the bladeless fan

8/18/2019 The Bladeless Fan

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The

Bladeles

s Fan


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Project Introduction

The temperature controlled fancircuit will automatically

control the speed of fanaccording to thetemperature.

A temperature sensor isused to sense thetemperature.

The speed of fan

increases with the


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BLOCK DIAGRAM


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Explanation of block diagram

Temperature SensorBlock

Ampl!er Block"

The temperaturesensed by using LM 3. The output voltage ofLM 3 varies in linerproportion with thetemperature. The

sensitivity of LM 3 is!" m#$"C. %or ! "Coutput of LM3 is !"m#. %or !" "C output ofLM3 is !"" m#.

&utput signal frommicro'controller()C! is wea* so wehave to amplify that

signal. Ampli+er bloc*ampli+es the signalfor driving the +nalcontrol element i.e.

output device. %orampli+cation Transistor ,C - isused.


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ADC Block"Mcro#controller$oard "

ADC means analo% tod%tal con&erter' The

output o( s%nalcondtonn% s n theanalo% (orm'

But Mcrocontrollerre)ures nput n d%tal

(orm (or ths purpose*e ha&e to use ADC'The re(erence &olta%es +, -' The resolutono( ADC s ./ m-'

It s a lo*#po*er0 h%h#per(ormance CMOS 1#$t

mcrocomputer *th 2K $3teso( Flash 4ro%ramma$le and5rasa$le Read Onl3 Memor345ROM6' The de&ce smanu(actured usn% Atmel7sh%h#denst3 non&olatle

memor3 technolo%3 and scompat$le *th the MCS#,8'

B3 com$nn% a &ersatle 1#$tC49 *th Flash on a monolthcchp0 t pro&des a h%hl3:e;$le and cost e


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Output Block" Dspla3 Block"

/n this pro0ect we are

using %A1 as outputdevice. /f temperaturelies in the speci+edrange correspondingto the relays then %anwill rotate at the

preset speed . /n this pro0ect we are

using LCD display todisplay the ctemperature.


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W orking of the circuit


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W hat is relay?

2sually a relay is used in acircuit as a magnetic switchto turn on a second circuit.

A relay is an

electromagnetic switchwhich is activated when asmall current is passedthrough its coil.

The interesting fact is that

this small current is capableof turning on a secondarycircuit which wor*s onmuch larger current.


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Relay code

#include


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6d)antage and 2uture

*e)elopm ent This will help in saving the energy $

electricity.

4e can monitor more parameters li*ehumidity light and at the same time .

4e can send this data to a remote

location using mobile or internet


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T=A>K ?O9@@@Group Mlnd 4ra$hakar

8$382ec/26>'Bha&3a 8$382ec/226-shnu 4rasad KL8$382ec/.6

the bladeless fan

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