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
- Atmel ATmega32U4 Microcontroller
- 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.