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SCHEMATIC

ANDROMEDA DELUXE BOOST / OVERDRIVE

7

IN

OUT

1N914

1N

41

48

1N5817

100uF

50kB

25kB

50

kA

25kB

250kA

50kB

+9V

100n

GND

33k

1M

3k

3

2k7

10

k

10k

13

k

GND

47uF

VB

GND

VA

VB

VA

2N5486

GND

GND

68

n

22n

GND

VA

GND

150pF

1k2

82

0R

22

0n

82n

GND

1k

5

2u2

GND

2k

2

220n

GND

1u

F

12k

2n7

10

R

39k

GND

GND

82n

12

k

1n

GND

GND

10k

1uF

22n

5k

1

43

k

VB

27n

GND

10

0n

8n

2

2k2

BC549C

15

0k

VB

VA

3k

3

GND

1k2

10R

10

R

22k

3k

3

10

0R

68n

10

0R

BC549C

1k2

2n

7

10

0k

10

k

VB

VA

GND

1n

1uF

10k

GND

4k7

8n2

GND

VA

GND

22k

4n7

5k1

82n

1k

1uF

GND

1k2

1u

F

GND

15

0k

10

0n

GND

15

0k

VB

2u

2

15

0k

470R

47uF

GND

GND

GND

D1

C30

1

2

3

SPECTRUM

1

2

3

LO_CUT

LE

VE

L

1

2

3

1

2

3

ODC

1

2

3

DRIVE

MID

1

2

3

C31

R1

R2

R3

R4

R5

R38

R3

9

C28

Q1

C1

C2

IC1A

2

3

1

IC1B

6

5

7

8

4

C3

D2

D3

D4

D5

R6

R7

C5

C4

R8

C6

R9

C7

C8

R10

C9

R1

1

R12

D6

D7

C10

R1

3

C11

R14

C12

C13

R1

5

R2

2

C14

C1

5

C1

6

R18

Q2

R1

9

R2

0

R21

R17

R1

6

R30

R2

3

R2

4

C17

R2

5

Q3

R26

C1

8

R2

7

R2

8

C1

9

C20

R29

R31

C21

IC2A

2

3

1

IC2B

6

5

7

8

4

R32

C22

R33

C23

R3

4

C24

R35

C2

5

R3

6

C2

6

R3

7

C2

7

R4

0

R41

C29

Summary of Contents for ANDROMEDA DELUXE

Page 1: ...ee new controls and a number of other small refinements Overdrive 1 0 1 2021 12 17 BUILD DIFFICULTY Intermediate Actual size is 2 3 x 2 42 main board and 1 78 x 0 86 bypass board This documentation is for the Deluxe version of the project Please make sure your PCB matches the above image a larger board with six knobs before proceeding since the part numbering is different The original Andromeda is...

Page 2: ...ixes the bass forward tone of the original a midrange control that can boost or cut and an overdrive de compress ODC control that gradually adds higher threshold clipping diodes in the soft clipping stage Each of the three knobs can be set to a position that emulates the original ODR 1 so the core circuit is the same change despite all the added features The Andromeda Deluxe is based on the audio ...

Page 3: ...istor 1 4W R9 2k2 Metal film resistor 1 4W R10 12k Metal film resistor 1 4W R11 10R Metal film resistor 1 4W R12 39k Metal film resistor 1 4W R13 12k Metal film resistor 1 4W R14 10k Metal film resistor 1 4W R15 5k1 Metal film resistor 1 4W R16 10R Metal film resistor 1 4W R17 10R Metal film resistor 1 4W R18 2k2 Metal film resistor 1 4W R19 150k Metal film resistor 1 4W R20 3k3 Metal film resisto...

Page 4: ...Film capacitor 7 2 x 2 5mm C5 220n MLCC capacitor X7R C6 2 2uF Film capacitor 7 2 x 5mm C7 220n Film capacitor 7 2 x 2 5mm C8 1uF Film capacitor 7 2 x 3 5mm C9 2n7 Film capacitor 7 2 x 2 5mm C10 82n Film capacitor 7 2 x 2 5mm C11 1n Film capacitor 7 2 x 2 5mm C12 1uF Film capacitor 7 2 x 3 5mm C13 22n Film capacitor 7 2 x 2 5mm C14 27n Film capacitor 7 2 x 2 5mm C15 100n Film capacitor 7 2 x 2 5mm...

Page 5: ...JFET N channel TO 92 Substitute Original uses 2N5486 Q2 2N5088 BJT transistor NPN TO 92 Substitute Original uses BC549C Q3 2N5088 BJT transistor NPN TO 92 Substitute Original uses BC549C IC1 RC4558P Operational amplifier DIP8 IC1 S DIP 8 socket IC socket DIP 8 IC2 RC4558P Operational amplifier DIP8 IC2 S DIP 8 socket IC socket DIP 8 DRIVE 250kA SPECT 50kB Original uses center detent but this is no...

Page 6: ...le in through hole format This PCB uses a hybrid through hole SMD outline for each JFET An extra G gate pad is included to accommodate surface mount devices without the need for adapters SMD JFETs should be oriented as follows All surface mount JFETs use the same pinout so this configuration will fit any type that we re aware of However always check the datasheet if you re uncertain they re diffic...

Page 7: ... 100R 68n 100R BC549C 1k2 2n7 100k 10k VB VA GND 1n 1uF 10k GND 4k7 8n2 GND VA GND 22k 4n7 5k1 82n 1k 1uF GND 1k2 1uF GND 150k 100n GND 150k VB 2u2 150k 470R 47uF GND GND GND D1 C30 1 2 3 SPECTRUM 1 2 3 LO_CUT LEVEL 1 2 3 1 2 3 ODC 1 2 3 DRIVE MID 1 2 3 C31 R1 R2 R3 R4 R5 R38 R39 C28 Q1 C1 C2 IC1A 2 3 1 IC1B 6 5 7 8 4 C3 D2 D3 D4 D5 R6 R7 C5 C4 R8 C6 R9 C7 C8 R10 C9 R11 R12 D6 D7 C10 R13 C11 R14 C...

Page 8: ...ike the Switchcraft 111X If you d rather use open frame jacks please refer to the Open Frame Jack Drill Template for the top side LED hole drill size assumes the use of a 5mm LED bezel available from several parts suppliers Adjust size accordingly if using something different such as a 3mm bezel a plastic bezel or just a plain LED ø3 8 ø1 2 0 385 0 625 0 625 x 0 775 y 1 71 x 0 775 y 1 71 ø9 32 ø9 ...

Page 9: ...ANDROMEDA DELUXE NATURAL OVERDRIVE 9 ENCLOSURE LAYOUT Enclosure is shown without jacks See next page for jack layout and wiring 125B ...

Page 10: ...ANDROMEDA DELUXE NATURAL OVERDRIVE 10 WIRING DIAGRAM 125B IN V GND NC NC OUT PCB IN GND V V JACK GND JACK OUT IN GND GND PCB OUT ...

Page 11: ...pinions of others Projects may be used for commercial endeavors in any quantity unless specifically noted No attribution is necessary though a link back is always greatly appreciated The only usage restrictions are that 1 you cannot resell the PCB as part of a kit without prior arrangement and 2 you cannot goop the circuit scratch off the screenprint or otherwise obfuscate the circuit to disguise ...

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