

Passive expander
It’s 4hp and has 7 patch cable sockets and 8 pins on the back. One for each of the 7, plus a pin for connecting a ground that is sent to each of the sockets.
- Size
- 19.8 × 100.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 8
- Nets
- 8
- Pads
- 29
- Tracks, vias
- 44, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 5 Jul 2024
- Updated
- 6 Jul 2024
Overview
Passive expander is an open-source printed circuit board by oamodular, from the oamodular/passive-expander repository on GitHub, published under the CC-BY-SA-4.0 licence. It is a 2-layer board of 19.8 × 100.1 mm with 8 parts on 8 nets, routed with 44 tracks and 0 vias.
README
README.mdPassive expander for Eurorack
It’s 4hp and has 7 patch cable sockets and 8 pins on the back. One for each of the 7, plus a pin for connecting a ground that is sent to each of the sockets. We found it useful in working on Time Machine but this is also a handy tool for bringing any expander pins to the front of your system.
On one side of the faceplate the sockets are number 1 through 7. On the other it has labels specific to Time Machine. Meep morp


Parts
8| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | ~ | Import Library:Socket-3.5mm THT-Thonkiconn PJ398SM-12 | J1, J2, J3, J4, J5, J6, J7 |
| 1 | Conn_02x04_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J8 |
Questions
How big is the Passive expander PCB?
It measures 19.8 × 100.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Passive expander use?
8 parts. 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 Passive expander KiCad files?
From the oamodular/passive-expander repository on GitHub, at the commit this page was made from: the board is Passive Expander - Main Board/Passive Expander.kicad_pcb and its schematic Passive Expander - Main Board/Passive Expander.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Passive expander design in my own project?
Its repository publishes it under the CC-BY-SA-4.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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