1
1
2
2
3
3
4
4
5
5
6
6
D D
C C
B B
A A
Title
Number RevisionSize
B
Date: 2011-7-22 Sheet of
File: D:\2011
\..\SHEET1.SCHDOCDrawn By:
8
5
2
3
4
6
7
1
OP07AZ
U2
V+9
V-9
104
C3
104
C5
INPUT
4
7
3
6
5
1
28
LF398
U7
V+9
V-9
1K
R25
20K
R2
0.01uF
C16
control
4
7
3
6
5
1
28
LF398
U8
V+9
V-9
1K
R26
20K
R10
0.01uF
C17
control
8
5
2
3
4
6
7
1
OP07AZ
U1
V+9
V-9
104
C2
104
C4
10K
R3
10K
R1
1K
R5
8
5
2
3
4
6
7
1
OP07AZ
U4
V+9
V-9
104
C8
104
C11
10K
R13
10K
R9
8
5
2
3
4
6
7
1
OP07AZ
U3
V+9
V-9
104
C7
104
C9
10K
R12
10K
R8
2K
R14
100K
R27
104
C10
V+9
V-9
104
C12
104
C13
10K
R18
1K
R20
1K
R19
4148
D6
4148
D5
3.3V
10K
R17
V+9
V-9
104
C14
104
C15
10K
R22
1K
R24
1K
R23
4148
D8
4148
D7
3.3V
10K
R21
Port
Port
Port
10K
R6
10K
R16
+5V
+5V
Port
Port
2 3
1
TL431
Q1
4.7K
R7
2K
R11
5V
1uF
C18
0.75V
<=1.488V
4
CLK
3
D
2
1
Q
5
Q
6
CLR
PR
MM74HC74AJ
U9A
+5V
+5V
Port
0
1
3.3V
3.3V
4148
D3
4148
D1
4148
D4
4148
D2
1K
R4
1K
R15
104
C6
104
C1
8
3
2
4
1
LM393AN
U5A
5
6
7
84
LM393AN
U5B
