11
2
2
3
3
4
4
D D
C C
B B
A A
Title
Number RevisionSize
A4
Date: 2/08/2024 Sheet of
File: C:\Users\..\Sheet1.SchDoc Drawn By:
GND
1
2
3
4
LED1
R1
2k2
2 1
D1
IN3 OUT 1
2
GND
U2 LM78L12ACZ/NOPB
1
2+
C3
1
2+
C4
GND
0.33uF 0.1uF
DS2
R3
33K
+15V +12V Vout
R2
2k2
LED2
21
D2
IN2 OUT 3
1
GND
U1 LM7912CT
1
2
+
C1
0.33uF
GND
1
2
+
C2
0.1uF
DS1
R4
33K
-15V -12V Vout
Power protection circuit 83
2
45
1
6
7
U3
LM6171BIN/NOPB
GND
R5
15k
12
+
C6
2.2uF
C5
0.01uF
GND
1 2
+C7
2.2uF
GND
TIA
C9
100nF R6
820R
GND
R7
2k2
R8
2k2 8
3
2
45
1
6
7
U4
LM6171BIN/NOPB
C10
12pF
GND
R10
4.7k
DC blocker
R9 4.7kGND
C15
12pF
C11
0.01uF
C14
0.01uF
12
+
C12
2.2uF
GND
GND
1 2
+C13
2.2uF
R11
2k2
R12
2k2 8
3
2
45
1
6
7
U5
LM6171BIN/NOPB
8
3
2
45
1
6
7
U6
LM6171BIN/NOPB
C16
12pF
GND
C21
12pF
R13 4.7kGND
R14
4.7k
C17
0.01uF
C20
0.01uF
12
+
C18
2.2uF
GND
1 2
+C19
2.2uF
GND
R15
10k
Sallen-key active filter
GND
D3
R16
100k
1 3
2
C22
0.01uF
C25
0.01uF
12
+
C23
2.2uF
1 2
+C24
2.2uF
GND
GND
Post-amplifier
1
2
3 SW1
D3C-2220
R17 180R
C26
150pF
GND
GND GND
C27
100pF
TP1
5010
R19
10k
1
2
3
GAIN1
IN- 2
IN+ 3
GND4
VOUT5
VS 6
BYPASS 7GAIN8
U7
LM386N-1/NOPB
Low pass filter
Low pass filter
Oscilloscope
Audio amplifier
GND
GND
GND GND
R18 15k
C28
47nF
R20
10R
C8
0.01uF
1 2
+C29
100uF
2
1
P2
22-27-2021
P1
Header 4
GND
Audio out
PIC101
PIC102
COC1 PIC201
PIC202
COC2
PIC301
PIC302
COC3
PIC401
PIC402
COC4
PIC501 PIC502
COC5
PIC601 PIC602
COC6
PIC701 PIC702
COC7
PIC801 PIC802
COC8
PIC901 PIC902
COC9
PIC1001
PIC1002
COC10
PIC1101 PIC1102
COC11
PIC1201 PIC1202
COC12
PIC1301 PIC1302
COC13
PIC1401 PIC1402
COC14
PIC1501
PIC1502
COC15
PIC1601
PIC1602
COC16
PIC1701 PIC1702
COC17
PIC1801 PIC1802
COC18
PIC1901 PIC1902
COC19
PIC2001 PIC2002
COC20
PIC2101
PIC2102
COC21
PIC2201 PIC2202
COC22
PIC2301 PIC2302
COC23
PIC2401 PIC2402
COC24
PIC2501 PIC2502
COC25
PIC2601
PIC2602
COC26
PIC2701
PIC2702
COC27
PIC2801
PIC2802
COC28
PIC2901 PIC2902
COC29
PID101 PID102
COD1
PID201 PID202
COD2
PID301
PID302
COD3
PIDS101
PIDS102 CODS1
PIDS201
PIDS202 CODS2 PILED101
PILED102
COLED1
PILED201
PILED202
COLED2
COP1
PIP201
PIP202
COP2
PIR101
PIR102
COR1
PIR201
PIR202
COR2
PIR301
PIR302
COR3
PIR401
PIR402
COR4
PIR501 PIR502
COR5
PIR601
PIR602
COR6
PIR701 PIR702
COR7
8 1 PIR802
COR8
PIR901 PIR902
COR9
PIR1001 PIR1002
COR10
PIR1101 PIR1102
COR11
PIR1201 PIR1202
COR12
PIR1301 PIR1302
COR13
PIR1401 PIR1402
COR14
PIR1501 PIR1502
COR15
PIR1601
PIR1602
PIR1603
COR16
PIR1701 PIR1702
COR17
PIR1801 PIR1802
COR18
PIR1901
PIR1902
PIR1903
COR19
PIR2001
PIR2002
COR20
PISW101
PISW102
PISW103
COSW1 PITP101
COTP1
PIU101
PIU102 PIU103
COU1
PIU201
PIU202
PIU203
COU2
PIU301
PIU302
PIU303
PIU304 PIU305
PIU306
PIU307
PIU308
COU3
PIU401
PIU402
PIU403
PIU404 PIU405
PIU406
PIU407
PIU408
COU4
PIU501
PIU502
PIU503
PIU504 PIU505
PIU506
PIU507
PIU508
COU5 PIU601
PIU602
PIU603
PIU604 PIU605
PIU606
PIU607
PIU608
COU6
PIU701
PIU702
PIU703
PIU704
PIU705
PIU706
PIU707 PIU708
COU7
Board Stack Report