This is a recording dual-deploy altimeter for high power model rocketry
with integrated GPS and telemetry link.
-Production units are available from the
-[Garbee and Garbee](http://auric.gag.com) web
-store. TeleMetrum starter kits are also available from
-[Apogee Components](http://www.apogeerockets.com/Altus_Metrum_GPS.asp)
-and [Australian Rocketry](http://www.ausrocketry.com/shop/index.php?main_page=product_info&cPath=111&products_id=4302).
-
For the latest TeleMetrum firmware and related ground station software, please
visit the [AltOS](../AltOS) page on this site.
-These are photos of our current production version:
+These are photos of the previous production version (we haven't taken good
+pictures of v1.2 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>
* 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 high-g accelerometer for motor characterization
+* 1-axis 70-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
* U.FL connector with 3.3V DC can be re-purposed for optional external amplified antennas
* async serial interface
* [Freescale MP3H6115A](http://www.freescale.com/webapp/search.partparamdetail.framework?PART_NUMBER=MP3H6115A6U) pressure sensor
- * [Freescale MMA2202EG](http://www.freescale.com/webapp/search.partparamdetail.framework?PART_NUMBER=MMA2202EG) 50g accelerometer. Can use 40-200g variants!
+ * [Analog Devices ADXL78](http://www.analog.com/en/mems-sensors/inertial-sensors/adxl78/products/product.html) 70g accelerometer.
* Software Features
* Written mostly in C with some 8051 assembler
* Runs from on-chip flash, uses on-chip RAM, stores flight data to
## [Flight Logs](flightlogs) ##
+## Videos ##
+
+There are a number of TeleMetrum customer and other
+[videos on YouTube](http://www.youtube.com/results?search_query=telemetrum)
+
## Artifacts ##
There is a single manual for TeleMetrum and all other Altus Metrum products,
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 'v0.2' document what we're actually flying
-on the respective PCB revisions. The 'ground' branch has a cut-down schematic
-used to generate the BOM for partially loading v0.1 boards to used on the
-ground. We call the on-the-ground version '[TeleDongle](../TeleDongle)', and
-newer versions have their own PCB design.
+change. Branched with names like 'v1.2' 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 1.1 in more easily readable form.
+of the files for Production PCB version 1.2 in more easily readable form.
-* [schematic](v1.1/telemetrum.pdf)
-* [pcb artwork](v1.1/telemetrum.pcb.pdf)
-* [bill of materials](v1.1/partslist.csv)
+* [schematic](v1.2/telemetrum.pdf)
+* [pcb artwork](v1.2/telemetrum.pcb.pdf)
+* [bill of materials](v1.2/partslist.csv)
Rockets we know of flying with TeleMetrum boards have exceeded 50g acceleration,
been well above Mach 1, and reached altitudes
## Future Plans ##
-TeleMetrum v1.2 is back from our assembler and the first batch are being
-prepared for sale, hopefully by Christmas day. The significant user-visible
-change is that we've moved to a 70g accelerometer by default, due to poor
-availability of the part we previously used due to damage to the Freescale
-facility in Sendai caused by the Japan earthquake / tsunami. Full details
-will be posted here when they're available to order.
-
-## Problems ##
-
-* The CC1111F32 is a 36-pin QFN package, which necessitates reflow
- soldering. Since we needed to reflow solder anyway, and because TI used
- them in their reference design, we went a little crazy and used 0402
- passive parts everywhere. That means working under a microscope to
- place parts! Without an inspection microscope, loading and testing these
- boards might be impossible.
-
-* The addition of on-board GPS in v0.2 and later boards means that the total
- power consumption
- can exceed the rate at which we draw power from the USB interface,
- particularly when the GPS is in cold start mode. This means a battery must
- be attached during operation, and also that the battery will only charge
- effectively from USB when the board is turned off.
+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