Took a short break from building synthesizer modules to design this simple utility PCB for breadboard prototyping.

It’ll let you connect standard Eurorack 10-pin IDC power supplies on to a breadboard. It also has an option to use JST XH2.56 3-pin connectors–which I use for my own personal builds.

Euro2breadboard v1.0


Bill of materials

#ValueTypePart #
202x05 MalePin Connectors
201x05 MalePin Connectors
1JST-XH 1x03Socket Connector
1IDC 2x05Socket Connector
1Toggle SwitchOn-On DPDTMTS-202


The circuit is composed of an on/off switch, indicator LEDs for positive and negative rails, some bulk capacitors, 2.54 spaced pin connectors, and power connector sockets.

For the power conector socket, you may chose between a JST XH2.54 connector and standard eurorack 10-pin IDC connector sockets.


PCB shops use Gerber files for etching copper traces, printing lables, drilling holes, and other manufacturing details. You can download my zipped files for a version you like and upload those into their website.

My PCBs in the MiniSynth series were sponsored by PCBWay – a great option for prototyping. Use their Quick-order PCB tool to get an instant quote on the files.

You can also go to the PCBWay community page to order the PCBs directly from them: euro2breadboard v1.1


v1.1 - Quick fixes (Unverified)

This version fixes issues found in the initial release.

Schematicseuro2breadboard 1.1.pdf
Gerber Fileseuro2breadboard
v1.0 - Initial release

This is the first release of the module.


Watch me build and talk about this on Youtube:


This module has definitely saved me some space on my workbench. The toggle switch also means that I don’t have to unplug and wear down some wires when troubleshooting.

A photo of my euro2breadboard module while prototyping an LFO. It's connected to my MiniSynth's power supply.

Let me know if you’ve built it! Tag me on IG @benjiaomodular.