# TeleMini

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

## Motivation ##

We'd like to fly smaller rockets really high, which motivates an interest
in both electronic deployment and radio direction finding for post-flight
rocket recovery.

## 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 45k feet MSL
* Designed to use a single LiPo rechargeable battery
* 1.5 x 0.5 inch board designed to fit inside 18mm airframe coupler tube

### Developer View ###

* Hardware Features
	* [TI CC1111F32](http://focus.ti.com/docs/prod/folders/print/cc1111f32.html) Low Power RF System-on-Chip
		* Sub-1Ghz transceiver
		* 8051 MCU
		* 32k Flash
		* 4k RAM
		* USB 2.0
		* 6 12-bit analog inputs (11 bits with single-ended sensors)
		* 2 channels of serial I/O
		* digital I/O
	* [Freescale MP3H6115A](http://www.freescale.com/webapp/search.partparamdetail.framework?PART_NUMBER=MP3H6115A6U) pressure sensor
* Software Features
	* Written mostly in C with some 8051 assembler
	* Runs from on-chip flash, uses on-chip RAM, stores flight data to
		upper blocks of on-chip flash
* Tools Used
	* [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
	* [SDCC](http://sdcc.sourceforge.net/) compiler and source debugger
* Licenses
	* The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
	* The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)

## Artifacts ##

The design files can be found on [git.gag.com](http://git.gag.com) in the 
project [hw/telemini](http://git.gag.com/?p=hw/telemini;a=summary).  

## Future Plans ##

Initial hardware prototypes are assembled and working.  Firmware is under
development.  We do not yet know what these will cost or when they might go
into production.