1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
D D
C C
B B
A A
Title
Number RevisionSize
A2
Date: 2022/5/12 Sheet of
File: I:\办公2022\..\Sheet1.SchDoc Drawn By:
P1.0
1
P1.1
2
P1.2
3
P1.3
4
P1.4
5
P1.5
6
P1.6
7
P1.7
8
RST
9
P3.0/RXD
10
P3.1/TXD
11
P3.2/INT0
12
P3.3/INT1
13
P3.4/T0
14
P3.5/T1
15
P3.6/WR
16
P3.7/RD
17
XTAL2
18
XTAL1
19
GND
20
P2.0
21
P2.1
22
P2.2
23
P2.3
24
P2.4
25
P2.5
26
P2.6
27
P2.7
28
PSEN
29
ALE/PROG
30
EA
31
P0.7
32
P0.6
33
P0.5
34
P0.4
35
P0.3
36
P0.2
37
P0.1
38
P0.0
39
VCC
40
U1
80511 2
Y1
XTAL
30pF
C2
Cap
10uF
C1
Cap Pol1
30pF
C3
Cap
10K
R1
Res2
GND
VCC
15
A
14
D7
13
D6
12
D5
11
D4
10
D3
9
D2
8
D1
7
D0
6
E
5
RW
4
RS
3
V0
2
VCC
1
GND
16
K
LCD1602
LCD1
1
2
3
4
5
6
7
8
9
RP1
RESP
S1
SW-PB
Q1
PNP
LS1
Speaker
GND
VCC
GND
10K
R3
Res2
S3
SW-PB
S4
SW-PB
S5
SW-PB
S6
SW-PB
P30
P31
P32
P33
P34
P35
P36
P37
P10
P11
P12
P13
P14
P15
P16
P17
Vin Vout
GND
7805
Volt Reg
0.1uF
C5
Cap
100uF
C4
Cap Pol1
0.1uF
C7
Cap
100uF
C6
Cap Pol1
1
2
P1
电源接口
GND
VCC
1K
R2
RPot
VCC
VCC
D5
LED3
10K
R8
Res2
D6
LED3
10K
R9
Res2
D7
LED3
10K
R10
Res2
D8
LED3
10K
R11
Res2
GND
P27
P26
P25
P24
P23
P34
P35
P36
P37
P27
P26
P16
P17
P23
CS
1
CH0
2
CH1
3
GND
4
VCC
8
CLK
7
DI
6
DO
5
U3
ADC0832
GND
VCC
P10
P11
CS
1
CH0
2
CH1
3
GND
4
VCC
8
CLK
7
DI
6
DO
5
U4
ADC0832
1K
R13
RPot
GND
VCC
P10
P11
CS
1
CH0
2
CH1
3
GND
4
VCC
8
CLK
7
DI
6
DO
5
U5
ADC0832
GND
VCC
P10
P11
CS
1
CH0
2
CH1
3
GND
4
VCC
8
CLK
7
DI
6
DO
5
U6
ADC0832
GND
VCC
P10
P11
P12
P13
P14
P15
硫化氢
VCC
GND
氨气
H1H2
6
4
5
1
3
2
U8
氨气MQ137
B1
H1H2
A2
A1B2
U7
硫化氢MQ136
1K
R32
RPot
GND
VCC
2
3
6
4 7
1
8
5
AR1
Op Amp
GND
VCC
10K
R14
Res2
10K
R15
Res2
10K
R16
Res2
10K
R17
Res2
GND
GND
0.1uF
C8
Cap
0.1uF
C9
Cap
2
3
6
4 7
1
8
5
AR2
Op Amp
GND
VCC
10K
R18
Res2
10K
R19
Res2
10K
R20
Res2
10K
R21
Res2
GND
GND
0.1uF
C10
Cap
0.1uF
C11
Cap
1K
R31
RPot
VCC
GND
B1
H1H2
A2
A1B2
U9
甲烷MQ4
2
3
6
4 7
1
8
5
AR3
Op Amp
GND
VCC
10K
R22
Res2
10K
R23
Res2
10K
R24
Res2
10K
R25
Res2
GND
GND
0.1uF
C12
Cap
0.1uF
C13
Cap
1K
R30
RPot
VCC
GND
B1
H1H2
A2
A1B2
U10
一氧化碳MQ7
2
3
6
4 7
1
8
5
AR4
Op Amp
GND
VCC
10K
R26
Res2
10K
R27
Res2
10K
R28
Res2
10K
R29
Res2
GND
GND
0.1uF
C14
Cap
0.1uF
C15
Cap