Sch
BOM
R1
1M
R2
1K
R3
47K
R4
47K
R5
100K
R6
100K
R7
4K7
R8
100K
R9
4K7
R10
100K
R11
100K
R12
220R
R13
CLR (2K2)
R14
CLR (2K2)
R15
15K
R16
150K
R17
10K
R18
1K
R19
22K
R20
4K7
R21
470K
R22
47K
R23
1K5
R24
10K
R25
100K
C1
47n
C2
47n
C3
1n
C4
10u elec
C5
10u elec
C6
10u elec
C7
10u elec
C8
10u elec
C9
10u elec
C10
15n
C11
100n
C12
10u elec
C13
10u elec
C14
100u elec
C15
10p
C16
1n
D1-2
1N34A
D3-4
LED
D5-6
1N34A
D7
1N4001
Q1-4
2N3904
TONE
100KB
VOL
100KB
SUST
100KB
SW1
DPDT