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
A3
Date: 2022/6/22 Sheet of
File: E:\电路城（51单片机）2\..\Sheet1.SchDocDrawn 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
1
2
3
4
5
6
7
8
9
RP1
RESP
S1
SW-PB
LS1
Speaker
VCC
GND
10K
R3
Res2
S2
SW-PB
S3
SW-PB
S4
SW-PB
S5
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
P00
P01
P02
P03
P04
P05
P06
P07
P27
P26
P25
P24
P23
P22
P21
P20
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
GND
1K
R2
RPot
VCC
VCC
P00
P01
P02
P03
P04
P05
P06
P07
P22
P21
P20
GND
P34
P35
P36
P37
P33
A
2
B
3
E
1
Y0
4
Y1
5
Y3
7
Y2
6
U10
74139
GND
1
T-
2
T+
3
CS
6
SO
7
NC
8
VCC
4
SCK
5
U2
MAX6675
VCC
GND
1
2
P2
热电偶
P30
P32
GND
1
T-
2
T+
3
CS
6
SO
7
NC
8
VCC
4
SCK
5
U3
MAX6675
VCC
GND
1
2
P3
热电偶
P30
P32
GND
1
T-
2
T+
3
CS
6
SO
7
NC
8
VCC
4
SCK
5
U4
MAX6675
VCC
GND
1
2
P4
热电偶
P30
P32
GND
1
T-
2
T+
3
CS
6
SO
7
NC
8
VCC
4
SCK
5
U5
MAX6675
VCC
GND
1
2
P5
热电偶
P30
P32
P24
P23
P17
3
VCC
2
DQ
1
GND
30.0
U6
DS18B20
GND
VCC
3
VCC
2
DQ
1
GND
30.0
U7
DS18B20
GND
VCC
3
VCC
2
DQ
1
GND
30.0
U8
DS18B20
GND
VCC
3
VCC
2
DQ
1
GND
30.0
U9
DS18B20
GND
VCC
P27P26P25 P31
Q?
NPN
