visit the [AltOS](../AltOS) page on this site.
These are photos of the previous production version (we haven't taken good
-pictures of v1.2 yet):
+pictures of v2.0 yet):
<a href="v1.1/telemetrum-v1.1-thside.jpg"> <img src="v1.1/telemetrum-v1.1-thside-thumb.jpg"></a>
<a href="v1.1/telemetrum-v1.1-smtside.jpg"> <img src="v1.1/telemetrum-v1.1-smtside-thumb.jpg"></a>
* Recording altimeter for model rocketry
* Supports dual deployment (can fire 2 ejection charges)
* 70cm ham-band transceiver for telemetry downlink
-* Barometric pressure sensor good to 45k feet MSL
-* 1-axis 70-g accelerometer for motor characterization
+* Barometric pressure sensor good to 100k feet MSL
+* 1-axis 105-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
- * [TI CC1111F32](http://focus.ti.com/docs/prod/folders/print/cc1111f32.html) Low Power RF System-on-Chip
- * Sub-1Ghz transceiver
- * 8051 MCU
- * 32k Flash
- * 4k RAM
- * USB 2.0
- * 6 12-bit analog inputs (11 bits with single-ended sensors)
- * 2 channels of serial I/O
- * digital I/O
- * [Winbond W25Q16](http://www.winbond.com/NR/exeres/A3D21C82-A0B6-4586-A770-2F0883A805FF.htm) serial flash memory
- * 2M x 8
- * SPI interface
- * [SkyTraq](http://www.skytraq.com.tw/) Venus634FLPx GPS receiver
- * on-board [Taoglas AP.17A.01](http://www.taoglas.com/antennas/GPS_Antennas/Internal_GPS_-_Active_Patch_Modules/)
- single-stage active patch antenna
- * U.FL connector with 3.3V DC can be re-purposed for optional external amplified antennas
+* Hardware Features of v2.0
+ * 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
+ * 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
+ * on-board passive patch antenna
* async serial interface
- * [Freescale MP3H6115A](http://www.freescale.com/webapp/search.partparamdetail.framework?PART_NUMBER=MP3H6115A6U) pressure sensor
- * [Analog Devices ADXL78](http://www.analog.com/en/mems-sensors/inertial-sensors/adxl78/products/product.html) 70g accelerometer.
+ * 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
* Software Features
- * Written mostly in C with some 8051 assembler
- * Runs from on-chip flash, uses on-chip RAM, stores flight data to
- serial DataFlash chip
+ * 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
- * [SDCC](http://sdcc.sourceforge.net/) compiler and source debugger
* 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) ##
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 'v1.2' document what we're actually flying
+change. Branched with names like 'v2.0' 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 1.2 in more easily readable form.
+of the files for Production PCB version 2.0 in more easily readable form.
-* [schematic](v1.2/telemetrum.pdf)
-* [pcb artwork](v1.2/telemetrum.pcb.pdf)
-* [bill of materials](v1.2/partslist.csv)
+* [schematic](v2.0/telemetrum-sch.pdf)
+* [pcb artwork](v2.0/telemetrum-pcb.pdf)
+* [bill of materials](v2.0/partslist.csv)
Rockets we know of flying with TeleMetrum boards have exceeded 50g acceleration,
been well above Mach 1, and reached altitudes
## Future Plans ##
-Our inventory of TeleMetrum v1.2 boards was lost in the fire that destroyed
-Bdale's home in June 2013. Work is progressing on "TeleMetrum 2.0" which will
-be connector placement and screw hole compatible with previous boards, but
-built with entirely new circuitry. Better sensors, better processor, better
-GPS, better radios, etc. Prototypes were flown at Airfest and everything
-worked great, except that we're not satisfied with the performance of the
-GPS antenna chosen. We hope to resolve that issue in time to have TeleMetrum
-v2.0 boards for sale by the end of 2013.
+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