2 layers99.8 × 99.8 mm
4 layers99.8 × 99.8 mm
SomaCombo
graysonarts/somaSociety's Obedience through Managed Audio
- Size
- 99.8 × 99.8 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 27
- Nets
- 63
- Pads
- 162
- Tracks, vias
- 5, 2
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 23 May 2025
- Updated
- 3 Oct 2026
Overview
SomaCombo is an open-source printed circuit board by graysonarts, from the graysonarts/soma repository on GitHub. It is a 4-layer board of 99.8 × 99.8 mm with 27 parts on 63 nets, routed with 5 tracks and 2 vias.
It is built around the C01. Its parts include 6 connectors, 3 resistors and 1 IC.
Main components
1Parts
27| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 4.7K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2 |
| 1 | 1.5 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3 |
| 1 | 3.3V I2C IN | Connector_PinHeader_1.27mm:PinHeader_1x04_P1.27mm_Vertical | J1 |
| 1 | 5V IN | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MPT-0,5-2-2.54_1x02_P2.54mm_Horizontal | J6 |
| 1 | B01 | Connector_PinHeader_1.27mm:PinHeader_1x03_P1.27mm_Vertical | G13 |
| 1 | B02 | Connector_PinHeader_1.27mm:PinHeader_1x03_P1.27mm_Vertical | G12 |
| 1 | B03 | Connector_PinHeader_1.27mm:PinHeader_1x03_P1.27mm_Vertical | G11 |
| 1 | B04 | Connector_PinHeader_1.27mm:PinHeader_1x03_P1.27mm_Vertical | G10 |
| 1 | C01 | Connector_PinHeader_1.27mm:PinHeader_1x03_P1.27mm_Vertical | G14 |
| 1 | C02 | Connector_PinHeader_1.27mm:PinHeader_1x03_P1.27mm_Vertical | G15 |
| 1 | C03 | Connector_PinHeader_1.27mm:PinHeader_1x03_P1.27mm_Vertical | G16 |
| 1 | C04 | Connector_PinHeader_1.27mm:PinHeader_1x03_P1.27mm_Vertical | G17 |
| 1 | C05 | Connector_PinHeader_1.27mm:PinHeader_1x03_P1.27mm_Vertical | G18 |
| 1 | C06 | Connector_PinHeader_1.27mm:PinHeader_1x03_P1.27mm_Vertical | G19 |
| 1 | C07 | Connector_PinHeader_1.27mm:PinHeader_1x03_P1.27mm_Vertical | G20 |
| 1 | C08 | Connector_PinHeader_1.27mm:PinHeader_1x03_P1.27mm_Vertical | G21 |
| 1 | C09 | Connector_PinHeader_1.27mm:PinHeader_1x03_P1.27mm_Vertical | G22 |
| 1 | C10 | Connector_PinHeader_1.27mm:PinHeader_1x03_P1.27mm_Vertical | G26 |
| 1 | C11 | Connector_PinHeader_1.27mm:PinHeader_1x03_P1.27mm_Vertical | G27 |
| 1 | C12 | Connector_PinHeader_1.27mm:PinHeader_1x03_P1.27mm_Vertical | G28 |
| 1 | HIGH Level Shifter | Connector_PinHeader_1.27mm:PinHeader_1x04_P1.27mm_Vertical | J5 |
| 1 | LED+ | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MPT-0,5-8-2.54_1x08_P2.54mm_Horizontal | J2 |
| 1 | LED- | TerminalBlock:TerminalBlock_Xinya_XY308-2.54-16P_1x16_P2.54mm_Horizontal | J3 |
| 1 | LOW Level Shifter | Connector_PinHeader_1.27mm:PinHeader_1x04_P1.27mm_Vertical | J4 |
| 1 | MCP23017_SP | Package_DIP:DIP-28_W7.62mm | U1 |
| 1 | ~ | CustomParts:Pico-W Socket | M1 |
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Questions
How big is the SomaCombo PCB?
It measures 99.8 × 99.8 mm and has 4 copper layers, 1.6 mm thick.
What parts does the SomaCombo use?
27 parts, built around the C01. 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 SomaCombo KiCad files?
From the graysonarts/soma repository on GitHub, at the commit this page was made from: the board is hardware/SomaCombo/SomaCombo.kicad_pcb and its schematic hardware/SomaAudio/SomaAudio.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the SomaCombo design in my own project?
Its repository states no licence, so its author keeps all rights: ask graysonarts before reusing the design.