+[[!meta title="TeleMetrum"]]
# TeleMetrum
This is a recording dual-deploy altimeter for high power model rocketry
For the latest TeleMetrum firmware and related ground station software, please
visit the [AltOS](../AltOS) page on this site.
-These are photos of production version 2.0:
+These are photos of production version 3.0:
-<a href="v2.0/telemetrum-v2.0-th.jpg"> <img src="v2.0/telemetrum-v2.0-th-thumb.jpg"></a>
-<a href="v2.0/telemetrum-v2.0-smt.jpg"> <img src="v2.0/telemetrum-v2.0-smt-thumb.jpg"></a>
+<a href="v3.0/telemetrum-v3.0-th.jpg"> <img src="v3.0/telemetrum-v3.0-th-thumb.jpg"></a>
+<a href="v3.0/telemetrum-v3.0-smt.jpg"> <img src="v3.0/telemetrum-v3.0-smt-thumb.jpg"></a>
+
+v3.0 was introduced in late 2019, and is now available for sale.
## Features ##
* Supports dual deployment (can fire 2 ejection charges)
* 70cm ham-band transceiver for telemetry downlink
* Barometric pressure sensor good to 100k feet MSL
-* 1-axis 105-g accelerometer for motor characterization
+* 1-axis 200-g accelerometer for motor characterization
* On-board, integrated GPS receiver
* On-board non-volatile memory for flight data storage
* USB for power, configuration, and data recovery
### Developer View ###
-* Hardware Features of v2.0
+* Hardware Features of v3.0
* ST Micros [STM32L151](http://www.st.com/internet/mcu/product/248821.jsp) ARM Cortex M3 based Microcontroller
- * TI [CC1120](http://www.ti.com/product/cc1120) High Performance RF Transceiver for Narrowband Systems
+ * TI [CC1200](http://www.ti.com/product/cc1200) Low Power, High Performance RF Transceiver
* 150mA 3.3V LDO regulator
* [Winbond W25Q64CV](http://www.winbond.com/hq/enu/ProductAndSales/ProductLines/FlashMemory/SerialFlash/W25Q64CV.htm) serial flash memory
- * [u-blox](http://www.u-blox.com/) MAX-7Q GPS receiver
+ * [u-blox](http://www.u-blox.com/) MAX-8Q GPS receiver
* on-board passive patch antenna
* async serial interface
* Measurement Specialties [MS5607](http://www.meas-spec.com/product/t_product.aspx?id=8499) Micro Altimeter Module
* Wide range — 120kPa to 1kPa (approximately -1500m to 31000m)
* High precision — 2.4Pa resolution (approximately 20cm at sea level)
* Factory calibrated.
- * Freescale [MMA6555](http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MMA65xx&fsrch=1&sr=1) Single Axis SPI Intertial Sensor
- * +- 105g full-scale
- * on-chip 12-bit digitizer
+ * Analog Devices [ADXL375](https://www.analog.com/en/products/adxl375.html) 3-Axis Digital MEMS Accelerometer
+ * +- 200g full-scale
+ * on-chip digitizer
* Software Features
* Written mostly in C with some ARM assembler
* Runs from on-chip flash, uses on-chip RAM, stores flight data to serial flash
* USB serial emulation for "console" interface
* Tools Used
- * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
+ * [Lepton EDA](https://github.com/lepton-eda/lepton-eda) for schematic capture
+ * [pcb-rnd](http://repo.hu/projects/pcb-rnd/) for PCB layout
* Licenses
* The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
* The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
-Compared with the v1 series, v2 includes a better GPS (uBlox vs
-Skytraq), higher power radio (40mW instead of 10mW), wider range and
-more precise pressure sensor (100k' MSL vs 45k' MSL), larger on-board
-storage (8MB vs 2MB), more precise, wider range accelerometer (12 bits instead of
-10 bits, 105g instead of 70g) and faster processor (32-bit ARM instead
-of 8-bit 8051).
-
-## [Production History](../production) ##
-
-## [Flight Logs](flightlogs) ##
+Compared with v2 series, v3 includes a better GPS (uBlox v8 vs v7),
+the TI CC1200 radio used in our other products instead of the CC1120
+used only in TeleMetrum v2 (more or less the same performance, but one less
+device driver for us to have to worry about!), and more accelerometer
+range with approximately the same precision.
## Videos ##
An outline of the board with drill hole locations is available in
[pdf](../Documents/telemetrum-outline.pdf) format.
-The hardware design current gEDA files are available from
+This board was designed using lepton-eda and pcb-rnd.
+
+The hardware design files are available from
[git.gag.com](http://git.gag.com) in the project
[hw/telemetrum](http://git.gag.com/?p=hw/telemetrum;a=summary).
Work on the next version proceeds on the master branch, with occasional
temporary branches created when Bdale is making some major / speculative
-change. Branched with names like 'v2.0' document what we're actually flying
+change. Branched with names like 'v3.0' document what we're actually flying
on the respective PCB revisions.
For those who don't have ready access to the gEDA suite, here are pdf snapshots
-of the files for Production PCB version 2.0 in more easily readable form.
+of the files for Production PCB version 3.0 in more easily readable form.
-* [schematic](v2.0/telemetrum-sch.pdf)
-* [pcb artwork](v2.0/telemetrum-pcb.pdf)
-* [bill of materials](v2.0/partslist.csv)
+* [schematic](v3.0/telemetrum-sch.pdf)
+* [pcb artwork](v3.0/telemetrum-pcb.pdf)
+* [bill of materials](v3.0/partslist.csv)
Rockets we know of flying with TeleMetrum boards have exceeded 50g acceleration,
been well above Mach 1, and reached altitudes
can be found on the [AltOS](../AltOS) page on this site. Feel free to
download the software and try it before purchasing our hardware!
-## Future Plans ##
-
-Prototypes of v2.0 were flown at Airfest 2013 and everything worked
-great, except that we're not satisfied with the performance of the GPS
-antenna chosen. We hope to resolve that issue soon and should have
-TeleMetrum v2.0 boards for sale shortly.
-
## [History of TeleMetrum](history) ##
projects / web / altusmetrum / blobdiff