2 layers223.5 × 160 mm
2 layers30.5 × 68.6 mm
Esp32-s3
bread-modular/bread-modular67Modular Synths for Everyone
- Size
- 30.5 × 68.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 17
- Nets
- 43
- Pads
- 132
- Tracks, vias
- 154, 20
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 4 Oct 2024
- Updated
- 25 Oct 2026
Overview
Esp32-s3 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 17 parts on 43 nets, routed with 154 tracks and 20 vias.
It is built around the ESP32-S3-WROOM-1U-N16R8 and K2-1808SN-A4SW-01. Its parts include 5 capacitors, 3 resistors, 2 switches, 1 IC and 1 connector. It belongs with the audio and music boards and the ESP32 boards of this library.
Main components
2
ESP32-S3-WROOM-1U-N16R8
SMD,19.2x18mm-103.5dBm -40℃~+65℃ 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA Bluetooth5.0 ESP32-S3R8 UART、SDIO、SPI、I2C、GPIO、PWM、ADC、I2S、JTAG、USB SMD,19.2x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
K2-1808SN-A4SW-01
SMD,4.2x3.3mm-25℃~+85℃ 100,000 cycles 12V 2.5N 2.5mm 3.25mm 4.2mm 50mA Oval Button SPST Surface Mount,Vertical SMD,4.2x3.3mm Tactile Switches ROHSHRO ElectronicsTactile Switches
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
17| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 0.1uf | Capacitor_SMD:C_0402_1005Metric | C1, C4 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R4, R11 |
| 2 | Conn_01x05_Pin | BreadModular_MISC:Power_Connector | GND1, V_SUPPLY1 |
| 2 | Conn_01x08_Socket | Connector_PinSocket_2.54mm:PinSocket_1x08_P2.54mm_Vertical | INPUT1, OUTPUT1 |
| 2 | K2-1808SN-A4SW-01 | BreadModular_MISC:K2-1808SN-A4SW-01 | SW1, SW2 |
| 1 | 10k | Resistor_SMD:R_0402_1005Metric | R3 |
| 1 | 10nf | Capacitor_SMD:C_0805_2012Metric | C20 |
| 1 | 1uf | Capacitor_SMD:C_0402_1005Metric | C3 |
| 1 | 22uf | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | Conn_01x02_Socket | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | INPUT2 |
| 1 | ESP32-S3-WROOM-1U-N16R8 | RF_Module:ESP32-S3-WROOM-1U | U1 |
| 1 | USB_C_Receptacle_USB2.0_14P | BreadModular_TypeC:HRO-TYPE-C-31-M-12 | J5 |
Questions
How big is the Esp32-s3 PCB?
It measures 30.5 × 68.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Esp32-s3 use?
17 parts, built around the ESP32-S3-WROOM-1U-N16R8 and K2-1808SN-A4SW-01. 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 Esp32-s3 KiCad files?
From the bread-modular/bread-modular repository on GitHub, at the commit this page was made from: the board is opt/Breakouts/ESP32S3/esp32-s3.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Esp32-s3 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
- 4 layers150 × 85 mm
DetentOne
alislaboratory/detentOne
A Customisable BLE Macropad with a Haptic Knob and OLED.
98 parts2MIT - 4 layers82.8 × 62.8 mm
Tfr911h
strickyak/tfr9
The TFR/9 Single Board Computer for Hitachi 6309E or Motorola 6809E CPUs (TFR/901)
116 parts12MIT - 4 layers97.6 × 96 mm
Centipede-32e
strickyak/copico-centipede
A Radio Shack / Tandy Color Computer ("Coco") wildcard peripheral cartridge, with an RP2350 processor and 46 usable GPIO lines, covering most of the Coco's expansion port bus.
135 parts7MIT - 4 layers93.5 × 81 mm
- 4 layers82.1 × 21 mm
Pico stretch2
jvanderberg/pico-stretch2
An RP2350B dev board that breaks out all 48 GPIO pins while following the original Raspberry Pi Pico footprint for the first 20 pins on each side.
70 parts2 - 6 layers40 × 75 mm
- 6 layers128.3 × 98.3 mm
- 4 layers56.8 × 21 mm
Rp2350b pico
Charading/rp2350b-pico
I wanted a board similar to the rp2040 pico so i just designed my own, it's extended by two more pins, in order to break out a ton of gpio and also all 8 ADC pins
59 parts