SUPPLY
Power supply internally consists of a step down transformer,
rectifier, filter & a voltage regulator
Step down Trans-former
Rectifier
FilterVoltage Regulator
230VAC
TEMPERATURE SENSOR Device that detects (senses)
changes in the ambient conditions or in
the state of another device or a system,
and conveys or records this information
in a certain manner.
LM35 is a precision IC
temperature sensor with its output
proportional to the temperature (in
oC).
It has three pins namely
Output,VCC & GND.
LM35
ANALOG-TO-DIGITAL CONVERTER [ADC]
ADC is short for Analog Digital
Converter, Sometimes called a A-D or A
to D Converter.
An ADC is a device that converts a
continuous analog signal to a multi-level
digital signal without altering its content.
The signals that are monitored are
sounds, movement, and temperature into
binary code for the PC.
MICRO-CONTROLLER(AT89C5 1)
PIN DESCRIPTION
BLOCK DIAGRAM OF 8051 µC
ALPHANUMERIC 16X2 LCD
16X2 LCD
A relay is used to isolate one electrical
circuit from another.
It allows a low current control circuit to
make or break an electrically isolated high
current circuit path.
The basic relay consists of a coil and a set
of contacts.
Relay is used as an electromagnetic
switch.
RELAY
Relay
FANHere in the place of a fan we actually use a AC motor
for a clockwise rotation with speed in accordance to the
temperature sensor.
Motor is a device that creates a motion, not an
engine. It usually refers to either an electrical
motor or an internal combustible engine.
SCHEMATIC REPRESENTATION
SOFTWARE
Here we are use KEIL micro vision 4 and PROTEUS
software for purpose of simulation of code.
Keil µvision 4
Proteus
KEIL µVision 4It is possible to create the source files in a text editor such as Notepad, run the Compiler on each C source file, specifying a list of controls, run the Assembler on each Assembler source file, specifying another list of controls, run either the Library Manager or Linker (again specifying a list of controls) and finally running the Object-HEX Converter to convert the Linker output file to an Intel Hex File. Once that has been completed the Hex File can be downloaded to the target hardware and debugged.
To build (compile, assemble, and link) an application in µVision4, you must:1 Select Project (forexample,166\EXAMPLES\XYZ\XYZ.uv4).2 Select Project - Rebuild all target files or Build target.3 µVision4 compiles, assembles, and links the files in your project.
PROTEUS
Proteus is software for microprocessor simulation, schematic capture, and printed circuit board (PCB) design.
ISIS Schematic Capture
PROSPICE Mixed mode SPICE simulation
ARES PCB Layout
VSM
System Benefits
It basically consists of :-
ADVANTAGES
The need for manual input through a remote device is
unnecessary as the sensor detects the temperature conditions
when switched on.
The size & redundancy for the whole machine is also
varyingly reduced which saves time and cost.
As the temperature sensor recognizes patterns of variations
and acts accordingly by the code imprinted on the micro-
c0ntroller, the overhead of the manual input is eliminated.
The major disadvantage lies in the case of a closed room.
In a closed room as the temperature rises with the increase in
fan speed HUMIDITY increases too. Here in this case, humidity
plays an important role.
An obsolete solution is to use a humidity sensors as well for
the control of humidity in the case of a closed room
DISADVANTAGES
Future scope
Controllers are essentially small, purpose-built
computers with input and output capabilities. These
controllers come in a range of sizes and capabilities to
control devices commonly found in buildings, and to
control sub-networks of controllers.
Inputs allow a controller to read temperatures,
humidity, pressure, current flow, air flow, and other
essential factors. The outputs allow the controller to
send command and control signals to slave devices,
and to other parts of the system. Inputs and outputs
can be either digital or analog.
Real-time Applications
CONCLUSIONThe Temperature sensor controlled DC fan is a prototype for a
machine to work in temperature variant conditions & without human
effort at all.
The theoretical implementation have been so far successfully
accomplished and hence the experimental part of the project work
lies ahead of us which will be completed in the allotted time with the
help of my co-partners.
Hence we thank Sir Veda Kumar who made us cross every
hurdle we have stepped to come all this way
We thank the HOD and Principal Sir to put faith and
provide us with such an opportunity Last but not the least we thank the audience my fellow students for their co-operation
WE INVITE ANY QUERIES AND SUGGESTIONS TO MAKE THIS PROJECT MORE EFFECTIVE