croi

The heart of the flight computer

1. The Core (Flight Controller)

• Owner: Kyle

• Philosophy: "Croí " (heart) Small, dense, critical.

• Use Case: Controls L2 recovery (when stacked with Power Sled) OR acts as a standalone data logger for L1 flights.

• Capabilities: Standalone Operation. Includes a local LDO to run directly off a small LiPo battery without the Power Sled.

• Components:

  • MCU: STM32F411CEU6 (High Performance, FPU, Internal CAN Controller).
  • Memory: W25N01GV (1Gb SPI NAND Flash) - Vibration proof logging.
  • Sensors: BMP390 (Altimeter) + LSM6DSO32 (IMU) + BME680 (Env) + ADXL375 (accelerometer)
  • LDO: TLV70433DBVT, fixed 3.3v.
  • Interface: USB-C (Data dump), Buzzer, RGB LED.
  • Comms: TJA1051 CAN Transceiver.
  • Power Logic:
    • Primary: +5V_LOGIC from stack.
    • Standalone Backup: 2-pin JST connector (for 3.7V LiPo).
    • Protection: Schottky Diodes are required to OR the stack power and JST power, preventing back-flow.

• Note: No Pyros on this board. We keep the high-current noise away from the processor.

  • Note: Pre-flight Settings configured via commands received by the Teachtaire board.