X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=TeleMetrum%2Findex.mdwn;h=12c1d714034c2bc9a0fecd84419c6e41fbcb6635;hb=8cfa49fa36cbcd5ca4db67a50707916676c8291b;hp=81a1df8ecce1b3160229daa767be184f399009a1;hpb=149b38fdd2aa7602c1a08ebab3df38d79750d27b;p=web%2Faltusmetrum diff --git a/TeleMetrum/index.mdwn b/TeleMetrum/index.mdwn index 81a1df8..12c1d71 100644 --- a/TeleMetrum/index.mdwn +++ b/TeleMetrum/index.mdwn @@ -103,27 +103,63 @@ 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) in the project hw/telemetrum. 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](../TeleTerra) ground station design. +[git.gag.com](http://git.gag.com) in the project +[hw/telemetrum](http://git.gag.com/?p=hw/telemetrum;a=summary). -For those who don't have ready access to the gEDA suite, here are pdf snapshots -of files in more easily readable form. The schematic and BOM are from the -'nextcut' branch as of 20 April 2009, the artwork is of the v0.1 boards: - -* [schematic](telemetrum.pdf) -* [pcb artwork](telemetrum.pcb.pdf) -* [bill of materials](telemetrum.bom) +Work on the next version proceeds on the master branch, with occasional +temporary branches created when Bdale is making some major / speculative +change. The 'v0.2' and 'v0.1' branches document what we're actually flying +right now on the two 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'. - -Keith has working firmware that has now been flown once and successfully -collected flight data to apogee. The source is also available from -[git.gag.com](http://git.gag.com) in the project fw/altos. Not that actually -building these sources requires a modifified version of sdcc and a set of -helper utilities that we're not publishing since we hope to have the important -bits accepted upstream shortly. Watch this space for more details soon. +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 from the v0.2 branch: + +** [schematic](v0.2/telemetrum.pdf) +** [pcb artwork](v0.2/telemetrum.pcb.pdf) +** [bill of materials](v0.2/partslist.csv) + +* These are 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 v0.1 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.