1
2
3
4
A
B
C
D
4
3
2
1
D
C
B
A
1
2
74LS05
3
4
5
6
8
9
1
SDA
6
GND
2
SCL
3
Power control
4
work / NOT work
5
+5v permanent
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
25
13
LPT 1
1 k
4.7 k
0.1 mF
14 pin 74LS05
7 pin 74LS05
1
2
3
4
A
B
C
D
4
3
2
1
D
C
B
A
1
2
74LS05
3
4
5
6
8
9
1
SDA
6
GND
2
SCL
3
Power control
4
work / NOT work
5
+5v permanent
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
25
13
LPT 1
1 k
4.7 k
0.1 mF
14 pin 74LS05
7 pin 74LS05