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Angry squealing duck

dfd·angry_squealing_duck·kicad/duck.kicad_pcb

Angry squealing duck PCB layout, top view — open source board by dfd

About the Angry squealing duck PCB

Angry squealing duck is an open source PCB design by dfd, published on GitHub. It is a 2-layer board measuring 175 × 120 mm, with 105 components from 35 distinct parts.

Other key parts include the TL074 and LM13700. By type, the board carries 52 resistors, 25 capacitors, 14 diodes, 7 ICs and 3 connectors.

It belongs with the audio designs in this gallery.

From the project

A guitar pedal: a thick octave-fuzz feeding a dynamics-driven envelope band-pass ("Q-Tron") filter. Designed and voiced entirely in ngspice, validated against real-part models, ready for KiCad.

A guitar pedal: a thick octave-fuzz feeding a dynamics-driven envelope band-pass ("Q-Tron") filter. Designed and voiced entirely in ngspice, validated against real-part models, ready for KiCad.

Controls (4 knobs + 2 footswitches): - Volume — output level - Anger — fuzz amount / sustain (Big-Muff-style) - Squeal — up-octave level: CCW = none, ~noon = "ring on top", CW = octave-dominant blast - Quack — envelope band-pass intensity (ganged sweep depth + resonance Q) - Master true-bypass footswitch, and a dedicated Squeal (octave) footswitch (kick the octave in/out, Hoof-Reaper style)

Main components on the Angry squealing duck

TL074LM13700

Angry squealing duck bill of materials (BOM)

105 components, 35 distinct parts.

QtyPartRefs
6
TL074
U1, U2, U3, U4, U5, U6
1
LM13700
U7
2
AudioJack2
J1, J2
1
Barrel_Jack
J3
3
100k
RV1, RV2, RV3
1
100k
RV4
1
1N5817
D1
13
1N4148
D2, D3, D4, D5, D6, D7, D8, D9 +5
1
100u
C1
1
47u
C2
11
100n
C3, C4, C6, C8, C19, C20, C21, C22 +3
3
1.5n
C5, C7, C9
1
27n
C10
2
220n
C11, C12
1
47n
C13
1
12n
C14
1
1u
C15
2
10n
C16, C17
1
22n
C18
6
100k
R1, R2, R6, R9, R27, R28
Show 15 more
QtyPartRefs
4
1M
R3, R4, R7, R10
2
2.2k
R5, R13
2
12k
R8, R11
2
68k
R12, R47
16
10k
R14, R15, R16, R18, R21, R22, R23, R25 +8
2
4.7k
R17, R24
2
15k
R19, R20
1
3.3k
R26
5
22k
R29, R49, R50, R51, R52
2
1.5k
R30, R32
2
110k
R31, R33
1
6.8k
R41
1
39k
R42
2
47k
R43, R45
2
1k
R44, R46

Angry squealing duck design files

The KiCad project lives in the dfd/angry_squealing_duck repository on GitHub; these links point at the commit this page was built from.

Angry squealing duck: common questions

How big is the Angry squealing duck PCB?

The Angry squealing duck measures 175 × 120 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Angry squealing duck?

105 components, from 35 distinct parts. The full bill of materials is listed on this page.

Where can I download the Angry squealing duck design files?

From the dfd/angry_squealing_duck repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Angry squealing duck design in my own project?

The repository has no license, so all rights stay with dfd. Use it as a reference, and ask the author before reusing the design.

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