Base

CHAPTER 4 RESULTS AND DISCUSSION

4.6 Base

The base for the model of clotheslines system was constructed from perspex which had 200mm in width and 445mm in length. The base acted as the support to system since the shaft of the motor can not be used as the poles to support the overall system.

Figure 21: Automated Clothesline System Base

4. 7 Overall system

Figure 22: Automated Clothesline System

All the individual part of the system was assembled and integrated. When the sensor system detected the water, an output of 5 V has been given to PIC microcontroller. With this output, the microcontroller have triggered the motor system to move forward and pulled the track back to sheltered place by sending an output of 5V. But, the motor movement was not exactly as the expected result since the motor do not stop at the specified placed. It was believed that due to the distance of the poles were too short caused the time delay introduced cannot stop the motor at the exact place. Some tests or experiments have been conducted to determine the right time delay for the microcontroller. The data of the experiments that were conducted was shown in Table 4.

Table4: The relation between motor supply, time delays and location displacement.

Motor supply (V) Time delay (s) Displacement from exact location (em)

5 10 100

5 7 79

5 5 60

5 1 35

2

10 65

2

7

48

2

5 37

2

1 31

The table shown that the time for the motor movement stopped was longer than expected. But as the motor supply power has been reduced to 2V, the displacements also have been reduced. Therefore, for this model, as long as the motor supply can reduced to the minimum requirement of the motor, the distance of displacement can be reduced significant! y.

CHAPTERS

CONCLUSION AND RECOMMENDATION

5.1 Conclusion

The objective of the project was to develop an automated clothesline system.

The system made use of sensors, motor and microcontroller to enhance the process of clothes drying. After the system was integrated and constructed, it is concluded that this project is viable that it can detect rain and put the clothes to sheltered place hand-free.

5.2 Recommendation

For study, it is recommended that the motor can be operated in two directions (forward-reverse actions) so that the system can either put the clothes to the safe place when it is raining or put the clothes to the unsheltered area to dry the clothes back. Therefore, another sensor (light sensor, heat sensor, etc) are needed for this requirement. It was also recommended that limit switch were used to replace the time delay function so that the motor could be stopped at the requirement time and place.

REFERENCES

[1] http://www.wikipedia.org/wiki/Clothesline August 19,2007 [2] http://www.clotheslineshop.com/Merchant2 August 14,2007

[3] LM78LXX Series Datasheet, April2006, National Semiconductor Corporation.

[4] http://www.physicsforums.com/archive.html September 19,2007 [5] http://www.wikipedia!wiki/PIC microcontroller August 16,2007 [6] Ibrahim, Dogan 2006, "30 projects using PICbasic and PICbasis PRO"

[7] PIC16F87X Datasheet, 1999 Microchip Technology Inc.

[8] http://en.wikipedia.org/wiki/PIC microcontroller

[9] CytronSK40A, PIC Microcontroller Start-Up Kit, August 2006, Cytron Enterprises

[10] Wikipedia, "H-bridge" January 15,2008 http:/ /en. wikipedia.org/wiki/H bridge

[11] 1293 Datasheet, Dual Full Bridge Driver, January 2000, STMicroelectronics [12] Wikipedia "DC motor", September 14,2007

http:/ I en. wikipedia.org/wiki/Motor controller

APPENDICES

APPENDIX A

LM78LXX DATASHEET

d

;'in//QIItJI (,"'~'.\'em i emu/ m: lor

LM78LXX Series

3-Terminal Positive Regulators General Description

Tl'rl- U.t7el:O:X ~ri£-.S. ·:1 lhre-.:-le-rn~nalj:<~~li~~ r~uk\lc•m is

·h4ilablot wilh ~·;e-rH fbo~d outplt ·.olt.fl~ ma~ir.? lh:m u;..:.h.• in a ~id£. r<~rr;p. of appioolt:n~ . .,./Don use.:laa.e z.:.n.:-r

-:i·:d~:ir~tor •Jombinelion re-~t~tamen~ lte Lt.'f1;9LX"X usu·

.all~· r~dL$ in an e-ff~clio'-: oulpll imp=darm .. impro:•,,..menl ·:f t\<.'0 oJ>:Ieor~ of magri ll.de, irf.II·:.Y.e-r qli,..~nt wrro;.nl Tho»e- r.;-}~l~t:·li .Jan pro•,id~& ~=~ r.n card r~la6on, efrrinilting lhe- r.btritY6•:n prt.bi-Hns enocillled ·,l,tjth ~rr;~ ... poi11 r.:gu·

lelkfl. Tt~ ·,d~g~ il'i<lilt!t~e-alf:.y.· lf'r.:. LM76LXX 1·:·~ u6Eod in lo-;ic sy.s.te-rn!., iMirum~:-nlalim, HiFi, nrt:loltr.:.r 60it:ls19/eo -=l,..clr·:nic o:q.JiJ)II'I:f!t

Tho: Lt.17'8L)(J:: is ^e~ailaUe in Itt:-plaslt) TO-i'2 (Z:• pM~&;P..

lhE' pies!~) 80.8 \r.t~ ~cM!g"' lind a oJtip a.z.=.:J j:fll(ktt!;f.'

(e..Bunp lrli<.)f·:· srwr USirrJ Nett:ilel'e. mt}l·:· Sr.tD !»d..age- IE'o:hrr!log~. '\"Jilh .tdoe-q~ heo.al ~nl:irr;~ lhoo tE'g.Jii!b:lr ctm r.blinor 100rn'-. oot~t C1Jrre-rt. r;un~nllimi6rr;~ it irr~h.de-d lo lfnif lht P"'"" ^.:~IJ:ut C1Jn-tnt ro .a st~l'l' \'411JE-. Safe. .ar~

~·~~~ctt:n tor IM ^·!~IJ:ut trrmsi.st·:u, is J!f(t'~jd:oj lo limit intoe-r·

Connection Diagrams

$!HI Pl.a~tio IMi iN.artt:ow B.:dy)

''"'0'

^{~u;; •;11:•} 11: ^{" l} I

''"

,; ^{1 ' ~.~ ~II} 11:

e-Bump micro SJom

Top View (Bump Ski-eo Down;

1'181 po:•....,..-dssipi!ij•:n. If in~rnel f':: .... ·er de&t;.aijon l~)Oif'r!G t·:<:~ high lor 1M he-ill sinhing pr•:•>'iled, lhoo "*mRll ~hrl:do'Ml cire:..rit talo:et o•,E<r J!fE'~,.n6rrJ lh~ IC ffom ·:•l'+rhHUI'(I.

Features

• Lr.178L•:6 n micro $1[• p;tl~<l~

• 6ulput ·~oil&;.:-t.ole-r.anC>!'t ol ::!:5"' ~we-t ltri l>!'rnpe-rature

r.-.;.

• 6ulpul ·~Uift31'11 ol 1.:0m,t..

• lnle-mal tt.:-rrnoll ·=·~-.:.t~Oild pr·:·...,}Hon

" 6ulputlrilre~lor ~ 1:-~IN prO:•Ito}lion

• lnle-m<~l ~l'r:rt ci1«1it QJtre-rt limit

• .:. . .,ai)lltle- in pia$ It} TC<·~~ end FIM~c .Srj~i k•..,. J!tO!iiEo P'tcf..ag-M

111 N:· e-xt...rF'Iill .;.:rnporenls

111 6l.rtpul·,·ol!l'f1i'O of s.o•.,., 6.:::'.1, e.:o:'.', 'fi.•:OV, 1:2'.f, 1os··:

• So:.<- . .r•JI·1112 for mt~rO:• SMO oonsf:kurHoro.

(TO-i:Zi Pl,u11_, P.ack~9t-(~

BottomVI-tw mioro SMD ~t.arklng OritntA11on

WWW,ROii:rnale:om

Absolute Maximum Ratings (Nol• (• ·~-er.!ltirq Ju!l':.tion T.:tl~O:OJ(IIutoJo

11 Mil ita ryiAe-ro,paoe ip~ifitd doJovi·~n are- rtquiM-d, ^{SCI-a. T0~1} .; .. : t·:· 1:.$ c

pi-tau oom.aot th• thti onal Se-n~iocnduc-tr:.r Sa IM Offiee-f rr;.,:;,.;. SMt• -.:1•) ·~ to 85 ··:

Dlitriblltol'i for availability and ~p~e:ifi~tions. S:~d~ring lnlr.•rn\91~:ff

P:•~r [•it.sij:o~~tion •:~kt.:< '5:• lnli'rrrally lin\ite-:1 lr,fr.ared •:f ·~on~'>i-':.lion •:::.•:• !M'c.:• :1?0.:

lnpul'·loll&!f.' 3'5'/ -~·.'e·t~ &tld=-rin;~ ( 10 '*").:• ^:i·w-·~ rJ..-oiid lin~r Sroro~~'1e T-=tn~.,..Jelm.;. -6'5'(: l:· t1!5o:o"i::

ESD .Suseo:optibiit~· (~t·te-:2:r ^11i'/

LM78LXX Electrical Characteristics Lin)il6. in ~larPji!tr•:ll)pe-la-:.o: ar.:-f.;., T J := ~s-,.~. Bold typ>9faoe- eppliti ove-r o·c tv 12:5 C tol' S0.-5 111nd T0-92 pack.age-1!., and -.4•) C V.. e.; C for mic:ro $tJIO par.:kage-. Linib .ar ... gltarfln- b:oe--J by pr·:o:lwtion te-sting •:f .;;on.;.lalion t::-Jtniqo~s u~.-,;J &lftl)jer·:l Stati&liJal OU$Iit~· •):ntr·:~ (&:!(:! m=-ltr:t;l~ ltll~$& olh~r·

'>\-;~ .SJ*Jirli-1: 1::. = o~r:rn..r.., •~1 = •:0.-~IF, C.:.: 0.1~1F.

LM78L05

IJniM.s •)~n-.i~ sp.:.Jifi.:-:1, './,N = 10'./

symool ~aram~te-r Condition'S; Min Typ Max Unit'S;

.... c Output '•ioltap:- _7V:.:.''.' 4.8

•

^s.~

11":.:."1:!:0V

1m . .!..:.:.l.:o:.:. 4<:m:.. ^4.?.; s.:.; v

(~k-t-;.3:•

m.:..:.:. l.:o:.:. 7>:m:._

(~kes:• 4.73 '5.:!5

.i'' •·:o ^Lirn-R~Ql•ation 7V:.:.V1N:.:.'2!:0V ^1e 7$

sv:.;, v," :.;,"1:!:;•: 10 ;.

Load f:te-tulation ^m'.'

~...-.j tm.,.:.:.I.::J0::.1•Zrn.:..

•o

⁶⁰

tm.~:.:.I.::JO:.:. 4r:mo\ ^; ;o

I< Ouj.;o:a.;.:.nt •::unent •• ^;

.llo Oli~:St.1o:flt Current Ct.arY;e a··:;;. v,";;.'l:!:;v 1.0

"''

tm.:..:.;, 1.::. :;.4-:m.:..

.. ,

" ^Output li:t~ )kUilg~ 1 =10Hz to t•:o ~Hz

'" (N•:W 4! 40 ~· ^....

~v,,. J:tippk-J:t~jEo~tion 1-= 1~0 Hz

a·.,.·::.v,":.:.,.;.v ·~ ^tl2 .;e

ilVQu-

I PI<. Pe(lk Output CllrfE-nl 1-l•:O

,,.

.:l.Vo .A.•,-er419~ Ct.l!J:(It '.'·:ltllg~ Tempo>:· b= em:..

-Q.tiS Ill'.'/"(:

At

'in~ (Mi~l Minimum Val..a ollnpW '.f·:Uap:- _{tl.7 7 'I}

t=l~qlired lo 1.\aintlllin Ur.:-R~g\Jati•:n

·~ Thi!'rrr)aJ t=lesi&lilnre-

23).~ cw

•:a-Bw'np n~tJIO:• SM[•}

LM78L62AC

IJrr~ •:•IMN-i@ ~""}ilied, ',•;N = 12'j

Symbol Param~tE-r Conditloni P.r'lin Typ rJJu Unili

v.::JO Oulplll'loltfi!F ^{'S.i-'5 6.~ .;.,4:5}

S.5V:.;, V1N:i.'J::i•.'

1m.,._;.;.l:o:;...-:m"'. 5.9

(N•:W s:•

{>,.;

v

tmA:.:. 1.::.:;. 7>:m~ .;,9 6.5

(N·:es:•

Typical Applications

Flxe-:1 Ou1pUI R~gulat·;.r

f---< ... - :UTIIl,IT

"'T~roa rtl'lt ~l::lort! IO.:il~ m:r;. hiln Y rrom tJt poNM !IfF'/ m;r, -~ ·!Iota -1.:· r.lhe ~ .. m:t~ >3\JtJdonlll~ tO£Jo.

Adjus.t.al:h· Output Rt-gulator

'.'o..tr • s•.· ~ ,s-.•,,u •':' ^Fr.!

5'..','A1"' j I:;.I~G r~ .. i1"l'llf'l!k:• • (tR1 .l';i::•Fi1[ tL, o-IIJ.ol7aO~:•

l:ur • t'.'O'.n-'F\1:•

•'=

~''o • Um.r. O\'IOtll'lill an:ll~d Chil19Z

~~1011::1 bl'll:llll'l'l.

-Ht=~~nt•:l1 •

CutMnt R~gulatc.r

, ... -r-Ll --:;;:_ ... ,---...' ... ::---,. J ...

'1"-

(11i.ol

L----·-

^IJ•.nv•

SV •. 5C•C.n~A Re-gulator with Short Cite:uit Protf.3ti.:.n

.. .,::lpiGrut: rnpw1tt~ I'IPFI• rtjttl&n 111'1:1 r31iiii!IN r.;.~~·­

IMd fi;.1Jbii:G: O..S:O:. 'J~ 11 ~ :!Sr:m,:r.pu~Y,1f'IION • S>:m~

APPENDIXB

PIC16F87X DATASHEET

MICROCHIP

PIC16F87X

28!40-()in 8-Bit CMOS FLASH 1Iierocoutrollers

Device--s lnctud~d in this Cata Sh~et:

P1:::16FSiS

• P:·:::16FS74

= cters;e

:1 cte~e:;:

Mict.OO-':)ntroller Cor~ Fe3tuna:

H~g-~·::rform;;.nc: :;13<: CPU :)d~-3B aingli w-:-•; instr~-:ti:;~r,;; !·:-lear~

.t.,H -single :y: e in:o:ruct-:c·!~ e.f.c,:,:-1 l'or pr::.f:Jr.,,tr

Or::.r.c~:~ o'lh;ch :;·~ :,•,c ~yc~

C•perat ·-;-speed: D•: • ~0 t-1'-z c-:-:k inpu:

DC· ~00 r1s ins:ruct e "! ctCMt Up ~=-SV. ~ l4 w:.~d! of F!..t>.~-H Prc:gr,:;m Me~l·!')'.

u:. ^{t: ~ea} x 5 ·:yt~·• ;;.~ Oa:l \1em~r:t' (.=~.lo.ft·

U:· ~:· :5e ^{~ S :-yt:~ ·:·f EEPROM ·:::1.3 r1:~1ory}

Pir,out {M1~a:ib1e :o :he-PIC 16Ci~S-'4::7C.•77 ln:errup: ·:apabili:y fup :c 14 sourc:;:

E:~ht level deep :..~r:iMr.;, s:ac-;

0if'E,·~t. r,:;tiri'~: -#~.: f'E,!3:i•,·e j,ddrE:Siin-; 1':"•:.: iS P·:wer-on ?.e-s:-1 1.POR :•

P-:wer-up Timer : =·r~RT) J," ::1 G~:illator :br.-up Tirri-r ·:O ST't

~\13t·:::hQcg Tmer (~\l)i:• Wlh itii ·:wn ·:r,-:hip R::::

:.s:illaw :.:.· re:lia:le :.perat·:•n Prograrr,labie :cde--.: •.:.:ecticn P·:we-r !-3•/."•; SL::~ rr.:.Ce,

S~h!c:able ::I!Ci!l:!~:·· op:i'!IM

l::~.• •• :.:w;.r .. ~ ·;r,..spee·: CW::S F ... :..~H:EEP:;:M

technology F·) ·'f mt:c oe;ign

ln .. -: ire.~ Se.rial Pr::~~ranming""":iCSP) ~·ia :lo\"C plrt!

~.ir.gle ~··i 1.•-81rcwit ~erial Pr:.gr.r.r·l'lllng -:apaPili:y In-C ire~~ De:•Jgg ·.; •:ia :.•,c pins

Proce;;s-:.r n:.J·~:w•ite. ao:es:: IC prograrr m!rK'y

~'vidi oper3:ir,il ... ~lta·;i range. ~ .. :v :o f..5V Hig.": Sin~<3c~.·.:e :::urr~:: :25 nA

Cc ~lrr;r:i.al and lnci•JSI";;;; ~ir1p~·i:ure- ra~ges

lo,•,.:.:we-r ,:onswr1p:icn:

" ::: mA :~·:·i:al :'~! S•J. 4 MH=

20 ~·-~>. ~~-~ .~al :~· ~.\:: ~2 li.H:

~: 1 ... :.. ~YP -:al nandby :u"T~~:

Pin Diagram POIP

~ ... •:.:0:1'~-·~; .,.,,

.. --

..._...

I•Al•~,l~~> - h~~-... ._. •• : ; ; ; - t.~-;.GU·~'"~ . -

·:t·.~-~~­

n!~o.5·~..,:- r•:

'· ;

"

10'

--

l.'

~~

I!

;t " ^~~

~ ^l;

I;; ,,

~ '"

'f- ,.,

"

^·~

;;: ^;:

;:

l!

"

.• , '"

"

-

l•t!:•;•;;v

-

~~~···::·:

-

··~~

-

··~

-

·-~~·,.::.r

- _-

^{l<!l; 1<:11}

-

^{I• :I:• '.II}

- l l l o ; .

_.,,..,

-

··~.'.1!.1

- - -

^{I•~M~I~ ··~!.1~·~ lo;:U!.N}

-

·--~.o.to..~,t..-

-

^.. ~!.'1\-t:r.

-

^.. -~!;!.IT.l

-

!.-~~·~·~·!<::~

-

I•~>,H;I~

-

^.. :.-.1~1-;,

Peripheral Fe-atures:

Tiner1J: .:~:·~ ~mer:.~cun:e-r wit~ 2-bi~ :.~~scli!-r

T'ner1: • :=-bil ~,1er::cun:er wi:M pre:oc::. tr o;or, b~ lnc·e-r1e"-:ed :wring s:eep 'i:; e~:emi cr~·sul:ci::~OI.

Tir1er'1: ;.: it ~mer:.:eun:e-r wit" 2-bi: :~~~::>d

regist!", pres::;!' and pos:!.·~3il!!r

T,•,o Cap:ure, C·:r1pa•t:. ::·.t~M fl"l:)~wl!!

Capt~ ·e-is t~-=· :. rYr:\~. '!~o!u:i::>~"1 s ·:: . .: r,!

- (.:)r.-:-3"! is·-:-·:.: ma:t. '-Hclu:;::,n s.::;:;ns

• =wr.; r.-:.~ r~so:lut!:·r1 is 1C-: 1

tC-b ': .11ult-:hanne Ana!cg-:c·CitJal c-:.•..,e,r:tr S}ln:h·c·-:·: us 1~·ial P~r:iSSP: witr1 SPi_,. :,Ma;,w M:.:e:• :;~.: :c-. i.l.-':me,r·'3l'~'!l>:•

~nivers:o.l.Sync .. ~:.r.::>Ui Asynchrcncus =,aoc;;,·.,tr T:'J""Smir:,;.r :.J3ARi:~.CI) wi:r, G-b: i·~.:re-ss

de:e.c:ion

=:o.ra'lel ^~IJ'Je =or: :P$P:z :1:-:-i':swide, w:h ell:ema FD. ":fA. an: Cf c:.Nrc ll :4:·'""-·:· .• onlyj 8rcwr.-out de:!-:~ion :ircu:try for

arcwr.-out R s-se.: ·: :::: R:

PIC16F87X

Key F.uturu

PICmicro""' Mid-Range Reft>re-n~t- PIC16Fe73 PIC1?FB7ol. PICI.S:Fe76 p,-CUF877 Manual (DS33023)

Operat ~-; _=rt~u~~·~Y :n:· . .2:0 '·11-i: ~''; · :o ',IH.z "''·-01 _, 0:::-:::C MHZ

Reset~> :a~ ::I D:laya": =oR.=~~ Pr:OR. ::R P::'R. :!:R PI)R, :!OR

·?WRT. os::- ^{·: :~•:.'AT,} ::.sr: .:::~·,,.\'RT, osr:. :=··/Hi, .OSTt

F:_A3-i =r:>gr;.m Mo:'llCr)' '-:.<.

,,

:,~ ! r~

:_':..J·blt~-:-•!fs:

D~~l \lerr~ry ib:fle:s:• Hi2 E.i. -?e: ^~~s

EEPRC¹,1 Ca::i ¹,terr-:-r~· 1": t:: ::.: :5co

ln:trrup:! i:l

..

¹³

^,,

I::) =or.s _:: :;,r.5 -~--= ,.; P,:·u.-=-.. a.:.:•.E ^{=or:s A 3 ,C} P-:.m _.t.,,S c.:•.E

-imers 2 l

Ca~:ure:Ccmpare:P~'Viv1 11odules 2

-

^{: 2}

Ssrial :::cmr1u~ -:ati:-r,;: t.1S:2=. IJ~,t..RT tl:!:!P. .S.t..RT I..'S~.P .·sARi MS~-P '.:SARi P:.•3

'

C:;,n_nwnk:J::ens PSP PSP

i :O·bit An.:tlcg-:o-C i~ta 1.-',:-~wi:- ~ ~:·~·t:::h.:~~~~'S S i .. :· .. ~ :::h.an.·: s ~ ~: .. t :h.a·-=! s ~!:"'1 :h4.",'!= s lnst• ... :~ ~r, 3~: :3! 1•-st·w::i~n~ :?! i-:n-:.::~ion~ :3! 1.~-strwc.:ion! .::

..

1 . " ; :rue::ions

Pin Description Pin Description

1 MCLR- Master clear 40 RB7- PORT B bit 7

2 RAO- PORT A bit 0 39 RB6- PORT B bit 6

3 RAI -PORT A bit I 38 RB5 -PORT B bit 5

4 RA2- PORT A bit 2 37 RB4- PORT B bit 4

5 RA3- PORT A bit 3 36 RB3 -PORT B bit 3

6 RA4/TOCKI -PORTA bit 4/ Counter elk 35 RB2- PORT B bit 2

7 RA5 -PORT A bit 5 34 RBI- PORT B bit I

8 REO- PORTE bit 0 33 RBO/INT- PORT B bit 0

9 REI -PORTE bit I 32 Vdd-+ V supply

10 RE2- PORTE bit 2 3I Vss-Gnd

11 Vdd-+ V supply 30 RD7- PORT D bit 7

I2 Vss-Gnd 29 RD6- PORT D bit 6

13 OSCI /CLKIN 28 RD5 -PORT D bit 5

I4 OSC2 I CLK OUT 27 RD4- PORT D bit 4

15 RCO- PORT C bit 0 26 RC7- PORT C bit 7

16 RC1- PORT C bit I 25 RC6- PORT C bit 6

I7 RC2- PORT C bit 2 24 RC5- PORT C bit 5

I8 RC3 -PORT C bit 3 23 RC4- PORT C bit 4

I9 RDO- PORT D bit 0 22 RD3 -PORT D bit 3

20 RDI-PORTDbit I 2I RD2- PORT D bit 2

\

APPENDIXC

L293 DATAHEET

I

L293, L293D

QUADRUPLE HALF-H DRIVERS

---·~clcR~~OSS~~~~~~'JU~NE02~002

• Featuring Unitrode L293 and L293D Products Now From Texas Instruments

• Wide Supply-Voltage Range: 4.5 V to 36 V

• Separate Input-Logic Supply

• Internal ESO Protection

• Thermal Shutdown

• High·Noise-lmmunity Inputs

• Functional Replacements for SGS L293 and SGS L293D

• Output Current 1 A Per Channel (600 rnA for L293D)

• Peak Output Current 2 A Per Channel (1.2 A for L293D)

• Output Clamp Diodes for Inductive Transient Suppression (L2930)

description

The L2B3 and L293D are quadruple high~current

half-H drivers. The L293 is designed to provide bidirectional drive currents of up to 1 A at voltages from 4.5 V to 36 V. The L2930 Is designed to provide bidirectional drive currents of up to 600-mA at voltages from 4.5 V to 36 V. Both devices are designed to drive Inductive loads such as relays, solenoids, de and bipolar stepping motors, as well as other high-current/high-voltage loads in positive-supply applications.

N, NE PACKAGE (TOP VIEW)

1,2EN r v·re Veer

1A

'

^{·r::. 4A}

1Y

'

^{14 4Y}

HeAT ~~~c~g

{

⁴

"

^\ HEAT SINK AND

5 "12 ) GROUND

2Y 6 11 3Y

2A ^{7 10} 3A

Vcc2

' •

^3.4EN

DWP PACKAGE (TOP VIEW)

1,2EN ' v 2e Veer

1A 2 27 4A

1Y

'

^{26 4Y}

NC 4 25 NC

NC

'

^{24 NC}

NC

' "

^NC

HEAT SINK ANO { ^{7 22}

l.

HE:AT SINK AND

GROUND

'

₀ ²¹ ₂₀

f

^GROUND

NC ¹⁰

"

^NC

NC 11

"

^NC

2Y ¹² 17 3Y

2A

" ,.

3A

Vcc2

"

^{15 3,4EN}

All inputs are TTL compatible. Each output is a complete totem-pole drive circuit, with a Darlington transistor sink and a pseudo-Darlington source. Drivers are enabled in pairs, with drivers1 and 2 enabled by 1,2EN and drivers 3 and 4 enabled by 3.4EN. When an enable input is high, the associated drivers are enabled and their outputs are active and in phase with their inputs. When the enable input is low. those drivers are disabled and their outputs are off and in the high-impedance state. With the proper data inputs, each pair of drivers forms a fuii-H (or bridge) reversible drive suitable for solenoid or motor applications.

On the L293, external high-speed output clamp diodes should be used for inductive transient suppression.

A Vcc 1 terminal, separate from Vcc:2· is provided for the logic inputs to minimize device power dissipation.

The L293ancl L293D are characterized for operation from o·:·c to 70·= C,

A.

Please be aware thm. orr important notice concerning avt"~ilability, stand.:.ra w!lm:mry, !lrtd use in critical applicmicns of

~ Texas. Instruments sem1conductor products aM 111sdaimers thereto appears ot the end of trr1s dato. sheet.

~TEXAS

INSTRUMENTS

FCG"7" CFFICE SOX ~5~2:13 • 0!\L~:.S, TEXAS n::l~~

L293,L293D

QUADRUPLE HALF-H DRIVERS

$LRS00BS- SEPTEM6ER 1SI6Q- REVISED JUNE 2002

block diagram

7

....

_{~J_}

vc

NOTE: Output diodes are imernal in L2fi3D.

TEXAS INSTRUMENTS AVAILABLE OPTIONS

PACKAGE

TA ^PLASTIC _DIP

(NE)

O·'-C to 70"'C ^L293NE L293DNE

1 1 Unitrode Products iliiiil: from Texas Instruments

AVAILABLE OPTIONS PACKAGED DEVICES

.. R

12 11

I I IV_

TA ^{SMALL PLASTIC}

2

OUTLINE DIP (DWP) (N)

o·,·c to ?o-:·c ^{l293DWP L293N}

l293DDWP L293DN

The DWP package1s avmlable taped und reeled. Add the suffix TR to device type {e.g., L293DWPTR} .

.Ji}

^TEXAS

INSTRUMENTS

'"'0STOFFICE :!OX ~;i3Cl• DALLAS. TS:XAS 7ii.le5

7

1 0

1 i

'

0

I Week

I~·'·""~ of Project Topic I·! U(Jll' fiUPO'Il

I· II

I "', .• .:.

1' rvvork: ·

lOI

lriOJm work continue

APPENDIXD

FYP II PROJECT GANTT CHART

2 l 4 ! j 7 I ! 10 II 12 13 14

1 oflnterim Report Final

I

Draft 0

lvmr

h ^~ · ;

1flnterirn Report

0