Universal mainboard for building robots. Designed around the xCore development module, it packs everything needed to power, connect, and control a robot into a single board.
| Feature | Details |
|---|---|
| xCore Slot | SODIMM connector for the xCore board — STM32H723 MCU + CM4 + IMU + Gigabit Ethernet Switch |
| Input Voltage | 7V – 32V wide-range input |
| DC/DC Converter | Onboard switching regulator — powers board and peripherals |
| 1x GPS Header | Dedicated connector for GPS/RTK GPS module directly on board. |
| GPIO | General-purpose I/O headers for sensors, actuators, and expansion |
| 2x USB 2.0 | 2x USB 2.0 plugs |
| 2x Gigabit Ethernet | 2x Gigabit Ethernet RJ45 Plugs |
| 5x UART | 5x UART XH plugs with four of them having an additional analog GPIO each. Can be used to conncect hardware like (xESC)[https://github.com/ClemensElflein/xESC], external GPS |
| I2C | 1x XH plug with I2C and one additional analog GPIO. Can be used to connect the (Charger Module)[https://github.com/xtech/hw-charger] |
| Rain Sensor | XH input for a rain sensor |
| 4x Hall Sensor | Hall Sensor input for emergency switches or other 5V switch inputs |
This board is designed to host the xCore — a robotics compute module that combines:
- STM32H723 microcontroller
- Raspberry Pi CM4 slot
- IMU (Inertial Measurement Unit)
- Gigabit Ethernet switch
- SODIMM form factor for easy integration
xCore handles all the heavy lifting. This board gives it power, connectivity, and real-world I/O.
KiCad design files for the PCB and schematics.
hw-universal-logic.kicad_pro — KiCad project
hw-universal-logic.kicad_sch — Root schematic
hw-universal-logic.kicad_pcb — PCB layout
components/ — Component libraries
3d/ — 3D models
Before building a robot from these designs, ensure you are legally permitted to do so in your region. Patents and local laws may apply.
These files are shared as-is, without any warranty — no guarantee of safety, legality, or correct function. You need the technical knowledge to build and operate this safely. The author is not liable for any damage caused by devices built from this project.
Licensed under Creative Commons Attribution 4.0 International.
