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2 layers19.8 × 100.1 mmPassive expander, the printed circuit board in 3D

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.md

Passive 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

Three of these expanders on a desk

The passive epander without a faceplate. It’s just 7 sockets on a pcb with 8 pins facing back away int he opposite direction

Parts

8
QtyValueFootprintReferences
7~Import Library:Socket-3.5mm THT-Thonkiconn PJ398SM-12J1, J2, J3, J4, J5, J6, J7
1Conn_02x04_Odd_EvenConnector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_VerticalJ8

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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