S7
S1
S2
S3
S4
S5
S6
S0
S1
S2
S3
S4
S5
S6
S7
S0
S1
S2
S3
S4
S5
S6
S7
S0
U1
7SEG-MPX4-CA-BLUE
OUT1
21
ADD B
24
ADD A
25
ADD C
23
VREF(+)
12
VREF(-)
16
IN3
1
IN4
2
IN5
3
IN6
4
IN7
5
START
6
OUT5
8
EOC
7
OE
9
CLOCK
10
OUT2
20
OUT7
14
OUT6
15
OUT8
17
OUT4
18
OUT3
19
IN2
28
IN1
27
IN0
26
ALE
22
U3
ADC0808
EOC
START
U2(CLOCK)
OE
AIE
Q1
2N2222A
Q2
2N2222A
Q3
2N2222A
Q4
2N2222A
Q5
2N2222A
Q6
2N2222A
R1
2k
R2
2k
R3
2k
R4
2k
R5
2k
R6
2k
P23
P22
P21
P32
P31
P30
R7
10k
XTAL2
18
XTAL1
19
ALE
30
EA
31
PSEN
29
RST
9
P0.0/AD0
39
P0.1/AD1
38
P0.2/AD2
37
P0.3/AD3
36
P0.4/AD4
35
P0.5/AD5
34
P0.6/AD6
33
P0.7/AD7
32
P1.0/T2
1
P1.1/T2EX
2
P1.2
3
P1.3
4
P1.4
5
P1.5
6
P1.6
7
P1.7
8
P3.0/RXD
10
P3.1/TXD
11
P3.2/INT0
12
P3.3/INT1
13
P3.4/T0
14
P3.7/RD
17
P3.6/WR
16
P3.5/T1
15
P2.7/A15
28
P2.0/A8
21
P2.1/A9
22
P2.2/A10
23
P2.3/A11
24
P2.4/A12
25
P2.5/A13
26
P2.6/A14
27
U7
AT89C52
OUT8
OUT7
OUT6
OUT5
OUT4
OUT3
OUT1
OUT2
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
S[0..7]
K3
K4
START
P21
P22
P23
P30
P31
P32
ALE
tem
fan
OE
K1
K2
EOC
1 2
U2:A
74LS05
3 4
U2:B
74LS05
5 6
U2:C
74LS05
9 8
U2:D
74LS05
11 10
U2:E
74LS05
13 12
U2:F
74LS05
1 2
U4:A
74LS05
3 4
U4:B
74LS05
5 6
U4:C
74LS05
9 8
U4:D
74LS05
11 10
U4:E
74LS05
13 12
U4:F
74LS05
1 2
U5:A
74LS05
3 4
U5:B
74LS05
5 6
U5:C
74LS05
9 8
U5:D
74LS05
RV1
1k
C1
4.7u
TEM-CONTROL
CCT002
C-signal
open
close
D2
LED-RED
D3
LED-GREEN
R8
1.2k
FAN-CONTROL
CCT003
C-signal
open
close
fan
D4
LED-RED
D5
LED-GREEN
R9
1.2k
tem
A
B
tem
