A simple high-powered rocket altimeter and flight computer, developed for UNH SEDS, appropriately named after both the moon of Jupiter as well as I/O. Io features a custom-designed PCB (made with the help of guides at Phils Lab). This repository contains the board designs, firmware source, and some simple avionics bay (avbay) models
The flight computer is designed to monitor the altitude of a high-powered rocket, triggering ejection charges at set points in the flight profile (typically a drogue chute at apogee, and a main chute at 1000ft AGL). Additionally, the computer is meant to instrumentation data to an SD card, and transmit telemetry to a ground station over a 915MHz LoRA link provided by a RFM95W module. Firmware is currently in-progress, but the board has been fabricated, and all components besides some instruments have been installed.
Left: PCB Designs for v1, Right: v1 production board, powered on
- Finish initial firmware
- Implement and test telemetry link
- Implement altimeter instrumentation and ejection charge events
- Log to SD card
- Implement gyroscope/accelerometer measurements and state estimation
- Strict 3.3v linear power regulation (sorry, buck converter)
- Better external interface connectors
- IO wire for serial debug printf (no more breakpoints)
- Battery level monitoring
- Buzzer for audible feedback
- Ground connection for arming switch
- Reverse-voltage protection on pyros
- Integrated pyro resistors
- Neater PCB layout