eee 226 review 1.pptx

8/10/2019 EEE 226 Review 1.pptx

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EEE 304:

POWER ELECTRONICSPBL

REMOTE CONTROLLED

FAN REGULATOR


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TEAM MEMBERS

S.NO NAME REG. NO.

1. A.LEELA KIRAN 12BEE1020

2. A.VIJAY KOUSHAL 12BEE1024

3. Y.V.S ANIL

12BEE1025

4. R. ROHIT AMALAN

12BEE1053

5. V.KOUSHIK

12BEE1113


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INTRODUCTION

The aim of our project is to design andconstruct a remote controlled fan regulator.

This circuit allows total control over the

equipment without having to move around.

The frequency of remote used is typically

around

36 KHz.

The remote control device sends an infra-redbeam, which is received by the infra-red

sensor on the regulator thereby affecting the

speed of the fan or intensity of light.


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BLOCK DIAGRAM


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INFRARED RECIEVER

MODULE The infrared rays transmitted by the remote

control are received by IR Receiver.

The component used here is capable of

receiving signals up to 38 KHz.


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MONOSTABLE

MULTIVIBRATOR Monostable Multivibrator is used for getting an

accurate pulse.

The trigger to this is the signals from receiver

module.

The output of Monostable Multivibrator (IC1)is usedto delay the clock pulse of decade counter.


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DECADE COUNTER

Decade counter is Mod-10 counter.

The count is incremented with each clock

pulse.


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TRANSFORMER

The 230 V AC is step down to 12V by theTransformer .


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REGULATOR SECTION

The rectified output (12V) of the

Transformer is regulated to 9V by the

Regulator.

This 9V is supplied to the whole circuit.


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OPTOCOUPLER

An Opto coupler is used to transmit eitheranalog or digital information from one

voltage potential to another while

maintaining isolation of potentials. It is used

for low voltages.

The output of the Opto coupler is used to

trigger the Monostable Multivibrator.


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OPTOISOLATOR

An Opto isolator is used to transmit eitheranalog or digital information from one

voltage potential to another while

maintaining isolation of the potentials. Its

operating voltage is higher than that of an

Opto coupler.

The output of the Opto isolator is used to

drive the Triac.


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TRIAC

A Triac changes its state when its gatereceives a current pulse.

It is a Thyristor with a firing angle of nearly

450

. This firing angle determines the speed of

the fan.


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ABOUT THE CIRCUIT

The circuit consists of a step down Transformer

(12V-0-12V).

The diodes(D1-D6) and the capacitor(C9)

constitutes the Rectifier & Filter section.

7809 is a 9V Regulator.

TSOP1738 is the infrared sensor.

Zener Diode regulates the voltage across the

sensor.

IC1 & IC3 are NE555 ICs which are wired as

Monostable Multivibrators.

IC2 is a Decade Counter.

The diodes(D7-D11) & resistors(R5-R9) along with

the Capacitor C5 controls the pulse-width of IC2.


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The Transistor(BC548) along with the

Resistors R10 & R11 acts as a switch.

MCT2E is an Opto coupler. MOC3021 is an Opto isolator.

A Snubber Network consisting of a resistor &

capacitor (R13 & C7) regulates the rate ofchange of voltage across the Triac.

The Triac BT136 regulates the speed of the

fan with the variations in its firing angle.


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CIRCUIT DIAGRAM


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WORKING

Infrared receiver module TSOP1738 is usedto receive the infrared signal transmitted by

remote control.

The circuit is powered by regulated 9V.

The AC mains is stepped down and

rectified.

Pulses from the IR receiver module trigger

the timer NE555 (IC1).

IC1 is wired as a Monostable Multivibrator to

delay the clock given to decade counter-

cum-driver IC CD4017 (IC2).


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Combination of one of the resistors R5

through R9 and capacitor C5 controls the

pulse width.

NE555 timer (IC3) is wired as a Monostable

Multivibrator.

MCT2E (IC5) is wired as a zero-crossingdetector that supplies trigger pulses to

Monostable Multivibrator IC3.

MOC3021 (IC4) drives Triac BT136.

The variations in the firing angle affects the

voltage and thus the speed of the fan is

varied.


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APPLICATIONS

Remote controlled Fan Regulator is used to

control the speed of fan from our bed or

couch.

The same circuit finds its use to control theIntensity of light at various levels.

This circuit also finds it use for switching

ON and OFF of any electronic circuit.


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ADVANTAGES

This circuit is simple to use and

efficient.

It can be assembled with ease. It is cheap and hence very economic.

It is small in size.


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CONCLUSION

The speed of fan & intensity of light can be

controlled in various levels from off position

to maximum intensity possible.

So it finds its use as night lamp by keepingthe intensity of lamp in low level.

The circuit also finds its use for switching

ON and OFF of any electronic circuitry.

Our normal T.V. remote can be used for this

purpose.


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REFERENCES

www.howstuffworks.com

Linear Integrated circuitsGaykwad

Electronic Devices and CircuitsJ.

B.Gupta

www.electronicsforyou.com


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THANK

YOU

eee 226 review 1.pptx

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