2 layers99.4 × 99.6 mm
GR Subscriber Line Interface Module
GadgetReboot/Phone_SLIM
POTS Telephone Subscriber Line Interface Module
112 parts62CC-BY-SA-4.0
2 layers54 × 65 mm
Big muff
vborgo/big_muffKicad big muff pcb
- Size
- 54 × 65 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 52
- Nets
- 29
- Pads
- 120
- Tracks, vias
- 256, 4
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 16 Mar 2025
- Updated
- 24 Jan 2026
Overview
Big muff is an open-source printed circuit board by vborgo, from the vborgo/big_muff repository on GitHub. It is a 2-layer board of 54 × 65 mm with 52 parts on 29 nets, routed with 256 tracks and 4 vias.
It is built around the BC550 and PJ-202A. Its parts include 23 resistors, 14 capacitors, 6 diodes, 4 transistors and 2 connectors.
Main components
2README
README.mdbig_muff
Kicad big muff pcb
Parts
52| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2, D3, D4, D6, D7 |
| 5 | 0.1u | Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm | C1, C3, C4, C12, C13 |
| 4 | 100k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R11, R14, R19, R21 |
| 4 | BC550 | Package_TO_SOT_THT:TO-92_Inline | Q1, Q2, Q3, Q4 |
| 3 | 0.68u | Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm | C6, C7, C8 |
| 3 | 100k | Potentiometer_THT:Potentiometer_Bourns_PTV09A-1_Single_Vertical | RV1, RV2, RV3 |
| 3 | 10k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R8, R13, R24 |
| 3 | 12k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R6, R10, R16 |
| 3 | 390 | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R3, R12, R17 |
| 3 | 470k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R1, R9, R15 |
| 3 | 470p | Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm | C2, C5, C9 |
| 1 | 0.01u | Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm | C11 |
| 1 | 1k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R7 |
| 1 | 1u | Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm | C14 |
| 1 | 2.2M | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R18 |
| 1 | 2.2k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R22 |
| 1 | 22k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R20 |
| 1 | 390k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R23 |
| 1 | 39k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R4 |
| 1 | 4.7p | Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm | C10 |
| 1 | 47k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R2 |
| 1 | Conn_01x04_Socket | Connector_PinHeader_2.00mm:PinHeader_1x04_P2.00mm_Vertical | J3 |
| 1 | PJ-202A | Connector_BarrelJack:BarrelJack_GCT_DCJ200-10-A_Horizontal | J1 |
Questions
How big is the Big muff PCB?
It measures 54 × 65 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Big muff use?
52 parts, built around the BC550 and PJ-202A. 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 vborgo/big_muff 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 vborgo before reusing the design.
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