Heat Gate Control Furnace

8/9/2019 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

Heat Gate Control Furnace

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