3 This is a very small, baro-only recording dual-deploy altimeter for
4 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. We've flown a number
55 flights now, with great results. Work remains to stabilize the firmware and
56 associated ground software updates, particularly because we've made a major
57 update to the telemetry protocol to more easily handle multiple products.
59 The first production hardware build is underway, and we expect to have
60 TeleMini for sale sometime in August 2011, with plenty on hand to sell at
61 [LDRS 30](http://ldrs30.org/) in early September!