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
  • The hardware is licensed under the TAPR Open Hardware License
  • The software is licensed GPL version 2

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.