2 layers199.4 × 50.8 mm
Nixie board
vascofazza/cloxie_nixie_clock
Schematics and code for Cloxie: my Nixie Tube Clock.
85 parts17GPL-3.0
2 layers81.3 × 62.4 mm
Fuzz pedal 11
matjutras/faultfinderEducational electronics trainer: auto-generated schematics and 3D PCB views where you find an injected fault using a simulated multimeter, backed by real KiCad imports and ngspice simulation.
- Size
- 81.3 × 62.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 82
- Nets
- 47
- Pads
- 191
- Tracks, vias
- 228, 0
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 7 Sep 2026
- Updated
- 7 Sep 2026
Overview
Fuzz pedal 11 is an open-source printed circuit board by matjutras, from the matjutras/faultfinder repository on GitHub. It is a 2-layer board of 81.3 × 62.4 mm with 82 parts on 47 nets, routed with 228 tracks and 0 vias.
It is built around the MPSA42. Its parts include 31 resistors, 17 capacitors, 11 diodes, 4 transistors and 4 switches. It belongs with the audio and music boards of this library.
Main components
1README
README.mdFaultFinder
See CLAUDE.md for architecture and conventions.
Backend
cd backend
python3 -m venv .venv && .venv/bin/pip install -r requirements.txt
.venv/bin/uvicorn app.main:app --reload
.venv/bin/pytest -vRequires ngspice on PATH (sudo apt-get install ngspice) and kicad for
kicad-cli (sudo apt-get install kicad).
map.json and faults.json under each devices/*/ are generated, not
committed (see CLAUDE.md) — after a fresh checkout, regenerate them once per
device:
curl -X POST http://localhost:8000/api/devices/voltage_divider_01/importFrontend
cd frontend
npm install
npm run dev
npm testParts
82| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R5, R11, R17, R19, R24 |
| 5 | 1N914 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2, D3, D4, D5 |
| 5 | 47n | Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C4, C6, C7, C12, C14 |
| 4 | 100k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R9, R14, R21 |
| 4 | 470k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3, R10, R15, R22 |
| 3 | 180R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4, R12, R16 |
| 3 | 2N5089 | CircleCircuits:TO-92_Inline_Wide | Q2, Q3, Q4 |
| 3 | 470p | Capacitor_THT:C_Rect_L7.2mm_W4.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C2, C5, C8 |
| 3 | Ger. | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D6, D7, D8 |
| 2 | 0.1u | Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C1, C9 |
| 2 | 100k | Potentiometer_THT:Potentiometer_Vishay_T73YP_Vertical | R26, R27 |
| 2 | 10n | Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C10, C11 |
| 2 | 2.2k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R18, R23 |
| 2 | 6.2k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R8, R13 |
| 2 | B100k | CircleCircuits:Potentiometer_Alpha_16mm_angled | R6, R20 |
| 2 | Red LED | LED_THT:LED_D5.0mm | D9, D10 |
| 2 | SPDT on-off-on | CircleCircuits:SW_SPDT_Lugs_Round | SW1, SW2 |
| 1 | 0.47u | Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C3 |
| 1 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R7 |
| 1 | 1u | Capacitor_THT:C_Rect_L7.2mm_W3.0mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C13 |
| 1 | 2.54 pin header to Footswitch | CircleCircuits:SolderWire-0.5sqmm_1x02_P2.54mm_D0.9mm_OD2.1mm | SW6 |
| 1 | 2M | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R0 |
| 1 | 390k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R31 |
| 1 | 39k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 1 | 4k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R29 |
| 1 | 5 pin header | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J1 |
| 1 | 680p | Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C16 |
| 1 | 6n8 | Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C15 |
| 1 | ? | CircleCircuits:Potentiometer_Alpha_16mm_angled | RV1 |
| 1 | ? | Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C17 |
| 1 | A250k | CircleCircuits:Potentiometer_Alpha_16mm_angled | R25 |
| 1 | B25k | Potentiometer_THT:Potentiometer_Vishay_T73YP_Vertical | R30 |
| 1 | In | Connector_Wire:SolderWire-0.5sqmm_1x01_D0.9mm_OD2.1mm | H1 |
| 1 | JST connector 2 pin | CircleCircuits:Connector_Header_Switch | Switch-Header1 |
| 1 | JST connector 2 pin | CircleCircuits:Connector_Header_DC | DC-Header1 |
| 1 | LED 5mm | LED_THT:LED_D3.0mm | D11 |
| 1 | LOGO | CircleCircuits:Logo_circlecircuits_13mm_silk | G*** |
| 1 | MPSA42 | CircleCircuits:TO-92_Inline_Wide | Q1 |
| 1 | Out | Connector_Wire:SolderWire-0.5sqmm_1x01_D0.9mm_OD2.1mm | H2 |
| 1 | SPDT | CircleCircuits:SW_SPDT_Lugs_Round | SW4 |
| 1 | Val | CircleCircuits:Switch_Alpha_SF17010F-0302-21R-L.step | Ref |
The 75 most common of 82 parts.
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Questions
How big is the Fuzz pedal 11 PCB?
It measures 81.3 × 62.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Fuzz pedal 11 use?
82 parts, built around the MPSA42. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Fuzz pedal 11 KiCad files?
From the matjutras/faultfinder repository on GitHub, at the commit this page was made from: the board is devices/fuzz_pedal_11/fuzz_pedal_11.kicad_pcb and its schematic devices/battery_protection_09/battery_protection_09.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Fuzz pedal 11 design in my own project?
Its repository states no licence, so its author keeps all rights: ask matjutras before reusing the design.