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M CH Thu Phát H NG Ngo I 1
M CH Thu Phát H NG Ngo I 1
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