Seminar Report on Heat Sensitive Device Controller(Jaga Final)

8/9/2019 Seminar Report on Heat Sensitive Device Controller(Jaga Final)

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Introduction

Heat sensor with fan cooling circuit describes the use of operationalamplifier and a very common diode in 4148 used in such way that it cansense the variation in the ambient or environment if the temperatureincreases the predefined value set by the per-set then it starts fan forcooling unless the temperature is again well below the value this low

circuit is very useful for automatic controlling any application.Interest has been growing in integrated circuit for cooling the speed ofcooling fan in personal computer and other electronics equipment. Compactelectrical fans are cheap and have been used for cooling electronicsequipment for more than half a century. However in recent year the

technology using these fans has evolved significant. !his article willdescribe how and why this evolution has ta"en place and will suggest someuseful approaches for the design.


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Parts List:R1 = 560 ohmR2, R9 = 100K R3, R8 = 10K R4, R7 = 1K R5 = 470 ohmR6 = 100 ohm, 2watt, wire-woundQ1 = 2N2907 (N !159"# $ow noi%eQ2 = "&!521 (N !184#' 1 = 741, o)-am)*ed1 = *!+, red+1, +2, +3 = 1N4148, %i na$ diode+4 = 1N4004, enera$ )ur)o%e diode

1 = 100K, trimmer )ot1 = 2.2u/, 25 , e$e tro$ ti2 = 47u/, 25 , e$e tro$ ti


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Description:

he ontro$$er u%e% one or more ordinar %i$i on diode% a% a%en%or, and u%e% a hea) o)-am) a% the am)$i ier. ' de%i ned thi%

ir uit to u%e 12 om)uter an%, a% the%e are now er ea% to

et hea)$ . he%e an% t )i a$$ draw a out 200m whenrunnin , %o a %ma$$ )ower tran%i%tor wi$$ e ine a% the %wit h. 'u%ed a +140 (1 , 6.5 #, ut a$mo%t an thin ou ha e tohand wi$$ wor :u%t a% we$$.


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Circuit Diagram For Power Supply


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Circuit Diagram For The Heat Sensitive Device Controller


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About Circuit Elements:

ran%i%tor; hi% i% e e$ement in ir uit. 't i% u%ed a% %wit h. he im)ortant )ro)ert o thi% ran%i%tor '%, thi% tran%i%tor i e out )ut rom

o$$e tor on$ when it% a%e o$ta e i% at %ome < e )otentia$ than it % emitter.

Re%i%tor;

re%i%tor i% a two-termina$ e$e troni om)onent that )rodu e% ao$ta e a ro%% it% termina$% that i% )ro)ortiona$ to the e$e tri urrent throu hit in a ordan e with >hm?% $aw; ! "#


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Bridge Rectifer: Bridge Rectifer is actually a bridge o Diodes1N4007.This is used to convert 1 ! "# $co%ing ro%

Trans or%er& to 1 ! D# 'hich is su((lied to circuit.

)*Ds: )ight *%itting Diodes+ ,laced in circuit+ to sho' level o 'aterin Tan-. These diodes are o(erated at 1. !


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he a)a itor?% un tion i% to %tore e$e tri it , or e$e tri a$ ener .

he a)a itor i% on%tru ted with two e$e trode )$ate% a in ea h other, ut %e)arated an in%u$ator.

hen + o$ta e i% a))$ied to the a)a itor, an electric charge i% %toredon ea h e$e trode.

hi$e the a)a itor i% har in u), urrent $ow%.

he urrent wi$$ %to) $owin when the a)a itor ha% u$$ har ed.


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Description :

The 1N414/ and 1N444/ are high s(eed s'itching diodesabricated in (lanar technology+ and enca(sulated inher%etically sealed leaded glass 2D 7 $D2 3 & (ac-ages.

'itching diodes are a single ( n diode in a discrete (ac-age." s'itching diode (rovides the sa%e unctionality as a s'itch. thas high resistance belo' the s(ecifed a((lied voltage si%ilar

to an o(en s'itch+ 'hereas above that voltage it changes in asudden 'ay to the lo' resistance o a closed s'itch. 'itchingdiodes are used in devices such as ring %odulation.


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The sche%atic o an auto%atic cooler an or audio a%(lifers isgiven here. The circuit auto%atically s'itch 2N the cooler an'henever the te%(erature o the heat sin- e5ceeds a (reset level.

This circuit 'ill save a lot o energy because the cooler an 'ill be266 'hen the a%(lifer is running on lo' volu%e. "t lo' volu%e lessheat 'ill be dissi(ated and it 'ill not trigger the cooler an 2N.

+ /an ;


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+!@ R' '>N ;

The ) 741 series are general (ur(ose o(erational a%(lifers 'hicheature i%(roved (er or%ance over industry standards li-e the

) 708. They are direct+ (lug in re(lace%ents or the 708#+ ) 01+#1438and 74/ in %ost a((lications.

The a%(lifers o9er %any eatures 'hich %a-e their a((licationnearly ool(roo : overload (rotection on the in(ut and out(ut+ nolatch u( 'hen the co%%on %ode range is e5ceeded+ as 'ell as

reedo% ro%oscillations.


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$i ht-emittin diode (*!+# i% an e$e troni $i ht %our e.

*!+% are u%ed a% indi ator $am)% in man ind% o e$e troni % andin rea%in $ or $i htin .

*!+% are a%ed on the %emi ondu tor diode.

he $on er $ead i% the node %ide and the %hort one i% the athode %ide.


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tran%i%tor i% a %emi ondu tor de i e u%ed to am)$i and %wit he$e troni %i na$% and e$e tri a$ )ower.

't i% om)o%ed o %emi ondu tor materia$ with at $ea%t three termina$% oronne tion to an eAterna$ ir uit.


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AD A$TA%ES:&AD A$TA%ES:&

hi% )ro:e t an e u%ed in Bome.

hi% )ro:e t an e u%ed in 'ndu%tr .

hi% wi$$ he$) in %a in the ener C e$e tri it .

o monitor the en ironment% that i% not om orta $e, or )o%%i $e,or human% to monitor, e%)e ia$$ or eAtended )eriod% o time.

re ent% wa%te o ener when it % not hot enou h or a an to e

needed.

o a%%i%t )eo)$e who are di%a $ed to ad:u%t the an %)eedautomati a$$ .


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D"SAD A$TA%ES:&D"SAD A$TA%ES:&

't an on$ e maintained te hni a$ )er%on. hu%, it e ome%di i u$t to e maintained.

+ue to tem)erature ariation, a ter %ometime% it% e i ien made rea%e.


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F'T'#E SC(PE:&F'T'#E SC(PE:&

e an monitor more )arameter% $i e humidit , $i ht and at the%ame time ontro$ them.

e an %end thi% data to a remote $o ation u%in mo i$e or internet.

e an draw ra)h% o ariation% in the%e )arameter% u%inom)uter.

hen tem)erature eA eed% the $imit, a a$$ wi$$ e dia$ed to there%)e ti e i en num er an automati +ia$er % %tem.


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hi% )ro:e t i% om)$ete D e%ta $i%hed an automati runnin an thato)erate% with a %en%or, u%in u$$ hardware de%i n. he tem)erature%en%or i% onne ted to aria $e re%i%tor whi h wi$$ et out the out)ut%i na$%. hi% wi$$ determine the an automati a$$ in rea%in orde rea%in in %)eed a ordin to the %)eed $e e$ o a norma$ an thatare %et to di erent tem)erature ran e o a room. he tem)erature%en%or wi$$ t )i a$$ %en%e the tem)erature D the aria $e re%i%tor %etin that tem)erature ran e. 'n a%e ertain re%i%tan e% wi$$ e %eta ordin to the mea%ured ran e o tem)erature. Ben e the + an

wa% onne ted or throu h out the heat D %et the tem)erature norma$.

C($CL'S"($C($CL'S"($


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#EFE#E$CES#EFE#E$CES

www.ma"ingthings.com#telecom#autofan

www.daiwah".com

www.analog.com#analogdialouge

www.national.com#appinfo#temperaturesensors

www.pdf.com#heatsensorwithfancooling

www.wi"ipedia.com#electroniccomponents


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Seminar Report on Heat Sensitive Device Controller(Jaga Final)

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