RJX Embedded Training Kit

Overview

Hardware training platform built around STM32L431 with:

• 5 V input and dual 3.3 V rails (digital +3V3 and analog +3V3A)
• Li-ion charger/power-path + fuel gauge
• Sensors (I2C/SMBus + SPI), UI peripherals (LCD/7-seg/buzzer), and CAN

This repository contains the complete KiCad 9 hardware design, PDFs/datasheets, and the STM32CubeMX pinout file. I have ensured that it is properly version-controlled by removing unnecessary KiCad artefacts/tool-specific outputs which can easily be re-generated by any user, and ensuring transition from the schematic design to PCB design and vice-versa without using netlists. The block diagram of the project is shown in the image below.

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Repository layout

.
├── LICENSE
├── README.md
├── images
│   └── rjx_training_kit.png
├── pinout
│   └── pinout.ioc
└── rjx_training_kit
    ├── Docs         (schematic PDF, datasheets, links)
    ├── Hardware     (KiCad project: schematics + PCB)
    ├── Libs         (project libraries)
    └── Outputs      (manufacturing files)

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Quick start

View / edit hardware (KiCad 9)

1. Install KiCad v9 (recommended).
2. Open the project:
   • rjx_training_kit/Hardware/rjx_training_kit.kicad_pro
3. Schematic sheets:
   • Top-level: rjx_training_kit/Hardware/rjx_training_kit.kicad_sch
   • Sub-sheets: rjx_training_kit/Hardware/microcontroller.kicad_sch, rjx_training_kit/Hardware/peripherals.kicad_sch
4. PCB layout:
   • rjx_training_kit/Hardware/rjx_training_kit.kicad_pcb

View pin configuration (STM32CubeMX)

• Open pinout/pinout.ioc in STM32CubeMX.

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Documentation

Schematic PDF

• rjx_training_kit/Docs/rjx_training_kit.pdf

Component datasheets

Datasheets used by the design are stored in:

• rjx_training_kit/Docs/

External links

External forum references and troubleshooting links are maintained here:

• Links.md

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Checklist

• Schematic capture
• Board setup
• Component placement and routing
• DRC
• Generate manufacturing outputs and BOM
• Place an order for the board on PCBWay
• Preliminary board tests
• Create a basic user guide on how to get started with the board

License

GPL-3.0 (see LICENSE).