X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=TeleMetrum%2Findex.mdwn;h=4ec30e7c98a399c4c53cfc696c66d6999cfd7a8a;hb=11265c73c8f52ea5f01eed19c67b8a078ee66fdf;hp=cc4bc5ad9e8975a61e73290a578ad1a33a75cc70;hpb=40ba3168b6fe4c218b5fe65664f96d4295e39f02;p=web%2Faltusmetrum diff --git a/TeleMetrum/index.mdwn b/TeleMetrum/index.mdwn index cc4bc5a..4ec30e7 100644 --- a/TeleMetrum/index.mdwn +++ b/TeleMetrum/index.mdwn @@ -74,9 +74,9 @@ simplify things by building a new altimeter with integrated RF link! * 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) +## [Production History](production) ## -[## Flight Logs ##](flightlogs) +## [Flight Logs](flightlogs) ## ## Problems ## @@ -103,20 +103,55 @@ simplify things by building a new altimeter with integrated RF link! ## Artifacts ## The hardware design current gEDA files are available from -[git.gag.com](http://git.gag.com). The 'fab' tag on the master branch reflects -the artwork as sent out for PCB fab. The 'loaded' tag on the master branch -indicates the parts Bdale loads for a functional board, but the schematic -does not reflect the cuts and jumps or added resistors. The 'nextcut' branch -is work towards our next PCB revision. The 'ground' branch has a cut-down -schematic used to generate the BOM for partially loading boards to use in -the matching TeleTerra ground station design. - -Keith has working data collection firmware, however the firmware is under a -massive, rapid rewrite to eliminate FreeRTOS which is much more generalized -and capable than we need... and consuming more system resources than we -can tolerate. As soon as we're over this transition, the sourcecode to the -firmware and related tools will also be made available. - -As of 11 April 2009, the first two boards are fully checked out, we have some -initial firmware capable of data logging ready, and as soon as we get a good -day to fly we hope to log our first flight data! +[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. The 'v0.1' branch and particularly the 'working-v0.1' tag document +what we're actually flying right now. The 'ground' branch has a cut-down +schematic used to generate the BOM for partially loading boards to use on +the ground. + +For those who don't have ready access to the gEDA suite, here are pdf snapshots +of files in more easily readable form. These are all as of the working-v0.1 +tag: + +* [schematic](v0.1/telemetrum.pdf) +* [pcb artwork](v0.1/telemetrum.pcb.pdf) +* [bill of materials](v0.1/telemetrum.bom) + +We have firmware that works well enough that we now routinely allow TeleMetrum +to control flights by firing ejection charges. We've flown boards in rockets +exceeding 50g acceleration, above Mach 1, and to altitudes greater than 12k +feet AGL with great results. Keith wrote a ground station program called +ao-view that logs telemetry to disk, displays current and max +values for key parameters during flight, and even includes voice synthesis +during the flight so that our eyes can stay on the rockets! We have post +flight analysis software that makes it easy to extract data from the board, +analyze it, and even generate KML files for viewing flights in GoogleEarth! +More details on the software, including full source code and pre-built packages +can be found on the [AltOS](../AltOS) page on this site. + +## Future Plans ## + +Work is underway on a second revision of TeleMetrum with the following changes: + +* stretch board length by 0.25 inches +* adjust USB connector position to be flush with edge of board +* eliminate temperature sensor, since baro sensor is already compensated and there's a sensor on the cc1111 +* eliminate serial port connector +* integrate SkyTraq Venus GPS receiver and patch antenna on-board +* change debug connector to 4 pin Tyco MicroMaTch +* add 8 pin Tyco MicroMaTch connector for companion board interface +* use v_lipo as pyro power, eliminating the huge 1000uF capacitor and instead + adding ballast capacitance on the 3.3V rail to prevent brownouts +* move all connectors, beeper, and GPS patch antenna to the "other side" of the board from the surface mount parts +* add a rectangle of silk screen material for improved serial number labeling + +As of early December 2009, the layout work for v0.2 is done and we're busy +verifying it and deciding exactly how we're going to build them. We hope to +have first prototypes to test in time to show the new version at LCA in late +January 2010. If it works out as well as we hope, v0.2 may be made available +in assembled and tested form to others in the rocketry hobby who have +expressed interest sometime in 2010.