Download - Heat Gate Control Furnace
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PRESENT TION
ON
HE T ND G TE CONTROL
OF FURN CE
Group Members:
Sindhuja Panigrahi
Sunit Kumar Samal
Asit Kumar Pradhan
Rahul Behera
Aparajita Bakshi
GUIDED BY :
Mr.K.Madhava RaoAsst Professor
HOD(EEE)
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CONTENTS
Introduction
Use of Triac and Diac
Use of Atmega16 microcontroller
Block diagram
Circuit diagram of heat control of a furnace
Inductor design
LM35 heat sensor
Circuit diagram of gate control of a furnace
Interfacings of LCD and RELAY with microcontroller
Flowchart of the logic
Programs
power supply circuit
Components used for hardware implementation
Conclusion
References
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INTRODUCTION
Why we need heat control of any system?
How to control the heat?
Why gate control is required for us?
How to control the gate of a furnace?
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USE OF TRIAC
1. The triac is a three-terminal ac switch that is triggered into
conduction when a low-energy signal is applied to its gateterminal.
2. SCRs are unidirectional (one-way) current devices, making them
useful for controlling DC only. If two SCRs are joined in back-to-
back parallel fashion just like two Shockley diodes were joined
together to form a DIAC, we have a new device known as the
TRIAC.
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USE OF DIAC
1. A diac is an important member of the thyrister family and is usually
employed for triggering triac.
2. A diac is a two-electrode bidirectional avalanche diode which can be
switched from off-state to the on-state for either polarity of the
applied voltage.
USE OF ATmega16 1. The ATmega16A is a low-power CMOS 8-bit microcontroller
based on the AVR enhanced RISC architecture. By executing
powerful instructions in a single clock cycle, the ATmega16A
achieves throughputs approaching 1 MIPS per MHz allowing thesystem designer to optimize power consumption versus processing
speed.
2. ATmega16 consist of 40 no.of pins.
3. It consist of four ports such as port A , port B, port C and port D
respectively.
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BLOCK DIAGRAM
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HEAT CONTROL CIRCUIT DIAGRAM`
FIG-2
http://localhost/var/www/apps/conversion/tmp/scratch_8/heat%20control%20circuit.docx
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INDUCTOR DESIGN
An Inductor also choke, coil, or reactor is a passive two-terminalelectrical component that stores energy in its magnetic field. Here we
have designed a ferrite cored inductor because for higher frequencies,
inductors are made with cores of ferrite. Ferrite is a ceramic
ferromagnetic material that is nonconductive, so eddy currents cannotflow within it.
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I NTERFACINGS
WITH
MICROCONTROLLER
LCD
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1. LCD (Liquid Crystal Display) screen is an electronic display
module and find a wide range of applications.
2. A 16x2 LCD means it can display 16 characters per line and there
are 2 such lines
3. LCDs are economical; easily programmable; have no limitation of
displaying special & even custom characters (unlike in seven
segments), animations and so on.
LCD
RELAYA relay is an electrically operated switch . Relays are used where it is
necessary to control a circuit by a low-power signal (with complete
electrical isolation between control and controlled circuits)
.
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LCD INTERFACING
1. LCD is using to show the operation of gates as well it will showsthe temperature of the furnace by sensing through the LM35 heat
sensor. This is interfaced with the port A of the microcontroller.
2. It is interfacing with port-D of the microcontroller and control pins
are connected with the pins of port B.RELAY INTERFACING
1. Relays are using to switching the high voltage devices.
2. They are operated by normally 12V dc supply
3. So Darlington IC(ULN 2803) is used to switching the Relays
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The ULN2803A is a high-voltage, high-current Darlington transistor
array. The device consists of eight npn Darlington pairs.
ULN2803-DARLINGTON IC
Pin configuration
Logic diagram
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Circuit diagram for gate control of the furnace
http://localhost/var/www/apps/conversion/tmp/scratch_8/Pin%20configuration.docx
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FLOWCHART OF THELOGIC
http://localhost/var/www/apps/conversion/tmp/scratch_8/flow%20chart.docxhttp://localhost/var/www/apps/conversion/tmp/scratch_8/flow%20chart.docxhttp://localhost/var/www/apps/conversion/tmp/scratch_8/flow%20chart.docxhttp://localhost/var/www/apps/conversion/tmp/scratch_8/flow%20chart.docx
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PROGRAM
http://localhost/var/www/apps/conversion/tmp/scratch_8/program.docxhttp://localhost/var/www/apps/conversion/tmp/scratch_8/program.docx
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POWER SUPPLY CIRCUIT
FIG-6
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HARDWARE COMPONENTS
http://localhost/var/www/apps/conversion/tmp/scratch_8/Hardware%20components.docxhttp://localhost/var/www/apps/conversion/tmp/scratch_8/Hardware%20components.docx
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MODEL OF THE PROJECT
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CONCLUSIONS
In this project we are controlling the heat and gate of a
furnace by using triac and Microcontroller in a better way
and automatically with required variation of time.
In our minor project we had done the simulation of heat
control circuit.
In major project we had implemented the heat and gate
control of the furnace as hardware successfully
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1. Dr. P.S Bimbhra, ”Power electronics, Khanna Publishers”, 1st
Edition.
2. Dr. M.H Rashid, ”Power electronic circuits, devices &
application”, 2nd Edition, P.H Publication.
3. Baker, Bonnie, “Temperature Sensing Technologies”,AN679,
Microchip Technology Inc., 1998.“Practical Temperature
Measurements”, OMEGA CATALOG, pg Z-11.4. Robert L. Boylestad, Louis Nashelsky, Electronic Devices and
Circuit Theory, 7th Edition, India: Prentice Hall, 2003.
5. MacKenzie Scott. The 8051 Microcontroller, Prentice Hall.
3rd. Ed., 19996. Yeralan and Ahluwalia. Programming and Interfacing the
8051 Microcontroller,Addison-Wesley. 1995.
REFERENCES
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TH NK YOU