Core/Sensor PCB of the Auxspace Avionics stack, built around an ESP32-S3-WROOM-1.
AUX-Core is based on µMETER and extends it by a high-G accelerometer, a magnetometer, 9 V USB Power Delivery and the stack connector that interfaces the board with the other PCBs of the avionics stack.
- Barometer DPS310 for altitude computation
- IMU STM LSM6DSO32X for acceleration and rotation data
- High-G accelerometer ADXL375 (±200 g) for launch and recovery events
- Magnetometer Melexis MLX90395 for attitude reference
- Buzzer for easier commissioning and recovery
- CAN bus (TCAN334) for communication with the other stack PCBs
- µSD card for logging
- USB-C with 9 V Power Delivery (CH224A sink) for programming, debugging and supply
- Stack connector Samtec TFM-110-02-S-D-A / SFM-110-02-L-D-A for the avionics stack
- Status LEDs for power, SD activity and board state
The board carries a mating Samtec pin/socket pair (2x10, 1.27 mm), so Core boards and expansion PCBs stack directly on top of each other. The connector routes the switched and unswitched VBus rails, CAN, I²C, UART and the ARM signal through the stack.
The board is supplied over USB-C. The CH224A PD sink negotiates 9 V from the charger; the on-board TPS7B8601 regulator derives the 3V3 rail from it. VBus is distributed to the stack both directly and through the switched rails.
The ESP32-S3 is programmed via USB-C or the UART connection. To enter download mode, press and hold BOOTSEL at startup.
| Folder | Content |
|---|---|
1_Blockschaltbild |
Block diagrams |
2_Designunterlagen |
Pin maps, calculations and design documents |
3_Elektronik |
KiCad project, symbols, footprints and 3D models |
4_Simulationen |
LTspice simulations |
5_Tests |
Test results and oscillograms |
6_Export-Fertigungsdaten |
Manufacturing data, BOMs, schematics and STEP files |
Hardware is released under the CERN Open Hardware Licence Version 2 - Permissive,
see LICENSE.