4 layers52.7 × 42.5 mm
OmniProbe
emertcakir/OmniProbe
Open-source SWD, JTAG, UART, SPI, I2C and Logic Analyzer platform powered by RP2040
77 parts4MIT
2 layers50 × 40 mm
Custom STM32 development board designed using KiCad.
- Size
- 50 × 40 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 39
- Pads
- 119
- Tracks, vias
- 200, 25
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 16 Oct 2026
- Updated
- 16 Oct 2026
Overview
STM32 is an open-source printed circuit board by iniyan26, from the iniyan26/STM32-Development-Board repository on GitHub. It is a 2-layer board of 50 × 40 mm with 25 parts on 39 nets, routed with 200 tracks and 25 vias.
It is built around the AP2112K-3.3 and PTVS5V0Z1USKYL. Its parts include 6 capacitors, 6 resistors, 5 connectors, 3 diodes and 2 ICs. It belongs with the microcontroller boards boards and the STM32 boards of this library.
Main components
2README
README.mdSTM32 Development Board
Custom STM32 development board designed using KiCad, featuring USB-C power input, 3.3V regulation, protection circuitry, and GPIO expansion.
Features
- USB-C 5V power input
- Fuse and TVS protection
- AP2112K 3.3V voltage regulator
- Reset switch and status LEDs
- SWD debugging and UART communication
- GPIO expansion headers
- Two-layer PCB layout
Tools
- KiCad
Project Structure
schematic/— Schematic filespcb/— PCB layout filesimages/— Design screenshots
Verification PCB DRC completed with 0 violations and 0 unconnected items in the final check.
Hardware manufacturing and testing have not been confirmed.
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 100nF | Capacitor_SMD:C_0603_1608Metric | C2, C5, C6 |
| 2 | 10k | Resistor_SMD:R_0603_1608Metric | R3, R5 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 1K | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | C3 |
| 1 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C4 |
| 1 | 500mA | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | GPIO_A | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical | J4 |
| 1 | GPIO_B | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical | J5 |
| 1 | POWER_LED | LED_SMD:LED_0603_1608Metric | D3 |
| 1 | PTVS5V0Z1USK | Diode_SMD:Nexperia_DSN1608-2_1.6x0.8mm | D1 |
| 1 | STM32G031K8Tx | Package_QFP:LQFP-32_7x7mm_P0.8mm | U2 |
| 1 | SWD | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J2 |
| 1 | SW_Push | Button_Switch_SMD:SW_Push_1P1T-SH_NO_CK_KMR2xxG | SW1 |
| 1 | UART | Connector:FanPinHeader_1x04_P2.54mm_Vertical | J3 |
| 1 | USB_C_Receptacle_PowerOnly_6P | Connector_USB:USB_C_Receptacle_GCT_USB4125-xx-x-0190_6P_TopMnt_Horizontal | J1 |
| 1 | USER_BUTTON | Button_Switch_SMD:SW_Push_1P1T-SH_NO_CK_KMR2xxG | SW2 |
| 1 | USER_LED | LED_SMD:LED_0603_1608Metric | D2 |
Questions
How big is the STM32 PCB?
It measures 50 × 40 mm and has 2 copper layers, 1.6 mm thick.
What parts does the STM32 use?
25 parts, built around the AP2112K-3.3 and PTVS5V0Z1USKYL. 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 STM32 KiCad files?
From the iniyan26/STM32-Development-Board repository on GitHub, at the commit this page was made from: the board is pcb/STM32.kicad_pcb and its schematic schematic/STM32.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the STM32 design in my own project?
Its repository states no licence, so its author keeps all rights: ask iniyan26 before reusing the design.
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