2 layers83.3 × 65.3 mm
SimonShield
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46 parts14kMIT
2 layers55 × 71 mm
BIG MUFF
C0DE-Z/Ecstasis2a remake of the BIG MUFF V7
- Size
- 55 × 71 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 64
- Nets
- 37
- Pads
- 147
- Tracks, vias
- 307, 18
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 5 Aug 2026
- Updated
- 8 Oct 2026
Overview
BIG MUFF is an open-source printed circuit board by C0DE-Z, from the C0DE-Z/Ecstasis repository on GitHub. It is a 2-layer board of 55 × 71 mm with 64 parts on 37 nets, routed with 307 tracks and 18 vias.
It is built around the BC547. Its parts include 26 resistors, 14 capacitors, 6 diodes, 5 connectors and 4 transistors.
Main components
1README
README.mdEcstasis Mk2
to stand outside oneself
A Fuzz pedal based after the Electro-Harmonix Big Muff Pi V7 (Green Russian)
Powered by 9v battery or DC input using cheap and easy to source parts, trying to replacate the sound of the orginal somewhat closely.
Improvments from the Mk1
- Optmized track width for 9v powerline
- Fixxed Footprint for the 1/4 inch audio jacking being inverted
- Optimized Part location
- Lowered VIA count
- Added silkscreen prints to show what each pot does, and for what is in and out.
Parts
64| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 0.1uF | Capacitor_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm | C3, C5, C6, C10, C11, C12 |
| 4 | 100K | PCM_4ms_Resistor:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R8, R15, R20 |
| 4 | 470K | PCM_4ms_Resistor:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3, R10, R16, R19 |
| 4 | BC547 | PCM_Package_TO_SOT_THT_AKL:TO-92_Inline | Q1, Q2, Q3, Q4 |
| 3 | 10K | PCM_4ms_Resistor:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R12, R18, R22 |
| 3 | 12K | PCM_4ms_Resistor:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4, R11, R14 |
| 3 | 1N914 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D3, D4, D6 |
| 3 | 390 | PCM_4ms_Resistor:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R9, R17 |
| 3 | 500pF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C1, C4, C8 |
| 3 | ~ | PCM_fab:MountingHole_M2 | H1, H2, H3 |
| 2 | 0.047uF | Capacitor_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm | C7, C9 |
| 2 | 22K | PCM_4ms_Resistor:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R24, R25 |
| 2 | LOGO | LOGO | G***, G*** |
| 1 | |||
| 1 | 0.0039uF | Capacitor_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm | C13 |
| 1 | 0.01uF | Capacitor_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm | C14 |
| 1 | 1.5K | PCM_4ms_Resistor:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R7 |
| 1 | 100kB (SUSTAIN) | PCM_Potentiometer_THT_US_AKL:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | R5 |
| 1 | 100kB (TONE) | PCM_Potentiometer_THT_US_AKL:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | R26 |
| 1 | 100kB (VOLUME) | PCM_Potentiometer_THT_US_AKL:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | R23 |
| 1 | 1K | PCM_4ms_Resistor:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R6 |
| 1 | 1N5817 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1 |
| 1 | 1N914 | Diode_THT:D_DO-41_SOD81_P7.62mm_Horizontal | D5 |
| 1 | 2.7K | PCM_4ms_Resistor:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R21 |
| 1 | 22uF | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C2 |
| 1 | 39K | PCM_4ms_Resistor:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R13 |
| 1 | 9V | Connector_Wire:SolderWire-0.75sqmm_1x02_P4.8mm_D1.25mm_OD2.3mm | BT1 |
| 1 | 9V DC | Connector_BarrelJack:BarrelJack_Horizontal | J1 |
| 1 | IN | Custom_Footprints:J_6.35mm_NMJ4HCD2_Custom | J2 |
| 1 | LED | LED_THT:LED_D3.0mm | D2 |
| 1 | OUT | Custom_Footprints:J_6.35mm_NMJ4HCD2_Custom | J3 |
| 1 | PINHD_1x3_Female | Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Horizontal | J4 |
| 1 | PINHD_1x3_Male | Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Horizontal | J5 |
| 1 | Polyfuse | Fuse:Fuse_Bourns_MF-RHT100 | F1 |
| 1 | SW_3PDT_Footswitch | Custom_Footprints:SW_3PDT_Footswitch_9Pin_Custom | SW6 |
Questions
How big is the BIG MUFF PCB?
It measures 55 × 71 mm and has 2 copper layers, 1.6 mm thick.
What parts does the BIG MUFF use?
64 parts, built around the BC547. 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 BIG MUFF KiCad files?
From the C0DE-Z/Ecstasis repository on GitHub, at the commit this page was made from: the board is BIG_MUFF.kicad_pcb and its schematic BIG_MUFF.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the BIG MUFF design in my own project?
Its repository states no licence, so its author keeps all rights: ask C0DE-Z before reusing the design.
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