Schematic

1
4
3
2
IN OUT
CNT
GND
Vin SW
SHDN
GND
FB
GND
GND
GND
GND
9V
9V
9V
LMC662 LMC662
220k100k
100k
22M
10k
1M
1u
1u
1u(50V)
1p
0.1u
10p
22M
22M
GND
1u(50V)
GND
1u
GNDGND
AUDIOJACK_4COND
NJM2831F
LM393SPSSOG8
LM393SPSSOG8
7.5k7.5k
GND
9V
GND
4700p
GND
100k
1u(50V)
GND
GND
X100-7SMD
1u
2.2u 2.2u
SDM10M45SD
SDM10M45SD
RB520S
0.1u(50v)
0.1u(50v)
0.1u(50v)
1M100k
GNDGND
GNDGND
GND
1u(50V)
GND
LT1651
9V
470
470
470
2.2u 2.2u
GND GND
GND
10u
2
3
1
U1A
6
5
7
U1B
84
R1R2
R3
R9
R5
R6
C1
C3
C4
C5
C6
C7
R10
R11
C9 C12
CN2
U2
P$2
P$3
P$1
U3A
P$6
P$5
P$7
U3B
P$8P$4
R15R16
C16
R20
C20
D1
P$1 P$2
P$3 P$4
P$5 P$6
JP2
C15
C25 C26
D10A D10B
D3
C27
C29
C28
R21R23
1
2
3
4
5
JP3
P$1
JP1
C2
U4
R18
R19
R4
C32 C33
L1