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  • M CH Thu Phát H NG Ngo I 1

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    linhmevatli
    142 views18 pages

    Original Title

    Mạch Thu Phát Hồng Ngoại 1

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    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
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    142 views18 pages

    M CH Thu Phát H NG Ngo I 1

    Uploaded by

    linhmevatli

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Flag for inappropriate content
    of 18

    CHO THY V

    CC BN
    GVHD:Thy Nguyn Vn Hiu
    NHM 5 GM C:
    Nguyn Ch n
    Trn Phng Linh
    Cao Trng Nhn
    L Hong Anh Quc
    Nguyn Th Ngc Sng
    Nguyn Th Thng
    iu khin mt m hnh mt khong cch
    no m con ngi khng nht thit trc
    tip n ni t h thng.
    iu khin t xa????
    CC HNH THC IU KHIN T XA
    iu khin dng hng ngoi

    iu khin dng sng v tuyn

    iu khin dng tia lazer

    Trong nhiu ng dng iu khin thit b in ,iu
    khin t xa c s dng rng ri.

    iu khin t xa s dng hng ngoi, dng IC PT2248
    v PT2249
    tng:


    nh sng hng ngoi l nh sng khng nhn thy,c bc
    sng t 0.86m n 0.98m,truyn i c nhiu knh tn
    hiu,d b hp th, kh nng xuyn thu km.

    Da vo nguyn l hng ngoi,nn thit k v ch to
    mch thu pht hng ngoi theo s khi nh sau:


    Nguyn l thu pht hng ngoi:

    S khi ca mch
    IC PT 2248 v 2249

    1/IC PT 2248:
    Dng iu khin pht tn hiu hng ngoi c 18 chc
    nng m ha khc nhau.
    PT2248 vi in p :2.2V - 5V

    IC PT2249:
    Dng thu tn hiu t PT2248 v gii m tn hiu t
    PT2248 cho ra cc knh tng ng vi 10 knh tn hiu.

    2/ Dao ng thch anh tn s : 455KHZ
    3/ LED pht hng ngoi
    4/ Module thu 3 chn (v st)
    5/ in p cung cp l 5V
    La chn linh kin:
    S khi ca mch pht.
    S khi ca mch thu.


    S CHN
    S CHN
    Mch pht dng PT2248
    Mch thu dng PT2249
    CM N THY V CC
    BN THEO DI

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