highaltitude.log.20110521

[00:07] <m1x10> ping fsphil
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[00:42] <Lunar_Lander> good night
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[02:48] <Hibby> late night programming marathons
[02:48] <Hibby> can't beat 'em
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[03:09] <Dan-K2VOL> ooh
[03:09] <Dan-K2VOL> whatcha workin on hibby
[03:09] <Dan-K2VOL> you ARE up late
[03:09] <Hibby> beginning my acclimatisation to your timezone
[03:09] <Hibby> working on aprs station recognition for our wee aprsmap program
[03:15] <Hibby> fsphil: just saw some of your packets scroll up my screen
[03:22] <Hibby> it's coming along nicely.
[04:21] <Dan-K2VOL> cool
[04:21] <Dan-K2VOL> it sounds like it
[04:22] <Dan-K2VOL> when do you arrive over here
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[05:48] <griffonbot> @KB1LQC: @ageekmom I see u like #ARHAB! Here at #RIT we launched a balloon from campus in #ROC! http://flic.kr/s/aHsjuH5jWW [http://twitter.com/KB1LQC/status/71814558234329088]
[06:00] <griffonbot> @ageekmom: Check out these great balloon flt pix RT @KB1LQC: Here at #RIT we launched a balloon from campus in #ROC! http://flic.kr/s/aHsjuH5jWW #ARHAB [http://twitter.com/ageekmom/status/71817740318552064]
[06:01] <griffonbot> @ChrisAstro: RT @ageekmom: Check out these great balloon flt pix RT @KB1LQC: Here at #RIT we launched a balloon from campus in #ROC! http://flic.kr/s ... [http://twitter.com/ChrisAstro/status/71817785461846016]
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[06:48] <eroomde> morning all
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[06:56] <SamSilver> morning
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[08:02] <fsphil> morning all
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[09:50] <fsphil> hehe: http://habhub.org/predict/#!/uuid=f4397ec97dc51db8dac57b8a8032c1754860424e
[09:51] <jonsowman> whoa
[09:52] <fsphil> met office has a weather warning for strong winds monday
[09:52] <jonsowman> I can see why
[09:54] <fsphil> interestingly the burst altitude doesn't make a huge difference to the landing spot
[09:54] <LazyLeopard> Whooo!
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[11:15] <Laurenceb_> Randomskk: ive got reduced printf working on stm32
[11:15] <Randomskk> oho?
[11:15] <Randomskk> a custom c function or something else?
[11:15] <Laurenceb_> ill pastebin
[11:16] <Laurenceb_> http://pastebin.com/wJTKCafp
[11:17] <SpeedEvil> printf is hugely wasteful.
[11:17] <Laurenceb_> http://pastebin.com/U1kSmzh9
[11:17] <SpeedEvil> Isnt that puts?
[11:17] <SpeedEvil> ah
[11:18] <Laurenceb_> well its a reduced printf
[11:18] <Laurenceb_> similar to on avr
[11:18] <Randomskk> does it need any linking?
[11:19] <Laurenceb_> i used the same linking as with sprintf
[11:19] Action: SpeedEvil must not have woken up.
[11:19] <Randomskk> so the lanchon thing?
[11:19] <Laurenceb_> dunno if you could use the normal setup
[11:19] <Randomskk> doesn't that still leave you with massive binaries?
[11:19] <SpeedEvil> I don't see any printf related stuff at all there.
[11:19] <Laurenceb_> yes
[11:19] <Randomskk> SpeedEvil: printf itself will come from stdio.h, putchar needs stubbing out per-platform so printf can output stuff
[11:20] <SpeedEvil> yeah
[11:20] <SpeedEvil> ah
[11:21] <BrainDamage> SpeedEvil: you've been raptur-ed! that's why! ( or raptored? )
[11:22] <Laurenceb_> hmm its slightly bigger than before :/
[11:23] <SpeedEvil> Generally rolling your own using puts/itoa and friends is smaller
[11:23] <Laurenceb_> yes
[11:23] <Laurenceb_> wonder if i am actually using reduced printf
[11:23] <Laurenceb_> its much smaller on avr
[11:24] <SpeedEvil> The 8//32 bit thing hugely helps
[11:24] <Laurenceb_> my code is larger than full printf on avr
[11:24] <Laurenceb_> yeah
[11:24] <SpeedEvil> As there is lots less indirection.
[11:24] <SpeedEvil> and floating point crap is only large, not ridiculously huge, same with poitners.
[11:25] <Randomskk> what's wrong with pointers on avr?
[11:26] <SpeedEvil> They are emulated mostly.
[11:26] <SpeedEvil> And memory managment adds another layer of indirection.
[11:27] <Randomskk> memory management in what sense?
[11:29] <SpeedEvil> AVR does not have a flat memory model - any attempts to make it have a flat memory model adds indirection to anything that needs to deal with memory.
[11:29] <SpeedEvil> You need malloc/free
[11:30] <Laurenceb_> Randomskk: ever used dma with a ring buffer?
[11:30] <Randomskk> yea
[11:30] <Randomskk> this one time
[11:30] <Laurenceb_> im reading the pdf app note on it but i dont really follow
[11:30] <Laurenceb_> do you have some code?
[11:30] <Randomskk> kind of
[11:31] <Laurenceb_> ive got all the mems talking now, need a ring buffer for the gps
[11:31] <Randomskk> hmm it may have been https://github.com/adamgreig/followingrobot/blob/master/main.c#L492 but it's asm...
[11:31] <Randomskk> and I'm not actually sure if that part was a circular buffer or not
[11:31] <Laurenceb_> havent got the bmp085 fully working... its a pita
[11:31] <Randomskk> what's it doing?
[11:32] <Laurenceb_> nothing - i need a proper datasheet :P
[11:32] <Randomskk> ah
[11:32] <Randomskk> also why a ring buffer?
[11:32] <Laurenceb_> theres no decent documentation for it
[11:32] <Laurenceb_> so i can buffer the gps data
[11:32] <Laurenceb_> then read it out when i come to use it
[11:32] <Randomskk> I'd have thought a normal buffer with a thread/interrupt that fires to read it often enough that it doesn't have to loop around would work
[11:32] <Randomskk> otherwise you risk losing data anyway
[11:33] <Laurenceb_> hmm
[11:33] <Laurenceb_> the packet lenght is variable
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[11:34] <Laurenceb_> i guess if you can halt a dma and read all the data aquired so far...
[11:34] <Laurenceb_> then setup a new one
[11:34] <SpeedEvil> Randomskk: you need to deal with the whole bugger in one char then
[11:36] <NigelMoby> Morning
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[11:49] <Blackover> Bonjour!
[11:51] <Laurenceb_> uint16_t DMA_GetCurrDataCounter(DMA_Channel_TypeDef* DMAy_Channelx)
[11:51] <Laurenceb_> so i can use that to find the number of bytes in the buffer then grab straight from the buffer?
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[11:52] <Laurenceb_> the issue is if im in the middle of a burst of bytes of the usart something may be missed if the dma is reconfigured
[11:53] <Laurenceb_> *on the usart
[11:53] <Blackover> I can't rememeber one German guy, who is going to launch with internatiol universities equipments. Would you help me?
[11:57] <Blackover> Oh, found by myself
[12:18] <Laurenceb_> ok i get it
[12:18] <Laurenceb_> setup circular dma
[12:19] <Laurenceb_> then set transfer size=buffer size and let it run
[12:19] <Laurenceb_> buffer head = buffer size - bytes_remaining, and tail is implimented in the read buffer routine
[12:19] <Laurenceb_> data in buffer = head-tail, simple
[12:22] <Laurenceb_> no way to detect overwritten data, but i guess thatd be kind of hard with dma
[12:26] <Laurenceb_> actually i think if you only use half the buffer then theres a way to detect overwrite with the half transfer complete flags
[12:26] <Laurenceb_> total pita
[12:27] <SpeedEvil> you can't read current buffer position from the DMA controller?
[12:27] <Laurenceb_> no
[12:28] <Laurenceb_> only bytes remaining, which allows you to calculate it if its the bytes to transfer is the same as buffer size
[12:28] <Laurenceb_> circular mode resets bytes to transfer on complete
[12:29] <Laurenceb_> but to detect overwrite you need to have some flag inside the data rx handler
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[12:32] <Laurenceb_> the best it seems you can use is the half transfer detect
[12:33] <Upu> Ah when will they learn, suing the internet is the best way to loose any anomity : http://twitter.com/#!/search/%20is%20suing%20Twitter.%20I%20can't%20Imogen%20why
[12:34] <jonsowman> heheh
[12:37] <SpeedEvil> `http://yro.slashdot.org/comments.pl?sid=2174578&cid=36200582 lol
[12:38] <Upu> lol
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[13:09] Action: Laurenceb_ gets confused by pointers
[13:09] <Laurenceb_> (uint32_t)&(buffer->data)
[13:09] <Laurenceb_> if buffer is a pointer to a structure containing the array data, will that be the address of data?
[13:10] <SpeedEvil> that willl be a poitner to the 0th element of the array
[13:10] <Laurenceb_> yeah thats what i want
[13:10] <SpeedEvil> I think
[13:28] Nick change: shenki_ -> shenki
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[13:53] <SpeedEvil> http://www.ti.com/ww/en/analog/wireless_power_solutions/index-b.shtml?DCMP=hpa_pmp_bq51013_en&HQS=Other+BA+bq51013-bt 'worlds smallest wireless power reciever'
[13:53] <SpeedEvil> Only 2*3mm.
[13:54] <SpeedEvil> One teeny little catch...
[13:54] <SpeedEvil> The honking massive coil.
[13:55] <BrainDamage> reminds me of an amp I built like 10 years ago
[13:55] <BrainDamage> 50W, 3x3 cm
[13:55] <SpeedEvil> yeah
[13:55] <SpeedEvil> Glows white-hot in 3 seconds.
[13:55] <BrainDamage> the psu weighted 0.5 kg :p
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[14:09] <Laurenceb_> http://pastebin.com/BwWgSuyf
[14:10] <Laurenceb_> i think that should work - dont have gps module fitted yet to test
[14:11] <Laurenceb_> circular dma buffering of usart
[14:25] <Darkside> THE RAPTURE HAS COME
[14:25] <Darkside> we didn't get raptured
[14:25] <Darkside> :P
[14:28] <NigeyS> are you sure? we have not seen juxta :o
[14:29] <Darkside> hes is in a car with me
[14:29] <Darkside> we'cve been practicing foxhunting
[14:29] <NigeyS> ooo
[14:37] <Laurenceb_> raptors?
[14:41] <fsphil> ah crap, they haven't learned to open doors yet have they?
[14:57] <SAIDias> Howdy
[14:58] Nick change: SAIDias -> W0OTM
[15:00] <danielsaul> God, my internet is dying
[15:08] <Laurenceb_> no its being raptured
[15:09] <Laurenceb_> thats why we arent seeing anything, only the internets are ascending to heaven
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[16:47] <griffonbot> @mitch177: "I'm giving you the world! Now go out and earn it!!!" -Lasoirda #CUSF [http://twitter.com/mitch177/status/71980343623811072]
[16:50] <eroomde> hmm
[16:50] <eroomde> not our cusf
[16:55] <Laurenceb_> stupid titter
[16:58] <LazyLeopard> That's the trouble with trouble with hashtags... ;)
[16:59] <cuddykid> 1min to go...
[17:00] <jonsowman> irssi says 1800BST here
[17:00] <jonsowman> i see no raptors
[17:00] <cuddykid> lol
[17:01] <LazyLeopard> Maybe God runs on GMT?
[17:01] <LazyLeopard> ;)
[17:02] <LazyLeopard> God's Mean Time.
[17:02] <LazyLeopard> ...or "Master" perhaps...
[17:03] <cuddykid> haha
[17:03] <fsphil> man this whole rapture thing is over-rated
[17:03] <eroomde> jonsowman: what's up?
[17:03] <eroomde> any fun techy things?
[17:03] <fsphil> it's raining a lot
[17:03] <jonsowman> that is something he should have made clear at the time, I refuse to believe I'll be dying
[17:03] <eroomde> fsphil: I am going to dublin next week
[17:03] <eroomde> hoping for some rain
[17:03] <jonsowman> eroomde: Adam and I have been thinking about a successor to badgercub using this http://www.analog.com/en/rfif-components/rfif-transceivers/adf7012/products/product.html
[17:04] <fsphil> hoping for rain? lol
[17:04] <eroomde> ah yes adam mentioned it
[17:04] <eroomde> looks sexy
[17:04] <eroomde> fsphil: yep
[17:04] <eroomde> cambridge has been dry for ages
[17:04] <fsphil> listening to radio 1 earlier, "this is the start of the summer folk" .. and it pouring down outside
[17:05] <eroomde> sounds about right
[17:05] <jonsowman> also will continue looking at those avr+uhf ICs
[17:05] <jonsowman> managed to hunt down a distributor who can get them for us
[17:05] <fsphil> never been to dublin but I've heard it's nice
[17:05] <eroomde> i hope so
[17:06] <eroomde> president obama is at trinity college on the day we are arriving at trinity college
[17:06] <eroomde> hence all sorts of awkward instructions on how to check in
[17:06] <fsphil> obama's coming to see you? :)
[17:06] <eroomde> yup
[17:06] <LazyLeopard> All the reporters are in London, and went to the seaside down in the south east today... 'course they think it's summer already. ;)
[17:07] <fsphil> haha
[17:07] <eroomde> it's been v nice in cambridge today
[17:07] <SpeedEvil> eroomde: Planning a launch that day?
[17:07] <eroomde> a million punts on the cam
[17:07] <fsphil> I may be launching on saturday
[17:07] <jonsowman> oh has it? I wouldn't know as I've been inside all day ¬.¬
[17:07] <fsphil> if the predictions stay as lovely as they are now (doubtful)
[17:07] <eroomde> sucks to be you
[17:07] <jonsowman> mm doesn't it
[17:08] <SpeedEvil> I have been up for maybe 5 minutes all day - in ed sleeping type of day. :////
[17:08] <eroomde> jonsowman: we should use dominoEX instead of irc
[17:08] <jonsowman> haha
[17:08] <fsphil> lol
[17:08] Action: SpeedEvil burbles musically.
[17:08] <fsphil> dominoex is weird
[17:08] <eroomde> sounds cool tho
[17:08] <fsphil> does that
[17:08] <eroomde> fergus and i used to talk via dominoex
[17:08] <jonsowman> all mfsk modes sound great
[17:08] <SpeedEvil> We could communicate using a mode with four tones at once.
[17:09] <fsphil> I'm a big fan of FSK hell now
[17:09] <SpeedEvil> We could call it 4chan
[17:09] <jonsowman> oh god
[17:09] <fsphil> 4chan meets amateur radio. The Horror
[17:09] <eroomde> 'see pictures of nude amateurs'
[17:09] <jonsowman> D:
[17:09] <eroomde> you'd be in for a surprise
[17:09] <fsphil> have you seen sstv? it's almost that bad already lol
[17:09] <SpeedEvil> Is anyone familiar with Jaycee electronics?
[17:10] <SpeedEvil> I just had a vision of the proprietor, naked.
[17:10] <SpeedEvil> He's perhaps 30 stone.
[17:10] <jonsowman> I dislike this conversation
[17:10] <SpeedEvil> (Ham store, 3 miles away from me)
[17:10] <fsphil> Bunny Wabbits!
[17:10] <jonsowman> thanks fsphil
[17:11] <fsphil> so anyway, there might be a launch on saturday. NigeyS's sending a morse beacon to fly on it too
[17:12] <SpeedEvil> On a related matter - what ~1990 - 1995 or so PC game is the 4chan theme music sampling?
[17:14] <fsphil> spotted this on sparkfun today: http://leaflabs.com/devices/maple/
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[17:15] <SpeedEvil> Saw that too
[17:15] <fsphil> might be a really easy way to get started with arm hardware
[17:15] <SpeedEvil> Someone /.'d it
[17:15] <eroomde> ah /.
[17:16] <eroomde> like an old auntie
[17:17] <fsphil> hehe
[17:17] <Laurenceb_> SpeedEvil: i dont want to go to 4chan and listen to the music thanks
[17:17] <fsphil> a lot of 90's style game music is quite modern, chiptunes seem to be fairly popular
[17:18] <SpeedEvil> yeah - I know - it sounds _very_ familiar though.
[17:19] <natrium42> hai guise
[17:19] <natrium42> did u get raptured?
[17:20] <eroomde> the wind has picked up a bit
[17:21] <fsphil> I got wet, does that count?
[17:21] <natrium42> mmm
[17:21] <fsphil> still raining
[17:21] <eroomde> not it ireland
[17:21] <fsphil> lol
[17:21] <fsphil> have to say it's been a really dry year on average
[17:22] <fsphil> don't think it rained in april once
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[18:48] <Laurenceb_> is there a code editor for *nix with a tree view of files and nice syntax highlighting?
[18:49] <Laurenceb_> atm im using gedit but its a bit limited
[18:51] <staylo> There's Eclipse (watch the bloat though)
[18:52] <Laurenceb_> heh i should have added other than eclipse
[18:55] <staylo> Pass :)
[18:57] <Laurenceb_> heh
[18:57] <Laurenceb_> hmm dactyl is starting to come together
[18:57] <Laurenceb_> i have gps -> dma buffer -> timer isr using polled i2c to read all the sensors now
[18:58] <Laurenceb_> my plan is plug in the openpilot ekf code next
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[18:59] <Laurenceb_> openpilot have AES128 over the si4432 O_o
[19:00] <SpeedEvil> That's maybe a leetle extreme.
[19:00] <SpeedEvil> Diffle-Heimen key-setup, or PSK?
[19:00] <Laurenceb_> codes not released yet
[19:01] <Laurenceb_> http://wiki.openpilot.org/display/Doc/OpenPilot+PipXtreme
[19:01] <Laurenceb_> perfect for my groundstation tho
[19:02] <SpeedEvil> AES has problems.
[19:03] <SpeedEvil> It means that you get error propgation, and cannot recover errored data.
[19:03] <Laurenceb_> whoever thought of using it on a uav has problems :P
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[19:03] <SpeedEvil> Authentication isn't completely barking.
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[19:10] <Randomskk> xbee modules can all do psk aes transparently
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[20:43] <natrium42> Laurenceb_: you got jean claude naudin'd
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[21:08] <Lunar_Lander> hello
[21:13] <natrium42> guten abend, Lunar_Lander
[21:13] <natrium42> was geht ab?
[21:13] <Lunar_Lander> alles gut, danke!
[21:13] <Lunar_Lander> und bei dir?
[21:15] <natrium42> ich bin krank :(
[21:17] <Laurenceb_> jean claude naudin'd?
[21:17] <NigeyS> lol
[21:17] <Laurenceb_> overunitied?
[21:17] <Laurenceb_> foo./=1.0;
[21:17] <Lunar_Lander> oh warum natrium42?
[21:18] <NigeyS> Wie sind sie heute abend lunar?
[21:18] <Lunar_Lander> gut, danke NigeyS
[21:18] <Lunar_Lander> und sie?
[21:18] <NigeyS> Ich bin gut
[21:18] <Lunar_Lander> yay
[21:19] <NigeyS> :D
[21:20] <Lunar_Lander> today I read the amazing story of David Hahn
[21:20] <Lunar_Lander> the Boy Scout who made a nuclear reactor in his back yard
[21:20] <NigeyS> Lunar_Lander
[21:20] <NigeyS> Ich liebe kleine schafe
[21:20] <Lunar_Lander> lol
[21:20] <Lunar_Lander> Shaun the sheep?
[21:20] <NigeyS> ;)
[21:20] <NigeyS> haha yush!
[21:20] <natrium42> warum liebst du die?
[21:21] <natrium42> deine mutter war ein schaf
[21:21] <NigeyS> er.. yes.. 2 please....lol
[21:22] <Lunar_Lander> well
[21:22] <Lunar_Lander> do you know David Hahn?
[21:23] <NigeyS> no..
[21:24] <Lunar_Lander> he tried to make a nuclear reactor
[21:24] <NigeyS> not a wise move
[21:24] <NigeyS> you get arrested for that kinda stuff nowadays
[21:24] <Lunar_Lander> yeah
[21:25] <Lunar_Lander> he actually got jailed for 90 days this year
[21:25] <NigeyS> oops
[21:25] <Lunar_Lander> cause he stole smoke alarms to get the Americium in them
[21:25] <NigeyS> lol
[21:25] <Lunar_Lander> he actually bought 100 smoke alarms 1 dollar a piece
[21:26] <Lunar_Lander> the company sold them because they were broken
[21:26] <Lunar_Lander> and he bought $1,000 worth of Li Batteries
[21:26] <Lunar_Lander> and other stuff
[21:31] <Lunar_Lander> yeah
[21:31] <NigeyS> crazy guy
[21:36] <natrium42> yeah, i heard that story
[21:36] <natrium42> it's a win
[21:36] <Lunar_Lander> yea
[21:37] <Lunar_Lander> do you know the NIST?
[21:38] <Lunar_Lander> when I ordered a bunch of papers on gas chemistry there, i was asked if I knew that guy
[21:38] <natrium42> lol
[21:39] <Lunar_Lander> XD
[21:39] <Lunar_Lander> yeah I read that his principal took some Valentine's balloons his gf sent him
[21:40] <Lunar_Lander> cause he thought that she had inflated them with toxic gases that he might need for experiments
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[21:57] <natrium42> BREAKING NEWS: The Grimsvötn volcano in southeastern Iceland has begun erupting, officials say.
[21:57] <natrium42> also, 3 mins to rapture
[21:57] <natrium42> coincidence? i think not.
[21:58] <Lunar_Lander> rapture?
[21:58] <natrium42> the world is going to end
[21:58] <Lunar_Lander> oh that
[21:59] <natrium42> 1 minute
[21:59] <natrium42> good bye, Lunar_Lander, it was nice getting to know you
[22:00] <Lunar_Lander> ROFL
[22:03] <Lunar_Lander> 2 past 0
[22:04] <Lunar_Lander> natrium42
[22:05] <Lunar_Lander> we need dust counters for balloons
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[22:30] <SpeedEvil> Lunar_Lander: Oh - I thought that was a rapture-related comment, not an Iceland one.
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[22:31] <Lunar_Lander> np :)
[22:31] Action: SpeedEvil hits up the predictor for an iceland launch.
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[22:32] <Lunar_Lander> I'm watching "Germany's best class"
[22:32] <Lunar_Lander> "Simon, what's the equator?"
[22:32] <Lunar_Lander> "That is a certain latitude, 0 degrees, no I don't think it is 0 degrees but it is a horizontal line that runs around the world."
[22:33] <SpeedEvil> _stupidly_ low wind over iceland
[22:33] <SpeedEvil> http://habhub.org/predict/#!/uuid=b3a252d3cad8cc5d803cea43f3aad6a97b135761
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[22:35] <Lunar_Lander> xD but from Reykjavik it lands in the sea
[22:37] <Lunar_Lander> http://habhub.org/predict/#!/uuid=d75724fd10cebb94988e88b821a0add1dc7eb86d
[22:38] <SpeedEvil> A backwards preductor would be cool.
[22:38] <SpeedEvil> 'I want to launch at 9AM on wednesday with this config.
[22:38] <SpeedEvil> Where do I need to go to drop it on ipswitch.
[22:38] <SpeedEvil> s/ipswitch/slough/
[22:38] <Lunar_Lander> yea
[22:39] <Lunar_Lander> is NigeyS still here?
[22:39] <SpeedEvil> (http://www-cdr.stanford.edu/intuition/Slough.html)
[22:40] <Lunar_Lander> nice song
[22:41] <The-Compiler> Holy crap, notebook was at 93 degrees for some minutes while compiling blender. Doesn't really seem exactly healthy D:
[22:41] <Lunar_Lander> F or C?
[22:42] <SpeedEvil> Song?
[22:42] <Lunar_Lander> or poem
[22:42] <SpeedEvil> Ah
[22:42] <The-Compiler> celsius
[22:43] <SpeedEvil> Laptop procs are typically rated at much higher maximum temperatures than desktop
[22:44] <The-Compiler> sure, but 93 celsius is rather hot, I wonder why the CPU didn't clock down (can you say that like this in English? :o)
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[23:01] <Lunar_Lander> yea
[23:01] <Lunar_Lander> clocking down
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[23:14] Nick change: Danielrichman -> DanielRichman
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[00:00] --- Sun May 22 2011