highaltitude.log.20120904

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[01:16] <griffonbot> Received email: steamfire@gmail.com "Re: [UKHAS] NASA Open Source"
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[02:12] <griffonbot> Received email: =?utf-8?Q?John_Underwood?= "RE: [UKHAS] Launch Announcement - Sunday 2nd September"
[02:18] Nick change: DRAMA -> DRAMAWAY
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[05:38] <griffonbot> Received email: David Akerman "Re: [UKHAS] Launch Announcement - Sunday 2nd September"
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[08:01] Action: costyn waves
[08:03] Action: x-f seas
[08:04] Action: fsphil ducks
[08:04] Action: daveake swells
[08:05] Action: Penfold particles
[08:06] <costyn> oh you guys XD
[08:11] <costyn> Upu: I'm not getting any response from the GPS: B562624240FFFF63000010270050FA0FA06402C10000000000000016DC * Reading ACK response: (FAILED!)
[08:11] <costyn> Upu: maybe I fried it with static or my wiring is wrong?
[08:13] <gonzo_> I tested my comms initially by just looking for the ack with a scope. Before I wrote code to deal with the ack
[08:14] <costyn> gonzo_: I don't have a scope here unfortunately. there's one at my hackerspace though ; i could give that a go
[08:14] <costyn> I only need vcc/gnd and tx/rx wired up right
[08:15] <costyn> time/vbck/scl/sca needn't be connected right?
[08:15] <gonzo_> is that the ublock?
[08:15] <costyn> yes
[08:15] <costyn> on one of upu's breakouts
[08:15] <gonzo_> yep, just the 4 you mentioned
[08:15] <costyn> I have a second one here, I could try that one and see if I get a different response
[08:16] <gonzo_> I only used the nmea mode, but send a mode setting command to it periodically.
[08:17] <gonzo_> from mem, the only response I would get to a binary set command would be an ack. If it failed to hear/decode the setting pkt I would not get any comms back. So a noddy scope did that job
[08:18] <fsphil> I'd check if you where at least receiving the nmea data
[08:18] <costyn> fsphil: I don't seem to be getting any response from the gps
[08:20] <fsphil> rx and tx the right way around?
[08:22] <costyn> the labels for the serial interface are a little wonky on the pro min
[08:22] <costyn> GND != ground but BLK= ground it seems
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[08:22] <costyn> GND = CTS
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[08:23] <fsphil> odd
[08:23] <costyn> brb afk
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[08:41] <costyn> whee B562624240FFFF63000010270050FA0FA06402C10000000000000016DC * Reading ACK response: B5625120624325B (SUCCESS!)
[08:41] <costyn> it workz
[08:42] <fsphil> how how? :)
[08:42] <costyn> fsphil: by not using GND as ground, but using BLK as ground
[08:43] <UpuWork> odd
[08:43] <UpuWork> was about to say
[08:43] <costyn> apparently GND = VCC = CTS (as labellend correctly on the FTDI)
[08:43] <UpuWork> gnd = vcc ?
[08:43] <UpuWork> vss maybe
[08:43] <costyn> http://arduino.cc/en/Main/ArduinoBoardProMini
[08:44] <costyn> if I measure GND and VCC on the left hand side, get almost no voltage difference
[08:44] <costyn> 3.3v is between vcc and BLK
[08:44] <UpuWork> BLK is GND
[08:45] <costyn> the corresponding pin to GND (on the pro mini) on the FTDI is labelled CTS
[08:45] <UpuWork> well no idea at but if it works
[08:45] <costyn> UpuWork: yes, BLK is GND and now the GPS is working fine
[08:45] <costyn> still mystified why they labelled the CTS pin as GND
[08:47] <costyn> doing a little googling now
[08:50] <costyn> the GND pin on the left row is not connected to the other GND pins on the pro min
[08:50] <costyn> i
[08:50] <daveake> ???
[08:51] <daveake> On the ones I've used, there's a GND pin on each side, and they're both connected together
[08:51] <costyn> daveake: in this pic: http://arduino.cc/en/Main/ArduinoBoardProMini top and bottom row GNDs are connected
[08:51] <daveake> Or do you mean a "GND" pin on the GPS?
[08:51] <daveake> yes
[08:51] <costyn> daveake: but the GND pin on the left side is CTS not GND
[08:51] <daveake> Ah
[08:52] <daveake> Never used that
[08:52] <costyn> well i thought GND = GND, but apparently not :)
[08:52] <daveake> Well, I plug the programmer in there, but otherwise don't use it
[08:52] <costyn> BLK = GND :)
[08:53] <daveake> I have a vague recollection of buzzing out that ened to make sure I plugged the programmer in first time
[08:53] <daveake> "in correctly"
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[08:54] <costyn> anyways, problem solved
[08:54] <costyn> i'm uploading a pic to show you why I use the pins on the left hand side
[08:55] <costyn> http://imgur.com/FOIjB
[08:56] <daveake> Well I've just buzzed out 2 boards, and both have BLK and GND on that row connected to the other GND pins
[08:56] <costyn> interesting
[08:56] <daveake> I see :)
[08:56] <costyn> maybe my cheap chinese copy has some "issues"
[08:56] <daveake> One of these is a cheap chinese copy
[08:57] <UpuWork> Its the one with the GPS module on for sure
[08:58] <costyn> daveake: you're right, on my official sparkfun one GND is connected to BLK
[08:58] <costyn> and the other GND pings
[08:58] <costyn> pins
[08:58] <costyn> strange
[08:59] <costyn> oh well
[09:00] <costyn> it works now
[09:00] <daveake> good
[09:00] <daveake> Strange one
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[10:10] <griffonbot> Received email: Dave Hibberd "RE: [UKHAS] Slovakia Launch Announcement - STS-1 (Saturday 8-SEP-2012)"
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[11:27] <eroomde> costyn: hello
[11:28] <eroomde> just saw you pm'd me last night
[11:28] <eroomde> can you link the picture to me again? i don;t know to which one you're referring
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[11:32] <Laurenceb> http://insertyourmeme.com/wp-content/uploads/2012/01/04apr23-awesome-fail.jpg
[11:32] <Laurenceb> that one
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[11:35] <Randomskk> https://twitter.com/srgsrg/status/241907083858030594/photo/1/large
[11:39] <costyn> eroomde: i meant the one with mars on the left and something on the right..
[11:39] <eroomde> oh, it is La Reunion
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[11:40] <Randomskk> solid >100 people at the talk and launch
[11:41] <Randomskk> one hackspace starting a hab project and a couple of individuals, plus some new trackers, apparently
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[11:41] <eroomde> which hackpace?
[11:41] <eroomde> space*
[11:41] <Randomskk> nottinghack
[11:41] <eroomde> noisebridge did one and it was horrendous
[11:41] <Randomskk> yes
[11:41] <Randomskk> spacebridge?
[11:41] <Randomskk> I was on the mailing list for that briefly
[11:41] <Randomskk> it was amusing if nothing else
[11:42] <eroomde> steam-punk counter-culture doesn;t help you so well when you chase after a balloon and get stranded on a mountain and get hypothermia
[11:42] <Randomskk> indeed
[11:42] <eroomde> it's best confined to cities where being attached to reality is less necessary
[11:42] <eroomde> idiots
[11:42] <Randomskk> the nottinghack people seemed very sensible. they even brought laser cutters and soldering irons and tools and kits and things to emf.
[11:43] <Randomskk> well. bringing a laser cutter to a field is perhaps not entirely sensible
[11:43] <Randomskk> but still
[11:43] <eroomde> yeah the event itself looked like lots of fun
[11:44] <Randomskk> it was amazing, well worth coming if you can
[11:44] <eroomde> i will try
[11:44] <Randomskk> really fantastically done
[11:44] <eroomde> i enjoyed the bbc news bit
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[11:44] <Randomskk> the bar serving only real ales under a bridge on the M1 was cool too
[11:44] <eroomde> though I can;t help thinking that they deliberately sought out some of the twitchier attendees
[11:44] <Randomskk> probably
[11:45] <Randomskk> pro tip: before giving a talk where you include your twitter id, check that twitter isn't set to not notify on @mentions from people you don't follow
[11:45] <Randomskk> oops
[11:45] <Darkside> yeah i spoke to jacob applebaum about the noisebridge one
[11:45] <Darkside> they were trying to use a phone to do it
[11:46] <Darkside> and it did some weird thing where above 18km it would report some kind of scrambled data
[11:46] <Darkside> and they wre trying to make sense of it
[11:48] <daveake> A message from Darkside ... http://imgur.com/wUFkR
[11:49] <eroomde> wrong way up
[11:49] <daveake> gp
[11:49] <eroomde> it's ok, sometimes the phones don't store the orientation properly in the metadata
[11:49] <eroomde> you can fix it manually
[11:51] <Laurenceb> theres this thing called rotate image
[11:52] <daveake> orly?
[11:52] <Laurenceb> dunno if youve ever come across it
[11:52] <Randomskk> whoosh
[11:52] <Laurenceb> apparently its state of the art
[11:52] <daveake> sounds clever
[11:52] <fsphil> next think you'll be telling me they've combined all these photo editing tools into one package, like some kind of shop
[11:53] <Hix> i think facebook has a filter to disregard rotate image metadata.
[11:53] <Hix> photoexpress?
[11:54] <DanielRichman> http://i.imgur.com/S4E6V.jpg
[11:55] <UpuWork> haha
[11:56] <craag> http://imgur.com/wUFkR
[11:56] <daveake> nice :)
[11:56] <craag> Arggh putty..
[11:56] <fsphil> yea I compared them too craag :)
[11:56] <Penfold> hix; unlike eBay which appears to have a filter to invent its own.
[11:58] <Hix> Penfold: :D also edits text to insert random spelling and grammatical horrors
[11:58] <fsphil> lol
[11:58] <craag> fsphil: I right-click to open link at home with gnome. Doesn't do the same with putty at work :/
[11:58] <fsphil> yea my keyboard has that feature
[11:59] <Randomskk> craag: you can disable right-click-paste in putty
[11:59] <craag> Randomskk: Just found that option :)
[11:59] <Randomskk> hehe
[11:59] <Randomskk> I don't think anyone's found or noticed it until after pasting something by accident
[12:00] <UpuWork> [12:55] <craag> http://imgur
[12:00] <UpuWork> piss off mirc paste
[12:00] <UpuWork> http://i.imgur.com/CLhwq.jpg
[12:01] <Randomskk> https://randomskk.net/u/S4E6V.jpg
[12:01] <Randomskk> surely
[12:02] <UpuWork> heh
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[12:09] <Darkside> oh wait
[12:10] <Darkside> i had it upside down
[12:10] <Darkside> derp
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[12:17] <daveake> More photos (including the "corrected" "G'Day" one) in my flickr set now - http://www.flickr.com/photos/daveake/sets/72157630074184822/
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[12:46] <Laurenceb> http://www.flickr.com/photos/daveake/7915791260/in/set-72157630074184822/lightbox/
[12:47] <Laurenceb> nice
[12:47] <daveake> Yeah, DS shouted "Visual!" so I jumped out of the car and tried to get some pix
[12:48] <daveake> Scary seeing it come down with all those power lines
[12:48] <daveake> and phone lines
[12:48] <daveake> And trees
[12:48] <daveake> And houses
[12:48] <daveake> And cars
[12:48] <gonzo_> oh my!
[12:50] <daveake> This one taken by the video payload, which was at this point upside down and about to land - http://www.daveakerman.com/wp-content/uploads/2012/09/vlcsnap-2012-09-03-10h26m58s185-1024x576.png
[12:51] <daveake> That's the chute, balloon and cloud6
[12:51] <daveake> Best pic of the day - http://www.flickr.com/photos/daveake/7915652898/in/set-72157630074184822
[12:52] <daveake> People just walking past the parachute without any idea of what just happened
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[13:07] <fsphil> needs more nasa stickers and hi-viz tape
[13:08] <fsphil> a buzzer and some dry ice would add to the effect
[13:08] <fsphil> actually I wonder if it would be possible to make a cloud visible from the ground
[13:08] <fsphil> using dry ice
[13:12] <gonzo_> depends on how high you want to see it. But think you'd need a lot
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[13:13] <fsphil> too much likely
[13:14] <gonzo_> it does not boil off that quickly. So you prob woyuld not see it if the ballonn is moving
[13:15] <fsphil> yea, even on the ground it doesn't do much until introduced to water
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[13:20] <gonzo_> putting a lb of french calk in the balloon is a better bet
[13:20] <gonzo_> chalk
[13:21] <gonzo_> anddoing a low alt burst
[13:21] <daveake> space aaaart
[13:22] <fsphil> nearly :)
[13:23] <fsphil> think of it as sky graffiti
[13:23] <eroomde> in response to that email earlier suggesting a 'stirk' should be a new unit, i think we need a jargon file
[13:23] <UpuWork> lol
[13:24] <eroomde> eg
[13:24] <eroomde> ISH : international standard hab time, example usage: "I'll launch at 10am on saturday" [meaning: There is a chance I will launch at the weekend]
[13:24] <eroomde> Coxon Kilometre: The first kilometre of a flight where payloads often fail if they are going to do so. Named after James Coxon in honour of the large amount of empirical data his payloads provided to support this hypothesis (though only in the early days!). Example usage: "It's survived the Coxon kilometre, I'll put the kettle on".
[13:24] <UpuWork> http://ukhas.org.uk/ish
[13:25] <eroomde> Stirk: A unit of gas. Example usage: "It'll be reet nogged wit two stirks 't t'hydrogen 'n all, lad, eey by gum hovis flat-cap dandelion and burbock. available from my shop" (you wouldn't know I'm from the south would you?)
[13:25] <daveake> lol
[13:25] <daveake> ^^^ genuine
[13:25] <UpuWork> lol
[13:27] <fsphil> Timming -- an alternative to testing, whereby you do none
[13:27] <daveake> :D
[13:28] <eroomde> Testing - what mike bessant does to eroomde's patience
[13:29] <eroomde> hmmm
[13:29] <eroomde> i just realised who has not been around so much of ate
[13:29] <eroomde> late*
[13:29] <daveake> Pittance - Amount of media coverage to be expected if you fly anything other than a Raspberry Pi
[13:29] <UpuWork> "Eroomde" SI unit of tolerance to stupid people. Generally measured in very small amounts i.e µEroomde
[13:30] <Randomskk> surely it's generally measured in MEroomdes
[13:30] <eroomde> also a unit of arrogance
[13:30] <Randomskk> one Eroomde being a very small amount :P
[13:30] <BrainDamage> that would mean that the reference is large
[13:30] <daveake> Indeed
[13:30] <BrainDamage> the reference is small instead
[13:30] <UpuWork> i think you know what I meant :P
[13:30] <Randomskk> :P
[13:31] <daveake> "fsphil" Amount of time taken to obtain a notam if your name isn't Dave
[13:31] <eroomde> i did once read on a computer science ebsite that the unit for arrogance should be nano-dijkstras
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[13:31] <jgrahamc> UpuWork: received my HABamp. Thanks.
[13:31] <eroomde> jgrahamc: come nad play along
[13:31] <UpuWork> nps
[13:31] <eroomde> and*
[13:32] <UpuWork> we are doing new SI units jgrahamc
[13:32] <eroomde> we're doing a jargon file equivalent for hab
[13:32] <fsphil> one fsphil is roughtly 3 months
[13:32] <jgrahamc> What are we playing? Global Thermonuclear War or A Nice Game of Chess?
[13:32] <eroomde> ISH : international standard hab time, example usage: "I'll launch at 10am on saturday" [meaning: There is a chance I will launch at the weekend]
[13:32] Last message repeated 3 time(s).
[13:32] <eroomde> woah sorry
[13:32] <eroomde> middle button fail
[13:32] <eroomde> or rather, middle button worked
[13:32] <eroomde> but i was trying to scroll with it
[13:33] <Hix> gnats-cock | margin of error often resulting in catastrophic failure
[13:33] <daveake> "Josh" Unit to measure the amount of bollox in an article. a uJosh is most common in daily life
[13:33] <UpuWork> lol
[13:33] <fsphil> The daily mail is full of josh
[13:33] <Hix> ^^^ True fsphil
[13:34] <eroomde> http://pastebin.com/wBXSY2FU
[13:34] <eroomde> this is what we got before you arrived jgrahamc
[13:35] <eroomde> i just went on his damned website daveake
[13:35] <eroomde> i had forgotten all about that
[13:36] <eroomde> now i'm upset again
[13:36] <daveake> oh dear
[13:36] <daveake> Sorry :)
[13:36] <UpuWork> I feel a build up of µEroomdes
[13:36] <daveake> "Upu" Unit of aerial capability. Typical setups are in the 10-100 mUpu range
[13:37] <UpuWork> oh yes
[13:37] <eroomde> i just wish he'd learn what a pronoun is
[13:37] <daveake> Anything over 1.0 Upus risks eviction from the bedroom
[13:37] <eroomde> and prepositions too
[13:38] <eroomde> 'the amount of anticipation at...'
[13:38] <daveake> He does preposterous quite well
[13:38] <eroomde> it sullies my eyes
[13:42] <jgrahamc> The eroomde scale needs to be logarithmic.
[13:42] <jgrahamc> Like a Richter scale.
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[13:46] <eroomde> dBer
[13:46] <eroomde> a relative, logarithmic idiocy scale
[13:47] <eroomde> we just need to define an isotropic idiot
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[13:48] <eroomde> no one mention what various people are thinking of mentioning. that would be mean
[13:48] <gonzo_> a point source. Or a source of pointing?
[13:48] <gonzo_> Pointing, lasughing and staring
[13:49] <eroomde> perhaps something that is uniformly idiotic
[13:49] <eroomde> no lobes and nulls
[13:49] <eroomde> just pure null
[13:49] <daveake> LoL
[13:49] <eroomde> pleasingly, null is french for idiot
[13:51] <gonzo_> so no lobes, must have had a lobotomy
[13:51] <gonzo_> (or is that having your bottom, lob'ed?)
[13:52] <eroomde> i always thought the latter
[13:52] <eroomde> lots of things confused me when i was littler
[13:52] <eroomde> crossing continents, on radio 4, i thought was a program about angry people with bladder control problems
[13:52] <eroomde> was about 12 before i saw it written down
[13:53] <daveake> lol
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[13:54] <daveake> Sounds like something from ISIHAC
[13:54] <eroomde> yes
[13:54] <eroomde> he'd probaly just say 'crossing continents'
[13:54] <eroomde> and the audience would just laugh
[13:54] <daveake> yes :)
[13:54] <eroomde> no need to complete
[13:55] <daveake> nope
[13:55] <eroomde> 'specimen - italian astronauts'
[13:55] <eroomde> that got me good and propper
[13:57] <daveake> getting me too
[13:57] <daveake> I was telling Julie what I thought of Oscar Pistorius's complaint yesterday. I only got as far as "he hasn't a" and she filled in the joke herself
[13:58] <eroomde> :)
[13:58] <Hix> Megahertz (n) A lot of pain
[13:58] <daveake> yeah :)
[13:58] <eroomde> actually one of the commentators said 'he's on his last legs' during a 400m amputee race
[13:58] <daveake> oops
[13:59] <daveake> Otter: Nice weather in Yorkshire
[13:59] <Hix> Diode n. A pair of long poems
[14:00] <eroomde> transister - gender re-assigned nun
[14:00] <daveake> :D
[14:01] <Hix> Barium: What doctors recommend when their patients die
[14:02] <eroomde> capacitor - someone who admisiters corporal punishment to school children with his hat
[14:03] <Hix> Node: Past tense of knew
[14:04] <eroomde> Pater Familias - I've heard this routine before
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[14:09] <eroomde> soldering to the theme tune of the third man
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[14:12] <eroomde> jonathan from jonathan and charlotte is a big chap isn;t he
[14:12] <eroomde> i should get a twitter account
[14:13] <Randomskk> I thought you already had like two
[14:13] <eroomde> one
[14:13] <eroomde> which people inexplicably subscribe to
[14:13] <Randomskk> so which of eroomde and edmoore87 isn't you?
[14:13] <eroomde> i have not posted anything
[14:13] <eroomde> oh 87 is probably cam
[14:13] <eroomde> and dead
[14:14] <Randomskk> dead, unlike eroomde? :P
[14:15] <eroomde> eroomde is dormant
[14:15] <Randomskk> heh fair enough
[14:15] <number10> doesnt appear to be looking at the last 1/2 hour
[14:17] <eroomde> contribute to the jarhab file
[14:17] <eroomde> jarhab sounds like something that would put you on an fbi list
[14:17] <eroomde> different name maybe
[14:23] <eroomde> Penfold: the DB bears much repeated listening. i am having another round again today.
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[14:34] <eroomde> the conductors drinking game
[14:34] <eroomde> 2 fingers every time gergiev adjusts his hair in a fast tempo piece
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[14:36] <jgrahamc> This summer I made a water rocket from a piece of old pipe, a bic pen and a bicycle pump.
[14:36] <jgrahamc> Simple and good fun to keep kids entertained.
[14:36] <eroomde> and what about your children?
[14:37] <jgrahamc> OK. So it kept me entertained.
[14:37] <eroomde> :)
[14:37] <fsphil> water rockets are definitely fun
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[14:38] <Hix> we used to make them with a 1.5l coke bottle a rubber bung and a car footpump with the conical lilo adapter jammed into the bnug
[14:38] <Hix> *bung
[14:38] <jgrahamc> There's a great site (sciencetoymaker.org) where this teacher publishes plans for making fun stuff out of scrap. I made his "Ponyo boat" a couple of years ago. His water rocket was similarly easy.
[14:38] <Hix> great fun
[14:38] <jgrahamc> Ponyo boat: http://blog.jgc.org/2011/06/making-ponyo-or-putt-putt-boat.html
[14:39] <fsphil> it's not a ponyo boat unless it can grow large enough to hold a person :)
[14:39] <jgrahamc> My father in law tried the water rocket out and managed to bullseye my mother in law on the first shot.
[14:39] <Hix> :D
[14:40] <daveake> insufficient testing?
[14:40] <daveake> or was that the plan?
[14:40] <jgrahamc> It made him laugh, that was the main thing.
[14:40] <jgrahamc> But, oddly, a surprise Badoit bottle to the head didn't make my MIL smile.
[14:42] <number10> jgrahamc: have you seen http://scitoys.com/
[14:42] <jgrahamc> Also, using a compressor I was able to prove that a plastic water bottle is unable to survive 8 bar.
[14:42] <jgrahamc> yes, number10 been looking at that site lately.
[14:43] <jgrahamc> Want to make the Gauss rifle
[14:43] <number10> there are some fun things there - some kids got arrested for saying they were going to make the hydrogen bomb
[14:44] <Hix> you can't go posting link like thosewhen people are supposed to be at work :)
[14:44] <number10> save it for later
[14:44] <number10> he has a couple of books out roughly the same as whats on the site
[14:45] <jgrahamc> The other thing I really like is the idea of collecting sample to make your own periodic table.
[14:47] <fsphil> I was watching Cosmos last night where Sagan talked about how they measured the size of the earth using shadows of the sun, I'd love to repeat that
[14:48] <jgrahamc> Forgot who did that. One of the ancient greeks, right?
[14:48] <fsphil> looking that up now
[14:48] <fsphil> Eratosthenes
[14:48] <UpuWork> its in this excellent TEDex http://www.youtube.com/watch?v=F8UFGu2M2gM&list=FLGkq3Q2JQhN_ChjcPPwAW3A&index=1&feature=plpp_video
[14:49] <UpuWork> not yours JGC
[14:49] <jgrahamc> I'd love to repeat Foucault's 1850 measurement of the speed of light
[14:49] <UpuWork> explains how they worked the speed of light out ...
[14:49] <UpuWork> snap ?
[14:49] <fsphil> was that the one using candles and a rotating disk?
[14:49] <UpuWork> yep
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[14:49] <fsphil> yea that was cool
[14:49] <UpuWork> I like Adam Savage
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[14:51] Action: nick_ gets to writing his outreach proposal (including some school HAB flights)
[14:51] <UpuWork> OMG daveake's DOING TESTING LOLOL
[14:51] <UpuWork> private joke bear it no heed
[14:51] <Darkside> wat
[14:51] <daveake> lol
[14:52] <Darkside> oh goddamn i can not code this afternoon
[14:52] <Darkside> this is not working...
[14:52] <Darkside> im gonna go work on the balloon antenna..
[14:56] <eroomde> remember the advice i gave you
[14:57] <eroomde> if you're not going to use a parachute on your payload, you'll want to find some other way to improvestability, eg by bringing the centre of gravity forward and putting something aerodynamic on the front
[14:57] <eroomde> the best way to do this is to make the antenne out of machines solid metal bar
[14:57] <daveake> with a spike?
[14:57] <eroomde> ideally sharpened to a point on the front to improve the aerodynamics
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[15:00] <Laurenceb> id stick some explosives on the bottom to cushion the landing
[15:01] <Laurenceb> like soyuz
[15:01] <daveake> I knew I went wrong using flexible wire in a fluffy teddy bear
[15:02] <eroomde> Laurenceb: yes that's also a good idea
[15:03] <eroomde> indeed you could drop ballast just before landing
[15:03] <eroomde> to make the landing software
[15:03] <Randomskk> softer?
[15:03] <eroomde> not metal ballast (obviously! that would be dangerous- lol!)
[15:03] <nick_> Antrax is probably best for ballast.
[15:03] <eroomde> just something liquid and safe
[15:03] <eroomde> like mercury
[15:04] <eroomde> shut up everyone about to be pendantic
[15:04] <eroomde> i warn you
[15:04] <nick_> I'd really like a bathtub full of mercury
[15:04] <nick_> (I'll hold my breath)
[15:04] <eroomde> i doubt you could sumberge yourself that easily
[15:05] <nick_> That's the point
[15:07] <jgrahamc> I am now the proud owner of a parafoil.
[15:07] <jgrahamc> http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=14284
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[15:07] <eroomde> me-too board but has a few nice advnatages over the pi
[15:07] <eroomde> http://cubieboard.org/
[15:07] <eroomde> namely - an actual graphics unit you can use like a normal person
[15:07] <eroomde> which is to say, not for graphics
[15:08] <eroomde> and sata
[15:08] <Randomskk> jgrahamc: nice
[15:08] <eroomde> which means you can dump appreciable amounts of data at high rates onto a drive
[15:08] <jgrahamc> eroomde: looks cool.
[15:08] <eroomde> those two things alone are worth quite a lot to me
[15:09] <nick_> Isn't it nicer by having a new instruction set too?
[15:10] <eroomde> yes it's a newer architecture
[15:10] <eroomde> i'm less bothered by that
[15:10] <eroomde> but the neon graphics unit is a huge boon
[15:10] <eroomde> 4 vectored float operations per cycle from that
[15:10] <eroomde> = dsp heaven
[15:11] <nick_> Have you used a cortex m4 for dsp?
[15:11] <eroomde> yes but not in huge depth.
[15:12] <nick_> (I was looking into the difference between m3 and m4 the other day, and I don't understand enough about it)
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[15:12] <jgrahamc> Nice article about how cables are held down on Curiosity: http://igkt.net/sm/index.php?topic=4028 It's all about knots.
[15:12] <eroomde> i've done som basic stuff and read through arm's datasheet which is v instructive
[15:12] <Randomskk> nick_: mostly the m4 has a FPU and DSP instructions
[15:12] <eroomde> nick_: fpu
[15:13] <nick_> What kind of thing would you do with m4?
[15:13] <Penfold> ooo - cubieboard looks neat
[15:13] <eroomde> something that was a bit too big for anything smaller but not requiring something much bigger nick_
[15:13] <eroomde> that sounds obtuse
[15:14] <eroomde> but, the fpu is a huge boon
[15:14] <eroomde> it can means hundreds of times the flops of an otherwise similar(but fpu-less architecture) of the same speed
[15:15] <eroomde> which is useful for all sorts of dsp things
[15:15] <nick_> OK
[15:15] <eroomde> and control (which is dsp really anyway)
[15:15] <eroomde> it's basically about as big a chip as i'd want to go bare-metal with
[15:16] <nick_> But will you still be limited by DAC?
[15:16] Action: Laurenceb is running chibios
[15:16] <Laurenceb> on F4
[15:16] <eroomde> bigger than that and you start getting into more complicated power hungry features who archituecture is designed with operating systems in mind
[15:16] <eroomde> for example, translation lookasside buffers for memory management
[15:16] <nick_> Sorry, ADC
[15:16] <eroomde> limited in what way?
[15:17] <nick_> Speed wise
[15:17] <eroomde> well, one can buy adcs whose sample rate his higher than the clock speed of the chip
[15:17] <eroomde> so adc technology isn;t really a limiting factor
[15:17] <Laurenceb> *cough* stm32f3
[15:17] <Laurenceb> has crazy fast adc
[15:18] <eroomde> the onboard peripherals are there for convenience. they're for the 80% use case, constrained by cost
[15:18] <Laurenceb> coming out in a week or so aiui
[15:18] <eroomde> but it's no bigger to get external stuff if your requirements are more specific
[15:19] <nick_> OK, so you just use external ADCs?
[15:19] <eroomde> biggy*
[15:19] <eroomde> nick_: well it depends on what you're doing!
[15:20] <eroomde> there's no way i can give you an answer for such a general convo
[15:20] Action: nick_ is thinking about his cosmic ray detector
[15:20] <eroomde> it might be that you need one sample per second only and do a huge amount of dsp in between
[15:21] <eroomde> are you thinking of looking for the 4ns pulses directly then
[15:21] <eroomde> ?
[15:21] <nick_> Not 4ns
[15:21] <nick_> a few 100s of ns
[15:22] <eroomde> do you want to do something if you detect them or do you just want to log all the raw samples?
[15:22] <nick_> Do something when there is acutally a signal
[15:22] <nick_> Or if there's probably a signal
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[15:24] <eroomde> do you need to get an accurate shape of the wave?
[15:24] <eroomde> or is it just a threshold?
[15:25] <nick_> Maybe the shape, but definitely the amplitude
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[15:25] <eroomde> hmm
[15:25] <eroomde> so that could be quite a sample rate you need
[15:25] <nick_> So previously I looked at some fash ADCs
[15:25] <nick_> fast
[15:26] <nick_> That could buffer a few measurements
[15:26] <Randomskk> you could just do a max detect and reset or something
[15:26] <Randomskk> brb
[15:27] <eroomde> yeah, i'm just wondering about a fast adc into a circular buffer
[15:28] <eroomde> and some means of detecting something (eg threshold)
[15:28] <eroomde> which would then let you dump the previous 5uS of samples, say
[15:29] <nick_> Yeah, I was thinking that, essentially
[15:29] <nick_> Although I thought I would be limited to some small number of samples (<10)
[15:30] <nick_> Then some quick signal processing to decide whether it really was a signal pulse, and if so the amplitude
[15:30] <eroomde> no reason you need to be
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[15:30] <eroomde> what makes it a singal pulse as opposed to something else - shape?
[15:30] <nick_> If I could do that in a relatively cheap way then I think there's a number of people who'd want it
[15:31] <nick_> Noise is fast spikes, the pulse is an exponential
[15:31] <nick_> (maybe with a secondary exponential added)
[15:31] <Laurenceb> eroomde: the stm32 adc has auto threshold
[15:32] <Laurenceb> that can trigger an interrupt
[15:32] <eroomde> nick_: h'ok
[15:32] <eroomde> so
[15:32] <eroomde> the nice thing is that you might be able to test signal vs spike with a low pass filter
[15:32] <eroomde> the low pass filter will also introduce a time lag
[15:32] <fsphil> eroomde: have you got one of those cubieboards?
[15:33] <eroomde> so, by the time the low pass filter gets above a threshold (to indicate yes i am a signal) then the actual signal might have just about gone
[15:34] <eroomde> that means you could use the secondary LPF signal detection circuit to trigger the dumping of the circular buffer to non volatile memory
[15:34] <eroomde> http://www.maxim-ic.com/datasheet/index.mvp/id/2026
[15:34] <nick_> (note that cheap is relative to ~$1k)
[15:35] <Laurenceb> you could do that on stm32 using two adcs
[15:35] <Laurenceb> first does circular buffer and second has threshold
[15:35] <eroomde> fsphil: no
[15:35] <eroomde> Laurenceb: what is the speed of the adcs?
[15:36] <Laurenceb> eroomde: according the ##stm32 its never shipping
[15:36] <Laurenceb> on F1, 860ksps
[15:36] <eroomde> we're talking about 1e8 - 1e9 sps here
[15:36] <Laurenceb> on F4, 3.6 or something
[15:36] <Laurenceb> oh
[15:36] <Laurenceb> lol
[15:36] <Laurenceb> F3 is 20Msps
[15:36] <eroomde> if nick wants to actually get proper shape info about a 100ns pulse
[15:36] <Laurenceb> but still not close
[15:37] <Laurenceb> eeek
[15:37] <eroomde> note that shape, especially on the rising edges, will require v careful circuit design and layout before that's very rf
[15:37] <eroomde> because*
[15:37] <Laurenceb> indeed
[15:38] <Laurenceb> hmm i cant be bothered to read datasheets
[15:38] <Laurenceb> but i dont think its possible with stm32f3
[15:38] <nick_> The acutal shape may not be required
[15:38] <Laurenceb> unless you can live with 50ns resolution
[15:39] <nick_> Just enough shape info to get a decent amplitude resolution knowing what the shape is
[15:39] <Laurenceb> ah
[15:39] <Laurenceb> in that case doesnt low pass help you?
[15:39] <eroomde> that depends on the shape really
[15:39] <eroomde> if it's a gaussian, happy days
[15:39] <eroomde> if it's wierd and multi-model, need loads samples per pulse
[15:40] <nick_> I can't slow it down too much, because there's likely a decent rate of these signals
[15:41] <nick_> Although really I should get on with my real work, not sit around thinking about something that could be a post doc problem
[15:41] <eroomde> nick_: http://uk.farnell.com/analog-devices/ad9484bcpz-500/adc-8bit-500msps-56lfcsp/dp/1903605?Ntt=ad9484
[15:41] <eroomde> that'd probably do ya
[15:45] <Laurenceb> wait
[15:45] <Laurenceb> cant you use an op amp integrator?
[15:45] <Laurenceb> "Data Interface: Serial, SPI"
[15:45] <Laurenceb> the hell
[15:45] <Laurenceb> at 4Ghz? i dont think so
[15:45] <eroomde> farnell is often confused
[15:46] <eroomde> tend to ignore it
[15:46] <Laurenceb> yeah mouser has the best search
[15:46] <nick_> The serial port is for config
[15:47] <Laurenceb> yeah
[15:47] <Laurenceb> why not opamp integrator?
[15:47] <eroomde> adc -> fpga -> double ported ram -> raspi or whatever
[15:47] <Laurenceb> or have i misunderstood the point of all this?
[15:47] <Laurenceb> lol
[15:47] <eroomde> would be my first order rough stab at a way of doing it
[15:47] <Laurenceb> overkill much
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[15:48] <Laurenceb> so, why not opamp integrator?
[15:48] <eroomde> why an op amp integrator?
[15:48] <Laurenceb> i dont know lol
[15:49] <Laurenceb> what do you want to know?
[15:49] <eroomde> why would you use that to sample the shape of a pulse any more than you would use a toothbrush of a spandau ballet cd?
[15:49] <Laurenceb> lmao
[15:49] <eroomde> or a*
[15:49] <Laurenceb> nick_: was indicating pulse area was interesting
[15:49] <Laurenceb> integration gives you that
[15:49] <eroomde> yes true
[15:49] <nick_> It is, but shape is needed too
[15:49] <Laurenceb> hmm
[15:49] <nick_> One of the issues is that you get secondary pulses
[15:49] <Laurenceb> i see
[15:50] <nick_> So you'd like to not integrate those into your signal
[15:50] <Laurenceb> so what was the idea with the low pass about?
[15:50] <eroomde> nick_: secondary pulses from reflections due to rf or something more physical?
[15:50] <nick_> The sensor triggers itself
[15:50] <eroomde> Laurenceb: that is just as a trigger to say 'yes it's a pulse;
[15:50] <Laurenceb> ah
[15:50] <eroomde> as opposed to a noise spike
[15:50] <Laurenceb> i see
[15:51] <nick_> A breakdown in one pixel can give you a breakdown in a near pixel
[15:51] <Laurenceb> due to longer duration in a real spike?
[15:51] <eroomde> and that trigger says 'what is in the circular buffer right now is of interest'
[15:51] <eroomde> which you then dump to a flash card or whatever
[15:51] <Laurenceb> damn ill get out the F3 datasheet
[15:51] <nick_> :S
[15:51] <Laurenceb> there goes hope of getting work done
[15:51] <nick_> nonono
[15:51] <nick_> get work done
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[15:51] <nick_> Ignore this, it's mostly and idle curiosity for me atm
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[15:55] <Laurenceb> ok
[15:55] <Laurenceb> F3 can be "overclocked" to 36Msps
[15:56] <eroomde> nick_: what's the peak amplitude you're expecting?
[15:56] <nick_> ~100mV?
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[15:56] <Lunar_Lander> hello
[15:57] <eroomde> nick_: ok, could be worse
[15:57] <Laurenceb> so like 33ns resolution
[15:57] <eroomde> we can deal with that
[15:57] <Lunar_Lander> daveake, as to the capacitor discussion of yesterday: I only could get a 100 uF cap for 40 V is that OK too?
[15:57] <Laurenceb> id avoid the low pass
[15:57] <daveake> What do you think?
[15:58] <Laurenceb> then just have 36msps into a circular dma buffer
[15:58] <Hix> http://www.compositestoday.com/2012/09/apple-granted-carbon-fibre-moulding-patent/
[15:58] <Laurenceb> with analogue watchdog
[15:58] <Lunar_Lander> yeah probably not that good
[15:58] <daveake> Why not?
[15:58] <Laurenceb> to trigger a mem to mem dma and isr
[15:58] <Lunar_Lander> wait
[15:58] <Lunar_Lander> 40 V is the max. voltage
[15:58] <Laurenceb> that runs on completion to look at the pulse
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[15:58] <Laurenceb> and chuck noise
[15:59] <Lunar_Lander> I also got a 200 uF Low ESR 25 V
[15:59] <daveake> Which do you think is best for your application?
[15:59] <Lunar_Lander> Low ESR is necessary
[15:59] <Lunar_Lander> and a big capacitance
[15:59] <Lunar_Lander> so I think the second one
[16:00] <daveake> And does the 40V one have it?
[16:00] <Lunar_Lander> capacitance is smaller and it is not low ESR
[16:00] <daveake> So the choice is ...?
[16:00] <Lunar_Lander> the second one
[16:01] <daveake> Excellent. I've done all the questions and you did the answer. I call that a result :D
[16:02] <Lunar_Lander> xD
[16:03] <daveake> In some circuits, too much capacitance is a problem because the inrush current (to charge up from 0V) will be relatively high for a long time, and that possibly could stop a circuit starting up or could cause something to fail.
[16:03] <daveake> Otherwise, too much capacitance and/or voltage ratings just means it's a larger component and costs more
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[16:04] <daveake> I suspect that none of these are issues for your circuit
[16:04] <Laurenceb> s/33ns/27ns
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[16:05] <Laurenceb> of course you could also overclock the processor itself
[16:06] <Laurenceb> id suspect 15ns would be feasible from F1 results
[16:06] <Laurenceb> *STM32F1
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[16:09] <Lunar_Lander> daveake, yeah
[16:09] <Lunar_Lander> today I saw a 68 uF capacitor for 100 V
[16:09] <Lunar_Lander> that is quite a big thing!
[16:09] <nick_> Laurenceb: what architecture is STM32F1?
[16:09] <Laurenceb> M3
[16:09] <Laurenceb> i was suggesting you use the F4, which is M4
[16:10] <daveake> Size = capacitance x voltage rating x some factor
[16:10] <Laurenceb> but its not avaliable yet
[16:10] <Laurenceb> should be in a few weeks i hope
[16:10] <nick_> OK
[16:11] <Laurenceb> ST usually handle launches of new micros quite well it seems
[16:11] <nick_> Yeah, my brain remembering m4 is kinda what sparked this
[16:11] <Laurenceb> looking at the F3 clock tree you could overclock just the adc
[16:11] <Laurenceb> to get >36Msps
[16:12] <MrScienc1Man> q
[16:12] <Laurenceb> but the memory bus might be congested
[16:12] <Laurenceb> depends how the data is packed before the dma
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[16:15] <Laurenceb> and theres no ref manual yet
[16:15] <Laurenceb> grrr
[16:15] <Laurenceb> but if you can live with ~20ns between samples it may work
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[16:59] <DrLuke> mitch is awesome
[17:02] cuddykid (~acudworth@host-78-145-193-219.as13285.net) joined #highaltitude.
[17:03] <arko> hello
[17:04] <arko> anyone have recommendations for a reliable cut-down system? I was thinking about nichrome and a reciever
[17:04] <cuddykid> nichrome :)
[17:05] <cuddykid> arko: do you mean a radio receiver to trigger it?
[17:05] bertrik (~quassel@rockbox/developer/bertrik) joined #highaltitude.
[17:05] <arko> yes
[17:05] <arko> with a separate power system like a CR123 battery
[17:05] <arko> to do the cut down
[17:05] <cuddykid> hmm - I guess that's a possibility - alternatively just run some wires up to trigger
[17:06] <cuddykid> yep, sep batts are a good idea
[17:06] <arko> :) lost my first high altitude balloon 2 years ago
[17:06] <arko> about 2 minutes into flight
[17:06] <arko> dont want it to happen again
[17:06] <cuddykid> what happened? lost radio contact?
[17:07] <arko> power transistor failed because i picked the wrong one
[17:07] <arko> it was designed to draw 3 amps
[17:07] <cuddykid> ah
[17:07] <arko> transistor was 1amp
[17:07] <arko> no idea how it survived testing
[17:07] <arko> good times
[17:07] <cuddykid> lol
[17:07] <arko> now that i actually know a lot more about transistors thats not going to be a problem, haha
[17:08] <arko> if anyone in the los angeles area is interested, this project will be open for anyone to join
[17:08] <arko> http://habexproject.org
[17:08] <cuddykid> nice - if only I was in that part of the world!
[17:08] <arko> i'll put up updates and meeting
[17:08] <arko> aww
[17:08] Action: cuddykid wishes he was in california
[17:08] <cuddykid> haha
[17:09] <arko> california is nice, plenty to do
[17:09] <arko> i just wish i travelled more
[17:09] <griffonbot> Received email: David Akerman "[UKHAS] Launch Announcement - Saturday 8th September"
[17:09] <cuddykid> yeah, visited once - did quite a few places on the coast, definitely would love to live there
[17:10] <DrLuke> arko: next time put a hole in the parachute
[17:10] <DrLuke> it'll work much better ;)
[17:10] <arko> haha
[17:10] <arko> are you serious?
[17:10] <DrLuke> no I'm serious
[17:10] <daveake> As it happens I've spent most of today planning our RV trip to CA next month
[17:10] <daveake> No HABbing planned :)
[17:10] <DrLuke> because otherwise the air will just get stuck in the parachute
[17:10] <arko> to increase the rate of descent?
[17:10] <daveake> (I think I'd get dumped by the roadside)
[17:10] <DrLuke> but it has to rather flow through it
[17:11] <DrLuke> all parachutes have a hole in the top
[17:11] <cuddykid> daveake: sounds like a lot of fun
[17:11] <daveake> should be
[17:11] <cuddykid> daveake: been to CA before?
[17:11] <daveake> yep
[17:11] <DrLuke> arko: http://listverse.files.wordpress.com/2009/02/parachute.jpeg
[17:11] <daveake> long time ago
[17:11] <arko> stop by the los angeles hackerspace daveake
[17:11] <arko> DrLuke: interesting
[17:12] <arko> i've seen it in designs our company has done, but i never thought to do it on the balloon
[17:12] <daveake> hackerspace will get me dumped too
[17:12] <daveake> lol
[17:12] <arko> i bought these: http://www.rocketchutes.com/
[17:13] <arko> dumped?
[17:13] <number10> divorced
[17:13] <arko> ah
[17:13] <arko> yeah
[17:13] <arko> real quick
[17:16] <DrLuke> arko: if you bought it like that, then nevermind
[17:16] <griffonbot> Received email: Graham Shirville "Re: [UKHAS] Launch Announcement - Saturday 8th September"
[17:16] <DrLuke> it might be designed to work without holes, I thought you made it yourself
[17:16] <DrLuke> although testing it certainly can't hurt
[17:16] <arko> :)
[17:16] <arko> yeah going to do a drop test
[17:16] <arko> gonna have a friend with an rc heli do a drop test for me
[17:17] <arko> i can't fly above like 20 feet, i get disorented
[17:17] <DrLuke> well, I guess it can hurt if it falls on your head... but you get the point :P
[17:17] <arko> haha
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[17:20] <DrLuke> ah damn!
[17:20] <DrLuke> I spilled yoghurt on my new shirt!
[17:21] <arko> as long as it's not on your pants right next to your crotch. then you have to go around explaining it's yogurt
[17:21] <DrLuke> with a wink
[17:21] <DrLuke> :P
[17:21] <arko> "yogurt"
[17:23] <arko> most of the people here uk?
[17:23] <arko> noticed a lot of the good simulation tools are from you guys
[17:23] <arko> habhub, etc
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[17:25] <Randomskk> we also have this distributed listener network stuff, like dl-fldigi and the spacenear.us/tracker thing
[17:26] <arko> neato
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[17:27] <DrLuke> I'm from germany
[17:27] <DrLuke> sadly there don't appear to be many german habbers
[17:28] <arko> das ist nicht gut
[17:28] <arko> ich liebe nearspace!
[17:28] <arko> that's about the extent of my german
[17:28] <BrainDamage> I think Lunar_Lander is german
[17:29] <daveake> Yes but is he a habber?
[17:29] <daveake> one day
[17:29] <x-f> well, his radio has been used for tracking
[17:30] <DrLuke> yes :)
[17:30] <DrLuke> lunar is pretty much the only other german habber I know of
[17:30] <DrLuke> but there certainly were some other who aren't in here
[17:31] <griffonbot> Received email: Steve Aerospace "Re: [UKHAS] Launch Announcement - Saturday 8th September"
[17:31] <nick_> Isn't there another German too?
[17:31] <fsphil> several
[17:33] <Upu> afternoon
[17:33] <Upu> evening
[17:33] <Upu> whatever it is
[17:33] <fsphil> and goodnight
[17:33] <cuddykid> morning here
[17:33] <Upu> you aboard again ?
[17:33] <cuddykid> nah, still in Worcester :P
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[17:34] <fsphil> http://www.southgatearc.org/news/september2012/vk_students_reach_new_heights.htm
[17:34] <arko> it's morning here in ca
[17:37] <cuddykid> looks like we're about to have Summer at last here in the UK
[17:37] <arko> doesn't it just rain and rain?
[17:37] <arko> i miss rain :(
[17:37] <cuddykid> arko: yup, most of the time :D
[17:37] <cuddykid> noo
[17:38] <arko> it's sunny and 75 everyday here
[17:38] <arko> almost
[17:38] <cuddykid> I guess it's the complete opposite there
[17:38] <arko> yeah
[17:38] <cuddykid> nice
[17:38] <arko> i look forward to rain
[17:38] <arko> its just change
[17:38] <cuddykid> yeah, we look forward to sun here
[17:38] <arko> hah
[17:39] <fsphil> what is this... suunn?
[17:39] <Upu> If anyone wants to come to the conference I think we have 1 place left but don't quote me on that
[17:39] <fsphil> actually been quite nice today
[17:40] <cuddykid> Upu: unfortunately I won't be going to this year's one :( I'll catch it online
[17:40] <Upu> yeah I noted your lack of attendance
[17:40] <cuddykid> looks like there are going to be some good talks
[17:40] <arko> link to conference?
[17:40] <Upu> http://ukhas.org.uk/general:ukhasconference2012
[17:41] <Upu> will be streamed live
[17:41] <Upu> if you can't make it
[17:41] <Upu> just subscribe to the UKHAS mailing list will post details then
[17:41] <arko> woah
[17:41] <arko> awesome!
[17:41] <arko> didnt even know there are conferences for this
[17:42] <Upu> Only been 1 :)
[17:42] <Upu> this is the second
[17:42] <Upu> International as well this year
[17:42] <Upu> Dan-K2VOL is coming across the pond
[17:42] <Upu> Darkside has come from Oz
[17:42] <Upu> and we have some people from Slovenia as well
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[17:43] <arko> done
[17:43] <arko> nice
[17:43] <arko> this is great
[17:44] <Upu> welcome aboard :)
[17:44] <Upu> http://ukhas.org.uk <- here
[17:44] <Upu> is the answer to most of your questions
[17:44] <Upu> http://www.google.com <- answer to the rest :)
[17:45] <arko> hahaha
[17:45] <arko> yeah, im one of those people who can spend hours google and creating a stupid large list of bookmarks :)
[17:45] <arko> google is god
[17:52] <Lunar_Lander> BrainDamage, you rang?
[17:52] <BrainDamage> (19:24:24) DrLuke: sadly there don't appear to be many german habbers
[17:52] <BrainDamage> (19:25:34) BrainDamage: I think Lunar_Lander is german
[17:52] <Lunar_Lander> ah
[17:52] <Lunar_Lander> correct
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[18:42] <MrScienc1Man> /q Upu
[18:42] <Darkside> http://hackaday.com/2012/09/04/problems-powering-raspberry-pi-from-gpio-header/
[18:42] <Darkside> daveake: Upu
[18:42] <Darkside> come across this problem yet?
[18:43] <arko> im not sure if anyone posted this here: http://www.ke0md.com/2012/09/03/aprs-i-gatedigi-with-my-new-raspberry-pi/
[18:43] <arko> your link reminded me of it
[18:43] <daveake> Darkside that's bollox
[18:43] <Darkside> ok
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[18:44] <fsphil> he's basically jumpered the fuse, the long way
[18:44] <Darkside> akits nothing new
[18:44] <Darkside> arko:
[18:44] <Darkside> i've used a small via board with a kantronics KPC3+ as an igage
[18:44] <Darkside> igate*
[18:44] <arko> oh sweet, does it work well?
[18:44] <Darkside> runing an igate/digi with an external TNC is really simple, you just need a net connection
[18:44] <Darkside> however
[18:45] <Darkside> if you don't have a TNC, then it gets hard
[18:45] <Darkside> as the rpi doesn't have enough grunt to run soundmodem
[18:45] <arko> noted
[18:45] <fsphil> have you tried that?
[18:45] <Darkside> i've read reports of it anyway
[18:45] <fsphil> I got it compiled but couldn't run it due to usb issues... typically
[18:45] <Darkside> that the rpi can't run it reliably
[18:45] <Darkside> plus yeah, you need a usb sound card to get audio in anyway
[18:45] <fsphil> that was my flaw
[18:46] <MrScienc1Man> tried using those cheap usb sounds card?
[18:46] <fsphil> that's what it was
[18:46] <Darkside> some of the project horus team are looking at making a digi using some modem ICs
[18:46] <Darkside> MX621 i think
[18:46] <Darkside> and we're going to use the beaglebone, as we can make use of the UARTS
[18:47] <Darkside> we'd make a beaglebone cape, with an atmega and one of these modem ICs
[18:47] <Darkside> the atmega acts as a KISS TNC, which talks to the modem IC, and talks to the beaglebone via one of the UARTS, and the beaglebone has a lot of UARTs free...
[18:47] <Darkside> unlike the rpi which has one
[18:47] <arko> sweet, post about it
[18:47] <Darkside> this will mean NO usb devices ideally
[18:48] <Darkside> though we'll likely end up using a 3g modem on the USB port
[18:48] <Darkside> arko: we will when we do it..
[18:48] <arko> :P
[18:48] <Darkside> this is like a 3rd level project at the moment
[18:48] <craag> Darkside: Where did you see about soundmodem struggling on the Pi?
[18:48] <Darkside> we have other more urgent things to do first
[18:48] <Darkside> craag: reddit iirc
[18:48] <arko> cool cool
[18:48] <craag> Mine works with about 10% load.
[18:49] <Darkside> hmm ok
[18:49] <Darkside> it could be a usb thing
[18:49] <Darkside> i know the usb stack on the rpi isn't that good, some devices seem to blow out the load
[18:49] <fsphil> actually I'm gonna solder those fuses right now
[18:49] <Darkside> like, a usb mouse for example..
[18:49] <craag> Ah ok.
[18:50] <fsphil> that board ed linked to earlier looked quite nice -- even has an lvds port so it can connect to those lovely pixel qi screens
[18:50] <Darkside> heh
[18:50] <Darkside> everyone loves the pixel qi screens
[18:50] <fsphil> my laptop screen is very difficult to read in the car
[18:50] <Darkside> i must admit, after having used a OLPC for a while, they were nice
[18:51] <Darkside> we'd use an OLPC as a tracking computer if it had a bit more grunt
[18:51] <Darkside> maybe the new version will be better
[18:51] <fsphil> you could get an old eeepc and replace the screen
[18:51] <Darkside> mm
[18:51] <Darkside> we have OLPCs available to us :_)
[18:51] <fsphil> my eee has a faulty battery so I'm not bothering
[18:51] <Darkside> shenki: has quite a few
[18:51] <fsphil> nice
[18:52] <Darkside> he did some work for them
[18:52] <fsphil> I was tempted to get the early one but they didn't seem to sell to the uk for ages iirc
[18:52] <Darkside> yeah
[18:52] <Darkside> they are interesting to use
[18:52] <Darkside> i couldn't use the keyboard for long periods of time though
[18:53] <fsphil> tiny?
[18:53] <Darkside> yeah
[18:54] <Darkside> rubber thing
[18:54] <Darkside> very resiliant, which is the whole point
[18:54] <Darkside> but not very nice to type on
[18:54] <fsphil> ah . sounds like the old spectrum computers
[18:54] <fsphil> horrible keyboards them
[18:55] <Darkside> heh
[18:55] <Darkside> anyway, the screens are nice
[18:55] <Darkside> though i've found the matte screen on my MBP works pretty well in direct sunlight
[18:55] <LazyLeopard> Ah, but not as bad as the ones on the ZX-80...
[18:55] <Darkside> not as good as the pixel qi in black/white mode, but good
[18:56] <fsphil> my thinkpad is ok when the sun is shining on it directly, but at any other angle it's impossible to see
[18:56] <fsphil> glossy screens would be evil outdoors
[18:56] <fsphil> they're bad enough indoors :)
[18:57] <Darkside> yeah
[18:57] <Darkside> my old macbook unibody had one of those screens
[18:57] <Darkside> was horribly glary
[19:05] <Upu> evenig
[19:05] <Upu> evening
[19:05] <Lunar_Lander> hi
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[19:45] <mclane> hi radim
[19:45] <mclane> even if your launch location is some 400 km away from my location
[19:45] <mclane> I will try to track your payload
[19:45] <mclane> maybe I am lucky...
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[19:46] <mclane> the uk launches are too far away for me
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[19:47] <daveake> 800km is possible, for the higher flights
[19:47] <fsphil> I routinely decode flights 550km away
[19:48] <mclane> I know, but I do not have a super-sophisticated antenna
[19:48] <mclane> only an 8-element yagi and a Yaesu VR500
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[19:48] <fsphil> that's a big antenna :)
[19:48] <mclane> I will also try the HABAMP
[19:50] <mclane> I can use the antenna only indoors
[19:50] <mclane> far from ideal...
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[19:50] <fsphil> yes that's not ideal
[19:54] <radim_OM2AMR> mclane, hi
[19:54] <radim_OM2AMR> thank you for the support, maybe you can hear it, we'll see
[19:55] <radim_OM2AMR> mclane, you have to make trip to nature with your equipment :-)
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[20:05] <mclane> radim, I will look for a good spot if the weather is fine
[20:07] <griffonbot> @AnthonyStirk: Write up of Project Tiny http://t.co/PYNjjnTF #ukhas [http://twitter.com/AnthonyStirk/status/243077939229511680]
[20:10] <griffonbot> Received email: "Re: [UKHAS] Launch Announcement - Saturday 8th September"
[20:10] chris_99 (~chris_99@unaffiliated/chris-99/x-3062929) joined #highaltitude.
[20:14] <Lunar_Lander> Upu, you actually had been in Bulgaria?
[20:15] <Upu> me ?
[20:15] <Upu> no
[20:15] <Upu> Just linking MrScienc1Man's page
[20:15] <Lunar_Lander> ah
[20:20] <griffonbot> Received email: David Akerman "Re: [UKHAS] Launch Announcement - Saturday 8th September"
[20:20] <daveake> Need moar trackers lol
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[20:21] <MrScienc1Man> :)
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[20:24] <radim_OM2AMR> daveake, hope we are too far for any interference on 434.650 ;-)
[20:25] <daveake> I'll be on .200 I don't care :D
[20:25] <Darkside> and i'll be on wherever the hell i decide to be
[20:26] <Darkside> .1337
[20:26] <Upu> :)
[20:26] <Darkside> oh man
[20:26] <DrLuke> haha
[20:26] <radim_OM2AMR> but Steve will be on .650 :-) anyway, we are behind the radio horizon, so we will not interfere with you
[20:26] <Darkside> i jut had an idea
[20:26] <DrLuke> more like .13369
[20:26] <daveake> oh dear
[20:26] <Darkside> one of the instructions on my payload
[20:26] <Darkside> i could make it change frequency
[20:27] <Darkside> i can't see how that could go wrong
[20:27] <Darkside> >_>
[20:27] <Randomskk> haha no not at all
[20:27] <Darkside> hehe
[20:27] <daveake> I shall keep my frequency a secret then
[20:27] <Upu> Spacenear.us is going to get a battering on Saturday
[20:27] <Darkside> yeah
[20:27] <Darkside> it sure is
[20:27] <Darkside> Randomskk: i've for a new packet format too
[20:27] <Darkside> got*
[20:27] <Upu> especially as a number of them are 300 baud
[20:27] <Darkside> i'll get that sorted out soon
[20:27] <daveake> "Aussie wins race by jamming competitor"
[20:27] <Randomskk> hmm
[20:27] <Darkside> daveake: bahaha
[20:27] <Randomskk> saturday sounds like the perfect day to test the new system then
[20:27] <Randomskk> :3
[20:28] <Darkside> q 23
[20:28] <Upu> make sure you're about Randomskk :)
[20:28] <Darkside> q 23
[20:28] <Darkside> goddamnit
[20:28] <Randomskk> the calendar only has one launch for saturday
[20:28] <Randomskk> :(
[20:28] <Darkside> i'll get that fixed in a minute, once i actually decide my payloads callsign
[20:28] <daveake> Buzz isn't showing though the doc was uploaded and it is working
[20:29] <Randomskk> let me check the launch date on it
[20:29] <daveake> I sense I'm about to be told I cocked up ...
[20:30] <Randomskk> the latest buzz doc has a launch date of yesterday
[20:30] <daveake> Ah
[20:30] <daveake> Delete it
[20:31] <daveake> I want to call it CLOUD anyway
[20:31] <Randomskk> delete, or...?
[20:31] <Randomskk> okay
[20:31] <daveake> I'll do a new doc
[20:31] <radim_OM2AMR> Steve, our sts-1 is also not there
[20:31] <Randomskk> sure
[20:31] <Randomskk> STS-1 is on the calendar at least
[20:31] <radim_OM2AMR> Yes it is, thanks ;-)
[20:31] <daveake> Slight change of plan as I'm adding a camera, hence the name change
[20:31] <DrLuke> STS... where did I hear that
[20:32] <Randomskk> daveake: okay
[20:32] <daveake> Camera payload inside 200g
[20:32] <radim_OM2AMR> DrLuke :lol:
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[20:32] <daveake> About as light as i can get it without taking the camera apart
[20:32] <radim_OM2AMR> DrLuke, any similarities are not accidential :-D
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[21:03] <MrScienc1Man> q
[21:04] <Darkside> i
[21:04] <radim_OM2AMR> MrScienc1Man: nice orange box, we have orange box too :-)
[21:04] <radim_OM2AMR> like blackbox from plane :-)
[21:05] <SpeedEvil> Did you see the teardown of a black box?
[21:06] <SpeedEvil> youtube
[21:06] <Lunar_Lander> algae snack! http://s.gullipics.com/image/6/r/2/5yvn2l-jcbvmh-2z68/IMG1945.jpeg
[21:07] <SpeedEvil> https://www.youtube.com/watch?v=mQehX0rVYuY&feature=youtube_gdata_player
[21:07] <SpeedEvil> twaedown of a black box
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[21:09] <Laurenceb_> lol @ flames
[21:10] Nick change: DRAMAWAY -> DRAMA
[21:10] <MrScienc1Man> radim_OM2AMR: :)
[21:10] <MrScienc1Man> Lunar_Lander: that looks awful
[21:11] <Lunar_Lander> yeah but it tastes good :)
[21:17] <Randomskk> any mac users around?
[21:17] <Randomskk> ideally on OS X != lion
[21:17] <Laurenceb_> like the ring piezo
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[21:23] <Lunar_Lander> MrScienc1Man, xD I don't know if that joke is OK
[21:23] <Lunar_Lander> but I know that the algae are from South Korea
[21:23] <Lunar_Lander> how do I know?
[21:23] <Lunar_Lander> the manufacturer got a website
[21:23] <Lunar_Lander> xD
[21:26] <Hoppo> Randomskk I'm on OS X == lion
[21:26] <Randomskk> Hoppo: aww. I need either mountain lion or pre-lion testers :P
[21:27] <Hoppo> Sorry :(
[21:27] <Darkside> Randomskk: why not lion testers?
[21:27] <Randomskk> thanks anyway :P
[21:27] <Darkside> oh
[21:27] <Darkside> becuase you have me?
[21:27] <Randomskk> and also me
[21:27] <Randomskk> yes
[21:29] <Hoppo> Randomskk you may be able to help me though.
[21:30] <Randomskk> oh?
[21:30] <Hoppo> How do I open fldigi in HAB mode on Lion?
[21:30] <Hoppo> I downloaded the binary
[21:31] Action: LazyLeopard is on OS X 10.6
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[21:31] <Randomskk> Hoppo: haha yea so
[21:31] <Randomskk> we're discussing this right now
[21:31] <Randomskk> try copying the dl-fldigi thing to your /Applications
[21:32] <Randomskk> LazyLeopard: would you mind seeing if this .dmg of the new dl-fldigi runs for you?
[21:32] <Hoppo> Ah, looks like I missed the start of the topic! :)
[21:32] <Randomskk> Hoppo: in the development channel, that is. considering just having --hab be default for dl-fldigi
[21:32] <Randomskk> LazyLeopard: it's test software and not for full time use, but I want to check it runs on other OS X versions
[21:32] <LazyLeopard> Ok
[21:32] <Randomskk> you'd just need to load dl-fldigi and maybe see it's getting audio okay
[21:32] <Randomskk> thanks!
[21:32] <Randomskk> https://randomskk.net/u/dl-fldigi-3.21.50.dmg
[21:32] <Randomskk> don't bother with the HAB one
[21:33] <Randomskk> just the normal dl-fldigi
[21:35] <Hoppo> yeah moved it to my apps, opens and runs, just can't see a HAB option.
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[21:36] <Randomskk> Hoppo: once the main dl-fldigi is in apps, you should be able to use the HAB thing from the dmg
[21:36] <Hoppo> Ta Da!
[21:37] <Randomskk> it works?
[21:37] <Hoppo> Works a charm. Ta randomskk
[21:37] <Randomskk> hmm okay
[21:37] <Randomskk> cool
[21:38] <Hoppo> Think I'll have a go at some tracking this weekend then.
[21:38] <Randomskk> cool
[21:39] <Darkside> win 23
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[21:49] <griffonbot> Received email: Rob "[UKHAS] balloon fox hunt"
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[21:56] <Darkside> http://www.youtube.com/watch?v=Q34z5dCmC4M&feature=related
[21:57] Nick change: DRAMA -> DRAMAWAY
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[22:02] <griffonbot> Received email: Steve Aerospace "Re: [UKHAS] Launch Announcement - Saturday 8th September"
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[22:07] <griffonbot> Received email: Mark Jessop "Re: [UKHAS] Launch Announcement - Saturday 8th September"
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[00:00] --- Wed Sep 5 2012