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SeniorProj distortion pedal

tomregpala·seniorProj-distortion-pedal·hardware/kicad/SeniorProj.kicad_pcb

SeniorProj distortion pedal PCB layout, top view — open source board by tomregpala

About the SeniorProj distortion pedal PCB

SeniorProj distortion pedal is an open source PCB design by tomregpala, published on GitHub under the Custom license license. It is a 2-layer board measuring 55 × 87 mm, with 63 components from 27 distinct parts.

Other key parts include the TL061. By type, the board carries 25 resistors, 15 capacitors, 8 transistors, 7 diodes and 2 ICs.

It belongs with the audio designs in this gallery.

From the project

Two-layer PCB implementing a JFET noise-gated distortion circuit in a 1590B enclosure. KiCad.

A two-layer PCB implementation of a JFET-gated distortion circuit for electric guitar, redesigned to fit a standard 1590B pedal enclosure.

The underlying circuit is not mine. It comes from Almqvist and Nordberg's 2019 thesis, Noise-free distortion pedal for electric guitars: Designing and constructing a unique distortion pedal for live playing guitarists. My contribution is the PCB: shrinking the original layout to enclosure dimensions, arranging the I/O and potentiometer connections for practical wiring, and taking the design through to fabrication outputs.

SeniorProj distortion pedal, from the project README
From the project README

Main components on the SeniorProj distortion pedal

TL061

SeniorProj distortion pedal bill of materials (BOM)

63 components, 27 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
TL061
U1, U2
2
BC547
Q1, Q2
1
MMBF4393
BF545A
Q3
3
MMBFJ113
2N3819
Q4, Q6, Q8
2
MMBF4393
2N3819
Q5, Q7
1
Jack-DC
DCIN1
1
RC4558
OPAMP_Drive_Tone1
2
R_Potentiometer
Pot_Drive1, Pot_Sensitivity1
2
R_Potentiometer
Pot_Level1, Pot_Tone1
7
1N4148
D1, D2, D3, D4, D5, D6, D7
1
0.022U
0.022u
C1
1
0.01U
0.01u
C2
2
0.047U
0.047u
C3, C4
7
1u
C5, C7, C9, C11, C12, C13, C15
2
0.015U
0.015u
C6, C8
1
0.1U
0.1u
C10
1
0.68U
0.68u
C14
1
470
R1
1
33K
33k
R2
2
4.7K
4.7k
R3, R6
Show 7 more
QtyPartRefs
5
10K
10k
R4, R5, R8, R12, R14
1
470K
470k
R7
7
1k
R9, R15, R16, R20, R22, R24, R26
3
100K
100k
R10, R11, R23
2
1M
R13, R21
1
22K
22k
R19
2
220K
220k
R25, R27

SeniorProj distortion pedal design files

The KiCad project lives in the tomregpala/seniorProj-distortion-pedal repository on GitHub; these links point at the commit this page was built from.

SeniorProj distortion pedal: common questions

How big is the SeniorProj distortion pedal PCB?

The SeniorProj distortion pedal measures 55 × 87 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the SeniorProj distortion pedal?

63 components, from 27 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the SeniorProj distortion pedal design files?

From the tomregpala/seniorProj-distortion-pedal repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the SeniorProj distortion pedal design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

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