4 layers91.4 × 68.6 mm
2 layers223.5 × 160 mm
Modular Synths for Everyone
- Size
- 223.5 × 160 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 201
- Nets
- 123
- Pads
- 718
- Tracks, vias
- 1,486, 359
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 4 Oct 2024
- Updated
- 25 Oct 2026
Overview
Base 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 223.5 × 160 mm with 201 parts on 123 nets, routed with 1,486 tracks and 359 vias.
It is built around the MCP6002T-I/SN(MS), TS922IDT and AP2112K-3.3TRG1, with the TS5A23157DGSR, PZ254-1-05-Z-8.5 and AO3400A among its other parts. Its parts include 53 resistors, 51 capacitors, 17 ICs, 16 diodes and 14 switches. It belongs with the audio and music boards of this library.
Main components
12
MCP6002T-I/SN(MS)
SOP-8-2.75V~-1.35V、1.35V~2.75V -55℃~+125℃ 1.2V/us 1.5MHz 1pA 2 2.1V~5.5V 2pA 500uV 50uA 650nV/℃ 95dB Built-in compensation、Zero drift / auto-zero Rail-to-Rail Input, Rail-to-Rail Output SOP-8 Operational Amplifier ROHSMSKSEMIOperational Amplifier
TS922IDT
SO-8-40℃~+125℃ 1.3V/us 100nA 12V 2 2.7V~12V 2mA 2uV/℃ 30nA 3mV 4MHz 80dB 80mA 9nV/√Hz@1kHz Rail-to-Rail Input, Rail-to-Rail Output SO-8 Operational Amplifier ROHSSTMicroelectronicsOperational Amplifier
AP2112K-3.3TRG1
SOT-25-5-40℃~+85℃@(Ta) 1 250mV@(600mA) 3.3V 50uVrms 55uA 600mA 65dB@(1kHz) 6V Fixed Over Current Protection、Thermal Shutdown、Enable control Positive SOT-25-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSDiodes IncorporatedVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
TS5A23157DGSR
MSOP-10-40℃~+85℃ 1.65V~5.5V 1.7ns 10Ω 17.5pF 2 220MHz 2:1 800ps MSOP-10 Analog Switches, Multiplexers ROHSTexas InstrumentsAnalog Switches, Multiplexers
PZ254-1-05-Z-8.5
插件,P=2.54mm-40℃~+105℃ 1 1x5P 2.54mm 2.5mm 3A 3mm 5P 6mm Black Brass Square pin Through Hole Plugin,P=2.54mm Pin Headers ROHSHCTLPin Headers
AO3400A
SOT-23-55℃~+150℃ 1 N-channel 1.45V 1.4W 30V 48mΩ@2.5V 5.7A 50pF 630pF 75pF 7nC@10V N-Channel SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
KT-0603R
0603-40℃~+85℃ 1.6mm x 0.8mm square LED 1.8V~2.4V 120° 20mA 300mcd 40mW 615nm~630nm 645nm Discrete Diode Red Water Clear 0603 LED Indication - Discrete ROHSHubei KENTO ElecLED Indication - Discrete
MSK12C02
SMD,8x2.8mm-20℃~+70℃ 1.4mm 10000 times 12V 2.8mm 50mA 8mm SMD(SMT) Tab SPDT Surface Mount, Right Angle SMD,8x2.8mm Slide Switches ROHSSHOU HANSlide Switches
CL31A107MQHNNNE
1206100uF 6.3V X5R ±20% 1206 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMTCL31A226KAHNNNE
120622uF 25V X5R ±10% 1206 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
PZ2012D800-3R0TF
0805-55℃~+125℃ 1 3A 40mΩ 80Ω@100MHz ±25% 0805 Ferrite Beads ROHSSunlordFerrite Beads
SMAJ5.0A/TR13
SMA(DO-214AC)-65℃~+150℃ 400W 43.5A 5V 6.4V 800uA 9.2V TVS Unidirectional SMA(DO-214AC) ESD and Surge Protection (TVS/ESD) ROHSBrightkingESD And Surge Protection (TVS/ESD)
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
201| Qty | Value | Footprint | References |
|---|---|---|---|
| 24 | Conn_01x05_Socket | BreadModular_MISC:Power_Connector | GND1, GND2, GND3, GND4, GND5, GND6, GND7, GND8, GND9, GND10, GND11, GND12, VSUPPLY_1, VSUPPLY_10, VSUPPLY_11, VSUPPLY_12 +8 |
| 13 | 0.1uf | Capacitor_SMD:C_0402_1005Metric | C23, C25, C27, C29, C31, C33, C35, C37, C39, C41, C43, C45, C47 |
| 13 | 100k | Resistor_SMD:R_0402_1005Metric | R29, R31, R33, R35, R37, R39, R41, R43, R45, R47, R49, R51, R55 |
| 13 | 1k | Resistor_SMD:R_0402_1005Metric | R62, R63, R64, R65, R66, R67, R68, R69, R70, R71, R72, R73, R74 |
| 13 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12, Q13 |
| 13 | LED | LED_SMD:LED_0603_1608Metric | D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16 |
| 13 | MSK12C02 | BreadModular_Selectors:SW_SPDT_Shouhan_MSK12C02_C431540 | SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9, SW10, SW11, SW12, SW13, SW14 |
| 12 | 1uf | Capacitor_SMD:C_0402_1005Metric | C22, C24, C26, C28, C30, C32, C34, C36, C38, C40, C42, C44 |
| 12 | TPS2116DRLR | Package_TO_SOT_SMD:SOT-583-8 | U6, U7, U8, U9, U10, U11, U12, U13, U14, U15, U16, U17 |
| 11 | 100uf | BreadModular_Base:C_1206_3216Metric | C3, C7, C8, C9, C10, C11, C12, C13, C14, C20, C46 |
| 6 | 0.1uf | BreadModular_Base:C_0402_1005Metric | C1, C15, C21, C50, C51, C52 |
| 6 | 1M | BreadModular_Base:R_0402_1005Metric | R5, R16, R17, R24, R60, R61 |
| 5 | 100k | BreadModular_Base:R_0402_1005Metric | R4, R6, R7, R8, R9 |
| 5 | 1k | BreadModular_Base:R_0402_1005Metric | R1, R14, R15, R20, R21 |
| 2 | 10 | BreadModular_Base:R_1206_3216Metric | R10, R12 |
| 2 | 10k | Resistor_SMD:R_0402_1005Metric | R58, R59 |
| 2 | 22uf | BreadModular_Base:C_1206_3216Metric | C6, C17 |
| 2 | 4.7uf | BreadModular_Base:C_0603_1608Metric | C18, C19 |
| 2 | 5.1k | BreadModular_Base:R_0603_1608Metric | R2, R3 |
| 2 | 50k | BreadModular_Pots:Potentiometer_RV09 | RV1, RV2 |
| 2 | 680k | BreadModular_Base:R_0603_1608Metric | R18, R19 |
| 2 | Ground | BreadModular_Base:Jack_3.5mm_QingPu_WQP-PJ366ST_Vertical | J2, J4 |
| 2 | MCP6002-xSN | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2, U4 |
| 2 | PZ2012D800-3R0TF | BreadModular_Base:C_0805_2012Metric | FB1, FB2 |
| 2 | SMAJ5.0A | Diode_SMD:D_SMA | D2, D3 |
| 1 | 100 | BreadModular_Base:R_0402_1005Metric | R26 |
| 1 | 100 | Resistor_SMD:R_0402_1005Metric | R57 |
| 1 | 100n | Capacitor_SMD:C_0402_1005Metric | C48 |
| 1 | 10nf | BreadModular_Base:C_0805_2012Metric | C5 |
| 1 | 1uf | BreadModular_Base:C_0805_2012Metric | C2 |
| 1 | 220nf | BreadModular_Base:C_0402_1005Metric | C16 |
| 1 | 3.3k | BreadModular_Base:R_0402_1005Metric | R27 |
| 1 | 4.7uf | BreadModular_Base:C_0805_2012Metric | C4 |
| 1 | AP2112K-3.3 | BreadModular_Base:SOT-23-5 | U5 |
| 1 | BSMD1812-200-16V | Fuse:Fuse_1812_4532Metric | F1 |
| 1 | Conn_01x05_Socket | BreadModular_Base:PinSocket_1x05_P2.54mm_Vertical | INPUT1 |
| 1 | Conn_02x05_Socket | BreadModular_Base:PinSocket_2x05_P2.54mm_Vertical | 5V14 |
| 1 | HeadphoneOut | BreadModular_Base:Jack_3.5mm_QingPu_WQP-PJ366ST_Vertical | J6 |
| 1 | K2-1808SN-A4SW-01 | BreadModular_Base:K2-1808SN-A4SW-01 | SW1 |
| 1 | LED | BreadModular_Base:LED_0603_1608Metric | D1 |
| 1 | LineOut | BreadModular_Base:Jack_3.5mm_QingPu_WQP-PJ366ST_Vertical | J1 |
| 1 | MF-MSMF110/16-2 | Fuse:Fuse_1812_4532Metric | F2 |
| 1 | TS5A23157DGS | Package_SO:TSSOP-10_3x3mm_P0.5mm | U18 |
| 1 | TS922IDT | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | USB_C_Receptacle_PowerOnly_6P | BreadModular_Base:HRO-TYPE-C-31-M-12 | J5 |
Questions
How big is the Base PCB?
It measures 223.5 × 160 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Base use?
201 parts, built around the MCP6002T-I/SN(MS), TS922IDT, AP2112K-3.3TRG1 and TS5A23157DGSR. 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 Base KiCad files?
From the bread-modular/bread-modular repository on GitHub, at the commit this page was made from: the board is modules/base/base.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Base 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).
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