Circuit diagram
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
D D
C C
B B
A A
FUSE1
500V 0.5A
C1
10uF
D1D2
140uA/1K
M
+
18.5
R21
10K
R31
200
R22
×10×1 ×1K 25
20K
R23
25uA
100K
R20
1M
R33
18V
YM1
4.9K
R0
×10K ×100K
200K
R24
2M
R25
3V
2.5mA
10A
-COM
V+
500
VR1
2.5
10V
250
0.25mA
1K
R7
1K
R6
40K
R4
8K
R5
150K
R3
10V 500V 250V 50V
OFF
500V250V50V
2K
R9
20
R12
250mA
10A&
0.018
R8
BZ
BZ
3V
10uF
C7
0.1uF
C8
0.1uF
C6
GND
K1
DC
AC
3
2
1
84
IC4A
TL062
1KR19
1M
R41
10K
R43
100K
R18
10K
R16
D3
1N4007
D4
1N4007
100K
R32
220K
R30
10K
R39
10K
VR3
100
C10
THR
6
OUT
3
RST
4
DISC
7
CVOLT
5
TRIG
2
VCC
8
GND
1
IC31
NE555D
10K
R37
0.022
C12
5.1K
R38
8
1
4
3
2
IC3A
LF272
D32
1N4148
D31
1N4148
GND
GND
5V
VCC
VCC
10K
R17
84
5
6
7
IC21B
LF272
10K
R28
9V
+
5V
GND
COM
FUSE2
500V 10A
0.002
R15
18V
YM2
48
5
6
7
IC4B
TL062
10K
R45
4
1
8
3
2
IC2A
TL062CD
84
7
5
6
IC2B
TL062CD
8
1
4
3
2
IC3A
TL062C
8 4
7
5
6
IC3B
TL062C
DCVA_OUT
GND
VR62K
R42
1M
VR2
10K
VR4
5K
R35
47K
R36
47K
+4.5V -4.5V
-4.5V
R44
1K
2.5V 0.05V 25mA
2
R13
DCVA_OUT
ACV
ACV
COM
GND
VCC
VCC
4.5V
1KR14
VCC
8
1
4
3
2
IC1A
LF353
100K
R34
100k
R33
4.5V
-4.5V
33uF
C51
Q1
9013
90K
R5
10M
R1
LED
LED0
Q3
9013
Q1
9012
100uF
C52
8
1
4
3
2
IC51A
LM358
91K
R7
20K
R8
3
2
1
Q4
9012
+
-
D1
1N4148
Vin Vout
GND
IC5 7550
84
7
5
6
2
IC51B
LM358D
2M
R2
820K
R3
D2
1N4148
90K
R4
130K
R6
100uF
C2
D51
1N4148
D51
1N4148
PORWER
0.5V
1.62M
R2B
1.58M
R2A
2.2M
R1A
6.8M
R1
0.25mA
200
R11
COM
GND
5V