Voltage FoundryModular

Voltage Foundry Modular

Open-source Eurorack modules, forged in code and copper.

Voltage Foundry Modular designs and builds open-source Eurorack modules. Every one is real, buildable hardware, and the firmware-driven ones also ship as pixel-accurate VCV Rack plugins — the same firmware that runs on the metal runs inside Rack, so you can try them before you buy or build.

Browse the modules Online Shop (soon!) Get the plugin
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Hardware you can build

Every module is fully open hardware — schematics, panels and firmware are published so you can build, mod and calibrate your own.

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Try it in VCV Rack

The VCV Rack plugins are not reimplementations. They run the actual module firmware with the OLED emulated pixel for pixel.

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One plugin, one install

Every module with a Rack version is bundled into a single VCV plugin, kept in sync with each module's own repository. (Soon on VCV Library!)

Module catalog

Every module ships as open hardware, and the digital ones as a VCV Rack plugin too. Click any card for the full manual.

Clock Forge panel

Clock Forge

6HP Forge Series

Advanced clock generator and modulator with four flexible outputs.

Clock generatorClock modulatorEnvelope generatorEuclidean sequencerDigitalHardware clone
Read the manual →
Gravity Forge panel

Gravity Forge

6HP Forge Series

Dual physics-based generative sequencer — notes fall out of bouncing balls.

SequencerRandomDualDigitalHardware clone
Read the manual →
Chaos Forge panel

Chaos Forge

6HP Forge Series

Dual chaotic-attractor modulation source

ModulationRandomDualDigitalHardware clone
Read the manual →
Weave Forge panel

Weave Forge

6HP Forge Series

Two Turing Machines That Trade Bits

SequencerModulationRandomDualDigitalHardware clone
Read the manual →
Forge View panel

Forge View

6HP Forge Series

Oscilloscope, spectrum analyzer, X-Y display and tuner in one.

VisualTunerDualDigitalUtilityHardware clone
Read the manual →
Note Forge panel

Note Forge

6HP Forge Series

Dual CV quantizer with per-channel scales, envelopes and glide.

QuantizerEnvelope generatorDualDigitalHardware cloneUtility
Read the manual →
IRONMix panel

IRONMix

4HP Hardware only

Line-in mixer and headphone output stage in 4HP.

MixerOutputHeadphone ampLine levelAnalogUtility
Read the manual →

Get the VCV modules

The ForgeSeries catalog is bundled into a single VCV Rack plugin, Voltage Foundry Modular — coming to the VCV Library soon. Until then, build it from source or grab a release from the plugin repository and drop it into your VCV Rack plugins folder. ⓘ

VCV Library (soon!) Latest Release Sources on GitHub

Build the VCV version yourself

git clone https://github.com/VoltageFoundryMod/ForgeSeries
cd ForgeSeries
make vcv-install

Requires the VCV Rack SDK. See the repository README for details.

From the workbench

Tools built along the way to make the modules. Free, and they run in your browser — nothing to install.

Gingerbread - SVG to PCB

Front panel artwork into fabrication-ready PCBs.

Draw your Eurorack front panel as vector artwork, then turn it into a KiCad board ready for the fab house — no PCB editor wrangling in between.

Open Gingerbread

What it handles

  • Panel size in HP or millimetres, at 72, 96 or 2540 DPI
  • Round or slotted mounting holes, placed for you
  • Artwork mapped onto copper, mask and silkscreen layers
  • Round-trip through Inkscape for the detailed work
  • Mirrored export for back-layer artwork