altusmetrum August 2015

altusmetrum@lists.gag.com

11 participants
8 discussions

group project for Thunda in 2015?

by Bdale Garbee

Keith and I both hope to be able to attend "Thunda Down Under"[1] in 2015, and I've sent the organizers email requesting information on what it takes to be treated as an on-site vendor. Of course, it's always more fun to be at a launch when you have something interesting to fly! Thus, while Keith and I might each show up with a modest "travel rocket" of some sort... I've started pondering possible larger "Altus Metrum" group projects. Since transporting a large airframe to Australia would be a hassle, I wonder if a group project to build an airframe in-country makes more sense? To that end, I'd be pleased to know if any of our friends and customers in Australia want to sign up to help with such a project? My thoughts would be to engage in some group-think about project scope and goals, then hope friends in-country would take on the sourcing and preparation of suitable airframe materials. Depending on who wants to participate and how tasks get taken up, we might plan to arrive a bit early to help with any final assembly or other preparations, installation of suitably fresh Altus Metrum electronics, etc. So, to all our Aussie friends... does this sound like fun? If so, please chime in with a reply. I don't expect the email associated with such a project to be too heavy a load for this list to carry, but we can always spawn a dedicated lists.gag.com list if I'm wrong. Regards, Bdale [1] http://thunda.com.au/

5 years, 10 months

Re: [altusmetrum] Tele BT

by Kevin Trojanowski

When a Telemetrum or TeleMega are in launch mode, they're transmit only so you should be able to receive packets on both your laptop and phone at the same time. -Kevin -----Original Message----- From: altusmetrum [mailto:altusmetrum-bounces@lists.gag.com] On Behalf Of Tim Navickas Sent: Thursday, July 30, 2015 7:11 PM To: 'Altus Metrum' Subject: [altusmetrum] Tele BT This may be a dumb question but is there anywhere that describes how to know when the TeleBT is fully charged? Also, Can a TeleBT be connected to the Telemtrum via phone and at the same time a teledongle be connected to the same Telemetrum via computer? Thanks, Tim _______________________________________________ altusmetrum mailing list altusmetrum(a)lists.gag.com http://lists.gag.com/mailman/listinfo/altusmetrum

7 years, 4 months

TeleMega barometric altitude vs GPS Height

by David Abmayr

Which is a more accurate measure of altitude on a TeleMega, barometric altitude or GPS height (at ~10k ft)? David

7 years, 6 months

AltosDroid

by Steven Saner

Hi. A month or so ago I saw your announcement of an updated beta version of the AltosDroid app. I downloaded that. I'm wondering if there have been any versions newer than that. The following build information is at the bottom of the version that I have: Version: 1.6.1 Built: 2015-07-15 17:52 -0700 (master--271f56a) There are a couple issues that I have with this version on my Samsung Galaxy S4 On the "Load Maps" feature, it is impossible to enter in GPS coordinates because when I try to edit that field, the keypad that comes up doesn't have a decimal point key. There is also no negative sign key (-). So about the only way to put in a GPS coordinate is to cut and paste from some other place. Is the keypad specific to my phone, and if so, do you know how I can adjust that? Also, related to the maps, is there any way to specify a GPS location, load a map, and then give that a name and save it for later use? I haven't found a way. Is this a planned or a possible feature? Anyway, I'm hoping to use this app next weekend and want to make sure I have the newest/best version. Steve -------------------------------------------------------------------------- Steven Saner <steve(a)saner.net> KD0IJP Andover, Kansas USA

7 years, 6 months

Arduino Companion Info

by Rob Derstadt

I've been playing around with the companion board support on the TeleMetrum (using an Arduino) and have put some code/notes up on GitHub for anyone else who might find it useful. It's not highly polished, but works (at least on my desk!). https://github.com/robderstadt/AltOSCompanion -Rob

7 years, 6 months

Re: [altusmetrum] TeleGPS Version 1.6.1 and Windows 7 Issue

by Kevin Trojanowski

Run it from a command line and see what error Java is providing. -Kevin -----Original Message----- From: altusmetrum [mailto:altusmetrum-bounces@lists.gag.com] On Behalf Of W7AMI Sent: Thursday, August 20, 2015 5:25 PM To: altusmetrum(a)lists.gag.com Subject: [altusmetrum] TeleGPS Version 1.6.1 and Windows 7 Issue I installed TeleGPS version 1-6-1 on my Win 7 machine after first uninstalling the previous version. It installed with out problems but when I try to run the program nothing happens. No window, no nothing! The previous version was working fine before I uninstalled it. Same thing for AltOS. Ideas of what to do next? Terry _______________________________________________ altusmetrum mailing list altusmetrum(a)lists.gag.com http://lists.gag.com/mailman/listinfo/altusmetrum

7 years, 7 months

Companion board telemetry support deprecated?

by Rob Derstadt

Hi Bdale or Keith, I managed to build a companion board for my telemetrum based off the documentation posted here: http://altusmetrum.org/AltOS/doc/companion.html I've confirmed with a logic analyzer it's actually doing the setup dance and fetching data from my arduino board (I was actually pretty stoked to get this far). However, the companion telemetry does not show up in the AltoOS UI. I'm running 1.4.1 on my telemetrum, but the latest AltOS. I took a look at the source and it appears that companion support has been commented out (see line 72 of altoslib/AltosTelemetryStandard.java). Looking at the release notes for 1.5 it says "Add lower telemetry data rates (2400 and 9600 bps) to increase telemetry radio range. This *reduces the amount of data received* as well as increasing battery consumption in the transmitter." Is this the reason it was removed? Is there any harm in adding it back? If I upgrade my telemetrum do I also loose companion support at the device level? Thanks. Best regards, Rob

7 years, 7 months

3D Models of TeleMega & EasyMega

by Casey Barker

This season, I decided to make 3D-printable avionics bays for our 100K' airframes (75 mm sustainer, 98 mm booster). Once printed, they make assembly much less tedious, as they have mounting holes, standoffs, and LiPo cavities built-in. To get started, I first had to build solid models of the flight computers to test fits and clearances, so I thought others on this list might find them useful. Specifically, I made models of the EasyMega, TeleMega, and stock LiPo cells. I built the models in SolidWorks, but also exported them as STL files. I've shared these in a Google Drive folder <https://drive.google.com/folderview?id=0B7wR-btf10NSfk5sM2hEZURNajZGVGgwM0p…> (along with some other parts). I doubt anybody would want the print models, as they're very specific to these rockets (and they're my first foray into SolidWorks and 3D printing, so they're not great). However, to give you a feel for it, here's the 75 mm rendering. The printed part is a single piece mounted to the thrust plate. It's designed to slide over a 3/8" center rod running down through the thrust plate, so the recovery harness is firmly mounted to the motor. The airframe is just a sleeve over the whole thing, attached only by screws into the thrust plate. Each bay has an EasyMega, a TeleMega, and a set of screw-switches. The back side has a HackHD camera on a spring mount, so the lens pops up flush with the airframe after its inserted. The pushbutton starts the camera and has an LED for status. [image: av-bay_75.png] And here's how they turn out in real life. (The naked bay is actually the 98 mm version, the assembled is the 75.) The top fiberglass bulkhead is sandwiched by nuts on the center rod, so there's no strain on the 3D plastics, and an o-ring seals the bulkhead to the airframe to keep the BP residue out: So far, the bays have performed well. In hard landings, they just bend and crack, at which point I print new ones. I could beef them up, but I haven't decided whether cracking is a desirable feature, since it might absorb shock that would otherwise be felt by the flight computers. I've also seen some minor warping in the sun, but I've got some high-temp plastic on order to fix that. Enjoy, Casey

7 years, 7 months

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

altusmetrum August 2015