4 layers21 × 51 mm
Easyduino RP2040
Hanqaqa/Easyduino
Easily dive into different PCB KiCad designs of the most popular microcontroller devboards
65 parts755CERN-OHL-P-2.0
4 layers51.5 × 36 mm
Stm32f401 devboard
Null-byte-00/stm32_devboardCustom designed STM32F401CCU6 Dev Board
- Size
- 51.5 × 36 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 42
- Nets
- 53
- Pads
- 181
- Tracks, vias
- 336, 51
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 30 Jul 2026
- Updated
- 31 Jul 2026
Overview
Stm32f401 devboard is an open-source printed circuit board by Null-byte-00, from the Null-byte-00/stm32_devboard repository on GitHub. It is a 4-layer board of 51.5 × 36 mm with 42 parts on 53 nets, routed with 336 tracks and 51 vias.
It is built around the XC6206P332MR. Its parts include 12 capacitors, 9 resistors, 6 connectors, 2 ICs and 2 switches. It belongs with the microcontroller boards boards and the STM32 boards of this library.
Main components
1README
README.mdCustom Designed STM32F401CCU6 Dev Board
This is a 4 layer STM32F401CCU6 Dev Board I designed and sent for fabrication and assembly at JLCPCB
the picture of the board's front and back:
It still has a few problems I mentioned later in this document.
Schematic and pcb layout
the board was designed with kicad. It has 4 layers including a ground plane, power plane and 2 signal layer.
circuit schematic:
a view of pcb layout:
Kicad 3d viewer:
Problems with this version
Since the design was rushed and this being my first microcontroller design there are a few problems with this version I'm trying to solve in later iterations.
- Wrong oscillator and USB connection
I chose the wrong oscillator for the board's high speed clock. and since stm32's usb connection requires a clock multiple of 1MHz to establish a USB connection, this board is unable to interact through USB.
And since I didn't add a SWD connector, the only way to program the board is with a UART to USB connector connected to the board's UART pins.
But the board still needs to be powered by USB.
Here's a picture of the board connected to my laptop through a UARD-to-USB module:
- there are a few mistakes on the silkscreen
- the position files are auto generated and I had to adjust them before sending for assembly
Video
See this youtube video for more information about this project:
https://www.youtube.com/shorts/pBtifo1SFRY
Parts
42| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 10n | Capacitor_SMD:C_0402_1005Metric | C2, C3, C4, C5, C12 |
| 4 | MountingHole | MountingHole:MountingHole_2.1mm | H1, H2, H3, H4 |
| 3 | 1k | Resistor_SMD:R_0402_1005Metric | R6, R7, R8 |
| 3 | TestPoint | TestPoint:TestPoint_Pad_D1.5mm | TP1, TP2, TP3 |
| 2 | 1u | Capacitor_SMD:C_0603_1608Metric | C10, C11 |
| 2 | 22p | Capacitor_SMD:C_0402_1005Metric | C8, C9 |
| 2 | 4.7k | Resistor_SMD:R_0805_2012Metric | R3, R4 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R2, R9 |
| 2 | Conn_01x04_Pin | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1, J3 |
| 2 | Conn_01x06_Pin | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J4, J5 |
| 2 | LOGO | LOGO | G***, G*** |
| 1 | 1.5k | Resistor_SMD:R_0805_2012Metric | R5 |
| 1 | 100n | Capacitor_SMD:C_0603_1608Metric | C7 |
| 1 | 10k | Resistor_SMD:R_1206_3216Metric | R1 |
| 1 | 10u | Capacitor_SMD:C_1206_3216Metric | C6 |
| 1 | 2.2u | Capacitor_SMD:C_1206_3216Metric | C1 |
| 1 | Conn_01x05_Pin | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J2 |
| 1 | Crystal_GND24 | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | LED | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | STM32F401CCUx | Package_DFN_QFN:QFN-48-1EP_7x7mm_P0.5mm_EP5.6x5.6mm | U1 |
| 1 | SW_Push | Button_Switch_SMD:SW_TS-1088_XNP | SW2 |
| 1 | SW_SPDT | Button_Switch_SMD:SW-TH_K3-1293S-E2 | SW1 |
| 1 | USB_C_Receptacle_USB2.0_14P | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J6 |
| 1 | XC6206P332MR | Package_TO_SOT_SMD:SOT-23-3 | U2 |
Questions
How big is the Stm32f401 devboard PCB?
It measures 51.5 × 36 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Stm32f401 devboard use?
42 parts, built around the XC6206P332MR. 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 Stm32f401 devboard KiCad files?
From the Null-byte-00/stm32_devboard repository on GitHub, at the commit this page was made from: the board is pcb/stm32f401_devboard.kicad_pcb and its schematic pcb/stm32f401_devboard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Stm32f401 devboard design in my own project?
Its repository states no licence, so its author keeps all rights: ask Null-byte-00 before reusing the design.
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