TeleMini

This is a very small, baro-only recording dual-deploy altimeter for model rocketry with integrated telemetry link.

Version 3.0 is back from fabrication and are ready for sale. Units are available from the Garbee and Garbee web store.

For the latest TeleMini firmware and related ground station software, please visit the AltOS page on this site.

Here's two photos of v3.0, top and bottom:

Features

User View

Recording altimeter for model rocketry
Supports dual deployment (can fire 2 ejection charges)
70cm ham-band transceiver for telemetry downlink
Barometric pressure sensor good to 100k feet MSL
Designed to use a single LiPo rechargeable battery
512kB flight data storage
1.7 x 0.5 inch board designed to fit inside 18mm airframe coupler tube

Developer View

Hardware Features
- ST STM32F042G6 system on chip
  - ARM Cortex-M0 MCU
  - 32k Flash
  - 6k RAM
  - USB 2.0
  - digital I/O
- TI CC1200 High Performance RF Transceiver for Narrowband Systems
- Measurement Specialties MS5607 pressure sensor
- Macronix MX25L4006E 512kB serial flash memory
Software Features
- Written mostly in C with some ARM assembler
Tools Used
- gEDA for schematic capture and PCB layout
- SDCC compiler and source debugger
Licenses
- The hardware is licensed under the TAPR Open Hardware License
- The software is licensed GPL version 2 or later

Older Versions

Version 1.0. Same width (0.5 inches), but doesn't have the rear two mounting holes so it's a bit shorter (1.5 inches instead of 1.67 inches).

Artifacts

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

An outline of the board with drill hole locations is available in pdf format.

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

For those who don't have ready access to the gEDA suite, here are pdf snapshots of the files for Production PCB version 3.0 in more easily readable form.