highaltitude.log.20130501

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[02:42] <heathkid> speaking of the HX1... can I ask a stupid question without having to spend a lot of time googling it and such? (worked 16 hours today and I'm pretty tired...)
[02:42] <heathkid> for the 144.390... what's the difference between the -3 and the -10?
[02:42] <Darkside> deviation
[02:43] <heathkid> ?
[02:43] <Darkside> if you input 3.3V TTL PWM into the -3 model, the deviation should be about right
[02:43] <heathkid> ok
[02:43] <heathkid> what about the -10?
[02:44] <Darkside> you'll need a lower input level
[02:44] <Darkside> to get the correct deviation
[02:44] <heathkid> 1.8V?
[02:44] <Darkside> dunno
[02:44] <heathkid> hmm
[02:44] <Darkside> all i know is 3.3v TTL into the -3 version works
[02:45] <heathkid> that helps... at least sends me in the right direction... :)
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[04:46] <nigelvh> Heathkid, you still around?
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[05:28] <jarod> http://www.youtube.com/watch?v=icfVsql38oc jesus :/
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[06:45] <x-f> morning
[06:46] <arko> mornin
[06:47] <x-f> could somebody update spacenearus with the SP9UOB's flight info for today?
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[06:59] <eroomde_> morning
[06:59] <Darkside> morning
[06:59] Nick change: eroomde_ -> eroomde
[07:01] <arko> morning
[07:01] <arko> crazy day
[07:01] <eroomde> oh?
[07:01] <arko> design an eeg in eagle in 5 hours
[07:01] <arko> svn://svn.032.la:6699/032/EEG/EEG.zip
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[07:03] <eroomde> that's like talking to me in old english
[07:03] <arko> ?
[07:05] <eroomde> svn
[07:05] <arko> oh yeah
[07:05] <arko> git
[07:05] <arko> forgot about that
[07:05] <arko> our hackerspace repo is svn
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[07:06] <arko> i think someone got into a rant about how much they hate stallman one day.. so thus the repo was made svn
[07:06] <eroomde> ooook...
[07:06] <arko> vOv i dunno
[07:06] <arko> i wasnt there
[07:08] <eroomde> we do occassionally sing 'join us now and share the software...' to our colleague who is the one person in the company who uses windows
[07:08] <eroomde> and doesn;t really trust linux
[07:08] <eroomde> he loves it, you can imagine
[07:08] <arko> lol
[07:09] <arko> i find an odd joy in trolling any os user
[07:09] <arko> linux people are the easiest
[07:09] <arko> it goes from OS to religon to politics in 5 seconds
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[07:14] <arko> i should go home and sleep
[07:15] <eroomde> never
[07:15] <arko> spent too much on that eeg
[07:15] <arko> at least i finished my pico board
[07:17] <arko> i need to send those boards out tomorrow
[07:17] <arko> and buy a saranel active antenna
[07:17] <arko> blah
[07:20] <eroomde> i am excited about getting my boards back
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[07:23] <SP9UOB_Tom> morning all
[07:24] <eroomde> morning SP9UOB_Tom
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[07:27] <SP9UOB_Tom> fast breakfast and to the launch site
[07:27] <SP9UOB_Tom> :-)
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[07:34] <costyn> SP9UOB_Tom: good luck!
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[08:17] <SP9UOB_Tom> RocketBoy: can You clear the map ?
[08:18] <RocketBoy> na - sorry haven't got access
[08:18] <SP9UOB_Tom> ok, im going to the launch site
[08:18] <SP9UOB_Tom> CU
[08:18] <RocketBoy> ok
[08:18] <costyn> jonsowman, Randomskk, can one of you clear the map?
[08:20] <RocketBoy> expect they are all busy with exams & stuff
[08:20] <number10> looks like its clear now
[08:20] <arko> eroomde should be awesome
[08:22] <arko> Good luck tom
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[08:23] <RocketBoy> having has really caught on in poland
[08:23] <costyn> yea especially listening to HABs
[08:23] <RocketBoy> map has lots of stations in UK and poland atm
[08:23] <costyn> unbelievable amount of stations
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[08:56] <mclane_> sp9uob is up
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[08:56] <mclane_> good luck Tom
[08:59] <daveake> Nice slow ascent rate :)
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[09:02] <SQ9DIQ> nice signal +40dB
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[09:25] <fsphil> man that's slow
[09:26] <eroomde> like my net connection
[09:27] <eroomde> deliberate floater or alt record attempt or something else?
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[09:30] <x-f> SP9UOB_Tom wrote "100g kaysam / Helium - just for hardware check"
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[09:31] <x-f> then later on 4th May altitude attempts with 1600g Hwoyee / Hydrogen
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[10:21] <craag> Erm sp9uob lost?
[10:22] <daveake> Oh, hadn't noticed. Yes looks dead.
[10:24] <daveake> logtail showing some strings being uploaded but not passing
[10:24] <SQ9DIQ> I hear it S7-9, but I can not properly decode
[10:25] <SQ9DIQ> last one "$$$$$SP9UOB,420,10:24:52,024.08795,01929.23710&654,74(88$6,45,0,1b*95A"
[10:25] <craag> Ouch, looks like a timing failure as the errors are consistent across listeners.
[10:25] <craag> CPU timing.
[10:27] <daveake> Oh well spotted
[10:30] <fsphil> aww
[10:31] <fsphil> any of the strings nearly complete?
[10:32] <daveake> '$$QP9UOB,41,10:223x,5024.00741,01926.8mP19,646t,64,87,7,1t5,0,1b*F2$F\n'
[10:32] <daveake> closest I spotted
[10:34] <OM1ATS> I have this problem with decoding too
[10:34] <eroomde> this is dlfldigi bloody madness
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[10:34] <eroomde> how hard can it be to extract a clock from detecting the bit transition intervals
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[10:34] <eroomde> there's more than enough information
[10:35] <OM1ATS> now is silent ?
[10:35] <SQ9DIQ> I've heard all from 109 to about 325 currently is about 450
[10:35] <mattbrejza> you could try my super beta decoder http://users.ecs.soton.ac.uk/mfb2g09/decoder/
[10:36] <mattbrejza> (the .jar)
[10:36] <mattbrejza> or just send me a short recording
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[10:38] <SQ9DIQ> i think is still resseting , because sending 3 -4 packets and not transmiting
[10:39] <SQ9DIQ> now is, silent
[10:39] Action: eroomde holds his hat against his chest
[10:40] <OM1ATS> too long :(
[10:41] <Wujek_> I po zabawie
[10:41] <eroomde> well if it's cold that's got them they usually warm up later anyway
[10:41] <mattbrejza> seems odd taht the micro would reset due to cold
[10:42] <eroomde> provided it's moderately well insulated then the combination of increasing temps above the tropopause and reducing air pressure means the electronics usually gets a bit warmer
[10:42] <eroomde> unless it's surrounded by some very cold substance
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[10:45] <eroomde> mattbrejza: in the past have had things get into lock conditions from say an insecure nmea parser
[10:45] <eroomde> and the watchdog has got them eventually
[10:45] <mattbrejza> yea good point
[10:45] <Zygfryd> Wujek: ciekawe gdzie spadnie tym razem
[10:46] <eroomde> we need a polish translation option for zeusbot
[10:46] <Babs> Looks like another bad dlfldigi decode from Zygfryd
[10:47] <Babs> I think 11:41 was something to do with the teletubbies
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[10:49] <mattbrejza> globaltuners isnt working well for me :(
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[10:49] <mattbrejza> o well
[10:50] <homewld> google translate says :-Interestingly which falls this time
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[10:56] <cuddykid> hi WillDuckworth
[10:56] <WillDuckworth> hi cuddykid
[10:56] <WillDuckworth> any launches soon?
[10:56] <cuddykid> WillDuckworth: predictions look very good this bank hold weekend - do you have anything ready to fly?
[10:56] <cuddykid> WillDuckworth: planning a couple for mid-June
[10:56] <WillDuckworth> nothing I'd like to rely on - thanks though
[10:57] <cuddykid> got the ssdv code working :)
[10:57] <cuddykid> want a copy of the code?
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[11:11] <mattbrejza> anyone gonna own up to this one? http://www.bbc.co.uk/news/uk-scotland-glasgow-west-22365368 :P
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[11:18] <costyn> mattbrejza: I think airline pilots have seen their share of HABs; I would imagine they should've been able to identify it
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[11:29] <Brace> mattbrejza: I thought the same thing when I read that, but assumed all the folk on here would play by the rules
[11:30] <mattbrejza> yea i wasnt expecting anything, also glasgow (or scotland in general) isnt known for its launches
[11:32] <SP9UOB_Tom> well im think its lost
[11:32] <craag> SP9UOB_Tom: No signal at all now?
[11:33] <SP9UOB_Tom> itw woke up several times and dies
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[11:33] <SP9UOB_Tom> im think 1.8V design needs rethink
[11:33] <mattbrejza> what reg?
[11:34] <SP9UOB_Tom> mcp1640
[11:34] <x-f> :/
[11:34] <mattbrejza> tps62100 seems to have a lead on reliability then
[11:35] <SP9UOB_Tom> if it doesnt woke up in 30 mins i'll try to launch another one
[11:36] <mattbrejza> send it in to rescue the other
[11:36] <x-f> paint the payload box black this time :)
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[11:37] <costyn> mattbrejza: lol
[11:38] <SQ9DIQ> SP9UOB_Tom: today?
[11:38] <x-f> mattbrejza, how can i launch your .jar file?
[11:38] <mattbrejza> it should just run
[11:38] <mattbrejza> but i think it only likes the latest version of java
[11:38] <SP9UOB_Tom> SQ9DIQ: right
[11:39] <mattbrejza> because i dont have an earlier version installed to compile it for 6 (kinda running low on space)
[11:39] <SQ9DIQ> SP9UOB_Tom: the same freq ?
[11:40] <SP9UOB_Tom> yes
[11:40] <SP9UOB_Tom> just to confirm hardware failure
[11:41] <x-f> mattbrejza, thanks, looks like i need to update
[11:41] <mattbrejza> i should really compile it for java 6
[11:41] <mattbrejza> equally i should really make it a bit more finished :P
[11:42] <x-f> "Unsupported major.minor version 51.0"
[11:42] <mattbrejza> time is being used for making payload PCBs atm
[11:42] <mattbrejza> yea its just your java version
[11:43] <SQ9DIQ> I'll be trying to listen balon freq & SR9SK
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[12:20] <craag> second SP9UOB up
[12:22] <fsphil> that was quick
[12:24] <SQ9DIQ> I hear it S9 +10dB
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[12:37] <SQ9DIQ> works much better, more stable freq.
[12:40] <WILLdude> Urgh. My parents won't let me build a PC.
[12:41] <WILLdude> It's too much money apparently, even though it's all mine.
[12:41] <WILLdude> They said they'd consider it if it was under £ £3--
[12:42] <WILLdude> £300
[12:42] <eroomde> a raspeberry pi farm
[12:42] <WILLdude> £530 ins't bad foa good quad core amd rig with a 7870 gpu.
[12:43] <WILLdude> *isn't
[12:43] <WILLdude> Wonder how that'd do at bitcoin mining.
[12:43] <costyn> man it sure is nice being an adult :)
[12:43] <costyn> disposable income ftw
[12:43] <eroomde> i thought bitcoin mining wasn't economic anymore
[12:44] <fsphil> yea but stuck at work so can't spend it on long holidays :)
[12:44] <eroomde> be a teacher
[12:44] <Brace> costyn: do we want to tell him about all the sucky downsides to being an adult
[12:44] <fsphil> haha
[12:44] <Brace> ?
[12:44] <WILLdude> eroomde: It kinda is almost.
[12:44] <WILLdude> I just wanna gamble it.
[12:45] <fsphil> you'd probably spend more in electricity
[12:45] <costyn> fsphil: yea true.. as a teenager you have lots of free time, but no money, as an adult you have lots of money but no free time
[12:46] <WILLdude> But I don't pay for electricity.
[12:46] <WILLdude> :)
[12:47] <Brace> costyn: and you have to do all the boring tasks that come with being an adult
[12:47] <eroomde> i want a PA
[12:47] <fsphil> oooh MET BALLOON RELEASE not far from here
[12:47] <costyn> Brace: yup, still on the whole I think there are more upsides :)
[12:47] <WILLdude> ARRRgh
[12:48] <WILLdude> So annoyed.
[12:48] <Brace> a skateboarding friend of mine once told me when I was young that I shouldn't do anything but skate and f*** women when I'm older, this was cause he had to go and get his washing machine fixed
[12:49] <Brace> i.e. dullarse task taking up all your free time...
[12:49] <Babs> Mining via a bot is the only way that works economically anymore. It is still net loss making (i.e. bitcoin value < cost of electricity for mining bitcoins) on your own but via a bot works well because you are essentially getting everyone else to pay for the electricity.
[12:50] <WILLdude> A bot?
[12:50] <Babs> It's analogous to Nigerians tapping off oil from the pipelines that travel through their country
[12:51] <WILLdude> I think it's because they don't think I'll build it properly.
[12:51] <Babs> Willdude - as in a program that is installed on someone else's computer to operate autonomously. But this one is without their knowledge.
[12:52] <WILLdude> Making a virus to do it then?
[12:52] <WILLdude> Doing in a pool works.
[12:52] <WILLdude> It can sometimes pay.
[12:52] <fsphil> do they let laptops into swimming pools?
[12:53] <Babs> Yes exactly, but don't go doing that, your parents are already nervous enough about this group.....
[12:53] <WILLdude> Also, people's computers would probably be on anyway.
[12:53] <WILLdude> It's called pooled mining.
[12:53] <Babs> True, like the SETI screensaver principle
[12:53] <WILLdude> THEY ARE SO ANNOYING.
[12:53] <Babs> which is still yet to find anything
[12:53] <Brace> WILLdude: just tell them at least you're not taking drugs
[12:54] <Brace> that'll shut them up and get you the PC
[12:54] <Brace> or you'll get grounded
[12:54] <costyn> lol
[12:54] <Brace> could go either way
[12:54] <Babs> SETI is analogous to Nigerians tapping off oil from the pipelines that travel through their country, only for both parties to find out the oil doesn't burn anyway.
[12:55] <WILLdude> That would sound like I'm implying they are.
[12:55] <costyn> Babs: lol
[12:55] <WILLdude> SETI is a bit pointless.
[12:56] <fsphil> more pointless than country music?
[12:56] <fsphil> cause that really has no point
[12:56] <fsphil> or musical content
[12:56] <eroomde> also a sphere
[12:56] <Brace> fsphil: proper country music is good
[12:56] <Babs> It's a bit pointless until they find Flash Gordon pootling around Betelgeuse
[12:56] <Brace> pop country music is bad
[12:57] <fsphil> Gordon's alive?
[12:57] <WILLdude> I'm still damn annoyed.
[12:57] <Babs> Jazz is the worst. In the words of Tony Wilson "Jazz is the last refuge of the untalented. Jazz musicians enjoy themselves more than anyone listening to them does"
[12:57] <fsphil> lol
[12:57] <WILLdude> They think I could get an equivalent PC for the same price
[12:57] <eroomde> easy Babs
[12:58] <Babs> fsphil - he may well be, but SETI is still yet to confirm it
[12:58] <Babs> eroomde - please tell me you aren't a jazz fan
[12:59] <Babs> Although programming a GPS in front of a group whilst simultaneously playing jazz flute would be very impressive
[12:59] <WILLdude> 7870s aren't common in commericially built PCs
[13:00] <Brace> WILLdude: can you skimp on something else
[13:00] <Brace> and then upgrade that in a couple of months time
[13:00] <Brace> when they might not notice
[13:00] <eroomde> Babs: http://www.youtube.com/watch?v=vxB-LbcZITU
[13:00] <costyn> eroomde: This video is not available in your country.
[13:00] <costyn> bah
[13:01] <eroomde> just look for oscar peterson playing a solo
[13:01] <WILLdude> Brace:Not really.
[13:01] <WILLdude> That's a waste anyway.
[13:02] <WILLdude> URRRGH!
[13:05] <Brace> yeah, but then you'll have spare parts which you'll use in the future
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[13:05] <Brace> or if something breaks
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[13:19] <eroomde> Babs: or alternatively (now i'm in a jazz piano youtube groove) http://www.youtube.com/watch?v=KxadblDT6zI
[13:20] <eroomde> there are lots of amusing stories of vladimir horowitz not understanding how art tatum could keep improvising variations on the fly
[13:21] <Geoff-G8DHE> Whats happening with SP9UOB, looks like its flying a second time ? The first was lost I thought ?
[13:29] <daveake> 2nd flight
[13:29] <daveake> 2nd tracker
[13:31] <OM1ATS> second fail ?
[13:31] <SP9UOB_Tom> :-(
[13:31] <SP9UOB_Tom> ewen watchdog doesnt work
[13:32] <SP9UOB_Tom> really strange
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[13:32] <Babs> eroomde: also technically impressive http://www.youtube.com/watch?v=9nNGlaiVypU .
[13:33] <SQ9DIQ> only carrier frequency
[13:33] <Babs> apparently its really difficult to play like that
[13:33] <eroomde> yes very
[13:33] <Babs> I don't think he has quite the same kudos as Fats Waller however
[13:33] <eroomde> i spent ages trying
[13:33] <SP9UOB_Tom> those 1.8V boards seems to dont work well
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[13:34] <SP9UOB_Tom> ok its lost :-(
[13:34] <SQ9DIQ> get off, or discharge
[13:34] <Babs> I had a mate at college who I knew for 3 years before I knew he played the piano. One day, someone popped a piano in the common room and he jumped on it and did the full Les Dawson thing. It was pretty impressive.
[13:34] <OM1ATS> YES
[13:35] <SP9UOB_Tom> ist back :-)
[13:35] <SQ9DIQ> :)
[13:35] <eroomde> http://www.youtube.com/watch?v=WWDphFwocAM
[13:35] <SP9UOB_Tom> its behaver exactly like first flight
[13:36] <SP9UOB_Tom> behaves
[13:36] <Babs> nice.
[13:36] <OM1ATS> Oh without decoding and now is silent :(
[13:38] <daveake> oops
[13:38] <SP9UOB_Tom> im think, its because im running MCP1640 out-of-spec
[13:39] <daveake> I suggest you don't try a 3rd flight then :)
[13:39] <daveake> What balloons were they?
[13:39] <SP9UOB_Tom> im change to 3v3 and launch on 4th may
[13:39] <SP9UOB_Tom> daveake: 100g kaysam
[13:40] <daveake> ah ok not too expensive then :)
[13:40] <SP9UOB_Tom> its woke
[13:40] <SP9UOB_Tom> but not decoding
[13:41] <SP9UOB_Tom> and off again
[13:42] <eroomde> well we're decreasing the varience on our estimate that these trackers don;t work, at least
[13:42] <Geoff-G8DHE> Whats out of spec SP9UOB_Tom IP voltage for currrent drawn ?
[13:42] <SP9UOB_Tom> Geoff-G8DHE: output voltage
[13:42] <Babs> Narcolepsy HAB
[13:42] <SP9UOB_Tom> Geoff-G8DHE: datasheet says 2V
[13:43] <SP9UOB_Tom> im, running @1.8
[13:43] <daveake> or less
[13:43] <Geoff-G8DHE> Ah right your looking for 1.8v out
[13:45] <OM1ATS> Tomek I know what's wrong, had to let go of a red balloon from Radim :)
[13:49] <SP9UOB_Tom> ;-)
[14:00] <OM1ATS> I think it's a problem in the MCP1640 ?
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[15:10] <Lunar_Lander> hello
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[15:23] <Lunar_Lander> the club of silence
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[15:23] <Lunar_Lander> XD
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[15:51] <fsphil> ah well he's ruined it now. we might as well all speak again now
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[15:55] Action: SP9UOB_Tom is ruined ;-(
[15:58] <eroomde> lots of expensive hardware sacrificed to Mother Stratosphere
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[15:58] <eroomde> let's hope she is placated
[15:58] <Lunar_Lander> ?
[15:58] <eroomde> ? yourself Lunar_Lander
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[16:03] <Laurenceb> how is humour formed
[16:04] <daveake> ???
[16:07] <Lunar_Lander> what in the WORLD has happened?
[16:07] <daveake> That's a big ?
[16:08] <Laurenceb> instane mother
[16:09] number10 (569e9134@gateway/web/freenode/ip.86.158.145.52) joined #highaltitude.
[16:09] <eroomde> instane in the mem?????
[16:10] <Babs> instane in the brain!
[16:10] <Babs> i win
[16:10] <Laurenceb> eroomde form babby?
[16:10] <Babs> *bows
[16:10] <Lunar_Lander> people, I launched a HAB, you don't need to treat me like a guy who hasn't done it yet
[16:10] <Lunar_Lander> xD
[16:10] <eroomde> if only it was that simple, poppet
[16:12] <WILLdude> What does ?? do ?
[16:12] <eroomde> that ^
[16:13] <eroomde> ??msg
[16:13] <Laurenceb> ???
[16:13] <x-f> !!
[16:13] <eroomde> ??summon
[16:13] <Laurenceb> one
[16:13] <eroomde> summon??
[16:13] <eroomde> !summon??
[16:13] <Babs> http://en.wikipedia.org/wiki/Insane_in_the_Brain - WILLdude, I expect you were no more than a twinkle in your mother's eye when that was released
[16:13] <x-f> no worky
[16:13] <eroomde> !sumeraian
[16:14] <eroomde> it has as well
[16:14] <WILLdude> Babs: Huh?
[16:14] <WILLdude> Wha?
[16:14] Thorbot_ (1fdd51ca@gateway/web/freenode/ip.31.221.81.202) joined #highaltitude.
[16:15] <WILLdude> WTF?
[16:15] <Thorbot_> You're an amateur Zeusbot
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[16:16] <Lunar_Lander> hi RocketBoy
[16:16] <WILLdude> IDK]
[16:16] <WILLdude> What did that do?
[16:16] <WILLdude> I'm trying to figure out what that does.
[16:16] WILLdudesmother (1fdd51ca@gateway/web/freenode/ip.31.221.81.202) joined #highaltitude.
[16:16] <WILLdude> Why did it respond??
[16:16] <WILLdudesmother> Afternoon homies
[16:16] <x-f> OH NOES
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[16:17] <WILLdudesmother> William, its time for your tea
[16:17] <WILLdude> GO away laurence.
[16:17] <WILLdudesmother> and don't even think about buying those PC components
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[16:17] <Lunar_Lander> ROFL
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[16:17] <WILLdude> Who dafuq was that?
[16:17] <Steffanx> Your mother
[16:17] <eroomde> not sure, signed in on webchat
[16:17] <Babs> Who knows?
[16:18] <x-f> nicknames don't lie
[16:18] <eroomde> the preferred tool of those wishing to hide
[16:18] <WILLdude> Really now.
[16:18] <WILLdude> Arrgh.
[16:18] <WILLdude> Seriouslly.
[16:18] <WILLdude> That wasn't funny
[16:18] <WILLdude> *seriosuly
[16:18] <WILLdude> *seriously
[16:18] <x-f> i giggled
[16:18] <Laurenceb> Q: Why do they bury Germans 20 meters underground? A: Because deep down they are really nice.
[16:19] <Laurenceb> ^ attn Lunar
[16:19] <WILLdude> Seriously, who did that?
[16:19] <mattbrejza> your mum
[16:19] <WILLdude> 31.221.81.202
[16:19] <Lunar_Lander> Laurenceb, xD
[16:19] <WILLdude> That has really annoyed me now.
[16:19] <WILLdude> I hate maternal insults.
[16:20] <Laurenceb> Q: What's the difference between a German and a shopping trolley? A: A shopping trolley has a mind of its own.
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[16:20] <Lunar_Lander> XD
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[16:20] <Laurencebisanidi> Urgh.
[16:20] <Laurencebisanidi> Doesn't fit
[16:20] <Laurenceb> wtf
[16:20] <Laurenceb> im seeing double
[16:21] <Laurencebisanidi> ot
[16:21] Nick change: Laurencebisanidi -> Trollence
[16:21] <Trollence> LOLence
[16:21] <Laurenceb> yo
[16:21] <Laurenceb> whats up?
[16:21] Nick change: Trollence -> Laurenceisanidio
[16:22] <Laurenceisanidio> t
[16:22] <Laurenceb> fail
[16:22] <Laurenceb> truly epic fail
[16:22] <x-f> he thinks you're his mother
[16:22] Nick change: Laurenceisanidio -> StopWithMaternal
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[16:22] <StopWithMaternal> insults
[16:22] <Laurenceb> lol we scared daveake
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[16:23] <eroomde> anyway, perhaps enough OT shenanigans now kiddywinks
[16:23] <WILLdude> Pretending to be my mother is extremely insulting.
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[16:24] <arko> morning
[16:24] <WILLdude> Morning.
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[16:33] <Lunar_Lander> hi mclane
[16:33] <Lunar_Lander> how is it going?
[16:36] <WILLdude> Babs: pm
[16:37] <mattbrejza> use more proxies next time ;)
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[16:41] <mclane> what happened to sp9uob?
[16:42] <mattbrejza> the regulator doesnt seem reliable at 1.8V
[16:42] <mattbrejza> also there were two seperate launches
[16:42] <eroomde> what kinda regulator was it?
[16:42] <eroomde> there are all sorts of switcher failure modes
[16:42] <mattbrejza> mcp1640
[16:43] <mattbrejza> tom reckoned it was running out of spec
[16:43] <eroomde> oh yes, it's only rated to 2.0V from an initial google
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[17:09] <SP9UOB_Tom> hi all
[17:10] <SP9UOB_Tom> payload was found :-)
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[17:12] <craag> SP9UOB_Tom: :D it came back to life?
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[17:14] <SP9UOB_Tom> no, styrofoam blow the capsule
[17:14] <SP9UOB_Tom> Poliethylen
[17:14] <SP9UOB_Tom> foam
[17:17] <SP9UOB_Tom> blow the capsule from inside
[17:17] <SP9UOB_Tom> possibly also crack the PCB
[17:20] <fsphil> it expanded?
[17:20] <fsphil> or exploded?
[17:20] <x-f> how was it found?
[17:20] <SP9UOB_Tom> fsphil: dont know yet- waiting for photos.
[17:21] <fsphil> ah
[17:21] <SP9UOB_Tom> x-f: i've pickup call from very nice girl :-)
[17:21] <SP9UOB_Tom> x-f: she found it near the road
[17:21] <x-f> very nice :)
[17:24] <chrisstubbs> SP9UOB_Tom, Result! :)
[17:35] <Lunar_Lander> SP9UOB_Tom, COOL
[17:35] <Lunar_Lander> what was on the payload?
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[17:38] <SP9UOB_Tom> Lunar_Lander: https://www.facebook.com/photo.php?fbid=4040450949814&set=np.137050815.100000473142757&type=1&theater
[17:39] <Lunar_Lander> :)
[17:39] <Lunar_Lander> I meant the technical specs
[17:39] <Maxell> https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-ash3/482398_4040450949814_448612608_n.jpg
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[17:40] <Maxell> ^ if you don't have faceboo
[17:42] <SP9UOB_Tom> Lunar_Lander: it was my pico tracker: http://sp9uob.verox.pl/pico/pico1.jpg RFM22, MAX6 and PIC18LF26k22
[17:42] <Lunar_Lander> cool
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[17:49] <number10> SP9UOB_Tom: I probably asked this before - what stepup component do you use
[17:50] <SP9UOB_Tom> number10:MCP1640
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[17:50] <number10> ta
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[17:58] <Lunar_Lander> hi mattltm
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[18:20] <RocketBoy> hey SP9UOB_Tom: I'm using RFM22 MAX6 PIC18LF26K80 and LTC3526 - http://randomaerospace.com/hidden/Hidden_Bits/uXABEN.html
[18:21] <Lunar_Lander> RocketBoy, cool
[18:21] <Lunar_Lander> this is the first time I think I see one of your payloads
[18:21] <RocketBoy> (uses the 4MHz RFM clock out for the PIC
[18:22] <RocketBoy> yeah - i'm not one to self publicise
[18:23] <mattbrejza> hmm, why does noone else do the clock thing
[18:24] <mattbrejza> probably for the same reason the two pin ntx2 thing survived so long
[18:24] <RocketBoy> no idea - works for me
[18:24] <craag> I didn't know it did a 4MHz clock... nice!
[18:24] <RocketBoy> never used the 2 pin NTX2 drive either
[18:25] <daveake> I scratched my head when I saw that
[18:25] <RocketBoy> I think it can do all the way up to 16MHz
[18:25] <daveake> wondering what I'd missed
[18:25] <RocketBoy> but the 1.8V pic won't go that fast
[18:25] <mattbrejza> no divider on the clock input?
[18:25] <RocketBoy> nope
[18:26] <RocketBoy> jus straight drive
[18:26] <RocketBoy> then the rfm boots it comes up at 1MHz
[18:26] <RocketBoy> then the pic re-prigs to 4MHz
[18:27] <SP9UOB_Tom> RocketBoy: sure it go!
[18:27] <RocketBoy> re-progs
[18:27] <SP9UOB_Tom> RocketBoy: 20 MHz @1.8V (-40 C)
[18:27] <mattbrejza> does it have to be at 4Mhz? (ive never used a rfm)
[18:27] <SP9UOB_Tom> Note 1: Maximum Frequency 20 MHz, 1.8V to 2.7V, -40°C to +85°C
[18:28] <RocketBoy> PIC?
[18:28] <SP9UOB_Tom> RocketBoy: PIC18LF26K22
[18:28] <RocketBoy> or RFM?
[18:28] <SP9UOB_Tom> PIC
[18:28] <RocketBoy> humm let me check
[18:29] <craag> Hmm wouldn't 1MHz be adequate for running the PIC/AVR anyway?
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[18:32] <SP9UOB_Tom> RocketBoy: page 428 :-)
[18:32] <SP9UOB_Tom> RocketBoy: anyway, i've got nice package from You :-)
[18:34] <RocketBoy> The 26K22 seems better in that respect - although I'll think I'll stick with 4MHz to save power
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[18:35] <SP9UOB_Tom> RocketBoy: i'm running 8 MHz and turning PLL on for APRS (PWM audio out)
[18:36] <SP9UOB_Tom> it gives 32MHz (@3v3)
[18:36] <RocketBoy> humm - yeah I know people are using PWM for APRS and it must work - but the maths says the audio will be poor
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[18:38] <RocketBoy> at least unless its running at a higher clock frequency
[18:38] <SP9UOB_Tom> RocketBoy: @32Mhz clock and 19200kHz sampling rate is very nice :-)
[18:38] <Lunar_Lander> RocketBoy, I got a question
[18:39] <RocketBoy> how many bits?
[18:39] <Lunar_Lander> we once talked about cutdowns and you said that sometimes you use a resistor instead of a nichrome wire I think
[18:39] <Lunar_Lander> why is that?
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[18:40] <RocketBoy> the resistor design is much more compact for one
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[18:41] <Lunar_Lander> ok
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[18:43] <Lunar_Lander> and what resistor is good?
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[18:50] <Lunar_Lander> if I may ask
[18:51] <SpeedEvil> find a ceramic one rated for 350c
[18:51] <daveake> If you mean "what resistance?" then the answer depends on the voltage applied, of course
[18:51] <daveake> and get a (physically) small one
[18:52] <SpeedEvil> farnell had a nice parametric selector
[18:52] <SpeedEvil> has
[18:53] <SpeedEvil> in principle, you can use any resistor, and hope it survives the pulse, but why not use one rated for it.
[18:56] <RocketBoy> SP9UOB_Tom: here is a paper I wrote explaining why you will only get about 6 bits of DAC resolution using PWM at 32MHz http://wiki.ukhas.org.uk/_media/communication:pwm_daca.pdf
[18:56] <SP9UOB_Tom> Lunar_Ladder: anyway its makes me laugh: http://sp9uob.verox.pl/pliki/bohr.jpg
[18:57] <jarod> lol
[18:57] <RocketBoy> unless you want to use a higher order filter
[18:58] <Laurenceb_> ive used 10 ohm 0.125watt run from 5v
[18:58] <Lunar_Lander> SP9UOB_Tom, ROFL
[18:58] <Laurenceb_> but it wont reliably cut nylon
[18:58] <Lunar_Lander> hm
[18:58] <Laurenceb_> you need something like polythene
[18:58] <RocketBoy> I think dyneema is a better choice
[18:58] <Lunar_Lander> for the rope to be cut?
[18:58] <SP9UOB_Tom> RocketBoy: radio itself has filter in audio path
[18:58] <RocketBoy> what order is it?
[18:59] <SP9UOB_Tom> RocketBoy: it depends of radio used :-)
[19:00] <RocketBoy> assuming hx1?
[19:00] <SP9UOB_Tom> no :-)
[19:00] <SP9UOB_Tom> anyway for hx1 im using opamp for filtering and preemphasis
[19:01] <SP9UOB_Tom> MCP607
[19:02] <SP9UOB_Tom> HX1 needs preety high amplitude on input
[19:02] <SP9UOB_Tom> to maitain decent deviation
[19:03] <RocketBoy> anyway I was going to say that the onboard 5bit flash DAC on the PIC is probably a better choice - the resolution is probably going to be as good and there is no need to run at 32MHz
[19:05] <SP9UOB_Tom> RocketBoy: I'll check it :-)
[19:05] <Lunar_Lander> hm
[19:05] <Lunar_Lander> 2.5 Ohm resistor
[19:06] <RocketBoy> humm - can't seem to find it in the 26K22
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[19:07] <RocketBoy> oh yeah it is there - fig 22-1
[19:07] <Lunar_Lander> only have wirewound resistors
[19:08] <daveake> The idea is to give it more power than it's designed for :)
[19:09] <RocketBoy> yeah
[19:09] <RocketBoy> the MF40 resistors are the ones I use
[19:09] <SP9UOB_Tom> RocketBoy: there is FVR
[19:10] <RocketBoy> they take 0.4W
[19:10] <RocketBoy> in a 0.128W package
[19:12] <Lunar_Lander> ah
[19:12] <RocketBoy> SP9UOB_Tom: FVR is one of the input sources to the DAC - Vdd is what I use
[19:13] <Lunar_Lander> farnell doesn't have those
[19:13] <RocketBoy> yeah
[19:13] <RocketBoy> they do the 0.125W type
[19:13] <Lunar_Lander> ah
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[19:14] <RocketBoy> in any event you are going to need to run them at more than their rated value
[19:15] <RocketBoy> still its simple enough to change for the next flight of you are that worried
[19:16] <RocketBoy> teeny 3.2 x 1.5mm size - http://www.rapidonline.com/Electronic-Components/MF40-0-4W-1-Metal-film-31432
[19:16] <Lunar_Lander> ah cool
[19:17] <Lunar_Lander> so "4r7 0.4w Metal Film Resistor - Pack of 100" means 4.7 ohms?
[19:20] <RocketBoy> yep 4r7 is 4.7ohm
[19:20] <RocketBoy> they are rated to at least 155deg C
[19:21] <RocketBoy> the way I read it they will continuously stand a surface temperature of 155deg C
[19:21] <Lunar_Lander> ah
[19:22] <RocketBoy> Dyneema® has a melting point between 144 and 152 º C
[19:22] <Lunar_Lander> so the cutdown rope should be made of that?
[19:22] <RocketBoy> try it
[19:22] <RocketBoy> nylon is about 250C
[19:23] <Lunar_Lander> yes
[19:23] <RocketBoy> Ive used nylon before and its worked
[19:23] <Lunar_Lander> do you have Dyneema in your store?
[19:23] <RocketBoy> nope
[19:23] <RocketBoy> see your local fishing shop
[19:24] <RocketBoy> ask for spectra
[19:24] <Laurenceb_> ive used 0.125W 10ohm with 5v before
[19:24] <daveake> or ebay
[19:24] <Laurenceb_> gets to about 350C surface temp at 20C room
[19:24] <Lunar_Lander> ok
[19:24] <Laurenceb_> so not really hot enough for nylon
[19:25] <Lunar_Lander> so "10r 0.4w Metal Film Resistor - Pack of 100" these?
[19:25] <Laurenceb_> i used polythene
[19:25] <Lunar_Lander> ah
[19:25] <RocketBoy> I'd go for 4r7
[19:25] <Laurenceb_> yeah
[19:26] <daveake> otherwise you need many volts
[19:26] <RocketBoy> thats about 4W at 4.5V
[19:26] <Laurenceb_> theres a limit to how far you should go
[19:26] <Laurenceb_> or it will burn up too fast
[19:26] <RocketBoy> when the r burns out
[19:26] <daveake> When I tested with nichrome I found 4W was about right
[19:26] <Laurenceb_> i tried 2.2ohm and 10, and settled on 10
[19:26] <Laurenceb_> but 4r7 would probably be a bit better
[19:27] <RocketBoy> be interesting to see how long the Rs last
[19:27] <Lunar_Lander> yea
[19:27] <Lunar_Lander> I had about
[19:27] <Lunar_Lander> I calculated that last week
[19:27] <Lunar_Lander> one moment
[19:27] <Laurenceb_> 10ohm 0.125W on 5v will run ok for ~10minutes
[19:27] <Laurenceb_> the coating is extremely singed
[19:27] <Lunar_Lander> 1.77 Ohms with 5V (3x Energizer AA) so about 2 Amps
[19:28] <Lunar_Lander> that is 10 W
[19:28] <RocketBoy> I guess you are looking for it to run no more than 30 sec
[19:28] <daveake> too much
[19:28] <Laurenceb_> i ran for 10 seconds in my cutdown code
[19:28] <RocketBoy> if it aint cut through in 30sec its too long anyway
[19:28] <daveake> (10W I mean)
[19:28] <daveake> indeed
[19:28] <Laurenceb_> with ground tests it took <2.5S
[19:28] <Laurenceb_> (with the 10ohm setup)
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[19:31] <RocketBoy> the resistor cutdown is one of my favourite designs - simple & elegant - Laurenceb's idea
[19:32] <Laurenceb_> TYVM :D
[19:32] <Laurenceb_> yeah - tried it on my first HAB, which had an ericsson t-26 using SMS
[19:33] <RocketBoy> NP - although I have to say I prefer the pyro cutdowns for reliability
[19:34] <Lunar_Lander> hm
[19:35] <Laurenceb_> yeah the machanical design is a little faffy
[19:35] <Laurenceb_> you need the cord to be pulled tights against the resistor
[19:35] <Laurenceb_> *tight
[19:35] <RocketBoy> yeah - thats the bit i don't like
[19:35] <Laurenceb_> but not the full payload weight to be supported on the resistor
[19:36] <Laurenceb_> and you dont want it to shake off
[19:36] <Laurenceb_> i seemed to get the issues ironed out with lots of ground tests
[19:36] <RocketBoy> if is a balloon remnant cut-away then there is no guarantee of that
[19:36] <Laurenceb_> tried it 5 times at altitude and it worked ok
[19:36] <Laurenceb_> yeah - wont work for that
[19:36] <RocketBoy> yeah - its good as a cut-down
[19:37] <RocketBoy> as in the balloon hasn't burst
[19:37] <RocketBoy> yet
[19:37] <Laurenceb_> i also used the cable as a 27mhz antenni on my rogallo
[19:37] <RocketBoy> :-)
[19:37] <Laurenceb_> with chokes to control the rf
[19:39] <Lunar_Lander> yea
[19:39] <Lunar_Lander> the damn arduino code
[19:39] <RocketBoy> yeah - all arduino code is damn
[19:39] <RocketBoy> ed
[19:41] <Laurenceb_> hehe
[19:41] <Laurenceb_> theres some good libraries in there, but overall... its just so bad
[19:42] <Lunar_Lander> why?
[19:42] <Laurenceb_> poorly designed
[19:43] <Lunar_Lander> could it be made better?
[19:44] <Laurenceb_> hard to say.. the ways it is used, probably not
[19:46] <RocketBoy> agree
[19:47] <Lunar_Lander> hm
[19:47] <Lunar_Lander> doesn't sound that good
[19:49] <Laurenceb_> wtf wikipedia
[19:49] <Laurenceb_> http://en.wikipedia.org/wiki/Shale_oil
[19:49] <Laurenceb_> http://en.wikipedia.org/wiki/Oil_shale
[19:49] <Laurenceb_> seriously
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[19:49] <Laurenceb_> utterly different things
[19:50] <SP9UOB_Tom> Want fine code? Write Your own (for pic ofcourse ;-)
[19:50] <Laurenceb_> or avr, or arm.. or whatever :P
[19:50] <Laurenceb_> i use arm for everything nowadays
[19:52] <Lunar_Lander> yea
[19:53] <Lunar_Lander> shall I now hit my AVRs with a hammer or so?
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[20:01] <codrBlu> I'm working on a flight computer based on a 3.3V Arduino Pro Mini which reads data from the GPS, stores in on an SD card and then transmits the data over APRS. I could certainly use some feedback on whether I have missed anything in how I am wiring up the components. Thanks if you can have a look: https://docs.google.com/drawings/d/1e-NiHD_8oHwS_RBc_J0wTqoCtyc1oWo574t-cEKnI2w/edit?usp=sharing
[20:02] <Lunar_Lander> ah arduino is very inefficient code
[20:02] <Lunar_Lander> but we can't change that :(
[20:03] <codrBlu> True. I hope to graduate to custom boards, possibly with better chips, but for now I am learning. :-)
[20:03] <nigelvh> codrBlu, the arduino works fine.
[20:03] <nigelvh> Many of us use arduino for our stuff.
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[20:04] <Lunar_Lander> yea me too
[20:04] <nigelvh> and, at a glance, your diagram looks reasonable
[20:04] <Lunar_Lander> but it makes me sad :(
[20:04] <codrBlu> One thing I'm unclear on is that I understand the logic for the HX1 will work at 3.3V, but do I still need to supply 5V to it?
[20:04] <nigelvh> Yes
[20:04] <codrBlu> Lunar, what makes me sad is me using all these separate breakout boards, but I will need more time to design and fabricate a custom PCB for the next launch.
[20:05] <Lunar_Lander> yea
[20:05] <nigelvh> codrBlu, arduino does have some issues/inefficiencies in the code. But part of that is them trying to make it easy/safe.
[20:06] <codrBlu> True, and safe/easy is what I need right now.
[20:06] <nigelvh> If you don't want the inefficiencies, write the raw c in arduino, and you get the benefit of the same chip, same boot loader, save dev environment, but get the efficiency of not using their methods.
[20:06] <griffonbot> Received email: Davejay "[UKHAS] Selling off Kit - Balloon - Arduino - GPS Shield Logger"
[20:06] <nigelvh> So instead of digitalWrite(PINNUMBER); use PORTD = B00101001;
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[20:07] <mclane> codrBlu why do you use i2c to connect to the uBlox?
[20:07] <codrBlu> Hmm. I've never looked into the capability of writing arduino code in C.
[20:08] <codrBlu> Mclane, only because that is the example I found. Recommendations?
[20:08] <nigelvh> mclane, on single port arduinos, it may be preferable to use i2c rather than the serial port to maintain easy programming.
[20:08] <mclane> you can use the uart
[20:09] <daveake> Same deal on the Pi - use i2c for the GPS then the serial is free (for RTTY)
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[20:10] <natrium42> who was it again that reverse engineered the spot connect bluetooth protocol?
[20:10] <mclane> then you may need some pullup resistors on the i2c lines (if they are not provided on the breakout boards)
[20:10] <Maxell> http://ukhas.org.uk/guides:sdr_tracker <-- Why don't you tell the user to enable Offset tuning and enable IQ balance. It fixes the DC spike :-)
[20:11] <craag> Maxell: Offset tuning wasn't a feature when that was written I think. Feel free to update it!
[20:11] <nigelvh> Yes, 1k pull-ups on the i2c lines are good.
[20:12] <Maxell> Hmm
[20:16] <Lunar_Lander> nigelvh, what you wrote, the PORTD thing
[20:16] <Lunar_Lander> how do you set the number of the pin and the high or low argument?
[20:16] <RocketBoy> Lunar_Lander: Just tried dyneema and 4r7 on 3 x AA - still cutting line after a minute - looks a bit charred though
[20:17] <Lunar_Lander> OK
[20:17] <codrBlu> So now I'm wondering if the Radiometrix HX1 even requires 5V, so maybe I can just power it from 3.3V. Would that decrease the output power?
[20:18] <nigelvh> Lunar_Lander, http://www.arduino.cc/en/Reference/PortManipulation
[20:19] <Lunar_Lander> ah thanks
[20:22] <SP9UOB_Tom> codrBlu: 5V and requires preety high amplitude on input
[20:22] <codrBlu> So you cannot run an HX1 from a 3.3V Arduino?
[20:23] <SP9UOB_Tom> sure You can, just add step-up and opamp :-)
[20:23] <nigelvh> You don't need that.
[20:24] <nigelvh> I've done modulation of the hx1 with a series capacitor instead of the series resistor, and a 2Vp-p signal
[20:24] <nigelvh> 3.3V will work just fine.
[20:25] <codrBlu> Did the transmit power decrease by using 2V?
[20:25] <nigelvh> No, the voltage input only affects modulation, 5v would be far overdeviating.
[20:25] Nick change: MichaelC -> MichaelC|Away
[20:25] <nigelvh> (For a standard +/-5KHz VHF channel)
[20:28] <chrisstubbs> Finally got an OS installing on my new server. the "OS Install Mode" just made the installer bluescreen :P
[20:31] <Lunar_Lander> XD
[20:39] <RocketBoy> Lunar_Lander: http://randomaerospace.com/hidden/Hidden_Bits/4r7CutDown.html
[20:40] <RocketBoy> that was after 1min on 3 x AAs
[20:41] <Lunar_Lander> thanks
[20:41] <RocketBoy> its 100 pound dyneema
[20:42] <Lunar_Lander> ah
[20:42] <Lunar_Lander> can you tell me what happens?
[20:42] <Lunar_Lander> even VLC player can't play it
[20:42] <nigelvh> Won't seem to play for me either.
[20:43] <chrisstubbs> Same, just crashed FF
[20:43] <chrisstubbs> Good ol' quicktime
[20:43] <Laurenceb_> loading here...
[20:43] <nigelvh> Oop, there it goes.
[20:43] <nigelvh> Took a long time.
[20:43] <Laurenceb_> loading...
[20:44] <Laurenceb_> "no codec"
[20:44] <craag> iCod codec.. never heard of that one!
[20:45] <Laurenceb_> No packages with the requested plugins found
[20:45] <Laurenceb_> hehe iCod
[20:45] Nick change: heathkid|2 -> heathkid
[20:47] <Laurenceb_> fish with an iphone?
[20:49] <daveake> a very scalable solution
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[20:56] <chrisstubbs> driver
[20:56] <chrisstubbs> irc != google
[20:57] <heathkid> anyone here using APRSIS32?
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[20:58] <heathkid> it't uploading data from my tracker but it's WAY off (by probably 30 miles)...
[20:58] <heathkid> thoughts?
[20:58] <heathkid> it's
[20:58] <nigelvh> It only uploads what it hears
[20:58] <chrisstubbs> Your tracker may not be converting the coordinates correctly?
[20:58] <nigelvh> So make sure you're sending the data correctly.
[20:59] <RocketBoy> Lunar_Lander: ok youtube version http://www.youtube.com/watch?v=FoFrdCtXj8E
[20:59] <heathkid> If I manually convert them googlemaps is spot on
[20:59] <RocketBoy> like a knife through butter
[20:59] <nigelvh> That doesn't mean that it's properly formatted for APRS.
[20:59] <Lunar_Lander> thanks
[21:00] <heathkid> nigelvh: true enough
[21:01] <Lunar_Lander> RocketBoy, awesome!
[21:02] <RocketBoy> does need some tension on the line for it to work
[21:02] <heathkid> nigelvh: can I pm you?
[21:02] <RocketBoy> way better than nicrome IMO - nichrome designs always make me shudder when I see them
[21:02] <nigelvh> heathkid, sure.
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[21:05] <daveake> horrible stuff to use
[21:06] <codrBlu> What would be the best way to determine onboard, that balloon burst has occurred? Rapid altitude drop?
[21:07] <RocketBoy> the best way would be accelerometer IMO
[21:07] <RocketBoy> but I mostly use rapid drop on the GPS
[21:07] <RocketBoy> another good way is a line tension switch
[21:08] <codrBlu> Might accelerometer detection be fooled by wind buffeting on the way up?
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[21:10] <Lunar_Lander> daveake, why?
[21:10] <Lunar_Lander> and RocketBoy
[21:10] <RocketBoy> Id use a 3axis accelerometer and calculate the vector sum - and when gravity disappears the balloon has burst
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[21:11] <RocketBoy> what - nicrome - mostly beduse its resistance is so low unless you coil up about 1m
[21:11] <SP9UOB_Tom> "gravity disappears" Cool :-)
[21:11] <Lunar_Lander> but we want low resistance?
[21:11] <RocketBoy> free fall in a near vacumme
[21:12] <SP9UOB_Tom> RocketBoy: yes i know - but i want to feel it someday :-)
[21:12] <RocketBoy> nope - we want a resistance that gives us lots of dissipated power
[21:12] <jcoxon> eveninig all
[21:12] <RocketBoy> yo jcoxon
[21:12] <daveake> Indeed. We've had this discussion before LL
[21:13] <daveake> re "what length of nichrome" and "what gauge" and "what voltage?"
[21:13] <RocketBoy> yeah deja vous
[21:13] <daveake> <Clarkson> What you need is POOOWWWEER</clarkson"
[21:13] <daveake> How you get it is up to you
[21:14] <fsphil> onboard petrol generator
[21:14] <SP9UOB_Tom> deja vu - somebody makes changes in The Matrix ;-) LOL
[21:14] <BrainDamage> radioisotope thermoelectric generator
[21:14] <SP9UOB_Tom> fsphil: RTG
[21:14] <fsphil> nah, ZPM
[21:14] <SP9UOB_Tom> BrainDamage: :-)
[21:15] <x-f> generator with antimater engine
[21:15] <codrBlu> Wow. With an RTG onboard, your balloon could stay up forever!
[21:15] <fsphil> slightly less than forever
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[21:15] <BrainDamage> you're assuming the balloon envelope wouldn't degrade
[21:15] <codrBlu> UV stabilized balloon with an apparatus for absorbing moisture from the air and converting it to hydrogen.
[21:16] <fsphil> with a big enough rocket it could stay up forever
[21:16] <codrBlu> Rocket powered balloon. Nice.
[21:16] <SP9UOB_Tom> codrBlu: which air ;-) ?
[21:17] <codrBlu> Hmm. You may be right. I have no idea if there is any water vapor at 100,000ft.
[21:17] <fsphil> there is moisture up as far as 80km
[21:17] <x-f> noctilucent clouds
[21:17] <fsphil> yep
[21:18] <codrBlu> I can just see it now, writing software to analyze the camera feed and find clouds to fly into to replenish hydrogen.
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[21:24] Nick change: MoALTz_ -> MoALTz
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[21:29] <SP9UOB_Tom> http://sp9uob.verox.pl/sputnik-4/IMG_0069r.JPG
[21:29] <SP9UOB_Tom> todays launch
[21:30] <Lunar_Lander> SP9UOB_Tom, cool
[21:30] <cuddykid> that payload looks strangely familiar
[21:30] <SP9UOB_Tom> cuddykid: i have official UPU's approval ;-)
[21:31] <cuddykid> ha :)
[21:31] <Lunar_Lander> xD
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[21:36] <cuddykid> daveake: has the vid gone live yet?
[21:36] <cuddykid> daveake: that's the wedding dress
[21:38] <daveake> soooon
[21:38] <daveake> They have a posh launch party tomorrow
[21:38] <daveake> My invite seems to be lost in the post
[21:39] <cuddykid> that's awful
[21:39] <cuddykid> how dare they!
[21:39] <daveake> Oh I wouldn't have gone
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[21:39] <daveake> An evening with media types? I'd have just hit the drinks table
[21:40] <cuddykid> might see josh there.. ;)
[21:40] <daveake> Another reason for not going :)
[21:41] <SP9UOB_Tom> night all
[21:41] <daveake> nn
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[21:43] <Lunar_Lander> what about some australian music?
[21:44] <daveake> You better run, you better take cover
[21:44] <Lunar_Lander> yea :)
[21:45] <Lunar_Lander> http://www.jamendo.com/de/track/146047/possibly-human good song
[21:46] <Lunar_Lander> ah well german site
[21:46] <Lunar_Lander> just put an en where the de ist
[21:46] <Lunar_Lander> *is
[21:46] <Lunar_Lander> creative commons music :)
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[21:49] <RocketBoy> nights all
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[21:56] <Lunar_Lander> found dyneema cord on ebay
[21:56] <Lunar_Lander> a 270 m coil for some 14 euros
[21:56] <Lunar_Lander> enough for several flights
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[22:27] <Laurenceb_> http://www.youtube.com/watch?feature=endscreen&v=JUFntnLky_4&NR=1
[22:27] <Laurenceb_> oops
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[22:42] <Steffanx> whoa that smoke Laurenceb
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[00:00] --- Thu May 2 2013