highaltitude.log.20090906

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[07:49] <rjharrison_home> Morning ed
[07:49] <rjharrison_home> Early to size sir ( edmoore )
[07:49] <rjharrison_home> rize :)
[07:50] <edmoore> on a bus replacement service going to london
[07:50] <edmoore> no leg room whatsoever
[07:50] <rjharrison_home> You pinged yesterday sir
[07:50] <edmoore> been up since 6, grumble
[07:50] <edmoore> was just going to prod you that we have some piccies of badger2 up
[07:51] <rjharrison_home> Me too I have been doing DIY all w/e
[07:51] <edmoore> although it's more populated since those photos were taken
[07:51] <rjharrison_home> Cool on the svn or flickr
[07:51] <edmoore> flickr
[07:51] <rjharrison_home> I'll jump over and have a butchers
[07:51] <rjharrison_home> I'm going to go with the skillet reflow rather than a taster
[07:51] <rjharrison_home> Thought I may come back to the taster
[07:52] <rjharrison_home> toaster
[07:52] <edmoore> i remember we tried skillet about 2.5 years ago, although we did a bad job of controllng the temp and ended up with a fairly brown and slightly warped pcb
[07:53] <edmoore> http://www.flickr.com/cuspaceflight
[07:55] <rjharrison_home> Wow that looks great
[07:56] <rjharrison_home> Icarus is not going to be anything like that complex
[07:56] <rjharrison_home> I have used scre terminals for the payload cutdown and power connectors atm
[07:56] <rjharrison_home> screw
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[07:56] <rjharrison_home> How come there are 3 antenae connectors on ther
[07:56] <rjharrison_home> e
[07:57] <rjharrison_home> GPS = 1 Radio = 2
[07:59] <rjharrison_home> edmoore did you toast badger2
[08:00] <edmoore> brb need to change here
[08:00] <rjharrison_home> np
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[08:05] <edmoore_> sorry back
[08:05] <edmoore_> rjharrison_home: 2 x GPS (one hardware and one software) on the right
[08:05] <edmoore_> and radio on the left
[08:06] <edmoore_> and split ground planes, among other things, to try and keeping the radio from trampling over the GPS :)
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[08:11] <rjharrison_home> edmoore It looks very impressive I must say
[08:11] <edmoore> it has a fair number of issues and things on the list for rev 2, which will be sent off soon
[08:11] <edmoore> just as soon as we get everything wporking on rev1 we'll be ready to change it for rev2, which will fly on the rocket
[08:12] <edmoore> oh btw, what you can't see is on the back there is a gumstix overo
[08:12] <rjharrison_home> I have jst spent the last 4 hours debugging a problem I put into the code a month ago and didn't notice
[08:12] <edmoore> that does the software gps
[08:12] <rjharrison_home> A gumstix ovro you made or one you brought?
[08:12] <rjharrison_home> Eg is it a daughter board
[08:14] <edmoore> it's the actual gumstix itself, and it plugs directly into badger2
[08:14] <edmoore> so badger2 is the motherboard, i guess
[08:14] <rjharrison_home> Yep cool, Whay did you do that
[08:15] <edmoore> to run the soft gps
[08:15] <rjharrison_home> Do you want linux in the air?
[08:15] <rjharrison_home> Is that going to do some ESA processing
[08:15] <rjharrison_home> I guess that is why you are doing spi to spi
[08:15] <edmoore> don't need it for balloon flights, but badger2 is also the rocket flight computer (that's why it's longish and thinnish in aspect ratio)
[08:15] <edmoore> no
[08:15] <edmoore> no ESA, and SPI was something different
[08:16] <edmoore> arm to a tricky accelerometer
[08:16] <rjharrison_home> ahh Well I know a little more about spi since i interfaced the uSD Card
[08:17] <edmoore> it was actually a solder bridge underneath the AD16204 which was being a real shit to track down, and then basically would not be removed by hot air
[08:17] <edmoore> ended up reflowing the entire board
[08:19] <rjharrison_home> Wow now that sounds like a total bastard
[08:19] <rjharrison_home> Did you scope that down somehow
[08:20] <rjharrison_home> You need an xray thingy-me-jig
[08:20] <rjharrison_home> Off anywhere nice edmoore
[08:21] <edmoore> the x-ray on this occassion didn't help, annoyingly
[08:21] <edmoore> used 'binary search' - cutting the tracks in half and see if the short is on one side or the other
[08:22] <edmoore> repeat etc until you isolate the problem
[08:22] <rjharrison_home> Can you do that using a continuity meter?
[08:23] <edmoore> there's another cool project going on, and this is a meeting in london about it
[08:23] <edmoore> yes
[08:23] <rjharrison_home> HAB based or just general stuff
[08:24] <edmoore> Space Based :)
[08:24] <edmoore> It's an AMSAT project
[08:24] <rjharrison_home> Ooh nice
[08:24] <rjharrison_home> Oh yep the amature radio guys
[08:25] <rjharrison_home> They get other spacy people to kick stuff out the cargo bay doors
[08:25] <edmoore> more or less
[08:25] <rjharrison_home> Obv having made something to kick out the doors
[08:26] <edmoore> seems like you build a thing and then wait a year or two for some spare mass on a commercial launch
[08:26] <rjharrison_home> That I guess is the fun and tricky bit
[08:26] <edmoore> more or less have to take whatever orbit the main customer is paying for
[08:27] <rjharrison_home> Sounds fun unfortunalty I have DIY to do instead :(
[08:28] <rjharrison_home> Humm atol("120332") seems to be giving me hassel
[08:28] <edmoore> too big for an int?
[08:29] <edmoore> i *think* ints in avrs are 16 bit which is max 65536 unsigned
[08:29] <edmoore> but i could be totally wrong
[08:32] <edmoore> right am in kings cross
[08:32] <edmoore> ttyl
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[10:38] <grummund> yes, for the 8-bit avr's, gcc impliments 16-bit ints
[10:39] <grummund> but it's preferable, imo, to #include <sdtint.h> and use uint8_t, uint16_t, etc.
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[10:41] <Hiena> ' morning!
[10:41] <Hiena> Anybody tried to log information to an SD card with AVR processor?
[10:42] <Hiena> Is there any catch? I means speed limit, filesize limit or whatever?
[10:43] <Hiena> I had to log three 115k serial port, and the project deadline is kind of tight.
[10:44] <grummund> Hiena: you could also try #avr and/or #arduino
[10:50] <Hiena> Yup, but i hoped i'll get some airworthy answer, due it will be a flight logger. ;)
[10:51] <Hiena> Btw, did you see that?
[10:52] <Hiena> http://www.youtube.com/watch?v=-b7siH1Ausc
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[11:45] <SpeedEvil> Hiena: rjharrison_home has I think - and DanielRichan has some cod I think too
[11:46] <Hiena> Yeah, it's requires a quite simple code around 60 lines in C. My fear is only the speed limitations.
[11:53] <SpeedEvil> there are also some SD writing libs
[11:53] <SpeedEvil> I suppose another concern is latency
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[12:08] <Hiena> Yup. I saw several codes on the AVRFreaks, some of these mention 2K transfer rate, but never mention the CPU clock speed.
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[13:13] <chrisfoote> Yippee! Done my chat about HABs at http://barcampbrighton.org - seemed to go well. Looks like there is quite a bit of interest. May well be a few more new names near soon SpikeUK
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[13:29] <SpeedEvil> :)
[13:29] <SpikeUK> ping edmoore
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[14:41] <rjharrison_home> Afternnon all
[14:42] <SpikeUK> rjharrison_home Hi!
[14:43] <SpikeUK> In sunny Brighton for BarCampBrighton
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[17:21] <Laurenceb> sup
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[20:39] <rjharrison_home> Hey DanielRichman
[20:40] <rjharrison_home> Did you have a nice holiday
[20:57] <DanielRichman> rjharrison_home, yes thank you
[20:57] <DanielRichman> how are you?
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[22:26] <Laurenceb> sup
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[23:46] <kc0wys> Hello
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[00:00] --- Mon Sep 7 2009