1 2 3 4
A
B
C
D
4321
D
C
B
A
P2 2
GND
1
VCC
2
VO
3
RS
4
RW
5
EN
6
DO
7
D1
8
D2
9
D3
10
D4
11
D5
12
D6
13
D7
14
A
15
16
P1
LCD160 2
P2 0
K2
K3
P1 1
P1 0
R1
103P0 0
1
P0 1
2
P0 2
3
P0 3
4
P0 4
5
P0 5
6
P0 6
7
P0 7
8
P1 0/ADC0
9
P1 1/ADC1
10
P1 2/ADC2
11
P1 3/ADC3
12
P1 4/ADC4
13
P1 5/ADC5
14
P1 6/ADC6
15
P1 7/ADC7
16
P5 4
17
VCC
18
P5 5
19
GND
20
P3 0
21
P3 1
22
P3 2
23
P3 3
24
P3 4
25
P3 5
26
P3 6
27
P3 7
28
P4 1
29
P4 2
30
P4 4
31
P2 0
32
P2 1
33
P2 2
34
P2 3
35
P2 4
36
P2 5
37
P2 6
38
P2 7
39
P4 5
40
U1
STC15 W4K32S4
2 1
3
J1
DC5V
1
1
2
2
3
3
4
4
5
5
6
6
SW 1
KEY-6
+5
+5
+5
P0 0
P0 1
P0 2
P0 3
P0 4
P0 5
P0 6
P0 7
P0 0
P0 1
P0 2
P0 3
P0 4
P0 5
P0 6
P0 7
P1 0
P1 1
P1 2
P1 3
P1 4
P1 5
P1 6
P1 7
P5 4
P5 5
P4 5
P3 0
P3 1
P3 2
P3 3
P3 4
P3 5
P3 6
P3 7
P4 1
P4 2
P4 4
P2 0
P2 1
P2 2
P2 3
P2 4
P2 5
P2 6
P2 7
按键检测
单片机最小系统
LCD1602液晶屏
电源供电电路
+5
K1
P1 2
R2
4.7K
Q1
S8 550
+5
P3 7
BUZ1
R3
470
LED1
声光报警
P2 1
1
2
3
4
S1
DHT11
+5
R4
10K
P1 7
温湿度采集
VCC2
1
X1
2
X2
3
GND
4
RST
5
IO
6
SCLK
7
VCC
8
U2
DS1302
X1
32.76 8 K
+5
12
S2
3.3V
R5
10K
R6
10K
R7
10K
+5
P2 6
P2 5
P2 7
时钟走时电路
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