HardLabs

Tonemachine

bubbajfett·kicad-guitar-pedals·Distortion/tonemachine/tonemachine.kicad_pcb

Tonemachine PCB layout, top view — open source board by bubbajfett

About the Tonemachine PCB

Tonemachine is an open source PCB design by bubbajfett, published on GitHub under the CC0-1.0 license. It is a 2-layer board measuring 58 × 42.1 mm, with 47 components from 23 distinct parts.

By type, the board carries 22 resistors, 13 capacitors, 4 transistors, 4 diodes, 1 connector and 1 switch.

It belongs with the audio designs in this gallery.

From the project

collection of guitar pedal PCB layouts in kicad

Verified, but possible issue with tone knob.

Changed font size, going to try to run these at jlpcb, and the size I've been using is below their minimum.

Original schematic used did not include a 100u electrolytic on the 9v line, but the tagboardeffects build did, so I added this into the layout. I bodged this onto the underside of the board.

The transistors used in the build were 2n3904. And for the germanium diodes, BAT42 were used. Reading the discussions online about this, the choice of diode matters more here than most. The sound of this is pretty cool. With the octave switch closed…

Tonemachine bill of materials (BOM)

47 components, 23 distinct parts.

QtyPartRefs
4
2N3904
Q1, Q2, Q3, Q4
1
Conn_01x04_Pin
J1
2
50KB
RV1, RV2
1
SW_SPST
SW1
4
GE
D1, D2, D3, D4
2
100n
C1, C2
1
1n
C3
7
10u
C4, C5, C6, C7, C8, C9, C12
1
3n
C10
1
47n
C11
1
100u
C13
1
1M
R1
3
47K
R2, R7, R19
1
1k
R3
3
4K7
R4, R5, R18
5
100K
R6, R8, R9, R10, R11
1
220R
R12
2
10K
R13, R21
1
150K
R14
2
15K
R15, R16
Show 3 more
QtyPartRefs
1
22K
R17
1
470K
R20
1
1K5
R22

Tonemachine design files

The KiCad project lives in the bubbajfett/kicad-guitar-pedals repository on GitHub; these links point at the commit this page was built from.

Tonemachine: common questions

How big is the Tonemachine PCB?

The Tonemachine measures 58 × 42.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Tonemachine?

47 components, from 23 distinct parts. The full bill of materials is listed on this page.

Where can I download the Tonemachine design files?

From the bubbajfett/kicad-guitar-pedals repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Tonemachine design in my own project?

Yes, under the terms of its CC0-1.0 license, which bubbajfett chose for the repository.

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