MCH KHA S DNG IC 4017
1. S nguyn lV C C _ 1 2 2 2 14 15 R 1 0 2 k 12 16 C 5 1 0 4 U 2
4 0 1 7 0 V A 1 2 2 2 0 V A C
C L A LM S P1 3 1 2 0 7E R 5 4
C LK
R ST
8 1 3
VC C
C O
G E
N N
D
V
C
C D 1
_ 1 4 N Q
2
Q Q Q Q Q Q Q Q Q Q
0 1 2 3 4 5 6 7 8 9
A
4 0 1
L
A
Y
S
P
D
T
3 2 4 7 10 1 5 6 9 11
R 4 K
7
D
4
6 8
D
5 1 N
D 4
6 1 41 8N
D
7 4 1 4 8 1 N
D
8 4 1 4 8 1 N
D 4
9 1 4 N 1 8
D
1 0 4 1 4 8 1 N 4 1 4 8
V
C
C
_
1 2
R V C C Q C R 4 1 0 K _ 2 1 8 1 2 R 1 K 1 5
E
S
E 0 T
1
2
3
4
5
6
7
8
9
2. Lit k linh kin: Linh kin s dng S lng IC 4017 1 Relay 5 chn
12VDC 1 Diode 1N4148 6 Diode 1N4007 1 in tr 10K 2 in tr 4K7 1 in tr
1K 2 T 104 1 Nt nhn nh 2 chn 11 Transistor C1815 1 Transistor D468
1 Bng n 220 VAC 1
3. Nguyn l hot ng: CD 4017 l IC m hng c 10 u ra , ng vi cc xung
clock th ln lt cc u ra s mc cao, ta tn dng tnh nng ny d u ra mc cao
tr v u vo clock theo s m ho bn phm. Khi mi cp in cho mch, ic c
reset, u ra Q0 c mc cao, lc ny nu n phm s 0 th mc cao ny s c a vo
chn clock lm cho ic m hng a u ra Q1 mc cao, nu tip tc n phm s 7 th
Q2 s nhy ln mc cao ln lt n ng cc phm th s a n Q6 mc cao kch mch in
m kho.Nu n sai m s th C1815 c phn cc thun a vo chn reset ca ic. Ic
s tr li trng thi ban u. Tu theo cch sp xp cc diode m chng ta c nhng
m s khc nhau. y theo s yu cu ca thy Bnh th m s ca mch ny l: 070489.
4. S khi ca mch:
NGUN
TO XUNG CLOCK
IU KHIN
RESET
NG RA
HIN TH
5. Chc nng ca tng khi: Khi ngun y c s dng l ngun 12VDC cung cp
cho mch hot ng Khi to xung clock gm: cc nt nhn th t 0;4;7;8;9 kt hp
vi cc diode 1N4148, in tr 10K v t 104 to nn b to xung clock cp vo
chn 14 ca IC 4017. Khi iu khin: l IC 4017 xut ng ra mc cao khin mt
thit b no . y, theo yu cu ca thy Bnh l iu khin mt bng n 220VAC. Khi
Reset gm: cc nt nhn th t 1;2;3;5;6 kt hp vi Transitor C1815 dc a n
chn 15 ca IC 4017. Khi mt trong cc nt nhn cc v tr trn c tc ng s phn
cc thun cho C1815 a n chn 15 ca IC 4017. Ic s tr li trng thi ban u.
Khi ng ra gm: Relay 12VDC kt hp vi Transitor D468 ng ngt bng n
220VAC. Khi hin th: l bng n 220VAC bo mch hot ng tt.
6. S chn IC 4017:
7. S mch in:
8. Mch thc t:
