Key Features • Board Overview • Specifications • Components • Credits • License

• Triple MCU Architecture: STM32H753VIT6 (MPU), STM32H743VIT6 (TPU), STM32G474RET6 (SPU)
• 6 Pyro Channels: Direct 12V battery connection with fuse protection
• 6 PWM Channels: 2 for TVC (Thrust Vector Control), 4 for fin control
• Advanced Sensors: Triple ICM-45686 IMUs, LIS2MDLTR magnetometer, ICP-20100 & BMP388 barometersters
• GNSS & Communicationtion: NEO-M8U-06B GPS, LoRa RA-02 telemetry, Bluetooth DA14531MOD
• Storage: SD Card + Winbond W25Q256JV flash memory
• Power Management: 7.4V LiPo battery with BQ25703ARSNR charger, USB-C PD support
• 6-Layer PCB: Dedicated power planes and signal routing

Athena is a high-performance flight computer designed for advanced rocketry applications. The board features a sophisticated 6-layer PCB design with dedicated power planes and optimized signal routing.

The board was designed in EasyEDA with careful attention to power distribution and signal integrity:

• Board Size: 80mm × 140mm
• Layer Count: 6 layers
• Thickness: Standard PCB thickness
• Connectors: USB-C, SD Card slot, various headers

• Input Voltage: 7.4V LiPo battery
• Regulated Outputs: 5V, 3.3V
• Charging: USB-C Power Delivery support

• GNSS: NEO-M8U-06B GPS module
• LoRa: RA-02 for long-range telemetry
• Bluetooth: DA14531MOD for local communication
• CAN: TCAN1057AVDRQ1 transceiver
• USB: TUSB2036 USB hub
• UART: Dedicated UART channels for each STM with ESD protection

• MPU (Main Processing Unit): STM32H753VIT6 - Handles sensors and Kalman filtering
• TPU (Telemetry Processing Unit): STM32H743VIT6 - Manages LoRa, SD card, and flash memory
• SPU (Servo Processing Unit): STM32G474RET6 - Controls pyro channels and PWM outputs

• IMU: 3× ICM-45686 (triple redundancy)
• Magnetometer: LIS2MDLTR
• Barometers: ICP-20100, BMP388 (dual redundancy)

• Battery Charger: BQ25703ARSNR
• USB-C PD Controller: TPS25750
• Buck Converters: LM5145RGYR (servo), TPS5430 (3.3V)

• Flash Memory: Winbond W25Q256JV
• SD Card: Standard microSD slot
• GPS: NEO-M8U-06B
• LoRa: RA-02
• Bluetooth: DA14531MOD-00F01002

This project uses:

• EasyEDA - PCB design and schematic capture
• STM32 HAL - Hardware abstraction layer
• JLCPCB - PCB manufacturing and assembly
• Figma - Silkscreen design

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• Tamaki – A cute HackPad

MIT

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