Sch BOM
R1
1M
R2
100K
R3
47K
R4
10K
R5
10K
R6
12K
R7
1K
R8
100K
R9
10K
R10
10K
R11
10K
R12
15K
R13
10K
R14
Jumper*
R15
10K
R16
10K
R17
1K
R18
10K
R19
120K
R20
220K
R21
120K
R22
220K
R23
4K7
R24
100K
R25
4K7
R26
4K7
R27
1K
R28
47K
R29
47K
R30
100K
R31
220K**
C1
100n
C2
47p
C3
47n
C4
1u
C5
1u
C6
1u
C7
2n2
C8
2n2
C9
100n
C10
330n
C11
22n
C12
100n
C13
100n
C14
100n
C15
10n
C16
Empty*
C17
1u
C18
1u
C19
22n
C20
10u elec
C21
4u7 elec
C22
100n
C23
47u elec
C24
100u elec
C25
47u elec
C26
100u elec
C27
100u elec
IC1
PT2399
IC2
OPA2134
IC3
LM358
U1
78L05
D1-2
1N4148
D3
1N5817
D4
LED
DEP
100KB
GAIN
100KB/TRIM
LVL
100KB
REG
100KA
SPD
50KB
TIM
50KB*
T1
10K TRIM
*Extended delay time mod - R14 10K, C16 10n, TIM 100KB. Repeats will have more noise.
**Missing from the board and needs to be hacked in. See later in doc.
You can use an external pot for gain if you like, but it’s best to set and forget with a trimmer.
Summary of Contents for AlluringEcho
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