1 [[!meta title="TeleMetrum"]]
4 This is a recording dual-deploy altimeter for high power model rocketry
5 with integrated GPS and telemetry link.
7 For the latest TeleMetrum firmware and related ground station software, please
8 visit the [AltOS](../AltOS) page on this site.
10 These are photos of production version 2.0:
12 <a href="v2.0/telemetrum-v2.0-th.jpg"> <img src="v2.0/telemetrum-v2.0-th-thumb.jpg"></a>
13 <a href="v2.0/telemetrum-v2.0-smt.jpg"> <img src="v2.0/telemetrum-v2.0-smt-thumb.jpg"></a>
15 Prototypes of v2.0 were flown at Airfest 2013 and everything worked
16 great. TeleMetrum v2.0 is now available for sale.
22 * Recording altimeter for model rocketry
23 * Supports dual deployment (can fire 2 ejection charges)
24 * 70cm ham-band transceiver for telemetry downlink
25 * Barometric pressure sensor good to 100k feet MSL
26 * 1-axis 105-g accelerometer for motor characterization
27 * On-board, integrated GPS receiver
28 * On-board non-volatile memory for flight data storage
29 * USB for power, configuration, and data recovery
30 * Integrated support for LiPo rechargeable batteries
31 * Uses LiPo to fire e-matches, can be made to support separate pyro battery
32 * 2.75 x 1 inch board designed to fit inside 29mm airframe coupler tube
34 ### Developer View ###
36 * Hardware Features of v2.0
37 * ST Micros [STM32L151](http://www.st.com/internet/mcu/product/248821.jsp) ARM Cortex M3 based Microcontroller
38 * TI [CC1120](http://www.ti.com/product/cc1120) High Performance RF Transceiver for Narrowband Systems
39 * 150mA 3.3V LDO regulator
40 * [Winbond W25Q64CV](http://www.winbond.com/hq/enu/ProductAndSales/ProductLines/FlashMemory/SerialFlash/W25Q64CV.htm) serial flash memory
41 * [u-blox](http://www.u-blox.com/) MAX-7Q GPS receiver
42 * on-board passive patch antenna
43 * async serial interface
44 * Measurement Specialties [MS5607](http://www.meas-spec.com/product/t_product.aspx?id=8499) Micro Altimeter Module
45 * Wide range — 120kPa to 1kPa (approximately -1500m to 31000m)
46 * High precision — 2.4Pa resolution (approximately 20cm at sea level)
48 * Freescale [MMA6555](http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MMA65xx&fsrch=1&sr=1) Single Axis SPI Intertial Sensor
50 * on-chip 12-bit digitizer
52 * Written mostly in C with some ARM assembler
53 * Runs from on-chip flash, uses on-chip RAM, stores flight data to serial flash
54 * USB serial emulation for "console" interface
56 * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
58 * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
59 * The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
61 Compared with the v1 series, v2 includes a better GPS (uBlox vs
62 Skytraq), higher power radio (40mW instead of 10mW), wider range and
63 more precise pressure sensor (100k' MSL vs 45k' MSL), larger on-board
64 storage (8MB vs 2MB), more precise, wider range accelerometer (12 bits instead of
65 10 bits, 105g instead of 70g) and faster processor (32-bit ARM instead
68 ## [Production History](../production) ##
70 ## [Flight Logs](flightlogs) ##
74 There are a number of TeleMetrum customer and other
75 [videos on YouTube](http://www.youtube.com/results?search_query=telemetrum)
79 There is a single manual for TeleMetrum and all other Altus Metrum products,
80 which is available in [html](../AltOS/doc/altusmetrum.html) and
81 [pdf](../AltOS/doc/altusmetrum.pdf) formats.
83 An outline of the board with drill hole locations is available in
84 [pdf](../Documents/telemetrum-outline.pdf) format.
86 The hardware design current gEDA files are available from
87 [git.gag.com](http://git.gag.com) in the project
88 [hw/telemetrum](http://git.gag.com/?p=hw/telemetrum;a=summary).
90 Work on the next version proceeds on the master branch, with occasional
91 temporary branches created when Bdale is making some major / speculative
92 change. Branched with names like 'v2.0' document what we're actually flying
93 on the respective PCB revisions.
95 For those who don't have ready access to the gEDA suite, here are pdf snapshots
96 of the files for Production PCB version 2.0 in more easily readable form.
98 * [schematic](v2.0/telemetrum-sch.pdf)
99 * [pcb artwork](v2.0/telemetrum-pcb.pdf)
100 * [bill of materials](v2.0/partslist.csv)
102 Rockets we know of flying with TeleMetrum boards have exceeded 50g acceleration,
103 been well above Mach 1, and reached altitudes
104 greater than 25k feet AGL with great results. Keith's second generation
105 ground station program called AltosUI works on Windows, Mac, and Linux systems
106 and logs telemetry to disk, displays current and max values for key parameters
107 during flight, includes voice synthesis during the flight so that
108 our eyes can stay on the rockets, and even includes live display of rocket
109 position over moving maps! After flight, altosui can extract the
110 complete flight log from TeleMetrum, can display plots of the data from either
111 the telemetry received by radio or the onboard flight log, can output a kml
112 file for use with [Google Earth](http://earth.google.com), and can also
113 output all the flight data as a csv file for easy import to spreadsheet
114 programs or other analysis tools allowing you to perform whatever
115 custom analysis you can envision! More details on the software,
116 including full source code and pre-built packages
117 can be found on the [AltOS](../AltOS) page on this site. Feel free to
118 download the software and try it before purchasing our hardware!
120 ## [History of TeleMetrum](history) ##