dtmf based cell phone operated toy car-3.pptx

7/21/2019 DTMF BASED CELL PHONE OPERATED TOY CAR-3.pptx

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DTMF BASED CELLPHONE OPERATED TOY

CARBy Mohammed Jasser Hussain

12311A0427


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DTMFKEYPAD

hen you !ress a "ey #$osinusoida% si&na%s o'(orres!ondin& 're)uen(iesare &enera#ed and aresu!erim!osed and #heresu%#in& si&na% is (a%%edDTMF #one*


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0 0.5 1 1.5 2 2.5 3 3.5-1

0

1sinus oidal signal 1

0 50 100 150 200 250 300 350-1

0

1sinus oidal signal 2

0 50 100 150 200 250 300 350-2

0

2addition of two s ine waves


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+an $e $or" dire(#%y $i#h #ones , Ho$ #o "no$ $hi(h D+ mo#ors #o -e used , +an $e in#er'a(e our norma% D+ mo#ors $i#h ourmi(ro(on#ro%%ers , hi(h one is -e##er a re%ay or a H.-rid&e/ 2 3 + s , ha# is #he 5a$ in usin& 2 3D,

6 ME F THE 89E6T :6 E K :F ; T DAY


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BA6 + B +K D A


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HT 170DE+ DE;

As #he name im!%ies i# s ade(oder* # de(odes a%% #he 1=DTMF #ones o' a s#andard "ey!ad* Tones o#her #han #he s#andardones $i%% no# -e de#e(#ed -y #his+*

# s a 1> !in + $i#h minimumnum-er o' e?#erna% (om!onen#s* #s su!!%y @o%#a&e is 2* . *


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HT 170 DE+ DE;+ ;+9 T


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H.Brid&e2 3D


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2 3D + ;9 T TH A:D TH 9T FYBA+KD DE6


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;E AY6

6P6T ;E AY 6PDT;E AY6


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Ho" to c#oo$e a

%otor


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Ad@an#a&es and Disad@an#a&eso' DTMF

1* The dis#an(e #ha# ;F modu%es !ro@ide is @ery %ess*2* e (an (onne(# our -o#s 'rom a%mos# any$here around #he $or%d*

3* This (an -e used 'or home au#oma#ion*4* This $as used in #e%e(ommuni(a#ion si&na%in&*

1* You ha@e #o !ay 'or (a%%s*2* Ba##ery dis(har&es @ery 'as#%y*3* n%y s!e(i ( !hones (an -e used*

ha# im!ro@emen#s (an -e done,


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dtmf based cell phone operated toy car-3.pptx

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