Mostek
SCHEMATIC
CLOCK - 7219-8051-ALARM
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HOURS
MINUTES
SEG-A
7
A
6
B
4
C
2
D
1
E
9
F
10
G
5
DP
3
COMM
SG1
7-SEG-HDSP
HDSP-5503-CC
8
NC
7-SEG-HDSP
SEG-A
7
A
6
B
4
C
2
D
1
E
9
F
10
G
5
DP
3
COMM
SG2
7-SEG-HDSP
HDSP-5503-CC
8
NC
7-SEG-HDSP
SEG-B
SEG-B
SEG-A
7
A
6
B
4
C
2
D
1
E
9
F
10
G
5
DP
3
COMM
SG3
7-SEG-HDSP
HDSP-5503-CC
8
NC
7-SEG-HDSP
SEG-A
7
A
6
B
4
C
2
D
1
E
9
F
10
G
5
DP
3
COMM
SG4
7-SEG-HDSP
HDSP-5503-CC
8
NC
7-SEG-HDSP
SEG-C
SEG-C
SEG-B
SEG-B
SEG-D
SEG-D
SEG-C
SEG-C
SEG-E
SEG-E
SEG-D
SEG-D
SEG-F
SEG-F
SEG-E
SEG-E
SEG-G
SEG-G
SEG-F
SEG-F
SEG-G
SEG-G
SEG-DP
SEG-DP
SEG-DP
SEG-DP
SEG-C
SEG-B
1
2
D6
LED
1
2
D7
LED
DIGIT-5
DIGIT-4
DIGIT-3
DIGIT-2
LED
LED
12VOLT
1
2
LS1
BUZZROUND
ALARM
DIGIT-7
1
2
D8
DIODE-4148
COLLON
ALARM
BUZZER
1
2
3
Q1
NPN
C
B
E
2N2222
PM
P14
9
10
1
8
U5D
4050
HEX BUFFER
MAX 7219
GND
SECONDS
SEG-C
SEG-B
VCC
1
2
D9
LED
1
2
D10
LED
10K
SEG-A
7
A
6
B
4
C
2
D
1
E
9
F
10
G
5
DP
3
COMM
SG5
7-SEG-HDSP
HDSP-5503-CC
8
NC
7-SEG-HDSP
SEG-A
7
A
6
B
4
C
2
D
1
E
9
F
10
G
5
DP
3
COMM
SG6
7-SEG-HDSP
HDSP-5503-CC
8
NC
7-SEG-HDSP
1
2
R6
SEG-B
SEG-B
LED
LED
SEG-C
SEG-C
CLOCK
P10
13
CLK
1
DIN
12
/CS
14
A
16
B
20
C
23
D
21
E
15
F
17
G
7
D3
6
D2
11
D1
2
D0
24
DOUT
19
VCC
9
GND
U6
max7219
8 DIGIT 7SEG DISPLAY
4
GND
8
D7
5
D6
10
D5
3
D4
22
DP
18
ISET
SEG-A
SEG-D
SEG-D
DIN
P11
SEG-B
SEG-E
SEG-E
/CS
P12
SEG-C
SEG-F
SEG-F
DIGIT-6
SEG-D
SEG-G
SEG-G
DIGIT-0
SEG-E
DIGIT-1
SEG-F
DIGIT-2
SEG-G
DIGIT-3
SEG-DP
SEG-DP
DIGIT-4
SEG-DP
DIGIT-5
DIGIT-6
DIGIT-7
DIGIT-1
DIGIT-0
GND
9
10
1
8
U5D
4050
HEX BUFFER
9
10
1
8
U5D
4050
HEX BUFFER
GND
unused gate input grounded