3 This is a recording dual-deploy altimeter for high power model rocketry
4 with integrated GPS and telemetry link.
6 Production units are available from the
7 [Garbee and Garbee](http://auric.gag.com) web
8 store. TeleMetrum starter kits are also available from
9 [Apogee Components](http://www.apogeerockets.com/Altus_Metrum_GPS.asp)
10 and [Australian Rocketry](http://www.ausrocketry.com/shop/index.php?main_page=product_info&cPath=111&products_id=4302).
12 For the latest TeleMetrum firmware and related ground station software, please
13 visit the [AltOS](../AltOS) page on this site.
15 These are photos of our current production version:
17 <a href="v1.1/telemetrum-v1.1-thside.jpg"> <img src="v1.1/telemetrum-v1.1-thside-thumb.jpg"></a>
18 <a href="v1.1/telemetrum-v1.1-smtside.jpg"> <img src="v1.1/telemetrum-v1.1-smtside-thumb.jpg"></a>
24 * Recording altimeter for model rocketry
25 * Supports dual deployment (can fire 2 ejection charges)
26 * 70cm ham-band transceiver for telemetry downlink
27 * Barometric pressure sensor good to 45k feet MSL
28 * 1-axis high-g accelerometer for motor characterization
29 * On-board, integrated GPS receiver
30 * On-board non-volatile memory for flight data storage
31 * USB for power, configuration, and data recovery
32 * Integrated support for LiPo rechargeable batteries
33 * Uses LiPo to fire e-matches, can be factory modified to support separate pyro battery
34 * 2.75 x 1 inch board designed to fit inside 29mm airframe coupler tube
36 ### Developer View ###
39 * [TI CC1111F32](http://focus.ti.com/docs/prod/folders/print/cc1111f32.html) Low Power RF System-on-Chip
40 * Sub-1Ghz transceiver
45 * 6 12-bit analog inputs (11 bits with single-ended sensors)
46 * 2 channels of serial I/O
48 * [Winbond W25Q16](http://www.winbond.com/NR/exeres/A3D21C82-A0B6-4586-A770-2F0883A805FF.htm) serial flash memory
51 * [SkyTraq](http://www.skytraq.com.tw/) Venus634FLPx GPS receiver
52 * on-board [Taoglas AP.17A.01](http://www.taoglas.com/antennas/GPS_Antennas/Internal_GPS_-_Active_Patch_Modules/)
53 single-stage active patch antenna
54 * U.FL connector with 3.3V DC can be re-purposed for optional external amplified antennas
55 * async serial interface
56 * [Freescale MP3H6115A](http://www.freescale.com/webapp/search.partparamdetail.framework?PART_NUMBER=MP3H6115A6U) pressure sensor
57 * [Freescale MMA2202EG](http://www.freescale.com/webapp/search.partparamdetail.framework?PART_NUMBER=MMA2202EG) 50g accelerometer. Can use 40-200g variants!
59 * Written mostly in C with some 8051 assembler
60 * Runs from on-chip flash, uses on-chip RAM, stores flight data to
62 * USB serial emulation for "console" interface
64 * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
65 * [SDCC](http://sdcc.sourceforge.net/) compiler and source debugger
67 * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
68 * The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
70 ## [Production History](../production) ##
72 ## [Flight Logs](flightlogs) ##
76 There is a single manual for TeleMetrum and all other Altus Metrum products,
77 which is available in [html](../AltOS/doc/altusmetrum.html) and
78 [pdf](../AltOS/doc/altusmetrum.pdf) formats.
80 The hardware design current gEDA files are available from
81 [git.gag.com](http://git.gag.com) in the project
82 [hw/telemetrum](http://git.gag.com/?p=hw/telemetrum;a=summary).
84 Work on the next version proceeds on the master branch, with occasional
85 temporary branches created when Bdale is making some major / speculative
86 change. Branched with names like 'v0.2' document what we're actually flying
87 on the respective PCB revisions. The 'ground' branch has a cut-down schematic
88 used to generate the BOM for partially loading v0.1 boards to used on the
89 ground. We call the on-the-ground version '[TeleDongle](../TeleDongle)', and
90 newer versions have their own PCB design.
92 For those who don't have ready access to the gEDA suite, here are pdf snapshots
93 of the files for Production PCB version 1.1 in more easily readable form.
95 * [schematic](v1.1/telemetrum.pdf)
96 * [pcb artwork](v1.1/telemetrum.pcb.pdf)
97 * [bill of materials](v1.1/partslist.csv)
99 Rockets we know of flying with TeleMetrum boards have exceeded 50g acceleration,
100 been well above Mach 1, and reached altitudes
101 greater than 25k feet AGL with great results. Keith's second generation
102 ground station program called AltosUI works on Windows, Mac, and Linux systems
103 and logs telemetry to disk, displays current and max values for key parameters
104 during flight, includes voice synthesis during the flight so that
105 our eyes can stay on the rockets, and even includes live display of rocket
106 position over moving maps! After flight, altosui can extract the
107 complete flight log from TeleMetrum, can display plots of the data from either
108 the telemetry received by radio or the onboard flight log, can output a kml
109 file for use with [Google Earth](http://earth.google.com), and can also
110 output all the flight data as a csv file for easy import to spreadsheet
111 programs or other analysis tools allowing you to perform whatever
112 custom analysis you can envision! More details on the software,
113 including full source code and pre-built packages
114 can be found on the [AltOS](../AltOS) page on this site. Feel free to
115 download the software and try it before purchasing our hardware!
119 TeleMetrum v1.2 is back from our assembler and the first batch are being
120 prepared for sale, hopefully by Christmas day. The significant user-visible
121 change is that we've moved to a 70g accelerometer by default, due to poor
122 availability of the part we previously used due to damage to the Freescale
123 facility in Sendai caused by the Japan earthquake / tsunami. Full details
124 will be posted here when they're available to order.
128 * The CC1111F32 is a 36-pin QFN package, which necessitates reflow
129 soldering. Since we needed to reflow solder anyway, and because TI used
130 them in their reference design, we went a little crazy and used 0402
131 passive parts everywhere. That means working under a microscope to
132 place parts! Without an inspection microscope, loading and testing these
133 boards might be impossible.
135 * The addition of on-board GPS in v0.2 and later boards means that the total
137 can exceed the rate at which we draw power from the USB interface,
138 particularly when the GPS is in cold start mode. This means a battery must
139 be attached during operation, and also that the battery will only charge
140 effectively from USB when the board is turned off.
142 ## [History of TeleMetrum](history) ##