2 layers68 × 40 mm
Stm32-io extend
hardenedlinux/cheap-pcb
Cheap PCB: Better understanding the current status of hardware supply chain
44 parts170CC0-1.0
2 layers46.5 × 41 mm
This repository contains a simple two-layer STM32 PCB design created in KiCad. The board is built around an STM32F103C8T6 microcontroller and includes a micro-USB connector, SWD programming/debug access, reset support…
- Size
- 46.5 × 41 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 32
- Nets
- 50
- Pads
- 132
- Tracks, vias
- 0, 0
- Routed
- Not yet
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 2 Jun 2026
- Updated
- 11 Jun 2026
Overview
STM32 is an open-source printed circuit board by Prafulla45, from the Prafulla45/Simple-STM32 repository on GitHub. It is a 2-layer board of 46.5 × 41 mm with 32 parts on 50 nets.
It is built around the STM32F103C8T6 and AMS1117-3.3. Its parts include 13 capacitors, 5 resistors, 4 connectors, 2 ICs and 1 diode. It belongs with the STM32 boards of this library.
Main components
2
STM32F103C8T6
LQFP-48(7x7)-40℃~+85℃ 12bit 20KB 2V~3.6V 32 Bit 37 64KB 72MHz ARM Cortex-M3 Built-in FLASH LQFP-48(7x7) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdSTM32 Demo PCB
This repository contains a simple two-layer STM32 PCB design created in KiCad. The board is built around an STM32F103C8T6 microcontroller and includes a micro-USB connector, SWD programming/debug access, reset support, and the basic surrounding circuitry needed for a compact demonstration board.
Project Overview
The goal of this project was to complete a clean and practical STM32 development board layout with a straightforward schematic and well-routed PCB. The design uses a 1.6 mm board thickness and is organized as a standard double-layer board for easier fabrication and assembly.
Figures
Front View
Back View
Routing View
Schematic
3D Model
A STEP model is included for mechanical review and enclosure fitting:
629105150521 (rev1).stp
Project Files
STM32.kicad_pro- KiCad project fileSTM32.kicad_sch- schematicSTM32.kicad_pcb- PCB layoutSTM32.kicad_prl- project-related settings
Notes
The design is intended as a learning and demo project, so it focuses on a clear layout and practical connectivity rather than advanced peripherals.
Parts
32| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 100 n | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4, C9 |
| 4 | 1k5 | Resistor_SMD:R_0402_1005Metric | R2, R3, R4, R5 |
| 4 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1, H2, H3, H4 |
| 3 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J2, J3, J4 |
| 2 | 10p | Capacitor_SMD:C_0402_1005Metric | C10, C11 |
| 2 | 1u | Capacitor_SMD:C_0402_1005Metric | C6, C8 |
| 2 | 22u | Capacitor_SMD:C_0805_2012Metric | C12, C13 |
| 1 | 10k | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 10n | Capacitor_SMD:C_0805_2012Metric | C7 |
| 1 | 10u | Capacitor_SMD:C_0603_1608Metric | C5 |
| 1 | 120R | Inductor_SMD:L_0603_1608Metric | FB1 |
| 1 | 16MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | RED | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | STM32F103C8T6 | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | SW_SPDT | Button_Switch_SMD:SW_SPDT_PCM12 | SW1 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Wuerth_629105150521 | J1 |
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Questions
How big is the STM32 PCB?
It measures 46.5 × 41 mm and has 2 copper layers, 1.6 mm thick.
What parts does the STM32 use?
32 parts, built around the STM32F103C8T6 and AMS1117-3.3. 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 Prafulla45/Simple-STM32 repository on GitHub, at the commit this page was made from: the board is STM32.kicad_pcb and its 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 Prafulla45 before reusing the design.