highaltitude.log.20081003

[00:05] <Laurenceb_> yeah
[00:06] <Laurenceb_> same for all of them - we had presever round to treat them
[00:06] <Laurenceb_> SpeedEvil: what tools do you use for your STM32 work?
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[00:08] <Laurenceb_> hi natrium
[00:09] <Laurenceb_> oh well, got to get some sleep - need to pack tomorrow
[00:09] <Laurenceb_> cya all
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[09:11] <jcoxon> morning all
[09:15] <Shanuson> morning jcoxon
[09:17] <jcoxon> hey Shanuson
[09:19] <Shanuson> is someone of you working with an AT91SAM9263 ?
[09:20] <jcoxon> edmoore could well be
[09:20] <Shanuson> ok, i ask him when he's back
[09:20] <jcoxon> is that capable of running linux?
[09:22] <Shanuson> 32 bit mcu, yes it is
[09:24] <Shanuson> i work at an uni-praktika, got an evalution board with that mcu
[09:26] <jcoxon> oooo cool
[09:26] <Shanuson> well
[09:27] <Shanuson> there is a simple getting started demo which i get compiled but didnt work right
[09:28] <Shanuson> http://www.atmel.com/dyn/products/tools_card.asp?tool_id=4057
[09:28] <jcoxon> oh dear
[09:28] <jcoxon> not so good
[09:28] <jcoxon> whats the end product?
[09:29] <Shanuson> i should get linux working on that mcu, and a documented workflow how to get it running, and than do some benchmarks
[09:30] <Shanuson> atm they are looking at to possible solutions, a softcore, and that mcu, but i dont know what they will do with it at the end
[09:30] <Shanuson> -to + two
[09:32] <Shanuson> if they choose the atmel , there wil disigned a board with it. Its a group that works at cern, so maybe they need it at some detector
[09:34] <jcoxon> oh right
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[09:35] <Shanuson> problem, they never did anything with an atmel, so nobody can help me
[09:36] <Shanuson> and the helpcenter at atmel isnt answering too
[09:36] <jcoxon> morning rocketboy
[09:36] <jcoxon> Shanuson, i dont' think edmoore is very advanced in using it (if thats the one he has)
[09:36] <rocketboy> hi jcoxon
[09:36] <rocketboy> & eveyone
[09:37] <Shanuson> hehe
[09:38] <jcoxon> rocketboy, are you around today to perhaps set up the packet code?
[09:38] <Shanuson> i will ask him and see
[09:38] <Shanuson> join #atmel
[09:45] <rocketboy> jcoxon: yes I have the day off - I'll be in and out but I'm sure I han find an hour or so
[09:46] <jcoxon> okay cool
[09:46] <jcoxon> i've got the day off as well
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[09:47] <Laurenceb_> greetings
[09:48] <jcoxon> morning Laurenceb_
[09:48] <jcoxon> when does the PhD start?
[09:48] <Laurenceb_> monday
[09:48] <Laurenceb_> just packing atm
[09:48] <jcoxon> oh cool
[09:48] <Laurenceb_> :P
[09:49] <Laurenceb_> I can get paid for invigilating exams and supervising labs :D
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[09:49] <jcoxon> Laurenceb_, were does that mean you are baseD?
[09:50] <jcoxon> based?
[09:51] <Laurenceb_> university of surrey
[09:51] <jcoxon> :-)
[09:51] <Shanuson1> re
[09:52] <rocketboy> jcoxon: can you ping me an email - I have been having email probs recently - just want to see if its still there or gone
[09:53] <jcoxon> yup
[09:53] <jcoxon> done
[09:57] <rocketboy> ta - got it - must be OK now
[09:58] <jcoxon> cool
[09:59] <rocketboy> bbl - just going out for 2 hours
[09:59] <jcoxon> np
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[11:13] <rharrison> Morning all
[11:13] <jcoxon> hey rharrison
[11:15] <rharrison> Hi jcoxon You got the day off today
[11:15] <jcoxon> yup
[11:15] <rharrison> Lucky you. Are you working on beacon mkII?
[11:15] <rharrison> No news on last weeks loss?
[11:15] <jcoxon> nope
[11:15] <jcoxon> nothing
[11:15] <rharrison> :(
[11:15] <jcoxon> nah i'm working on Peg VI
[11:16] <rharrison> ooh Is there a web page for this?
[11:16] <jcoxon> http://www.pegasushabproject.org.uk/wiki/doku.php/missions:pegasus6
[11:16] <jcoxon> not much there yet
[11:17] <jcoxon> actually right now i'm working out how to have an upload script on my phone to the tracker
[11:19] <rharrison> What phone do you have?
[11:19] <rharrison> Nokia?
[11:19] <jcoxon> yeah
[11:20] <jcoxon> i'm nearly there
[11:20] <jcoxon> just fine tuning
[11:20] <rharrison> I'm going to write a miniapp for the iphone
[11:20] <rharrison> Nice one sir.
[11:20] <jcoxon> to actually make it display - its going into the mysql database just not beig displayed
[11:21] <rharrison> you seem to sail through these tasks very quickly jcoxon
[11:23] <jcoxon> nah i've been working on this for a week
[11:23] <rharrison> Good I'm pleased to hear it. Feeling quite inadiquate :-P
[11:24] Action: gordonjcp is fiddling with sstv
[11:24] <rharrison> gordonjcp: is that on the gumstix
[11:24] <gordonjcp> no, on a PC
[11:24] <gordonjcp> although it should be able to be ported
[11:25] <gordonjcp> basically I'm wading through qsstv and trying to make it not suck
[11:25] <rharrison> Cool
[11:25] <jcoxon> oh gordonjcp we've made some progress on that
[11:25] <rharrison> Big task by the sound of it
[11:25] <gordonjcp> ideally parting out a simple command-line TX and RX
[11:25] <jcoxon> though its only command line
[11:25] <gordonjcp> jcoxon: oh cool
[11:26] Action: gordonjcp is quite keen to try some of the faster ROBOT modes
[11:26] <jcoxon> fair enough
[11:26] <jcoxon> rocketboy has got some nice code
[11:26] <jcoxon> does fm and ssb sstv
[11:26] <gordonjcp> yeah, I've seen it
[11:26] <gordonjcp> well, I've seen the one you flew a month or so ago
[11:26] <jcoxon> its been improved
[11:27] <jcoxon> a lot quicker and better quality
[11:28] <jcoxon> he'll be back later - i'm sure he can send you a copy
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[11:33] <gordonjcp> yeah, that would be good
[11:38] <jcoxon> rharrison, you've got some experience with the Ajax tracker?
[11:43] <rharrison> back
[11:44] <rharrison> Yep what do you want to know
[11:44] <rharrison> He says confidently
[11:44] <jcoxon> oh wait - might have fixed it
[11:45] <rharrison> I have modified it now to switch video on and off
[11:45] <jcoxon> hmmm perhaps not
[11:45] <jcoxon> what would i need to do to change it from GET to POST?
[11:46] <rharrison> Use $_POST to access the vars
[11:46] <rharrison> instest of $_GET
[11:46] <jcoxon> yeah i've done hat
[11:46] <jcoxon> that*
[11:46] <rharrison> If you post and print_r ($_POST) should get all the post info
[11:46] <jcoxon> its going into the database
[11:46] <rharrison> What's going wrong?
[11:46] <jcoxon> just not displaying
[11:47] <rharrison> Humm and the data is in the db
[11:47] <jcoxon> yeah
[11:49] <rharrison> which server are you usong
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[15:14] <rharrison> Hi guys I have some blue insulation board and I'm wondering what people have use to cut it
[15:15] <rharrison> any input out there?
[15:15] <rharrison> Saw, knife, hot wire?
[15:56] <SpeedEvil> a fine knife
[15:56] <SpeedEvil> thin-bladed carving-knife if you have such
[15:56] <SpeedEvil> Hot-wire works well.
[15:57] <SpeedEvil> Saw works fine too - but leaves a rough edge
[16:14] <rharrison> I will go in search. Thanks SpeedEvil
[16:15] <SpeedEvil> Spray-bottle of water is good.
[16:15] <SpeedEvil> Otherwise the dust goes everywhere.
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[17:59] <edmoore> afternoon everyone
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[18:17] <Hiena> Well, well, well... Looks like i have a winner configuration for the solarballoon.
[18:19] <Hiena> Now, i have to get a 36 trashbag, and a lot of brown tape.
[18:20] <SpeedEvil> :)
[18:21] <edmoore> wow!
[18:22] <Hiena> 4 meter diameter, 45 sq. meter surface, and 29 qubic meter volume.
[18:22] <Hiena> And at the top 2.2 kg netto lift. ;)
[18:27] <Hiena> Btw, i found a great page for the balloon design.
[18:27] <Hiena> It has a temperature/density table.
[18:28] <SpeedEvil> http://img.4chan.org/b/src/1223054858775.jpg
[18:28] <SpeedEvil> oops
[18:29] <SpeedEvil> (but worksafe)
[18:35] <natrium42> haha, SpeedEvil
[18:35] <natrium42> now i want bacon :(
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[18:39] <natrium42> alexei@tritium:~$ make bacon
[18:39] <natrium42> make: *** No rule to make target `bacon'. Stop.
[18:39] <natrium42> :(
[18:39] <Hiena> sudo make bacon
[18:40] <natrium42> hehe
[18:40] <natrium42> OK
[18:42] <Hiena> Hmm, If my calculation is good i need only 30 celsius degree delta T to make flying this contraption.
[18:43] <SpeedEvil> yeah - I worked that out too.
[18:43] <SpeedEvil> It's not that bad.
[18:43] <Hiena> Which means it will be under the melting point at the 30 celsius outer temperature.
[18:44] <SpeedEvil> I was considering a electrically heated balloon on a fine wire.
[18:44] <Hiena> Heatsource is no problem, i have a gas burner from my previous car.
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[19:36] <EI5GTB__> hi guys, maybe you han help me write a reply to a letter
[19:37] <EI5GTB__> i e-mail our unmanned aircraft guy at the iaa
[19:37] <EI5GTB__> and ask him about launching baloons
[19:37] <EI5GTB__> and he than asks about the size, and the intended experiments
[19:37] <EI5GTB__> and so far i have managed to keep up with all his questions
[19:37] <EI5GTB__> but now
[19:38] <EI5GTB__> http://ei5gtb.pastebin.com/m275272a6
[19:39] <EI5GTB__> i mean, all that is way too far for a simple bloody baloon launch
[19:39] <SpeedEvil> up!
[19:40] <SpeedEvil> round!
[19:40] <EI5GTB__> lol
[19:41] <EI5GTB__> the baloon will be clearly marked with a white difusion reflection coating
[19:42] <EI5GTB__> i cant get permission from comreg unless i get permission from iaa
[19:42] <EI5GTB__> grr
[19:46] <SpeedEvil> Point at other places you can find balloon launch regulations for.
[19:47] <EI5GTB__> yea
[19:48] <EI5GTB__> i relaly cant be botherd writing a "striking" reply tho..
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[20:39] <rharrison> Evening all
[20:39] <rharrison> Right I need some help here
[20:40] <rharrison> Tried cutting up 50mm blue foam board and it is clearly not going to plan
[20:40] <rharrison> Wet knife does not produce nice perpendicular cuts
[20:40] <rharrison> Thinking now circular saw
[20:43] <SpeedEvil> Do it somewhere you don't care about dust.
[20:43] <rharrison> Yep I redecorated the garage with the circualr saw
[20:44] <rharrison> Need a table one really
[20:46] <SpeedEvil> A fretsaw works well too.
[20:55] Action: SpeedEvil ponders laser-cutter.
[21:01] <natrium42> rharrison, do you have any nichrome wire?
[21:01] <rharrison> I do
[21:01] <rharrison> I brought some today and connected it to a 12 1am transformer
[21:01] <natrium42> could build a hot wire cutter
[21:02] <natrium42> ah ncie
[21:02] <rharrison> Spectacular glow
[21:02] <natrium42> *nice
[21:02] <SpeedEvil> If it's glowing, it's prolly too hot
[21:02] <natrium42> haha, sounds too hot
[21:02] <rharrison> Oh yess
[21:02] <rharrison> yes*
[21:02] <natrium42> add a dimmer
[21:02] <SpeedEvil> The strength plummets when it glows.
[21:02] <natrium42> i just used a standard house dimmer you can build into a wall
[21:03] <rharrison> It broke into 2 just before the plastic plug melted where I had shoved the wire into the positive
[21:03] <natrium42> http://www.instructables.com/id/Hot-wire-foam-cutter/
[21:08] <rharrison> Did you get nice perpendicular cuts so that the walls a straight
[21:08] <rharrison> a = are
[21:09] <natrium42> yes, i usually cut the shape out of cardboard twice
[21:09] <natrium42> and put it on both sides using tape
[21:09] <rharrison> Humm
[21:09] <natrium42> then you can just lead the wire easily
[21:09] <SpeedEvil> Don't push too hard.
[21:10] <rharrison> Sounds like a plan
[21:10] <SpeedEvil> Then it tends to stay linear.
[21:10] <SpeedEvil> Oh!
[21:10] Action: SpeedEvil realises he has relevant pics.
[21:10] <SpeedEvil> http://www.mauve.plus.com/Chinese-Lantern.jpg
[21:11] <SpeedEvil> The lower part was cast in one bit.
[21:11] <SpeedEvil> Made foam block by laminating several layers of 10cm polystyrene.
[21:11] <rharrison> wow
[21:11] <rharrison> Looks like stone
[21:12] <SpeedEvil> Cut 'U' shapes in base from both sides (x and y)
[21:13] <SpeedEvil> trimmed off rest, then dissasembled block, and removed the bits to be filled.
[21:13] <SpeedEvil> Reassembled, and poured concrete in, then machined it a bit once set to make the legs not square form.
[21:14] <rharrison> Right I'm going to try again
[21:14] <SpeedEvil> Hot-wire cutter was a car battery, and a 1mm steel wire.
[21:15] <SpeedEvil> Bit of ply on floor, and other end hooked up to eye in ceiling.
[21:20] <rharrison> Had a break through
[21:20] <rharrison> Constructing a hot wire cutter now
[21:20] <rharrison> With dimmer switch. Good call buys
[21:20] <rharrison> guys
[21:21] <SpeedEvil> dimmer switch + transformer?
[21:21] <natrium42> i should make a cutter like that --> http://www.archinect.com/schoolblog/entry.php?id=28063_0_39_0_C
[21:22] <rharrison> yep
[21:22] <natrium42> atm i have one that looks like that instructable
[21:22] <SpeedEvil> that can cause explosions - not all dimmers play well with transformers.
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[21:58] <rharrison> Nearly there
[21:59] <rharrison> Does resistance wire get alot hotter than copper wire
[21:59] <rharrison> Wondering how the wire from the transformer will cope
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[22:06] <SpeedEvil> yes
[22:06] <SpeedEvil> it's got several hundred times the resistance of copper.
[22:06] <rharrison> So the tf wire will stay cool whist my resitance wire gets hot :)
[22:06] <rharrison> whilst*
[22:16] <rharrison> I have a 10k potentiometer to use
[22:22] <SpeedEvil> 10k will do nothing.
[22:22] <SpeedEvil> Well - smoke and burn out when you turn it right down.
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[22:57] <Laurenceb_> hello
[22:59] <SpeedEvil> Hellow.
[23:00] <Laurenceb_> SpeedEvil: what tools do you use for STM32 work?
[23:01] <SpeedEvil> I haven't actually done that yet - I've been slowly trying to do the hardware first.
[23:01] <Laurenceb_> ah ok
[23:02] <Laurenceb_> http://armadilloaerospace.com/n.x/Armadillo/Home/News?news_id=361 <-- v interesting
[23:03] <rharrison> Hey SpeedEvil your so right
[23:03] <SpeedEvil> Fun.
[23:03] <SpeedEvil> About?
[23:03] <rharrison> The smoke and my pot
[23:03] <SpeedEvil> ah
[23:03] <SpeedEvil> :/
[23:03] <rharrison> Should I try a dimmer switch
[23:04] <rharrison> Is this bad for the trans former?
[23:06] <rocketboy> wot mains -- dimmer --- transformer --- hot wire cutter?
[23:06] <SpeedEvil> It may work.
[23:06] <SpeedEvil> It may blow fuses or the dimmer.
[23:07] <SpeedEvil> The problem is that transformers hate DC components in the output, and the dimmer may with several designs of dimmer cause a DC component across the line, and make the transformer act as an effective short.
[23:07] <SpeedEvil> Connecting in series with a bulb that is the maximum wattage the dimmer can handle should make it safe.
[23:08] <rocketboy> i have seen it done - but its not somthing i would use
[23:09] <rharrison> Can I battery power for safty?
[23:09] <SpeedEvil> car battery will work well
[23:10] <rocketboy> well you will need somthing that can delivera few amps
[23:11] <rocketboy> a car battery is quite a high v for the nicrome wire
[23:11] <rocketboy> - i made one like this http://wiki.ukhas.org.uk/guides:hot_wire_cutter?s=hot%20wire
[23:11] <rocketboy> (one I made earlier)
[23:12] <rharrison> 400amps
[23:12] <rharrison> car battery power pack
[23:12] <rharrison> gulp
[23:12] <SpeedEvil> You may need to use quite a lot.
[23:12] <SpeedEvil> of resistance wire that is - if you do use 12V
[23:13] <rocketboy> i should think a couple of nicads would be good
[23:14] <natrium42> dimmer works fine for me :P
[23:14] <rocketboy> 2.5V
[23:14] <SpeedEvil> rocketboy: 10-20A battery connections are not really trivial
[23:15] <natrium42> mains -- dimmer -- transformer -- wire
[23:16] <natrium42> same as http://www.instructables.com/id/E2M2JN2GF6EP286SA6/
[23:16] <natrium42> YMMV
[23:17] <rocketboy> SpeedEvil: 10A - 20A for what
[23:17] <rocketboy> ?
[23:17] <SpeedEvil> rocketboy: resistance wire
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[23:18] <rocketboy> I don't think I got to any more than about 3A
[23:18] <rharrison> Ok were in busness found an old 9v roberts radio battery
[23:18] <rharrison> Seems to heat the wire beatutifully
[23:18] <rharrison> Does this sound good
[23:19] <SpeedEvil> rocketboy: possibly - I was thinking thick wire - like I used.
[23:19] <rharrison> Will I live :)
[23:19] <SpeedEvil> Worst case it'll kill the battery
[23:19] Action: Laurenceb_ has some 10ohm/meter wire
[23:19] <rocketboy> The wite I used was about 25 guage
[23:19] <Laurenceb_> what current do I need?
[23:19] <Laurenceb_> for cutting foam
[23:20] <rocketboy> about 3A
[23:20] <rocketboy> so 1.5 ohm for 150mm
[23:21] <rocketboy> 2V = 3A
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[23:32] <rharrison> Back to transformer
[23:32] <Laurenceb_> ok thanks
[23:32] <Laurenceb_> right
[23:32] <Laurenceb_> I've been investigating my avr bootloader
[23:32] <rharrison> Seems to be ok with pot. removed
[23:33] <Laurenceb_> appears if you flash a blank chip the bootloader will work fine
[23:33] <rharrison> Transformer smells a bit but no smoke
[23:33] <Laurenceb_> but if you then try to run the bootloader it fails
[23:34] <Laurenceb_> verify error if you give reset it with the reset pin, or wrong device code if you let the watchdog timer reset it
[23:34] <Laurenceb_> I'm unable to explain it at all :(
[23:34] <fuzzylugnuts> smoke and mirrors *nod*
[23:35] <fuzzylugnuts> sorry, too much intelligent conversation going on, had to offset :P
[23:38] <Laurenceb_> this is sooo annoying as I cant get any more work done until this is resolved
[23:41] <Laurenceb_> if this goes on I'll forget it and stick an olimex arm7 board on it
[23:45] <natrium42> fuzzylugnuts, http://crap.fi/archive/5861.jpg
[23:45] <Laurenceb_> crap.fi ? :P
[23:46] <Laurenceb_> nice url
[23:47] <fuzzylugnuts> natrium42: thanks : )
[23:47] <natrium42> :)
[23:48] <rocketboy> nights
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[23:49] <Laurenceb_> hmm seems to be working now
[23:49] <Laurenceb_> I tried version 2.1 of fastboot
[23:50] <Laurenceb_> very odd... it appears at least some of the problem could be switch bounce on the reset button
[23:50] jcoxon (n=jcoxon@host86-148-58-20.range86-148.btcentralplus.com) joined #highaltitude.
[23:51] <Laurenceb_> if I violently hammer the button it still gives the device id error - looks like maybe the auto bauding or something is messed up
[23:51] <Laurenceb_> but odd that that should happen - unless the noise on /reset doesnt properly reset the uC, just buggers up some registers
[23:52] Hiena (n=Hiena@81.93.195.181.datatrans.hu) left irc: "-=Halt! Hammerzeit!=-"
[00:00] --- Sat Oct 4 2008