aion ANUBIS User manual

ANUBIS SILICON FUZZ 1
PROJECT NAME
ANUBIS
BASED ON
EFFECT TYPE
PROJECT SUMMARY
DOCUMENT VERSION
Basic Audio Scarab Deluxe
An adaptation of the classic Tone Bender Mk. II circuit using silicon transistors and a Big Muff-style tone
control.
Fuzz / Distortion 1.0.0 (2021-02-19)
Actual size is 2.3” x 1.86” (main board) and 1.78” x 0.87” (bypass board).
BUILD DIFFICULTY
Easy

ANUBIS SILICON FUZZ 2
TABLE OF CONTENTS
1Project Overview 7Enclosure Layout
2Introduction & Usage 8Wiring Diagram
3-4 Parts List 9Licensing
5Schematic 9Document Revisions
6Drill Template
INTRODUCTION
The Anubis Silicon Fuzz is an adaptation of the Basic Audio Scarab Deluxe, first released in 2010 as the
successor to the original Scarab, which was in turn based on the Hot Silicon, a classic circuit in the DIY
community that adapts the Tone Bender Mk. II for silicon transistors.
The Scarab Deluxe added an input capacitor blend as well as an external bias control for the third
transistor. The original Scarab was discontinued after the Deluxe was released.
The Hot Silicon is also available from Aion FX as the Zircon Silicon Fuzz. The Zircon and Anubis projects
are very similar to each other, but just different enough that they couldn’t be built on the same PCB.
USAGE
The Anubis has the following controls:
• Body blends between two input capacitors, gradually adding pre-gain bass as it’s turned up.
• Gain controls the amount of gain in the transistor fuzz stage.
• Bias controls the bias of the Q3 transistor, from low gain all the way to gated and sputtery. (It’s best
set in the middle for normal operation.)
• Tone is a Big Muff-style balance control that pans between a low-pass filter (bass emphasis) and a
high-pass filter (treble emphasis).
• Volume is the overall output level.

ANUBIS SILICON FUZZ 3
PARTS LIST
This parts list is also available in a spreadsheet format which can be imported directly into Mouser for
easy parts ordering. Mouser doesn’t carry all the parts (most notably potentiometers) so the second tab
lists all the non-Mouser parts as well as sources for each.
View parts list spreadsheet →
PART VALUE TYPE NOTES
R1 150k Metal film resistor, 1/4W
R2 22k Metal film resistor, 1/4W
R3 10k Metal film resistor, 1/4W
R4 1k Metal film resistor, 1/4W
R5 10k Metal film resistor, 1/4W
R6 100R Metal film resistor, 1/4W
R7 47k Metal film resistor, 1/4W
R8 1k Metal film resistor, 1/4W
R9 750R Metal film resistor, 1/4W
R10 100R Metal film resistor, 1/4W
R11 10k Metal film resistor, 1/4W
R12 4k7 Metal film resistor, 1/4W
R13 10k Metal film resistor, 1/4W
R14 2k2 Metal film resistor, 1/4W
R15 100R Metal film resistor, 1/4W Power supply resistor. Not in original unit, but improves filtering and
lowers noise.
RPD 2M2 Metal film resistor, 1/4W Input pulldown resistor. Can be as low as 1M.
LEDR 4k7 Metal film resistor, 1/4W LED current-limiting resistor. Adjust value to change LED brightness.
C1 10n Film capacitor, 7.2 x 2.5mm
C2 10uF Electrolytic capacitor, 5mm
C3 100n Film capacitor, 7.2 x 2.5mm
C4 4.7uF Electrolytic capacitor, 4mm
C5 100n Film capacitor, 7.2 x 2.5mm
C6 8n2 Film capacitor, 7.2 x 2.5mm
C7 100n Film capacitor, 7.2 x 2.5mm
C8 100uF Electrolytic capacitor, 6.3mm
C9 100n MLCC capacitor, X7R
D1 1N5817 Schottky diode, DO-41
Q1 2N5088 BJT transistor, NPN, TO-92
Q2 2N5088 BJT transistor, NPN, TO-92
Q3 2N5088 BJT transistor, NPN, TO-92
Q4 2N5088 BJT transistor, NPN, TO-92

ANUBIS SILICON FUZZ 4
PARTS LIST, CONT.
PART VALUE TYPE NOTES
BIAS 25kB 16mm right-angle PCB mount pot
BODY 100kA 16mm right-angle PCB mount pot
GAIN 1kB 16mm right-angle PCB mount pot
TONE 50kB 16mm right-angle PCB mount pot
VOL. 100kA 16mm right-angle PCB mount pot
IN 1/4" stereo 1/4" phone jack, closed frame Switchcraft 112BX or equivalent.
OUT 1/4" mono 1/4" phone jack, closed frame Switchcraft 111X or equivalent.
DC 2.1mm DC jack, 2.1mm panel mount Mouser 163-4302-E or equivalent.
FSW 3PDT Stomp switch, 3PDT
ENC 125B Enclosure, die-cast aluminum Can also use a Hammond 1590N1.

SCHEMATIC
ANUBIS SILICON FUZZ 5
GND
2M2
1N5817
100uF
100kA
1kB
GND
50kB
100kA
+9V
100n
VA
10n
10uF
150k22k
VA
GND
10k1k
GND
VA
100n
10k
VA
100R
GND
47k
GND
4u7
1k
10k
GND
VA
100n
4k7
10k
2k2
8n2
GND
100n
GND
GND
100R
2N5088
2N5088
2N5088
2N5088
100R
GND
25kB
VA
750R
RPD
D1
C8
BODY
1
2
3
GAIN
1
2
3
TONE
1
2
3
VOLUME
1
2
3
IN
OUT
C9
C1C2
R1R2
R3R4
C3
R5R6
R7
C4
R8
R11
C5
R12
R13
R14
C6 C7
R15
Q1
Q2
Q3
Q4
R10
BIAS
1
2
3
R9
GND

ANUBIS SILICON FUZZ 6
DRILL TEMPLATE
Cut out this drill template, fold the edges and tape it to the enclosure. Before drilling, it’s recommended
to first use a center punch for each of the holes to help guide the drill bit.
Ensure that this template is printed at 100% or “Actual Size”. You can double-check this by measuring
the scale on the printed page.
Top jack layout assumes the use of closed-frame jacks like the Switchcraft 111X. Open-frame jacks will
not fit in layouts with 5 or more knobs due to the placement of the DC jack.
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.
0 1 2
CM
0 1
INCH
x: -0.775, y: +1.71 x: +0.775, y: +1.71
ø9/32” ø9/32”
x: -0.775, y: +0.41
ø9/32”
x: 0, y: +1.71
ø9/32”
x: +0.775, y: +0.41
ø9/32”
x: 0, y: -1.20
ø15/32”
x: -0.775, y: -1.20
ø5/16”
CENTER (0,0)
125B
GAINTONEVOLUME
BODYBIAS
FOOTSWITCHLED
ø3/8” ø1/2”
0.385”
0.625” 0.625”
ø3/8”
OUT DC IN

ANUBIS SILICON FUZZ 7
ENCLOSURE LAYOUT
Enclosure is shown without jacks. See next page for jack layout and wiring.
125B

ANUBIS SILICON FUZZ 8
WIRING DIAGRAM
125B
IN +VGND N.C. N.C. OUT
PCB
IN
GND +V +V JACK GND JACK
OUTIN
GND GND PCB
OUT

ANUBIS SILICON FUZZ 9
LICENSE & USAGE
No direct support is offered for these projects beyond the provided documentation. It’s assumed
that you have at least some experience building pedals before starting one of these. Replacements and
refunds cannot be offered unless it can be shown that the circuit or documentation are in error.
All of these circuits have been tested in good faith in their base configurations. However, not all the
modifications or variations have necessarily been tested. These are offered only as suggestions based
on the experience and opinions 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 its source.
(In other words: you don’t have to go out of your way to advertise the fact that you use these PCBs, but
please don’t go out of your way to hide it. The guitar effects industry needs more transparency, not less!)
DOCUMENT REVISIONS
1.0.0 (2021-02-19)
Initial release.