3 This is a recording dual-deploy altimeter for high power model rocketry
4 with integrated GPS and telemetry link.
6 For the latest TeleMetrum firmware and related ground station software, please
7 visit the [AltOS](../AltOS) page on this site.
9 These are photos of production version 2.0:
11 <a href="v2.0/telemetrum-v2.0-th.jpg"> <img src="v2.0/telemetrum-v2.0-th-thumb.jpg"></a>
12 <a href="v2.0/telemetrum-v2.0-smt.jpg"> <img src="v2.0/telemetrum-v2.0-smt-thumb.jpg"></a>
18 * Recording altimeter for model rocketry
19 * Supports dual deployment (can fire 2 ejection charges)
20 * 70cm ham-band transceiver for telemetry downlink
21 * Barometric pressure sensor good to 100k feet MSL
22 * 1-axis 105-g accelerometer for motor characterization
23 * On-board, integrated GPS receiver
24 * On-board non-volatile memory for flight data storage
25 * USB for power, configuration, and data recovery
26 * Integrated support for LiPo rechargeable batteries
27 * Uses LiPo to fire e-matches, can be made to support separate pyro battery
28 * 2.75 x 1 inch board designed to fit inside 29mm airframe coupler tube
30 ### Developer View ###
32 * Hardware Features of v2.0
33 * ST Micros [STM32L151](http://www.st.com/internet/mcu/product/248821.jsp) ARM Cortex M3 based Microcontroller
34 * TI [CC1120](http://www.ti.com/product/cc1120) High Performance RF Transceiver for Narrowband Systems
35 * 150mA 3.3V LDO regulator
36 * [Winbond W25Q64CV](http://www.winbond.com/hq/enu/ProductAndSales/ProductLines/FlashMemory/SerialFlash/W25Q64CV.htm) serial flash memory
37 * [u-blox](http://www.u-blox.com/) MAX-7Q GPS receiver
38 * on-board passive patch antenna
39 * async serial interface
40 * Measurement Specialties [MS5607](http://www.meas-spec.com/product/t_product.aspx?id=8499) Micro Altimeter Module
41 * Wide range — 120kPa to 1kPa (approximately -1500m to 31000m)
42 * High precision — 2.4Pa resolution (approximately 20cm at sea level)
44 * Freescale [MMA6555](http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MMA65xx&fsrch=1&sr=1) Single Axis SPI Intertial Sensor
46 * on-chip 12-bit digitizer
48 * Written mostly in C with some ARM assembler
49 * Runs from on-chip flash, uses on-chip RAM, stores flight data to serial flash
50 * USB serial emulation for "console" interface
52 * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
54 * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
55 * The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
57 Compared with the v1 series, v2 includes a better GPS (uBlox vs
58 Skytraq), higher power radio (40mW instead of 10mW), wider range and
59 more precise pressure sensor (100k' MSL vs 45k' MSL), larger on-board
60 storage (8MB vs 2MB), more precise, wider range accelerometer (12 bits instead of
61 10 bits, 105g instead of 70g) and faster processor (32-bit ARM instead
64 ## [Production History](../production) ##
66 ## [Flight Logs](flightlogs) ##
70 There are a number of TeleMetrum customer and other
71 [videos on YouTube](http://www.youtube.com/results?search_query=telemetrum)
75 There is a single manual for TeleMetrum and all other Altus Metrum products,
76 which is available in [html](../AltOS/doc/altusmetrum.html) and
77 [pdf](../AltOS/doc/altusmetrum.pdf) formats.
79 The hardware design current gEDA files are available from
80 [git.gag.com](http://git.gag.com) in the project
81 [hw/telemetrum](http://git.gag.com/?p=hw/telemetrum;a=summary).
83 Work on the next version proceeds on the master branch, with occasional
84 temporary branches created when Bdale is making some major / speculative
85 change. Branched with names like 'v2.0' document what we're actually flying
86 on the respective PCB revisions.
88 For those who don't have ready access to the gEDA suite, here are pdf snapshots
89 of the files for Production PCB version 2.0 in more easily readable form.
91 * [schematic](v2.0/telemetrum-sch.pdf)
92 * [pcb artwork](v2.0/telemetrum-pcb.pdf)
93 * [bill of materials](v2.0/partslist.csv)
95 Rockets we know of flying with TeleMetrum boards have exceeded 50g acceleration,
96 been well above Mach 1, and reached altitudes
97 greater than 25k feet AGL with great results. Keith's second generation
98 ground station program called AltosUI works on Windows, Mac, and Linux systems
99 and logs telemetry to disk, displays current and max values for key parameters
100 during flight, includes voice synthesis during the flight so that
101 our eyes can stay on the rockets, and even includes live display of rocket
102 position over moving maps! After flight, altosui can extract the
103 complete flight log from TeleMetrum, can display plots of the data from either
104 the telemetry received by radio or the onboard flight log, can output a kml
105 file for use with [Google Earth](http://earth.google.com), and can also
106 output all the flight data as a csv file for easy import to spreadsheet
107 programs or other analysis tools allowing you to perform whatever
108 custom analysis you can envision! More details on the software,
109 including full source code and pre-built packages
110 can be found on the [AltOS](../AltOS) page on this site. Feel free to
111 download the software and try it before purchasing our hardware!
115 Prototypes of v2.0 were flown at Airfest 2013 and everything worked
116 great, except that we're not satisfied with the performance of the GPS
117 antenna chosen. We hope to resolve that issue soon and should have
118 TeleMetrum v2.0 boards for sale shortly.
120 ## [History of TeleMetrum](history) ##