1
1
2
2
3
3
4
4
D D
C C
B B
A A
Title
Number RevisionSize
A4
Date: 2017/8/13 Sheet of
File: D:\ \..\ .SchDoc Drawn By:
RST
4
DIS
7
THR
6
TRI
2
CON
5
GND
1 VCC
8
OUT
3
U17
NE555
VCC
15K
R1
68k
R2
10uF
C1
0.1uF
C2
GND
100
R4
K1
A
15
B
1
C
10
D
9
Load
11
CLR
14
UP
5
DOWN
4
QA
3
QB
2
QC
6
QD
7
BO
13
CO
12
VCC
16
GND
8
U10
74ls192
U6
DCD-LED
U5 DCD-LED
A
15
B
1
C
10
D
9
Load
11
CLR
14
UP
5
DOWN
4
QA
3
QB
2
QC
6
QD
7
BO
13
CO
12
VCC
16
GND
8
U9
74ls192
1
2
3
U16A
SN7432
D0
10
D1
11
D2
12
D3
13
D4
1
D5
2
D6
3
D7
4
EI
5
A0
9
A1
7
A2
6
GS
14
EO
15
VCC
16
GND
8
U1
74ls148
1D
2
1CLK
3
~1PR
4
1Q
5
~1Q
6
~1CLR
1
U2A
74ls74
1D
2
1CLK
3
~1PR
4
1Q
5
~1Q
6
~1CLR
1
U2B
74ls74
1D
2
1CLK
3
~1PR
4
1Q
5
~1Q
6
~1CLR
1
U3A
74ls74
1D
2
1CLK
3
~1PR
4
1Q
5
~1Q
6
~1CLR
1
U3B
74ls74
S7
SW-PB
S6
SW-PB
S5
SW-PB
S4
SW-PB
S8
SW-PB
S2
SW-PB
S3
SW-PB
S1
SW-PB
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1K
R3
Res Pack4
VCC
GND
VCC
VCC
VCC
VCC
VCC
GND
VCC
1
2
13
12
U4A
74LS11
1
2
13
12
U5A
74LS27
1
2
3
U7A
74LS08
1
2
4
5
6
U8A
74LS21
VCC
GND
GND
U11
DCD-LED
2
3
4
5
9
10
11
12
1
13
U12
4078
3
4
5
6
U4B
74LS11
4
5
6
U7B
74LS08
1
2
3
U13A
74LS00
1
2
3
U14A
74F86
2
3
1
U15A
74LS02
9
10
8
U7C
74LS08
9
10
11
8
U4C
74LS11
D1
LED0
1 16
1K
R5A
GND
- 1
- 2
- 3
- 4
- 5
- 6
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