Rei-32(レイ-32)

Minimal STM32 Development Board

Overview

• A compact STM32 development board designed from scratch with a focus on simplicity, usability, and a clean form factor.
• If there’s no need for a feature, it simply isn’t included.
• The complete hardware design was created in KiCad 10, including the schematic and PCB layout.
• Small board. Simple design. Full control.

Features

• STM32 microcontroller
• USB connectivity
• On-board WS2812B addressable LED
• Exposed GPIO pins
• Compact PCB layout
• Open hardware design

Hardware

• Rei-32 is built around an STM32F103C8T6 microcontroller, providing an ARM-based platform in a compact and practical form factor.

Form Factor

• Rei-32 has dimensions of 25mm by 55mm (0.98 inches by 2.17 inches for Americans).

PCB + Front + Front with components + Back

- The compact layout allows it to be used in projects where a larger development board would be inconvenient.

Boot Configuration

• Rei-32 includes dedicated configuration for the STM32 boot modes.
• The boot configuration is accessible directly on the board, allowing the MCU to be placed into the required boot mode without adding external circuitry.

Status LED

• An addressable WS2812B LED is included on the board.
• It can be used as a simple status indicator or controlled directly by firmware for debugging, state indication, and user feedback.

Schematic

• The complete schematic is included in the repository.

Author

• Hossein Sharifi
• Designed, developed, and documented as a personal hardware project.

License

GNU General Public License v3.0