Stm32f103 Muhammad Refansa Annaafi

STM32F103 Minimal Development Board

A compact 2-layer STM32F103 (LQFP-48) breakout board designed in KiCad 9. It is powered over USB and exposes SWD, SPI and I2C on pin headers.

Features

• MCU: STM32F103 in LQFP-48 (U1)
• Clock: 16 MHz crystal (TSX-3225) with 8 pF load capacitors
• Power: USB Micro-B → AMS1117-3.3 LDO → 3.3 V, with a ferrite bead (120 Ω) filtering VDDA
• USB: D+ pull-up (1k5) on PA12
• Boot mode: slide switch (SW2) on BOOT0
• Reset: tactile button (SW1) on NRST
• Power LED: red LED (D1)
• Headers:
  • J1: SWD (3V3, SWDIO, SWCLK, GND)
  • J3: SPI1 (3V3, NSS, SCK, MISO, MOSI, GND)
  • J4: I2C1 on PB10/PB11 with 1k5 pull-ups
• Board: about 33.5 × 24.2 mm, 2 layers, 1.6 mm thick, all components on the top side

Schematic

PCB Layout

Repository Structure

.
├── stm32f103_Muhammad Refansa Annaafi.kicad_pro   # KiCad project
├── stm32f103_Muhammad Refansa Annaafi.kicad_sch   # Schematic
├── stm32f103_Muhammad Refansa Annaafi.kicad_pcb   # PCB layout
├── Gerber/    # Fabrication outputs (Gerbers, drill files, job file)
├── BOM/       # Bill of materials (CSV)
└── Media/     # Screenshots and renders

Bill of Materials

The full BOM is in BOM/.

Manufacturing

Upload the contents of Gerber/ to a PCB fab such as JLCPCB or PCBWay. It includes the copper, mask, paste, silkscreen and edge-cut layers, plus the PTH/NPTH drill files.

Opening the Project

Open the .kicad_pro file in KiCad 9.0 or newer. The project uses a custom KCCI symbol/footprint library for some parts (for example the crystal). If those parts show up as missing, add that library to your library tables.

Author

Muhammad Refansa Annaafi. Designed as part of the KCCI PCB design training.