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 previous production version 3.0, we'll try to get around
11 to taking some v4 photos eventually:
13 <a href="v3.0/telemetrum-v3.0-th.jpg"> <img src="v3.0/telemetrum-v3.0-th-thumb.jpg"></a>
14 <a href="v3.0/telemetrum-v3.0-smt.jpg"> <img src="v3.0/telemetrum-v3.0-smt-thumb.jpg"></a>
16 v4.0 was introduced in 2023, and 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 200-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 v3.0
37 * Atmel SAMD21G17D ARM Cortex M0+ based Microcontroller
38 * TI [CC1200](http://www.ti.com/product/cc1200) Low Power, High Performance RF Transceiver
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-8Q 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 * Analog Devices [ADXL375](https://www.analog.com/en/products/adxl375.html) 3-Axis Digital MEMS Accelerometer
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 * [Lepton EDA](https://github.com/lepton-eda/lepton-eda) for schematic capture
57 * [pcb-rnd](http://repo.hu/projects/pcb-rnd/) for PCB layout
59 * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
60 * The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
62 TeleMetrum v4 early units shipped with uBlox MAX-M8C GPS modules, but we had
63 a low yield on those boards for some reason. Newer units have the MAX-M10S
68 There are a number of TeleMetrum customer and other
69 [videos on YouTube](http://www.youtube.com/results?search_query=telemetrum)
73 There is a single manual for TeleMetrum and all other Altus Metrum products,
74 which is available in [html](../AltOS/doc/altusmetrum.html) and
75 [pdf](../AltOS/doc/altusmetrum.pdf) formats.
77 An outline of the board with drill hole locations is available in
78 [pdf](../AltOS/doc/telemetrum-outline.pdf) format.
80 This board was designed using lepton-eda and pcb-rnd.
82 The hardware design files are available from
83 [git.gag.com](http://git.gag.com) in the project
84 [hw/telemetrum](http://git.gag.com/?p=hw/telemetrum;a=summary).
86 Work on the next version proceeds on the master branch, with occasional
87 temporary branches created when Bdale is making some major / speculative
88 change. Branches/tags with names like 'v4.0' document what we're actually
89 flying on the respective PCB revisions.
91 For those who don't have ready access to the gEDA suite, here are pdf snapshots
92 of the files for Production PCB version 4.0 in more easily readable form.
94 * [schematic](v4.0/telemetrum-sch.pdf)
95 * [pcb artwork](v4.0/telemetrum-pcb.pdf)
96 * [bill of materials](v4.0/partslist.csv)
98 Rockets we know of flying with TeleMetrum boards have exceeded 50g acceleration,
99 been well above Mach 1, and reached altitudes
100 greater than 25k feet AGL with great results. Keith's second generation
101 ground station program called AltosUI works on Windows, Mac, and Linux systems
102 and logs telemetry to disk, displays current and max values for key parameters
103 during flight, includes voice synthesis during the flight so that
104 our eyes can stay on the rockets, and even includes live display of rocket
105 position over moving maps! After flight, altosui can extract the
106 complete flight log from TeleMetrum, can display plots of the data from either
107 the telemetry received by radio or the onboard flight log, can output a kml
108 file for use with [Google Earth](http://earth.google.com), and can also
109 output all the flight data as a csv file for easy import to spreadsheet
110 programs or other analysis tools allowing you to perform whatever
111 custom analysis you can envision! More details on the software,
112 including full source code and pre-built packages
113 can be found on the [AltOS](../AltOS) page on this site. Feel free to
114 download the software and try it before purchasing our hardware!
116 ## [History of TeleMetrum](history) ##