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B.O.M.

Resistors

Caps

Diodes

R1

1M

C1

47n

D1

1N4001

R2

10k

C2

1uF

D2

1n914

R3

470k

C3

6n8

Transistors

R4

10k

C4

100pF

Q1

MPSA18

R5

10k

C5

100pF

Q2

MPSA18

R6

47k

C6

6n8

Q3

MPSA18

R7

47k

C7

1uF

Q4

MPSA18

R8

47k

C8

10uF

IC 

R9

10k

C9

10uF

IC1

4558

R10

47k

C10

220n

IC2

NE570

R11

470R

C11

100pF

IC3

MN3005

R12

100k

C12

10uF

IC4

MN3101

R13

10k

C13

6n8

Trimmers

R14

10k

C14

82n

BIAS

20k

R15

10k

C15

330pF

CANCEL

10k

R16

10k

C16

1uF

CLOCK

1M

R17

10k

C17

1uF

Pots

R18

10k

C18

2n2

DELAY

1MB

R19

100k

C19

33n

FDBK

50kB

R20

100k

C20

1n

MIX

50kB

R21

100k

C21

39n

R22

10k

C22

330pF

R23

10k

C23

1uF

R24

10k

C24

220n

R25

10k

C25

100pF

R26

10k

C26

1uF

R27

10k

C27

1uF

R28

10k

C28

100n

R29

47k

C29

1uF

R30

22k

C30

100pF

R31

10k

C31

100uF

R32

10k

C32

100n

R33

10k

C33

10uF

R34

22R 1/4W

C34

22uF

R35

*see notes

R40

18k

R41

10k

R42

22k

Summary of Contents for Aquababy

Page 1: ...f you have frequency measurement on your DMM adjust the Clock trimmer to about 6 5kHz while probing either pin2 or pin4 of IC5 If you don t have this feature set the Clock trim half way up note this is when using a 9v supply Audio probe pin3 of IC3 while either strumming the guitar or send some audio through the input of the circuit Adjust the BIAS trimmer until you get delay passing The range ove...

Page 2: ...Layout Traces ...

Page 3: ...00k C12 10uF IC4 MN3101 R13 10k C13 6n8 Trimmers R14 10k C14 82n BIAS 20k R15 10k C15 330pF CANCEL 10k R16 10k C16 1uF CLOCK 1M R17 10k C17 1uF Pots R18 10k C18 2n2 DELAY 1MB R19 100k C19 33n FDBK 50kB R20 100k C20 1n MIX 50kB R21 100k C21 39n R22 10k C22 330pF R23 10k C23 1uF R24 10k C24 220n R25 10k C25 100pF R26 10k C26 1uF R27 10k C27 1uF R28 10k C28 100n R29 47k C29 1uF R30 22k C30 100pF R31 ...

Page 4: ...in 1uF 1 Film 25v min 1uF 7 Electrolytic 25v min 10uF 4 Electrolytic 25v min 22uF 1 Electrolytic 25v min 100uF 1 Electrolytic 25v min 1N4001 1 1n914 1 MPSA18 4 or other BJT 4558 1 NE570 1 MN3005 1 MN3101 1 20k 1 Bourns 3362p 10k 1 Bourns 3362p 1M 1 Bourns 3362p 1MB 1 Solder Lug 16mm 50kB 2 Solder Lug 16mm You can use either 20k or 25k for the trimmer if you cannot get a 22k You can use either NOS ...

Page 5: ...62p 1M https www mouser com ProductDetail Bourns 3362P 1 105LF qs sGAEpiMZZMvygUB3GLcD7kddhVJPyV2kST 8Lo8Gl 252B 2F8 3D 16mm Solder Lug pots http smallbear electronics mybigcommerce com alpha single gang 16mm solder terms linear audio taper If you want to build the Aquababy with modulation like I did see my build pic later in this doc this is the dual pot I used http smallbear electronics mybigcom...

Page 6: ...Wiring ...

Page 7: ...1590B Drill Guide 3 pots ...

Page 8: ...1590B Drill Guide 4pots If you are a real glutton for punishment and want to try the dual concentric pots for modulation ...

Page 9: ...clude a series resistor This is the wiring I used for the mod board I did use a 1550B instead of 1590B enclosure though I don t remember the exact value I used for the resistor It might have been 220k or small er The idea is to pick the right value so when the Depth is turned all the way down the modulation is essentially cut off To be clear I do not recommend trying modulation with the Aquababy u...

Page 10: ...9 5 4 7 5 1 84 5 0 5 3 88 6 4 7 6 1 83 6 4 38 6 4 72 7 4 7 7 3 03 7 4 27 7 4 25 8 9 41 8 1 84 8 0 59 8 0 59 9 1 84 10 3 1 11 3 1 12 1 84 13 9 41 14 1 84 15 1 84 16 0 9 One Spot 9 42vDC Current Draw 13mA Clock Frequency 6 44kHz at max Delay setting Clock frequency depends on where the Clock trim is set IC3 pin7 depends on where the Bias trim is set ...

Page 11: ...Schematic ...

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