+[[!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 the previous production version (we haven't taken good
-pictures of v1.2 yet):
+These are photos of production version 3.0:
-<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>
+<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 ##
* 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 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
* Integrated support for LiPo rechargeable batteries
-* Uses LiPo to fire e-matches, can be factory modified to support separate pyro battery
+* Uses LiPo to fire e-matches, can be made to support separate pyro battery
* 2.75 x 1 inch board designed to fit inside 29mm airframe coupler tube
### 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 v3.0
+ * ST Micros [STM32L151](http://www.st.com/internet/mcu/product/248821.jsp) ARM Cortex M3 based Microcontroller
+ * 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-8Q 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.
+ * 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 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
+ * [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)
-## [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 ##
which is available in [html](../AltOS/doc/altusmetrum.html) and
[pdf](../AltOS/doc/altusmetrum.pdf) formats.
-The hardware design current gEDA files are available from
+An outline of the board with drill hole locations is available in
+[pdf](../AltOS/doc/telemetrum-outline.pdf) format.
+
+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 'v1.2' 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 1.2 in more easily readable form.
+of the files for Production PCB version 3.0 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](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 ##
-
-TeleMetrum v1.2 is now available for sale. Eventually we'll run out of v1.2
-boards, and by then no dobut we'll have found more things to tweak...
-
## [History of TeleMetrum](history) ##
projects / web / altusmetrum / blobdiff