2 layers71.1 × 35.1 mm
Brilliant Reflow v0.1
LKbrilliant/Brilliant-Reflow
A complete DIY solution for converting a consumer oven into a temperature controlled reflow oven for PCB soldering
28 parts4MIT
2 layers37 × 30 mm
STM 32 course
Ahaz387/STM-32This project is a custom PCB designed around an STM32 microcontroller for embedded systems development and peripheral interfacing.
- Size
- 37 × 30 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 32
- Nets
- 50
- Pads
- 132
- Tracks, vias
- 186, 24
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 22 May 2026
- Updated
- 24 May 2026
Overview
STM 32 course is an open-source printed circuit board by Ahaz387, from the Ahaz387/STM-32 repository on GitHub. It is a 2-layer board of 37 × 30 mm with 32 parts on 50 nets, routed with 186 tracks and 24 vias.
It is built around the STM32F103C8T6 and AMS1117. Its parts include 13 capacitors, 5 resistors, 4 connectors, 2 ICs and 1 diode. It belongs with the interfaces and adapters boards and the STM32 boards of this library.
Main components
2README
README.mdSTM32 PCB Project README
Overview
This project is a custom PCB designed around an STM32 microcontroller for embedded systems development and peripheral interfacing. The PCB integrates power regulation, programming/debugging interfaces, GPIO breakout connections, and communication peripherals such as UART, I²C, and SPI.
The board can be used for:
- Embedded systems development
- Sensor interfacing
- Motor control applications
- IoT projects
- Robotics systems
- Real-time data acquisition
Features
- STM32 microcontroller core
- USB programming and communication
- SWD debugging support
- UART communication interface
- I²C communication interface
- SPI communication interface
- GPIO expansion headers
- On-board voltage regulation
- Status LEDs
- Reset and boot buttons
- Decoupling capacitors for stable operation
Microcontroller
| Component | Description |
|---|---|
| MCU | STM32 Series Microcontroller |
| Architecture | ARM Cortex-M |
| Operating Voltage | 3.3V |
| Clock Source | External Crystal Oscillator |
Example STM32 variants:
- STM32F103C8T6
- STM32F401CCU6
- STM32F411CEU6
PCB Design Software
Designed using:
- KiCad
- STM32CubeMX (for pin configuration)
Communication Interfaces
UART
Used for:
- Serial debugging
- PC communication
- Bluetooth/GPS modules
| Signal | Description |
|---|---|
| TX | Transmit |
| RX | Receive |
| GND | Ground |
I²C
Used for:
- Sensors
- OLED displays
- EEPROMs
- RTC modules
| Signal | Description |
|---|---|
| SDA | Serial Data |
| SCL | Serial Clock |
Pull-up resistors are included on SDA and SCL lines.
SPI
Used for:
- SD cards
- Displays
- High-speed peripherals
| Signal | Description |
|---|---|
| MOSI | Master Out Slave In |
| MISO | Master In Slave Out |
| SCK | Serial Clock |
| CS | Chip Select |
Power System
Input Power
- USB 5V input
- External VIN input
Regulation
The PCB uses a 3.3V voltage regulator to power the STM32 and peripherals.
Protection
- Reverse polarity protection
- Decoupling capacitors
- Power filtering capacitors
Programming and Debugging
The board supports SWD (Serial Wire Debug) programming.
Required Programmer
- ST-Link V2
- ST-Link V3
SWD Pins
| Pin | Description |
|---|---|
| SWDIO | Debug Data |
| SWCLK | Debug Clock |
| GND | Ground |
| 3.3V | Reference Voltage |
PCB Layout Considerations
- Short trace routing for high-speed signals
- Ground plane for noise reduction
- Decoupling capacitors placed near power pins
- Proper crystal oscillator placement
- Wide traces for power lines
- Separation between analog and digital signals
Firmware Development
Recommended software:
- STM32CubeIDE
- Keil uVision
- PlatformIO
- Arduino IDE (STM32 core)
Assembly Notes
- Verify component orientation before soldering
- Check STM32 pin alignment carefully
- Inspect for solder bridges
- Test power rails before programming
- Ensure correct boot configuration
Testing
Recommended initial tests:
- Verify 3.3V rail
- Test reset circuit
- Confirm oscillator operation
- Upload LED blink firmware
- Test UART serial communication
- Verify I²C and SPI peripherals
Future Improvements
- USB-C support
- CAN bus integration
- Wireless communication module
- Battery charging system
- On-board sensors
Author
Designed by Ahaz
License
This project is open-source and available for educational and personal use.
Parts
32| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 100n | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4, C9 |
| 4 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1, H2, H3, H4 |
| 3 | 1k5 | Resistor_SMD:R_0402_1005Metric | R2, R4, R5 |
| 3 | Conn_01x04_Pin | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1, J3, J4 |
| 2 | 10p | Capacitor_SMD:C_0402_1005Metric | C10, C11 |
| 2 | 1u | Capacitor_SMD:C_0402_1005Metric | C7, C8 |
| 2 | 22u | Capacitor_SMD:C_0805_2012Metric | C12, C13 |
| 1 | 10k | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 10n | Capacitor_SMD:C_0402_1005Metric | C6 |
| 1 | 10u | Capacitor_SMD:C_0603_1608Metric | C5 |
| 1 | 16MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | AMS1117 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | FerriteBead | Inductor_SMD:L_0603_1608Metric | FB1 |
| 1 | LED | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | R | Resistor_SMD:R_0402_1005Metric | R3 |
| 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 | J2 |
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Questions
How big is the STM 32 course PCB?
It measures 37 × 30 mm and has 2 copper layers, 1.6 mm thick.
What parts does the STM 32 course use?
32 parts, built around the STM32F103C8T6 and AMS1117. 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 STM 32 course KiCad files?
From the Ahaz387/STM-32 repository on GitHub, at the commit this page was made from: the board is STM 32 course.kicad_pcb and its schematic STM 32 course.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the STM 32 course design in my own project?
Its repository states no licence, so its author keeps all rights: ask Ahaz387 before reusing the design.