2 layers58 × 110 mm
2 layers64 × 32 mm
Attenuator multiple
shmoergh/moduleur222Fully analog DIY-friendly modular synth
- Size
- 64 × 32 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 7
- Nets
- 12
- Pads
- 34
- Tracks, vias
- 21, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 1 Jun 2025
- Updated
- 27 Oct 2026
Overview
Attenuator multiple is an open-source printed circuit board by shmoergh, from the shmoergh/moduleur repository on GitHub. It is a 2-layer board of 64 × 32 mm with 7 parts on 12 nets, routed with 21 tracks and 0 vias.
It is built around the SJ1-3554NG. It belongs with the audio and music boards of this library.
Main components
1README
modules/08-default-patch/README.mdHog Moduleur / Default Patch
An optional passive PCB which connects the modules of the Shmøergh Moduleur. This essentially creates a default patch which makes the Moduleur playable without patch cables.
How to Build
Module specific instructions
🐛 3D model bug in schematics
The current version of the 3D model has two bugs:
- It incorrectly uses dual row headers. Single row, long pin headers should be used on the BACK side of the PCB so that it can connect to the UI board through the holes on the Core board.
- The side of the ADSR+VCA1, ADSR+VCA2 and UTILS pin headers are wrong. All pin headers should be soldered on the BACK side of the PCB.
License
Open source licensed under CC BY-NC 4.0.
Feel free to fork, build, and tweak.
Latest module version
v1.0
Parts
7| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | SJ1-3554NG | Shmoergh_Custom_Footprints:CUI_SJ1-3554NG | J_IO1, J_IO2, J_IO3, J_IO4 |
| 2 | 100k | Shmoergh_Custom_Footprints:Potentiometer_Bourns_Single-PTV09A | RV_LVL1, RV_LVL2 |
| 1 | ~ | Shmoergh_Custom_Footprints:Gyeszno | U1 |
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Questions
How big is the Attenuator multiple PCB?
It measures 64 × 32 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Attenuator multiple use?
7 parts, built around the SJ1-3554NG. 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 Attenuator multiple KiCad files?
From the shmoergh/moduleur repository on GitHub, at the commit this page was made from: the board is accessories/multiples-attenuator/attenuator-multiple.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Attenuator multiple design in my own project?
Its repository states no licence, so its author keeps all rights: ask shmoergh before reusing the design.