3 This is a very small, baro-only recording dual-deploy altimeter for
4 high power model rocketry with integrated telemetry link.
8 We'd like to fly smaller rockets really high, which motivates an interest
9 in both electronic deployment and radio direction finding for post-flight
16 * Recording altimeter for model rocketry
17 * Supports dual deployment (can fire 2 ejection charges)
18 * 70cm ham-band transceiver for telemetry downlink
19 * Barometric pressure sensor good to 45k feet MSL
20 * Designed to use a single LiPo rechargeable battery
21 * 1.5 x 0.5 inch board designed to fit inside 18mm airframe coupler tube
23 ### Developer View ###
26 * [TI CC1111F32](http://focus.ti.com/docs/prod/folders/print/cc1111f32.html) Low Power RF System-on-Chip
27 * Sub-1Ghz transceiver
32 * 6 12-bit analog inputs (11 bits with single-ended sensors)
33 * 2 channels of serial I/O
35 * [Freescale MP3H6115A](http://www.freescale.com/webapp/search.partparamdetail.framework?PART_NUMBER=MP3H6115A6U) pressure sensor
37 * Written mostly in C with some 8051 assembler
38 * Runs from on-chip flash, uses on-chip RAM, stores flight data to
39 upper blocks of on-chip flash
41 * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
42 * [SDCC](http://sdcc.sourceforge.net/) compiler and source debugger
44 * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
45 * The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
49 The design files can be found on [git.gag.com](http://git.gag.com) in the
50 project [hw/telemini](http://git.gag.com/?p=hw/telemini;a=summary).
54 Initial hardware prototypes are assembled and working. Firmware is under
55 development. We do not yet know what these will cost or when they might go