U1A
4518BD_5V
1A
3
1B
4
1C
5
1D
6
EN1
2
MR1
7
CP1
1
A1
555_VIRTUAL
GND
DIS
OUTRST
VCC
THR
CON
TRI
VCC
5V
GND
R1
1k¦¸
R2
2k¦¸
C1
10nF
C2
10nF
U2A
74LS08D
U3A
74LS32D
U4A
74LS00D
U5A
74LS00D
29
28
VCC
27
26
25
24
GND
XSC1
A B C D
G
T
37
23
U1A
4518BD_5V
1A
3
1B
4
1C
5
1D
6
EN1
2
MR1
7
CP1
1
A1
555_VIRTUAL
GND
DIS
OUTRST
VCC
THR
CON
TRI
U6
74LS160D
QA
14
QB
13
QC
12
QD
11
RCO
15
A
3
B
4
C
5
D
6
ENP
7
ENT
10
~LOAD
9
~CLR
1
CLK
2
U7
74LS160D
QA
14
QB
13
QC
12
QD
11
RCO
15
A
3
B
4
C
5
D
6
ENP
7
ENT
10
~LOAD
9
~CLR
1
CLK
2
U8
74LS160D
QA
14
QB
13
QC
12
QD
11
RCO
15
A
3
B
4
C
5
D
6
ENP
7
ENT
10
~LOAD
9
~CLR
1
CLK
2
U9A
4508BD_5V
MR1
1
~EO1
3
ST1
2
1D0
4
1D1
6
1D2
8
1D3
10
1O0
5
1O1
7
1O2
9
1O3
11
U10A
4508BD_5V
MR1
1
~EO1
3
ST1
2
1D0
4
1D1
6
1D2
8
1D3
10
1O0
5
1O1
7
1O2
9
1O3
11
U11A
4508BD_5V
MR1
1
~EO1
3
ST1
2
1D0
4
1D1
6
1D2
8
1D3
10
1O0
5
1O1
7
1O2
9
1O3
11
U12
4511BD_5V
DA
7
DB
1
DC
2
DD
6
OA
13
OD
10
OE
9
OF
15
OC
11
OB
12
OG
14
~EL
5
~BI
4
~LT
3
U13
A B C D E F G
CK
U14
A B C D E F G
CK
U15
A B C D E F G
CK
VCC
5V
J1
Key = Space
GND
GND
VCC
11
12 16
21222324
1
GND
GND
VCC
5V
R1
1k¦¸
R2
2k¦¸
C1
10nF
C2
10nF
U2A
74LS08D
U3A
74LS32D
U4A
74LS00D
U5A
74LS00D
4
5
7
VCC
2
8
R6
100¦¸
37
R7
100¦¸
R8
100¦¸
R9
100¦¸
R10
100¦¸
R11
100¦¸
R12
100¦¸
28
29
30
31
32
33
GND
J2
Key = B
VCC 5V
GND
GND
VCC
34
GNDVCC
5V
GND
VCC
U17A
74LS00D
U16A
74LS32D
46
cp
dis
48
of
6
GND
VCC 5V
J3
Key = A
45
GND
VCC
GND
38
39
40
41
42
43
44
49
36
35
3
27
26
25
20
ds
Qi
47
cr
le
