TelePyro

This is an 8-channel pyro expansion board for TeleMetrum.

Motivation

It would be nice to support more than the 2 channels of igniter control included in the stock TeleMetrum design, so that we can fly more complex projects involving staging, air starts, and backup ejection charges.

Features

User View

  • Small circuit board mounted near TeleMetrum
  • Requires TeleMetrum v0.2 or later, as v0.1 does not have the required companion board interface
  • Connections for 8 distinct igniter firing channels provided
  • Supports use of separate battery for ejection charges

Developer View

  • Hardware Features
    • Atmel ATmega32U4 Microcontroller
      • 32k Flash
      • 2.5k + 832 bytes SRAM
      • 1k EEPROM
      • 12-channel 10-bit ADC
      • SPI target interface
      • USB interface which can be used for programming
      • In-system programming interface
    • Honeywell HMC5843 3-axis magnetic flux sensor
  • Software Features (planned)
    • programmed in C using gcc-avr
    • Runs from on-chip flash, uses on-chip RAM
  • Tools Used
    • gEDA for schematic capture and PCB layout
  • Licenses

Artifacts

A schematic and PC board design exist on git.gag.com in the project hw/telepyro, but no prototypes have been built yet.

Future Plans

As of late September 2011, v0.1 prototype boards are loaded and under test.

Most prototypes of TelePyro were lost in the Black Forest Fire, we hope to get back to this project someday.