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DIGITAL ELECTRONICPROJECT

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TEAM MEMBERS

NEERAJ GUDI-2bv13cs057 NIKHIL MALAGI-2bv13cs058

NIKHIL INGNAL-2bv13cs059

NIKHIL KULKARNI-2bv13cs060

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SEVEN SEGMENT LED DE!D

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BCD to 7 Segment LED DisplayDecoe!

A isplay ecoe! is #se to con$e!t a BCD o! a %ina!y ca 7 segment coe #se to ope!ate a 7 segment LED is

T'e Decoe! #se is 7((7 IC & It 'as ( inp#t lines an 7lines&

Eac' igit is c!eate %y lig'ting t'e app!op!iate segmesegments a!e la%ele a)%)c))e)*)g

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P!inciple Be'in Display DecoeCi!c#it

T'e %asic iea in$ol$es !i$ing a common cat'oe 7+seLED isplay #sing 7((7 eoe! IC& T'e logic ci!c#it is ,it' ( inp#ts an 7 o#tp#ts) eac' !ep!esenting an inp#tisplay IC&T'e o#tp#t o* t'is ecoe! is *e into t'e comcat'oe ,'ic' isplays t'e n#m%e!s acco!ing to t'e in

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BCD TO SE-EN SEGMENT DISPLA.

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DECODER

A ecoe! is a logic ci!c#it t'at accepts a set o* inp#tst'at !ep!esents a %ina!y n#m%e! an acti$ates only t'eo#tp#t t'at co!!espons to t'e inp#t n#m%e!&

In ot'e! ,o!s) a ecoe! ci!c#it loo/s at its inp#tsete!mines ,'ic' %ina!y n#m%e! is p!esent t'e!e) anacti$ates t'e one o#tp#t t'at co!!espons to t'at

n#m%e! 0 all ot'e! o#tp#ts !emain inacti$eIt is a com%inational ci!c#it t'at con$e!ts %ina!yin*o!mation *!om n inp#t lines to a ma1im#m o* 2n#ni3#eo#tp#t lines&

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BCD+to+Se$en+Segment Decoe

A isplay ecoe! is #se to con$e!t a BCD o! a %ina!yinto a 7 segment coe&

T'e ecoe! ta/es a BCD inp#t an o#tp#ts t'e co!!ec*o! t'e se$en+segment isplay&

Inp#t4 A (+%it %ina!y $al#e t'at is a BCD coe inp#t&

O#tp#ts4 7 %its) a t'!o#g' g *o! eac' o* t'e segmentsisplay&

Ope!ation4 Decoe t'e inp#t to acti$ate t'e co!!ectsegments&

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PIN CON5IG6RATION O5 7((

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SE-EN SEGMENT LED DISPLA.

A se$en+segment isplay is a set o* se$en %a!+s'

elements) a!!ange to *o!m a s3#a!e+o 8g#!e 9&

A stana! 7+segment LED isplay

gene!ally 'as 9 inp#t connections &

Some single isplays 'a$e an aitional inp#t pin *o! t'

point in t'ei! lo,e! !ig't o! le*t 'an co!ne!&

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T"#$s %& s$v$' s$()$'* LED +,s#.Common Cat'oe Display :CCD;

In t'e common cat'oe isplay) all t'e cat'oe connections o* t'e LED se

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Common Anoe DISPLA.

:CAD;

In t'e common anoe isplay) all t'e anoe connections o* t'e LED sa!e ? o! =LO? signal $ia a s#ita%le c#!!ent lim!esisto! to t'e Cat'oe o* t'e pa!tic#la! segment :a+g;

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Analysis o* t'e 7+segment isplay&

A t!#t' ta%le is const!#cte ,it' t'e com%ination o* inpeac' ecimal n#m%e!& 5o! e1ample) ecimal n#m%e! ,

comman a com%ination o* % an c&

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TR6T@ TABLE

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Applications o* Display Decoe! Ci!

T'is ci!c#it can %e moi8e #sing time!s an co#nte!s tt'e n#m%e! o* cloc/ p#lses&

T'is ci!c#it can %e moi8e to e$elop an alp'a%et ispsystem instea o* a ecimal n#m%e! isplay system&

It can %e #se as a time! ci!c#it&

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T@AN .O6