Electronic design of an avionics for mini rockets.

• Monitor flight data
  • Acceleration X,Y,Z
  • Rotation X,Y,Z
  • Pressure (for altitude)
  • Video
• Separation sequences (separation of stage 2, of nose, ...)
  • 2-3 Pyro-channels
  • 2-3 Servos control channels
  • Electomagnets ?
  • Valves ?

On top of an ESP32C3 board connect an Extension Board. Both of wich are powered by a mini lithium battery. Other battery for igniter (min 1.5v)

• Connect all the ports from the ESP to the extension board (with pin header ?)
• LED connected to a random port for test (BLINK - also allows to see if µC bugging or lagging)
• Communication I2C with µC
• Battery powered. Option ot charge just before launch (batery pack, umbilical external connector)?
• Switch to turn ON and OFF ? Access from outside the rocket.

• Monitor battery voltage (voltage divider bridge with 2x 100 kohm)
• Connexion for igniter of separation system
  • Know if an igniter is connected or not (VCC to Igniter to Transistor - connexion to GND with 1 mohm and connexion to I/O with 100 kohm)
• Strong connector to avoid unwanted disconnection

• ESP32C3 from seeed https://wiki.seeedstudio.com/XIAO_ESP32C3_Getting_Started/ ![images/ESP32-C3_pin_map-2.png]
• Accelererometer GY521, MPU6050:
  • https://invensense.tdk.com/wp-content/uploads/2015/02/MPU-6000-Datasheet1.pdf
  • https://parsippany.vidyalaya.org/fut102-gy521.pdf
• Power switch for igniter: ZXMS6004FF
  • https://www.diodes.com/assets/Datasheets/ZXMS6004FF.pdf
• Barometric pressure sensor: MS5637
  • https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Data+Sheet%7FMS5637-02BA03%7FB1%7Fpdf%7FEnglish%7FENG_DS_MS5637-02BA03_B1.pdf%7FCAT-BLPS0037
• pins to connect servo
• pins for testing

• I2C protocol: https://en.wikipedia.org/wiki/I%C2%B2C