Skip to content

Fork. A flight computer for high-powered rockets based on the Teensy platform. 4 programmable pyro outputs, Mach immune flight events, air-start & two-stage capable w/ tilt-sensing safety features, GPS & live telemetry. High-rate data logging at 1000 samples per second. 4.0in x 1.25in x 0.5in fits in a 38mm tube coupler.

License

Notifications You must be signed in to change notification settings

werocketry/HPR-Flight-Computer

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Repository files navigation

Builds on HPR Rocket Flight Computer by SparkyVT

DESCRIPTION

This flight computer is designed for rockets 38mm in diameter or greater, and will fit inside a 38mm tube coupler.
Dimensions: 4.0in x 1.25in x 0.5in, antenna configuration may add more length
It has similar capability as a TeleMega, but without a smart-phone app or advanced interfaces
Flight-tested on multiple M-and-N powered supersonic flights to over 34K feet and Mach 2.3.
For large or high-power projects, a commercially available backup computer is strongly recommended.

FEATURES

  • Full-featured dual deploy/multi-stage/airstart rocket flight computer capable to 100,000ft or more
  • Tilt-sensing lockout for ignition of second stages and/or airstarts
  • Live telemetry over 433MHz or 915MHz LoRa (433MHz: USA amateur 70cm band, EUR license free) (915MHz: USA license free)
  • 4 high-current pyro outputs with continuity checks
  • Advanced MEMS sensor package: GNSS, accelerometers, gyroscope, magnetometer, barometer, and LoRa radio
  • High Data-Capture rate: approximately 50,000 samples per second recorded to SD card
    • 1000Hz 3-axis digital 24G and 100G accelerometer data logging
    • 1000Hz 3-axis digital 2000dps gyroscope data logging
    • 1000Hz of flight events & continuity data logging
    • 1000Hz of sensor-fuzed speed & altitude
    • 100Hz of pitch, yaw, roll rotation
    • 40Hz of magnetic data logging and magnetic roll
    • 30Hz-100Hz of digital barometric data logging (Altitude, pressure, temperature)
    • 30Hz of main battery voltage (1400Hz during pyro events)
    • 20Hz of LoRa telemetry output (time, event, acceleration, speed, altitude, rotation, GNSS position, signal strength)
    • 5Hz-25Hz of GNSS data logging (chip-dependent data rates & constellations)
    • Separate data file for each flight up to 100 flights
    • Optional separate GNSS NMEA capture file for plotting in Google Earth, UBLOX NEO-M9N configuration approved for TRA altitude record attempts
  • Simple, easy-to-use configuration interface through the SD card
    • User Selectable Flight Mode: Single-Stage, Two-Stage, Airstart, or Booster
    • Configurable Apogee delay
    • Optional Audible Battery Voltage report at startup
    • Optional Magnetic Switch Startup & Shut-down
    • Preflight audible reporting options: Perfectflight or Marsa
    • User selectable telemetry frequency & power settings
    • 8 configurable servo outputs (4 powered, 4 un-powered)
    • User selectable inflight brownout recovery
  • Mach immune, sensor-fusion based apogee event
  • Barometric based main deploy event
  • Audible pre-flight continuity report
  • Audible Post-flight max altitude & speed report
  • Mount in any orientation, automatic orientation detection with built-in self calibration mode
  • Bench-test mode activated w/ tactile button; user configurable status messages over USB Serial
  • Report in SI or Metric units
  • Compatible with Teensy 3.2, 3.5, 3.6, 4.0, 4.1
    • Connect any sensor to any available I2C or SPI bus
    • Create your own custom setup with configurable pins for continuity, firing, and servos
    • Connect UBLOX GPS unit to any available HW Serial port

FLIGHT COMPUTER COMPONENTS

  • Microprocessor: Teensy 4.1, 3.5, or 3.6 (compatible with provided PCB file) or Teensy 4.0/3.2 (no PCB file provided)
  • IMU: LSM6DS0X (recommended), LSM9DS1, LSM6DS33, MPU6050, or LSM303 & L3GD20H combo
  • Magnetometer: LIS3MDL (recommended), LSM9DS1, or LSM303
  • 100G Accelerometer: H3LIS331DL (recommended), ADXL377, or ADXL377 & ADS1115 combo
  • Pressure Sensor: MS5611 (recommended), MS5607, MPL3115A2, BMP180, BMP280, or BMP388 (Note: BMP280 & BMP388 incompatible with telemetry due to EMI)
  • GNSS: UBLOX M6, M7, M8, M9 (NEO footprint supported in PCB file) or Adafruit Ultimate GPS
  • LoRa Telemetry: RFM96W or RFM95W, both capable of TX on 433MHz or 915MHz (433MHz USA: Amateur License Required, EUR: License Free)

GROUND STATION COMPONENTS

  • MCU: Arduino Nano 33 BLE
  • Telemetry: RFM96W 433MHz (USA: Ham License Required, EUR: License Free) or RFM95W 915MHz (USA: License Free)
  • GPS: Ublox SAM-M8Q (optional)
  • IMU: Sparkfun LSM9DS1 breakout
  • LCD: 20X4 Sparkfun LCD
  • SD Card: Adafruit SD Card breakout board
  • Antenna: 433Mhz 5-element Yagi (Ham Only) or 900Mhz (License Free)

ADDITIONAL LIBRARIES REQUIRED

  • TinyGPS++
  • SDfat and/or SD

HARDWARE OPTIONS

  • OPTION 1: Assemble the unit yourself. Purchase a Teensy 4.0 or 4.1 and integrate the system with commercially available sensor breakout boards. If you want to use high-current pyro outputs, then it is up to you to develop the continuity and firing circuitry. I have threaded standoffs and screws that are a perfect fit for the Adafruit breakout boards.
  • OPTION 2: Contact me for a custom Teensy breakout board and add your own sensors. The breakout includes a Teensy 4.1, integrates 4x high-current pyro outputs, and 6 easy-to-use terminal blocks to integrate into your high-power rocket. Includes Qwiic connector to easily integrate your custom sensor package over I2C.
  • OPTION 3: Contact me for a fully-functional Frankenstein-board. This integrates all sensors breakout boards onto a single main board that is 4.0 x 1.25 x 0.5 inches. Comes fully assembled, pre-programmed, calibrated, and tested. Configurations will vary, but quality will not.
  • OPTION 4: Try your hand at assembling the Frankenstein-board yourself. This is a single bare-board with no breakouts attached. You will need to reflow the GNSS chip and hand-solder approximately 30 components. Instructions included. Contact me for for a bare-board.
  • OPTION 5: Contact me for a fully assembled and tested ground station. Includes ground unit with 2 radios and 20x4 LCD mounted in a custom form-fitting box.

About

Fork. A flight computer for high-powered rockets based on the Teensy platform. 4 programmable pyro outputs, Mach immune flight events, air-start & two-stage capable w/ tilt-sensing safety features, GPS & live telemetry. High-rate data logging at 1000 samples per second. 4.0in x 1.25in x 0.5in fits in a 38mm tube coupler.

Resources

License

Stars

Watchers

Forks

Releases

No releases published

Packages

No packages published