2 layers223.5 × 160 mm
2 layers30.5 × 68.6 mm
Modular Synths for Everyone
- Size
- 30.5 × 68.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 4
- Nets
- 12
- Pads
- 20
- Tracks, vias
- 2, 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 4 Oct 2024
- Updated
- 25 Oct 2026
Overview
Blank is an open-source printed circuit board by bread-modular, from the bread-modular/bread-modular repository on GitHub, published under the MIT licence. It is a 2-layer board of 30.5 × 68.6 mm with 4 parts on 12 nets, routed with 2 tracks and 2 vias.
It belongs with the audio and music boards of this library.
README
README.mdBread Modular
An open-source hardware modular synthesizer format designed to be minimalistic and cost-effective: USB-powered, breadboard-friendly, with analog/digital modules and MIDI alongside CV & Gate.
Find your starting point
- Build or explore: modules, specification, common parts.
- Set up KiCad libraries: workspace/library setup. Projects
use the shared
opt/fp-lib-table; initialization copies local submodules rather than cloning them. - Check/export/source parts: KiCad toolkit.
Canonical tools, JLCPCB utilities and skills live under
opt/kicad-tools/.
KiCad quick start
python3 -B opt/kicad-tools/kicad_tools.py --help
python3 -B opt/kicad-tools/kicad_tools.py doctor
python3 -B opt/kicad-tools/kicad_tools.py export --helpPython + installed KiCad CLI; no extra packages for core tools. Private checks,
Gerber/BOM/CPL export, native netlist helpers and read-only sourcing have
distinct requirements and safety boundaries.
Exports are not electrical/release/order approval; keep frozen module scripts
and production designs untouched. Historical opt/kicad-jlcpcb and
.agents/skills/{kicad-workflow,jlcpcb-assembly} resolve through
relative compatibility symlinks.
Agents: start with the KiCad workflow skill or assembly skill, then actual CLI help.
Project references
Module catalog · Modular MIDI · PCB assembly
- Standalone exporter / native part-number setup
- Sourcing, audits and passive planning
- 32bit-5v sourcing / release HOLD
- 16bit-5v sourcing HOLD evidence
Project image and full feature overview
- Modular design: Just like Eurorack.
- USB-powered: It can be portable.
- Minimal design: Cost-effective.
- Modular MIDI support: Communicate between modules; CV & Gate still supported.
- Analog and digital signal paths: It’s your choice.
- Diverse built-in modules: A wide range of pre-designed modules.
- Configurable digital modules: Voice and CV using AtTiny 1616 or ESP32.
- Fully open source: Schematics, PCB designs and code.
- Ease of customization: Create modules tailored to your needs.
- No case required: Use directly on a breadboard or a simple base module.
Parts
4| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | Conn_01x05_Pin | BreadModular_MISC:Power_Connector | GND1, V_SUPPLY1 |
| 2 | Conn_01x05_Socket | Connector_PinSocket_2.54mm:PinSocket_1x05_P2.54mm_Vertical | INPUT1, OUTPUT1 |
Questions
How big is the Blank PCB?
It measures 30.5 × 68.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Blank use?
4 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 Blank KiCad files?
From the bread-modular/bread-modular repository on GitHub, at the commit this page was made from: the board is modules/blank/blank.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Blank design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
More from bread-modular/bread-modular
12- 4 layers91.4 × 68.6 mm
- 2 layers30.5 × 68.6 mm
- 2 layers30.5 × 68.6 mm
- 4 layers30.5 × 68.6 mm
- 2 layers30.5 × 68.6 mm
- 4 layers30.5 × 68.6 mm
- 4 layers30.5 × 68.6 mm
- 2 layers30.5 × 68.6 mm
- 2 layers30.5 × 68.6 mm
- 2 layers84.3 × 74 mm
- 2 layers30.5 × 68.6 mm
Similar boards
- 2 layers18.5 × 26 mm
24g2usb rp2350zero
joypad-ai/joypad-os
Universal controller firmware for building adapters, dongles, and custom controllers.
4 parts1.7kApache-2.0 - 2 layers116 × 33 mm
- 2 layers19 × 18 mm
Daughter board
hackclub/OnBoard
💡 Join 1,000 teenagers and make your first PCB with a $100 grant!
4 parts915 - 2 layers24.8 × 24.8 mm
Nrf24 breakout
tardate/LittleArduinoProjects
a collection of "Little Electronic & Arduino Projects", most involving electronics or an Arduino in one way or another!
4 parts803MIT - 2 layers26 × 20 mm
Cap chain
drandyhaas/KiCadRoutingTools
A set of Python/Rust tools to aid routing in KiCad
4 parts744MIT - 2 layers34.7 × 20 mm
XG Station Power MSI
osy/XG_Mobile_Station
Open source eGPU dock for ROG Ally and ROG Flow
4 parts712CC-BY-4.0 - 2 layers20.3 × 24.5 mm
Jack power input
Luos-io/luos_engine
Open-source and real-time orchestrator for cyber-physical-systems, to easily design, test and deploy embedded applications and digital twins.
4 parts546MIT - 2 layers35.1 × 92.1 mm
SDEX2M2 MicroSD Express to M.2 NVMe Adapter for Switch 2 WIP
NVNTLabs/switch2-SDEX2M2
Micro SD Express to M.2 NVME Adapter for Nintendo Switch 2
4 parts542GPL-3.0