My stm32-devboard

STM32F103C8T6 Development Board

A custom STM32F103C8T6 development board designed in KiCad and taken through the full prototype workflow: schematic capture, PCB layout, manufacturing output generation, PCB fabrication, component sourcing, hand soldering, and physical assembly.

The board was designed as a compact embedded development platform exposing common STM32 interfaces for firmware experiments, peripheral testing, and hardware bring-up practice.

Highlights

• MCU: STM32F103C8T6, Arm Cortex-M3, LQFP-48 package
• PCB: 2-layer FR4 board, approximately 74.5 mm x 57.35 mm
• Power: Micro USB input and AMS1117-3.3 regulator
• Programming/debug: SWDIO, SWCLK, NRST, BOOT0 switch
• Interfaces: USART1, I2C2, CAN, GPIO headers
• Peripherals: TMP112 I2C temperature sensor, user LED on PC13
• Protection/support circuitry: USB ESD protection, 16 MHz crystal, decoupling capacitors, mounting holes
• Manufacturing package: Gerber, drill, netlist, placement, and BOM-related outputs

Board Overview

The design breaks out the STM32F103C8T6 pins to labeled headers while keeping the support circuitry needed for real board bring-up:

• USB connector and 3.3 V regulation for bench power
• SWD header signals for programming and debugging
• BOOT0 selection for boot mode control
• USART1 pins for serial communication
• I2C2 bus routed to the onboard TMP112 temperature sensor and external header
• CAN RX/TX routed through an MCP2551 CAN transceiver
• User LED connected to PC13

Images

Schematic

PCB Layout

3D Render

Repository Contents

.
|-- my_stm32-devboard.kicad_pro       KiCad project file
|-- my_stm32-devboard.kicad_sch       Schematic source
|-- my_stm32-devboard.kicad_pcb       PCB layout source
|-- manufacturing/                    Gerber and drill files exported from KiCad
|-- production/                       BOM, placement, netlist, and packaged Gerber output
|-- docs/images/                      README images and assembled board photo
|-- *.STEP                            3D models used by the board

Prototype Workflow

1. Designed the schematic and PCB layout in KiCad.
2. Generated manufacturing files, including Gerbers and drill files.
3. Ordered the PCB from a manufacturer in China.
4. Sourced the electronic components in Turkey.
5. Hand-soldered the SMD/THT components and assembled the prototype at home.

Notes

• This repository documents a personal embedded hardware prototype and is intended for portfolio/review purposes.
• Before re-ordering or modifying the board, regenerate the manufacturing package from the KiCad project to keep Gerber, BOM, and placement files aligned with the latest design.
• Firmware is not included in this repository.

Author

Designed and assembled by Orkun K. Gungor, 2023.