IR Remote Control Tester.docx

5.IR REMOTE CONTROL TESTER

Wear ev e r ymuc hf a mi mi l i a rwi t ho urt e l e v i s i o ns e t s ,DVDs ,MP3pl a y er s ,mu s i cs y s t e ms ms a ndma nyot h erd ev i c et h ata r ec o nt r o l l e db yu s i n gI R Re mo mo t e .Th er ea r ema nyt y p esof r e mo mo t ec o nt r o l sa v a i l a bl ef o rd i ff er e ntd ev i c e sb utmo s to ft h em wo r ko na r o un d3 8KHz Fr e qu en c ys i g na l .So me me t i me swef a c eac ommo np r o bl e mr e l a t e dt oI RTVo ro t h erd ev i c e r emot ec ont r ol t hati fi ti swor k i ngornot .Wec hec kmul t i pl et i mest ofi ndi ft her emot ei s wo r k i n go rn ot .He r ewea r ego i n gt oma k ea nI nI RRe mot mo et e st e rc i r c ui t   us i ngTSOP1738 I R Re c e i v e rs e n s orc i r c u i t .Th i sTSOP1 73 8s e n s o rc a ns e n s e3 8Kh zF r e qu en c ys i g na l andc ande t ec tan yI Rs i gna l .

Comp mponent sRequi r ed •

TSOP1738

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L M7 M7 80 5Vo l t a geRe gu l a t o r

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1Kr es i s t or

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150ohm Resi st or

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1 00 0u Fc a pa c i t o r

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J u mp mp erwi r e s

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Br e adbo ar d

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9Vol tBat t er y

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Ba t t e r yCo nn ec t o r

•

Buzzer

•

LED

•

TVRemot e

I RRe mo mo t eCo n t r o l T e s t e r

5.IR REMOTE CONTROL TESTER

WhenTSOP1738sensorget sI R pul sesorsi gnali t sout putpi ngoesLOW andbecome HI GHag ai nwh ens i g na li sl os t .Byde f a ul to ut p utpi nr e ma i n si nHI GHs t a t e .ATSOP1 73 8 s e ns o ri ss ho wni nt h eb el o wi ma ge .

I RRe mo t eCo n t r o l T e s t e r

5.IR REMOTE CONTROL TESTER

Ci r c ui tDi a gr a ma ndEx pl a na t i on

Asshowni nt heaboveI Rr e mot ec ont r olt e st e rci r c ui t ,wehav econnect edabuzzer anday el l ow LED f ori ndi c at i on.LM7805Vol t ager egul at ori sal s oaddedi nt ot hec i r c ui t f orpr ov i di ng5v ol tv ol t ages uppl yt ot hec i r c ui t ,anda9v ol tbat t er yi sus edf orpower i ng t hec i r c ui t .Pi nnumber1ofLM7805i sc onnec t edt obat t er y ’ sPos i t i v et er mi nalandpi n s e c on di sc o nn ec t e dt og r o un dt e r mi n alo fb at t e r y .Pi n2o fTSOP1 73 8i sd i r e c t l y I RRe mo t eCo n t r o l T e s t e r

5.IR REMOTE CONTROL TESTER

c o nn ec t e dwi t hpi nnu mb er3ofL M7 80 5a ndfi r s tn umb eri sc o nn ec t e dt ogr o un d.Bu z z er i sc on ne c t e dt op i nn umb ert h r e eo fTSOP1 73 8t r o ug ha1 Kr e s i s t a nc ea ndy e l l o wL ED’ s negat i v et er mi nal i sc onnec t edwi t ht hes amet er mi nal t r ough150ohm r es i s t or .

Af t e rp o we r i n gu pt h ec i r c u i twh enwep r e s sa nybu t t o no fI R Re mo t et h enr e mo t es e nd s someI R pul sesofar ound38Khzf r equency .Thesepul sesar er ecei vedbyTSOP1738 s en s ora nda sd i s c us s eda bo v e,i tgi v e saL OW s i g na l .Weu s est h i sL OW o ut p uts i g na lt o a c t i v a t et hebu z ze ra ndLED.Sob yge t t i n gL OW o ut p uts i g na lo fTSOP1 73 8Bu z ze rs t a r t s be ep i n ga nd L ED s t a r tg l o wi n g,wh i c hi n di c at e st ha tt h er e mo t ec o nt r o li s wor k i n g c or r ec t l y .I ft hi sI Rr emot et es t erc i r c ui tdoes n' tr es pondwi t ht he r emot ec ont r ol ' sbut t on pr es ses ,i ti ndi c at est hatt her emot ec ont r oli snotwor k i ngpr oper l y .( Al s oc hec kt hi sTV r emot ec ont r ol j ammerc i r c ui t )

I RRe mo t eCo n t r o l T e s t e r