4 layers42 × 42 mm
2 layers23.4 × 40.3 mm
APX DEVBOARD
Gabouin/APX_DEVBOARD1simple cost-effective devboard made for RESOLUTION
- Size
- 23.4 × 40.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 30
- Nets
- 47
- Pads
- 125
- Tracks, vias
- 343, 57
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 11 May 2026
- Updated
- 5 Jun 2026
Overview
APX DEVBOARD is an open-source printed circuit board by Gabouin, from the Gabouin/APX_DEVBOARD repository on GitHub, published under the MIT licence. It is a 2-layer board of 23.4 × 40.3 mm with 30 parts on 47 nets, routed with 343 tracks and 57 vias.
It is built around the STM32G431CBT6. Its parts include 12 capacitors, 7 resistors, 2 ICs and 2 connectors. It belongs with the microcontroller boards boards and the STM32 boards of this library.
Main components
1README
README.md
APX DEVBOARD
A STM32 based devboard with Buttons, a LED and 8 GPIO pins.
About • Structure • Schematic • PCB • CAD • BOM • License • Credits
About the Project
APX DEVBOARD is a STM32 based devboard designed with GPIO pins, buttons and an LED
Features
- STM32G431CBT6 MCU 32-Bit 170MHz 128KB (128K x 8) FLASH 48-LQFP (7x7)
- 8 GPIO pins to help make any hardware project
- GPIO linked LED to program it without needing an external LED
- GPIO linked button to use it without needing an external button
- BOOT and RESET buttons
- USB-C input
- GND pour on both layers to reduce noise
- Amiri silkscreen for a professional look
- Original edge cut to look cool lol
- Small size of 2.3*3.7 cm
Repository Structure
src/— KiCad and Fusion360 project sourcesproduction/— PCB and CAD fabrication files (Gerbers, BOM, Pick & Place, 3mf)images/— images used in the README and documentation
Schematic on KiCad
Source : src/schem
PCB on KiCad
Source : src/pcb/
The PCB design is made on only 2 layers, to reduce the cost of the board !
Share Links
go check out the pcb on KiCanva !
go check out the case on Fusion360 !
CAD
Source : src/CAD and
production/CAD
The case use snap fits as there is no mounting hole in the PCB.
Bill of Materials
Source: production/pcb/bom.csv
| Designator | Footprint | Quantity | Value | LCSC Part # |
|---|---|---|---|---|
| PA2 | 0603 | 1 | LED | C2286 |
| BOOT | SW-SMD_L3.9-W3.0-P4.45 | 1 | BOOT | C455280 |
| C11, C12, C5, C6, C8 | 0603 | 5 | 1uF | C15849 |
| C1, C10, C2, C3, C4, C7 | 0603 | 6 | 100nF | C14663 |
| C9 | 0603 | 1 | 10nF | C57112 |
| DEBUG | PinHeader_1x04_P2.54mm_Vertical | 1 | Conn_01x04 | C2691448 |
| J1 | PinHeader_1x05_P2.54mm_Vertical | 1 | Header Left | C124379 |
| J2 | PinHeader_1x05_P2.54mm_Vertical | 1 | Header Right | C124379 |
| PA3 | SW-SMD_L3.9-W3.0-P4.45 | 1 | PA3 | C455280 |
| R1, R2 | 0603 | 2 | 100k | C23186 |
| R3, R4, R7 | 0603 | 3 | 10k | C25804 |
| R6, R5 | 0603 | 2 | 5.1k | C25803 |
| RESET | SW-SMD_L3.9-W3.0-P4.45 | 1 | RESET | C455280 |
| STM32 | LQFP-48_L7.0-W7.0-P0.50-LS9.0-BL | 1 | STM32G431CBT6 | C529355 |
| U1 | SOT-23-3 | 1 | XC6206PxxxMR | C5446 |
| USB-C1 | USB-C-SMD_TYPE-C-16PIN-2MD-073 | 1 | TYPE-C 16PIN 2MD | C2765186 |
JLPCB order
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- APX USB HUB - A PTC-secured USB HUB designed for Macondo - Hack Club
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- See more in my github
License
This project is licensed under the MIT License — see the LICENSE file for details.
Credits
This project uses:
- KiCad - PCB design and schematic capture
- JLCPCB - PCB manufacturing
- LCSC - Parts order
- Figma - Silkscreen and banner design
- Fusion 360 - CAD
- @NotARoomba - Readme template
Parts
30| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3, C4, C7, C10 |
| 4 | 1uF | Capacitor_SMD:C_0603_1608Metric | C6, C8, C11, C12 |
| 3 | 10k | Resistor_SMD:R_0603_1608Metric | R3, R4, R7 |
| 3 | Button | easyeda2kicad:SW-SMD_L3.9-W3.0-P4.45 | BOOT, PA3, RESET |
| 2 | 100k | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R5, R6 |
| 2 | Conn_01x05 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J2, J3 |
| 2 | LOGO | LOGO | G***, G*** |
| 1 | 10nF | Capacitor_SMD:C_0603_1608Metric | C9 |
| 1 | 1uf | Capacitor_SMD:C_0603_1608Metric | C5 |
| 1 | LED | LED_SMD:LED_0603_1608Metric | PA2 |
| 1 | STM32G431CBT6 | easyeda2kicad:LQFP-48_L7.0-W7.0-P0.50-LS9.0-BL | U1 |
| 1 | TYPE-C 16PIN 2MD | easyeda2kicad:USB-C-SMD_TYPE-C-16PIN-2MD-073 | USB1 |
| 1 | XC6206PxxxMR | Package_TO_SOT_SMD:SOT-23-3 | U2 |
Questions
How big is the APX DEVBOARD PCB?
It measures 23.4 × 40.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the APX DEVBOARD use?
30 parts, built around the STM32G431CBT6. 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 APX DEVBOARD KiCad files?
From the Gabouin/APX_DEVBOARD repository on GitHub, at the commit this page was made from: the board is src/APX Devboard.kicad_pcb and its schematic src/APX Devboard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the APX DEVBOARD 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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