2 layers62.5 × 44.5 mm
2 layers49.5 × 32.9 mm
Muscle module
Bee4Queer/project-caudal- Size
- 49.5 × 32.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 43
- Nets
- 41
- Pads
- 153
- Tracks, vias
- 251, 26
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 22 Nov 2025
- Updated
- 23 Nov 2025
Overview
Muscle module is an open-source printed circuit board by Bee4Queer, from the Bee4Queer/project-caudal repository on GitHub. It is a 2-layer board of 49.5 × 32.9 mm with 43 parts on 41 nets, routed with 251 tracks and 26 vias.
It is built around the ADC121C021CIMM. Its parts include 19 resistors, 16 capacitors, 4 ICs and 4 connectors.
Main components
1Parts
43| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 100nF | Capacitor_SMD:C_0402_1005Metric | C2, C4, C5, C6, C8, C9, C11, C12 |
| 6 | 5MΩ | Resistor_SMD:R_0603_1608Metric | R1, R2, R6, R9, R12, R13 |
| 4 | 3.3kΩ | Resistor_SMD:R_0402_1005Metric | R7, R8, R10, R11 |
| 4 | 5k | Resistor_SMD:R_0402_1005Metric | R14, R15, R16, R17 |
| 3 | 330kΩ | Resistor_SMD:R_0603_1608Metric | R3, R4, R5 |
| 2 | 22Ω | Resistor_SMD:R_0402_1005Metric | R20, R21 |
| 2 | 330nF | Capacitor_SMD:C_0603_1608Metric | C3, C7 |
| 2 | 4.7uF | Capacitor_SMD:C_0402_1005Metric | C13, C14 |
| 2 | 470pF | Capacitor_SMD:C_0603_1608Metric | C15, C16 |
| 2 | 820pF | Capacitor_SMD:C_0402_1005Metric | C1, C10 |
| 2 | AD8232 | Package_CSP:LFCSP-20-1EP_4x4mm_P0.5mm_EP2.6x2.6mm | U1, U4 |
| 2 | ADC121C021CIMM | Package_SO:MSOP-8_3x3mm_P0.65mm | U2, U3 |
| 1 | Conn_01x06_Socket | Connector_JST:JST_SH_BM06B-SRSS-TB_1x06-1MP_P1.00mm_Vertical | J5 |
| 1 | Left | Custom:Sinelink-DIN42802-3pin | J1 |
| 1 | Ref | Custom:Sinelink-DIN42802-3pin | J3 |
| 1 | Right | Custom:Sinelink-DIN42802-3pin | J2 |
Questions
How big is the Muscle module PCB?
It measures 49.5 × 32.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Muscle module use?
43 parts, built around the ADC121C021CIMM. 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 Muscle module KiCad files?
From the Bee4Queer/project-caudal repository on GitHub, at the commit this page was made from: the board is muscle-module/muscle-module.kicad_pcb and its schematic muscle-module/emg-section.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Muscle module design in my own project?
Its repository states no licence, so its author keeps all rights: ask Bee4Queer before reusing the design.
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