TeleGPS v1.0

These are photos of production version 1.0:

These early boards used a different processor, a transmit-only radio chip, and had a few other minor differences from current boards.

Features

User View

• GPS tracker and logger
• Offers custom digital telemetry, APRS and direction beacons
• 16mW transmit power
• High-dynamics GPS receiver for accurate tracking
• Uses 3.7V Lithium Polymer battery.
• 1.5 x 1.0 inch board designed to fit inside 29mm airframe coupler tube
• 2MB on-board data logging flash
• Built-in USB connection for configuration, data download and battery charging
• 12.3g flight weight (including antenna, excluding any battery)

Developer View

• Hardware Features
  • NXP LPC11U14 System-on-Chip
    • ARM Cortex-M0 MCU
    • 32k Flash
    • 6k RAM
    • USB 2.0
    • 8 12-bit analog inputs
    • I2C, SPI, async serial
    • digital I/O
  • uBlox Max 7Q GPS receiver
  • TI CC115L 70cm transmitter
  • Built-in USB data download and battery charger connection
  • 2MB SPI flash
• Software Features
  • Written mostly in C with some ARM assembler
  • Runs from on-chip flash, uses on-chip RAM, stores tracking data to flash memory part
• Tools Used
  • gEDA for schematic capture and PCB layout
  • GCC compiler and source debugger
• Licenses
  • The hardware is licensed under the TAPR Open Hardware License
  • The software is licensed GPL version 2

Artifacts

There is a single manual for TeleGPS and all other Altus Metrum products, which is available in html and pdf formats.

The hardware design files can be found on git.gag.com in the project hw/telegps.