highaltitude.log.20110515

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[00:06] <Lunar_Lander> so
[00:06] <Lunar_Lander> in a honour to the ESC winners
[00:06] <Lunar_Lander> http://habhub.org/predict/#!/uuid=fdfd53f6c07114c582053a87a391100afaaf27bd
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[00:29] Action: SpeedEvil wonders about thin shell yielding failure on drums.
[00:29] Action: SpeedEvil is idly wondering if you can externally reinforce a steel drum, and then evacuate it.
[00:30] <Lunar_Lander> hmm
[00:30] <Lunar_Lander> so that it won't implode?
[00:30] <SpeedEvil> yes.
[00:30] <Lunar_Lander> welding on a ring
[00:30] <Lunar_Lander> or so :S
[00:30] <SpeedEvil> Something like that, yes.
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[01:16] <Lunar_Lander> good night!
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[02:09] <SpeedEvil> natrium42: ping
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[05:16] <griffonbot> Received email: Mlow "[UKHAS] Re: My 1st HAB launch in Ireland."
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[06:38] <griffonbot> @KB1LQC: @N0SSC NP. Hey BTW check out the RITCHIE-1 #hamr #arhab build video http://bit.ly/jeK4wz I'm in orange RIT T-shirt fyi haha fun times [http://twitter.com/KB1LQC/status/69652902247006208]
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[08:43] m1x10 (m1x10@ppp046177151094.dsl.hol.gr) joined #highaltitude.
[09:05] <m1x10> Hi all !
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[09:21] <natrium42> eroomde: ping
[09:21] <eroomde> yo natrium42
[09:22] <natrium42> so, are you in cam?
[09:22] <eroomde> yes, I am
[09:22] <natrium42> how do i get there and how long does it take?
[09:22] <eroomde> 40 minuite direct train from king's cross station
[09:23] <natrium42> what's the target station?
[09:23] <eroomde> king's cross is a big station on the victoria, norhtern, picadilly, circle, bakerloo and metrolpolitan lines
[09:23] <eroomde> cambridge station
[09:23] <natrium42> ah, ok
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[09:23] <natrium42> sounds easy
[09:23] <eroomde> let me just check that there aren't engineering works today - sometimes they do repairs on a sunday which makes it not direct
[09:24] <natrium42> k
[09:24] <natrium42> where did jcoxon go? :S
[09:24] <eroomde> he was in cam yesterday
[09:24] <eroomde> i'll give him a call
[09:24] <natrium42> i smsd him, but got no reply
[09:24] <eroomde> ah ok, so there are engineering works today
[09:25] <eroomde> it goes kings cross -> royston, then a bus replacement service from royston -> cambridge
[09:25] <eroomde> it meas the journey will be 1.5 hrs
[09:25] <Randomskk> oh wow, that's an annoying one
[09:26] <eroomde> however,the bus replacement is not like 'ok, try and get a bus, good luck', they actually have dedicated buses and staff directing you from royston platform to the bus
[09:26] <eroomde> which then carries on direct to cambridge
[09:26] <natrium42> ah, k
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[09:27] <eroomde> wow
[09:27] <jcoxon> natrium42, you called?
[09:27] <eroomde> it's like ringing a bell in a country house
[09:27] <natrium42> jcoxon: yeah, so are you in london or in cam?
[09:27] <jcoxon> i'm in neither right now but will be in london from 12
[09:27] <mattltm> Is anyone launching today?
[09:27] <jcoxon> and will be london all evening
[09:28] <natrium42> hrm... so how do we schedule things
[09:28] <natrium42> cam looks like a whole day trip
[09:28] <jcoxon> natrium42, yeah it is
[09:28] <eroomde> it's thereateneing to rain too :(
[09:28] <eroomde> no punting :(
[09:28] <jcoxon> eroomde, what a shame :-p
[09:29] <jcoxon> natrium42, when do you leave?
[09:29] <eroomde> i could come to london this eve praps
[09:30] <jcoxon> mattltm, not to my knowledge
[09:30] <natrium42> jcoxon: would you be available in the evening?
[09:30] <natrium42> i would like to see cam
[09:30] <jcoxon> yes
[09:30] <jcoxon> i'm cetainly free
[09:30] <jcoxon> natrium42, how about you go to cam now
[09:31] <jcoxon> then when you get back in the evening we can meet up
[09:31] <natrium42> yeah, what i am thinking
[09:31] <jcoxon> you could even bring eroomde with you
[09:31] <natrium42> :D
[09:31] <natrium42> is he portable?
[09:31] <eroomde> i'm keen
[09:31] <jcoxon> eroomde, you can crash at my flat if you want - i'm getting it back today
[09:31] <eroomde> i have a car - could drive
[09:31] <jcoxon> tennents are moving out
[09:31] <eroomde> ah ok
[09:31] <eroomde> can i park anywhere near you?
[09:31] <jcoxon> hence why i need to be in london
[09:31] <jcoxon> yes
[09:31] <eroomde> ok cool, we could try that
[09:32] <eroomde> that would save making natrium navigate the engineering works on the way back
[09:32] <jcoxon> se16 7au
[09:32] <jcoxon> parking outside
[09:32] <jcoxon> though need to be moved by 8am
[09:32] <eroomde> no problem - i'd leave at like 6
[09:32] <natrium42> eroomde: do i have your cell?
[09:33] <jcoxon> natrium42, i did text you back but your phone is crazy international
[09:33] <eroomde> no. but you can have my *mobile* if you want
[09:33] <eroomde> 07789933271
[09:33] <jcoxon> eek public channel!
[09:33] <eroomde> 00447789933271
[09:33] <eroomde> i don't mind
[09:33] <eroomde> i'm on all the notams anyway
[09:33] <natrium42> :D
[09:34] <jcoxon> okay cool
[09:34] <jcoxon> natrium42, go visit cam
[09:34] <eroomde> i'll see if fnoble fancies a pub lunch
[09:34] <jcoxon> then give me a call in the evening
[09:34] <eroomde> natrium42: yep, get yourself up here :)
[09:34] <natrium42> eroomde: i will dial you up, but don't pick up
[09:35] <natrium42> worked?
[09:35] <jcoxon> did you know that spot is still working
[09:35] <eroomde> got it
[09:35] <jcoxon> 6 days now
[09:36] <eroomde> natrium42: text me with what train you catch
[09:36] <eroomde> i will make sure i am at cam station to pick you up
[09:36] <Randomskk> jcoxon: did you recover it in the end, or is it still in the tree?
[09:36] <jcoxon> still in the tree
[09:36] <jcoxon> going back on weds
[09:36] <jcoxon> we didn't attempt on friday as steve wasn't free
[09:36] <jcoxon> its a 2 person job
[09:36] <natrium42> eroomde: alrighty, so what about that russian/german girl?
[09:36] <natrium42> :)
[09:36] <Randomskk> hah I can imagine
[09:37] <natrium42> jcoxon: will try to ring you up too, don't pick up
[09:37] <jcoxon> the more the merrier if anyone wants to help out
[09:37] <eroomde> natrium42: she has a paper deadline
[09:37] <eroomde> but we'll see :)
[09:37] <Randomskk> eroomde: I'm totally here as well
[09:37] <jcoxon> natrium42, yup
[09:37] <natrium42> :)
[09:37] <eroomde> Randomskk: cool
[09:37] <eroomde> pub lunch it is
[09:37] <jcoxon> okay i better leave as i need to get into london by about 12
[09:38] <natrium42> eroomde: tell her i am 100% russian, not from concentrate
[09:38] <natrium42> actually, that's a lie
[09:38] <jcoxon> OT perhaps?
[09:38] <Randomskk> jon's not in cambs today though
[09:38] <eroomde> she's one of the khazack germans
[09:38] <Randomskk> though he is coming back tonight via london... :P
[09:38] <jcoxon> eroomde, okay give me a shout with the evening plans
[09:38] <jcoxon> i'm quite flexible
[09:38] <eroomde> willdo
[09:38] <natrium42> ok, so bbl travel :)
[09:39] <jcoxon> bbl travel
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[09:39] <natrium42> see ya all
[09:39] <eroomde> see you in abit natrium42
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[09:59] <m1x10> I wonder if there is a way to talk to the canon camera (from a mcu) to send it manually commands to take pics..
[10:00] <staylo> m1x10: Which camera?
[10:01] <m1x10> i have the A480, but i can buy a more appropriate if its needed...
[10:02] <staylo> Check out CHDK, it allows the voltage detect on the USB port to be used as a shutter trigger (or software flag for internal scripts)
[10:02] <m1x10> hmm
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[10:08] <eroomde> m1x10: yes that's the way to do it
[10:08] <eroomde> they have even extrended that to a bit-banged serial port
[10:09] <m1x10> do u have some tutorial link ?
[10:11] <eroomde> it'll probably involve a bit of google research
[10:11] <eroomde> to get you started:
[10:13] <staylo> Ah, the bitbanged serial (controlled by PICAXE) was my work but I don't think anyone continued it.
[10:13] <eroomde> oh wow
[10:13] <eroomde> m1x10: talk to this guy!
[10:16] <NigelMoby> Moooooo
[10:16] <NigelMoby> Rning
[10:20] <staylo> Found it: http://chdk.setepontos.com/index.php?topic=1568.0 is the 'documentation' for the bitbanged serial. Pretty nasty though, I didn't know what I was doing (still don't) ;)
[10:20] <eroomde> staylo: do you think that, based on your experiments, the idea is a go-er though?
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[10:21] <eroomde> i.e. you can get basically control of whatever you want in the camera using serial?
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[10:26] <staylo> Yeah, from what I remember the main restriction was that there was no static time reference with enough resolution, and that my code was intensive enough that it slowed down the camera UI. (CHDK is hooking functions and IIRC there's no threading, so any processing time holds up the system) I guess my approach now would be to reduce the time it's actually monitoring the serial to the bare minimum and just have the host device blast it with continuo
[10:27] <staylo> If you're just trying to get the odd configuration change sent over it's entirely practical.
[10:28] <griffonbot> Received email: Mission Excelsior "Re: [UKHAS] Re: My 1st HAB launch in Ireland."
[10:29] <eroomde> staylo: yes, i think i would be interested in the latter
[10:29] <eroomde> eg zoom and take pgoto
[10:29] <eroomde> photo
[10:29] <eroomde> or switch to video and zoom out
[10:30] <staylo> Should be extremely practicable. I think someone found a way for programmatic video mode switching, but I'm not sure.
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[10:36] <m1x10> that is what i wish to do: http://www.zipfelmaus.com/blog/hack-a-canon-camera-and-controll-it-with-an-arduino/
[10:39] <staylo> m1x10: Nice and easy then, just use CHDK on the camera and wire the shutter trigger wires to a USB cable instead of to the camera's PCB :)
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[10:41] <m1x10> still cant find a tutorial on how to send commands through the usb
[10:42] <staylo> http://chdk.wikia.com/wiki/USB_Remote_Cable <- looks out of date though, there should be a 'USB remote trigger' option on the CHDK menu or similar which triggers the shutter without the need for a script.
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[10:46] <Lunar_Lander> hello
[10:48] <fsphil> I wonder if the Irish HAB guys have talked to the IAA yet
[10:48] <fsphil> hiya Lunar_Lander
[10:48] <Lunar_Lander> :)
[10:49] <Lunar_Lander> I read that Azerbajan did kick out most foreigners several years ago
[10:49] <Lunar_Lander> so another reason that it is a bad launch site
[10:50] <m1x10> hi Lunar_Lander
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[10:51] <Lunar_Lander> hello m1x10
[10:51] <Lunar_Lander> Hellas forever!
[10:51] <Lunar_Lander> :)
[10:53] <m1x10> omg !
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[10:54] <cuddykid> hi all
[10:54] <Lunar_Lander> hi cuddykid
[10:55] <Lunar_Lander> yes, Azerbajan did win the ESC
[10:55] <cuddykid> hi Lunar
[10:55] <cuddykid> unbelievable!
[10:55] <Lunar_Lander> a country which has almost no road labels on google maps
[10:55] <cuddykid> lol
[10:55] <Lunar_Lander> and is clamped between Russia and Iran
[10:55] <m1x10> staylo: the usb way requires many other components
[10:57] <Lunar_Lander> cuddykid m1x10 we determined yesterday that a HAB landing in Iran would surely be accounted for as an attack
[10:57] <staylo> m1x10: It's just using the voltage detect on the USB connector, so to trigger it all you need is a USB cable and a means of applying a voltage.
[10:58] <cuddykid> Lunar_Lander: haha!
[10:59] <griffonbot> Received email: Mlow "Re: [UKHAS] Re: My 1st HAB launch in Ireland."
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[11:29] <eroomde> Randomskk: ping
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[12:17] <Laurenceb> Randomskk: ping
[12:17] <Lunar_Lander> hi Laurenceb
[12:17] <Laurenceb> hi
[12:17] <Randomskk> Laurenceb: hi
[12:17] <Laurenceb> hi Randomskk
[12:17] <Laurenceb> im trying to understand stm32 clocks
[12:17] <Lunar_Lander> hi Randomskk
[12:18] <Laurenceb> have you used external xtal?
[12:18] <Randomskk> yea
[12:18] <Randomskk> on stm32 I assume
[12:18] <Laurenceb> yes
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[12:18] <Randomskk> yea. usually 8mhz but 25mhz one time too
[12:18] <Laurenceb> so i see the code in CMSIS_CM3
[12:18] <Laurenceb> yeah, i have a 12mhz xtal
[12:18] <Laurenceb> i see theres code assuming 8 or 25
[12:19] <Randomskk> yea
[12:19] <Randomskk> 8 seems very very common for almost everything
[12:19] <Randomskk> 25 for ethernet
[12:19] <Laurenceb> systeminit is called at reset
[12:19] <Laurenceb> but theres loads of sysclk defines
[12:19] <Laurenceb> where are those set?
[12:20] <Laurenceb> #ifdef SYSCLK_FREQ_HSE ect
[12:20] <Randomskk> lib/CMSIS/system_stm32f10x.c
[12:20] <Laurenceb> i see -DHSE_Value=$(HSE_VALUE) in the makefile
[12:21] <Laurenceb> thats the file im reading yes
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[12:23] <Randomskk> HSE_VALUE = 8000000L
[12:23] <Randomskk> in the makefile
[12:23] <Randomskk> at the top
[12:23] <Laurenceb> yeah i see that
[12:24] <Randomskk> set the crystal freq there, and the desired system clock freq in system_stm32f10x.c
[12:24] <Laurenceb> so what happens when system_init is called
[12:24] <Laurenceb> oh
[12:24] <Laurenceb> #define SYSCLK_FREQ_72MHz 72000000
[12:24] <Laurenceb> i see
[12:25] <Laurenceb> arg this is confusing - couldnt that be put in the makefile
[12:25] <Laurenceb> thats how i usually do it on avr
[12:26] <Randomskk> probably. the cmsis crap is annoying
[12:26] <Laurenceb> so, if i change HSE to 12MHz it should work?
[12:26] <Randomskk> yea, I guess so
[12:26] Action: Laurenceb reads the code
[12:26] <Laurenceb> pll needs to multiple by 6
[12:26] <Laurenceb> *multiply
[12:27] <Randomskk> https://github.com/adamgreig/followingrobot/blob/master/main.c#L592
[12:27] <Randomskk> it used to be a lot more annoying
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[12:27] <Randomskk> that was before cmsis
[12:27] <Laurenceb> ew
[12:27] <Laurenceb> :P
[12:28] <Randomskk> that code also has my epic inline ASM routine for image analysis
[12:28] <Laurenceb> nice work
[12:28] <Laurenceb> what sort of analysis?
[12:28] <Randomskk> very, very, very crude analysis
[12:28] <Randomskk> it identified the centre of thresholded-red mass
[12:29] <Laurenceb> ah
[12:29] <Randomskk> in other words it would find the centrepoint of a vivid red card
[12:29] <Randomskk> or the point in between two separated red cards
[12:29] <Randomskk> etc
[12:29] <Laurenceb> did you see my screenfinder code?
[12:29] <Randomskk> no blob detection or anything
[12:29] <Randomskk> yea, I think so, the one to read data from an lcd or something?
[12:29] <Laurenceb> edge detect from blue to black and radon
[12:29] <Laurenceb> yes
[12:29] <Randomskk> yes, I think that was somewhat more sophisticated
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[12:29] <Laurenceb> worked quite well
[12:29] <Randomskk> this one worked great for what it needed to do
[12:30] <Randomskk> I was somewhat constrained by how I couldn't store an image in memory (not enough ram) so had to analyse it line by line
[12:30] Nick change: n -> Guest13763
[12:30] <Laurenceb> robot follows cards?
[12:30] <Randomskk> and analyse each line before the next came in
[12:30] <Randomskk> http://www.youtube.com/watch?v=zb17uQtSYWk
[12:31] <Randomskk> crappy video quality and annoying annotations but you get the idea
[12:31] <Lunar_Lander> oh man
[12:31] <Randomskk> skip to about 30 seconds to get past annotations
[12:31] <Lunar_Lander> I passed my Math Exam
[12:31] <Laurenceb> impressive, did you make the enclosure as well?
[12:32] <Randomskk> yea
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[12:32] <Randomskk> though it was just a piece of cut sheet ally that I folded and bolted together
[12:32] <Randomskk> 1.15 is the actual driving/following test
[12:32] <Randomskk> 1.43 is a slightly better one
[12:33] <Laurenceb> RCC->CFGR2 &= (uint32_t)~(RCC_CFGR2_PREDIV2 | RCC_CFGR2_PLL2MUL |
[12:33] <Laurenceb> RCC_CFGR2_PREDIV1 | RCC_CFGR2_PREDIV1SRC);
[12:34] <Laurenceb> this seems to be hard coded
[12:34] <Randomskk> no reason not to modify the cmsis stuff as appropriate
[12:34] <Randomskk> why'd you go for 12mhz, out of interest?
[12:34] <Laurenceb> what is STM32F10X_CL ?
[12:35] <Randomskk> it's one of the stm32 lines
[12:35] <Randomskk> connectivity line I think
[12:35] <Laurenceb> smaller xtals avaliable for some reason
[12:35] <Randomskk> the f107s I think
[12:35] <Laurenceb> ah i see
[12:35] <Laurenceb> 3.2x2mm is avaliable in 12mhz but not 8 iirc
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[12:36] <Randomskk> curious
[12:36] <Randomskk> oh well, it should work fine
[12:36] <Randomskk> bbl, I'm off for lunch with eroomde and natrium42 :P
[12:37] <Laurenceb> natrium42 is in the UK?
[12:37] <Laurenceb> cool
[12:37] <Laurenceb> cya
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[13:01] <Lunar_Lander> Laurenceb he is in CDN I think
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[13:05] <SpeedEvil> http://images.4chan.org/b/src/1305463695361.jpg - neat.
[13:05] <SpeedEvil> (entirely worksafe)
[13:05] <SpeedEvil> A somewhat unusual sink.
[13:06] <BrainDamage> dx's waterfall faucet would fit pretty well
[13:07] <SpeedEvil> Indeed.
[13:07] <mattltm> Cleaning it out will be a b***h!
[13:07] <SpeedEvil> Depends if it has a second, concealed plughole. :)
[13:08] Action: Laurenceb fails to understand stm32 clock tree
[13:09] <Laurenceb> the usart seems to magically get the correct baud rate
[13:13] <Laurenceb> oh its in the st perif library
[13:14] <Laurenceb> RCC_GetClockFreq()
[13:14] <Laurenceb> weird
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[13:14] <Chingy> Hello all !
[13:18] <Laurenceb> ah RCC=realtime clock control.. which uses the xtal value defined in the makefile
[13:18] <Laurenceb> eeek this is all easy to break
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[13:20] <MNSP> hello all :)
[13:21] <MNSP> any suggestions as to what coax cable I should use in balloon payload?
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[13:23] <NigeyS> rg58 would do fine
[13:24] <MNSP> hiya nigeys, thanks
[13:24] <NigeyS> np :)
[13:25] <MNSP> and with groundplane, does it need to be radials or can I use say a piece of foil/thin metal plate on underside of payload work?
[13:25] <NigeyS> normally radials
[13:25] <NigeyS> 1/4 wave
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[13:26] <MNSP> sure
[13:26] <mattltm> A conductive plate would work well.
[13:26] <NigeyS> i think upu was gonna try that matt, with copper tape ...
[13:26] <MNSP> I got this stuff at the moment http://www.maplin.co.uk/miniature-coax-cable-269
[13:27] <mattltm> Not the best as it is 75ohm.
[13:27] <mattltm> Idealy you would want 50ohm for the best match.
[13:28] <MNSP> thats what I thought, I heard you guys talking about 50ohm before
[13:28] <MNSP> lol
[13:29] <mattltm> Im not saying 75ohm wont work. but 50ohms is the norm and is proven.
[13:29] <Lunar_Lander> hi NigeyS mattltm
[13:29] <NigeyS> hey Kev :)
[13:29] <Lunar_Lander> I just got my math result
[13:29] <Lunar_Lander> I passed w/ 190/220 pts
[13:30] <NigeyS> excellent, congrats
[13:30] <mattltm> congrats.
[13:30] <MNSP> nice one, well done :)
[13:31] <Lunar_Lander> thanks :)
[13:32] <Chingy> I'm looking for advice on on-board computers for a high altitude balloon, could anyone point me in the right direction ?
[13:33] <Lunar_Lander> arduino
[13:33] <MNSP> do you program?
[13:34] <Chingy> euh i did a small amount of programming (on PICs)
[13:34] <Chingy> before
[13:34] <MNSP> hmm prob stick with arduino like Lunar_Lander said then
[13:35] <SpeedEvil> PIC will work.
[13:35] <SpeedEvil> Or AVR
[13:35] <SpeedEvil> Or even the dumbed-down AVR that is arduino.
[13:35] <SpeedEvil> The 'computing' needed is truly minimal.
[13:35] <Chingy> ok
[13:36] <Chingy> thanks
[13:36] <SpeedEvil> Read GPS, extract some variables from the GPS output stream, massage them minimally. Write at 50bps serial to the transmitter.
[13:36] <SpeedEvil> In some cases, there may be otehr things to do - actuate cutdown actuators, or cameras, but it's not required.
[13:37] <Chingy> yeah, i'd also like to put some sensors on the balloon, and maybe one or two actuators (not so sure about that part though)
[13:37] <SpeedEvil> one-wire bus is an option, and r/c servos are also popular.
[13:39] <Chingy> ok
[13:39] <Chingy> will an arduyino be able to handle this ?
[13:39] <Chingy> arduino*
[13:40] <MNSP> pretty much, which board did you have in mind?
[13:41] <Chingy> well, i'm still trying to sort things out to be honest
[13:41] <MNSP> I have an uno and that is fine
[13:41] <Chingy> i just started looking into it and don't really know where and with what to start
[13:41] <Chingy> ok
[13:42] <MNSP> and I just programmed it a couple of weekends ago to do gps through to transmitter... and I have no programming
[13:42] <Chingy> :)
[13:43] <Chingy> that sounds good ^^
[13:44] <Chingy> i'm also worried about the interfacing with the GPS and comms : i don't really have the tools to build my own electronics cards or such
[13:44] <Chingy> do you know if there are any parts that are really easy to interface together (physically I mean)
[13:45] <MNSP> errm I have a soldering iron and brought the bits required... am going to put it all on stripboard
[13:45] <SpeedEvil> veroboard works fine.
[13:45] <Chingy> like al;ost plug-and-play would be perfect ^^
[13:45] <Chingy> for the comms and GPS
[13:46] <Chingy> ok ok
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[13:47] <Chingy> i think i'd be able to work zith that
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[13:47] <Chingy> thanks for the advice :)
[13:48] <MNSP> right time for me to go get some coax :) see you all later. good luck Chingy, welcome aboard
[13:48] <Chingy> thanks !
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[13:57] <cuddykid> Chingy, I had very little electronics and programming knowledge however have managed to get a working tracker!
[13:57] <cuddykid> I'm using arduino, ntx2 and lassen iq
[13:57] <cuddykid> all joined together with some messy soldering lol
[14:01] <Chingy> ok
[14:01] <Chingy> noting everything down ^^
[14:04] <cuddykid> yeah, when I started I just saved the chats on here to computer!
[14:04] <cuddykid> theres a HUGE amount of really useful info on the wiki which helped me
[14:05] <Chingy> yes there is
[14:05] <Chingy> but still, it's sometimes hard to know what to start with !
[14:06] <Chingy> are the ntx2 and lassen iq expensive ?
[14:07] <NigeyS> ntx2 .. about £20 .. lassen .. think its about 35 / 40 ish
[14:08] <Chingy> ok, that doesn't sound too expensive
[14:08] <Lunar_Lander> I was told the Lassen is too difficult for beginners
[14:09] <NigeyS> i wouldnt say difficult, its lack of sensitivity can be frustrating
[14:11] <Lunar_Lander> yeah
[14:11] <Lunar_Lander> but you need SMD soldering or so?
[14:14] <NigeyS> nah, you can get a cable without the need to solder the tiny connector
[14:15] <Lunar_Lander> YAY!
[14:19] <Chingy> sounds like you had a painful experience with SMD soldering Lunar_Lander
[14:19] <Lunar_Lander> no
[14:19] <Lunar_Lander> I just never did it before
[14:21] <Chingy> ok
[14:24] <Chingy> well, thanks to all for your help and advice, see you
[14:24] <Chingy> ++
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[14:38] <SpeedEvil> http://cgi.ebay.co.uk/SOLAR-DEATH-RAY-COOKER-TV-DISH-MIRROR-FILM-KIT-/330534571557?pt=LH_DefaultDomain_0&hash=item4cf5654e25
[14:38] <SpeedEvil> _leeetle_ hyperbole.
[15:02] <cuddykid> that's pretty cool! "burn a hole through your head" lol
[15:02] <SpeedEvil> I'm sort-of-pondering getting 4m^2 of solar mirror film.
[15:03] <SpeedEvil> The decent stuff that will lsat outside for decades.
[15:03] <fsphil> they forgot "OF DOOM" in the description
[15:04] <Lunar_Lander> lol ye
[15:04] <Lunar_Lander> yea
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[15:10] <Lunar_Lander> damn
[15:10] <Lunar_Lander> storm front
[15:10] <Lunar_Lander> :S
[15:11] <fsphil> there's a few storms over germany atm
[15:12] <Lunar_Lander> yeah
[15:13] <m1x10> "High altitude return vehicle" omg
[15:13] <Lunar_Lander> where?
[15:14] <m1x10> http://ukhas.org.uk/frontpage:projects
[15:15] <m1x10> - Controlled payloads
[15:15] <fsphil> well they're all return vehicles to some degree
[15:15] <m1x10> Lunar_Lander: next week i expect the new pcb boards
[15:16] <Lunar_Lander> cool
[15:16] <m1x10> in blue color :p.. propably i will send you this one
[15:16] <Lunar_Lander> :) yay
[15:16] <m1x10> cause it fixes some bad problems
[15:17] <Lunar_Lander> the blue fixes problems?
[15:17] <Lunar_Lander> yeah
[15:17] <Lunar_Lander> I mean, Blue did not get last place in the ESC
[15:17] <Lunar_Lander> :D
[15:20] <m1x10> hehe
[15:20] <m1x10> i have 1 last month in army and im over
[15:20] <Lunar_Lander> yay
[15:21] <m1x10> i hope i find a job and make money to build the hab rapidly
[15:21] <m1x10> Lunar_Lander: http://slaros.blogspot.com/2011/05/testing-jpeg-ttl-camera.html
[15:23] <Lunar_Lander> yeah
[15:23] <Lunar_Lander> all will be good
[15:24] <Lunar_Lander> the battle for Cyprus will be settled
[15:24] <Lunar_Lander> and all the other problems in europe will stop
[15:24] <Lunar_Lander> :)
[15:25] <Lunar_Lander> btw m1x10
[15:25] <Lunar_Lander> I read a funny comment on Azerbajan
[15:25] <Lunar_Lander> "And now, ESC 2012 live from a metal hut!"
[15:25] <m1x10> what is ESC?
[15:26] <Lunar_Lander> eurovision song contest
[15:28] <Lunar_Lander> COOL
[15:28] <Lunar_Lander> m1x10 the data in the "COM6" window is the image?
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[15:33] <m1x10> yes
[15:33] <m1x10> raw jpeg bytes :)
[15:35] <Lunar_Lander> cool!
[15:38] <russss> NASA has realtime Google Earth tracking of the Shuttle now: http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/shuttle_google_earth.html
[15:38] <Lunar_Lander> xD
[15:39] <Lunar_Lander> a new feature for the last two flights
[15:39] <russss> yeah, they really seem to have got their public outreach act together now :/
[15:40] <Lunar_Lander> they could do the following for STS-135
[15:40] <Lunar_Lander> get the people down in Soyuzes
[15:40] <Lunar_Lander> and show that STS can land automatically
[15:40] <Lunar_Lander> that would be a nice grand final
[15:40] <russss> hah yeah
[15:46] <russss> Lunar_Lander: oh, they actually have that capability.
[15:46] <russss> http://en.wikipedia.org/wiki/STS-335#Remote_Control_Orbiter
[15:48] <Lunar_Lander> yeah I know
[15:48] <russss> just when I think I've learned everything about this stupid spacecraft some other random thing comes up :)
[15:48] <Lunar_Lander> strange that all it takes to convert the final approach from manual to auto is a simple cable
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[17:44] <Laurenceb> Randomskk:ping
[17:44] <Laurenceb> http://pastebin.com/1L4idYT5
[17:44] <Laurenceb> im trying to get usart working :S
[17:56] <Laurenceb> nvm i had to add #include "stm32f10x_usart.h" to usart.h
[17:56] <Laurenceb> slightly odd
[17:56] <Laurenceb> no need to add the gpio header to main
[18:02] <Lunar_Lander> damn
[18:02] <Lunar_Lander> what do you do with a reference that says nothing?
[18:03] <Lunar_Lander> "Ziegler and Sellers, Part I, Plenum Press, New York"
[18:03] <Lunar_Lander> what kind of a book is that supposed to be?!
[18:05] <Lunar_Lander> nevermind, found it
[18:11] <NigeyS> !stat laurenceb
[18:11] <HAMBotty> Laurenceb: 1538 words, 8964 letters, 2 smilies, time wasted: 1 day 12 hours 53 minutes .
[18:12] <Lunar_Lander> hi NigeyS
[18:12] <NigeyS> hey kev
[18:12] <Lunar_Lander> it was frustrating
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[18:13] <Lunar_Lander> researching the betasonde and finding a hint to an article on its origins
[18:13] <Lunar_Lander> and then
[18:13] <Lunar_Lander> the reference was to "Ziegler and Sellers, Part I, Plenum Press, New York (1966)"
[18:13] <NigeyS> ohh
[18:13] <Lunar_Lander> what the hell is the book part I?
[18:13] <Lunar_Lander> anyway
[18:14] <Lunar_Lander> the succeding article had it listed
[18:14] <Lunar_Lander> "Radioisotopes for Aerospace"
[18:14] <NigeyS> oh right
[18:14] <Laurenceb> time wasted ?!
[18:15] <Randomskk> I think it means total time connected?
[18:15] <Randomskk> bit useless if you're always on
[18:15] <Laurenceb> ah
[18:15] <Randomskk> !stat randomskk
[18:15] <HAMBotty> Randomskk: 1929 words, 10480 letters, 11 smilies, time wasted: 5 days 22 hours 35 minutes .
[18:15] <Laurenceb> heh
[18:15] <NigeyS> lol
[18:15] <Randomskk> !top10
[18:15] <HAMBotty> Top10(words): 1. eroomde(3061) 2. SpeedEvil(2454) 3. NigeyS(2423) 4. Randomskk(1930) 5. fsphil(1768) 6. Laurenceb(1543) 7. jcoxon(1262) 8. jonsowman(1159) 9. MNSP(916) 10. Laurenceb_(884)
[18:15] <Randomskk> the annoying thing about that
[18:15] <Randomskk> is that it highlights all the most active people
[18:15] <NigeyS> lol yup
[18:15] <Randomskk> could you have it like
[18:15] <NigeyS> i could set it as a notice
[18:15] <Randomskk> put a space in the middle of names
[18:16] <Randomskk> that would be better
[18:16] <NigeyS> kk give me 5
[18:16] <Laurenceb> Randomskk: any clue why i had to add that header?
[18:16] <Laurenceb> its rather odd
[18:16] <Randomskk> Laurenceb: you have to uncomment the includes in another file
[18:16] <LazyLeopard> Hmmm... How did yesterday's flights go? The tracks left on the tracker look reasonable...
[18:16] <Randomskk> there's a file, uhm
[18:17] <Randomskk> conf or something
[18:17] <Randomskk> with a lot of commented includes
[18:17] <Laurenceb> oh
[18:17] <Randomskk> and you uncomment the ones you need
[18:17] <Randomskk> so yea
[18:17] <Randomskk> lib/STM32F10x_StdPeriph_Driver/stm32f10x_conf.h
[18:17] <Randomskk> contains all the includes
[18:17] <Randomskk> and you uncomment the peripherals from the library you want included
[18:17] <Laurenceb> oh i kind of see
[18:17] <Laurenceb> thanks
[18:18] <Laurenceb> is rcc realtime clock control?
[18:18] <Randomskk> no
[18:18] <Randomskk> well maybe that's what it stands for
[18:18] <Randomskk> but it means all the clock stuff
[18:18] <Randomskk> not the rtc
[18:19] <Laurenceb> sure, thats not what i meant
[18:19] <Laurenceb> i meant clock faffery
[18:19] <Randomskk> yea, it's for clock faffery
[18:19] Action: Laurenceb is drawing a big A3 diagram of how this all works
[18:20] <Laurenceb> too freaking complicated to remeber
[18:20] <Randomskk> compare this to how easy AVRs are
[18:20] <Randomskk> then again in AVR you basically just write all the registers yourself
[18:20] <Laurenceb> yes, sudo-apt get the tools and find a makefile
[18:20] <Randomskk> you could do that here, of course :P
[18:20] <Randomskk> mainly I think the ST C library is crap
[18:21] <Randomskk> really good compared to any alternative, but
[18:21] <Randomskk> not great.
[18:21] <Laurenceb> theres some forum posts where they admit the lib doesnt work properly for i2c
[18:21] <Laurenceb> :S
[18:21] <Randomskk> I'm keeping a close eye on libopencm3 (ne
[18:21] <Randomskk> uh, previously known as libopenstm32
[18:22] <Laurenceb> yeah
[18:22] <Randomskk> I was trying to be clever and put a screen digraph in for née
[18:22] <Randomskk> pressed enter at the wrong time
[18:22] <Randomskk> née wouldn't even make sense though, so whatever
[18:22] <Randomskk> anyway the lib is a heck of a lot easier than trawling the datasheet and writing to like five hundred registers
[18:23] <Laurenceb> yeah
[18:23] <Laurenceb> thats how ive been using Xscale
[18:23] <Laurenceb> bad idea - code is a tip
[18:25] <Randomskk> yea
[18:25] <Randomskk> basically you either write your own HAL that handles registers
[18:25] <Randomskk> or use ST's or other
[18:26] <Randomskk> and that is directly a reinventing-the-wheel problem
[18:26] <Randomskk> libopenstm32 is promising but slow progress recently
[18:26] <Laurenceb> openpilot have their own code for lots of hardware
[18:27] <Laurenceb> but its built around the PiOS rtos
[18:27] <Randomskk> http://sourceforge.net/apps/mediawiki/libopenstm32/index.php?title=Status
[18:27] <Laurenceb> i want to avoid PiOS
[18:27] <Laurenceb> try and keep things reasonably simple
[18:28] <Laurenceb> no adc or dma :(
[18:29] <Randomskk> the ST lib has been surprisingly kind to me for ADC and DMA work
[18:29] <Randomskk> though in the end I did DMA via ASM which was painful
[18:29] <Randomskk> by painful I mean like
[18:29] <Randomskk> D:
[18:30] <Randomskk> https://github.com/adamgreig/followingrobot/blob/master/main.c#L492 it was that lump
[18:30] <Randomskk> basically a ton of ldr r0, some crappy address, some crappy value
[18:30] <Randomskk> then loading what I wanted to write to another register, then storing it in the address of the first.. ugh
[18:31] <Laurenceb> thats a pin change isr?
[18:31] <Laurenceb> ah i see the config
[18:32] <Randomskk> it was "read n bytes from this memory address and TX them over SPI"
[18:32] <Laurenceb> i see
[18:32] <Laurenceb> interrupts.c in your skeleton project, that doesnt have those isrs
[18:33] <Laurenceb> where are the interrupt sources declared?
[18:33] <Randomskk> see comment at top of interrupts.c
[18:34] <Randomskk> you can put any interrupt you want in interrupts.c and it'l use that one
[18:34] <Randomskk> or indeed put them anywhere, just the function name that matters
[18:34] <Randomskk> the possible function names are in lib/CMSIS_CM3/startup/gcc/stm32f10x_*.s
[18:34] <Laurenceb> aha i see now
[18:34] <Laurenceb> thanks
[18:34] <Randomskk> where * is cl, hd, ld, md depending on your device
[18:35] <Laurenceb> actually i can see interrupt handlers in my .map file
[18:35] <Randomskk> https://github.com/adamgreig/STM32_SkeletonProject/blob/master/lib/CMSIS_CM3/startup/gcc/startup_stm32f10x_ld.s#L122 for instance
[18:35] <Laurenceb> presumably there has to be something there whatever
[18:35] <Randomskk> don't think so? that .s file gives a memory map of where to put pointers to functions but
[18:35] <Randomskk> basically if there's no function it doesn't matter unless you also configure that interrupt as it'l never go to that address anyway
[18:36] <Randomskk> if you have an interrupt fire and no handler, that's bad
[18:36] <Laurenceb> 0x0800116c RTC_IRQHandler
[18:36] <Randomskk> which is why interrupts.c has all the required ones
[18:36] <Laurenceb> etc in my map file
[18:36] <Randomskk> anything extra will only fire if you configure it, so no need for default code
[18:36] <Randomskk> yea, but at that memory address is just the pointer to the start of the function, I think
[18:36] <Laurenceb> yeah thats what it looks like to me
[18:37] <Laurenceb> so the addresses in the map file are in bytes?
[18:37] <Laurenceb> so 0x08001180 = ~4KB used
[18:38] <Laurenceb> aha the .bin is that size too - guess thats the simple way to see how big the code is
[18:40] <Randomskk> yea I always just checked the .bin
[18:40] <Randomskk> sometimes when things went wrong it got to be 500MB big
[18:40] <Randomskk> (0x08000000)
[18:40] <Randomskk> all 0s
[18:40] <Randomskk> very annoying
[18:42] <Laurenceb> oops
[18:43] <Laurenceb> is it ok to call gpioinit twice on the same port?
[18:43] <Randomskk> yea
[18:43] <Laurenceb> once to setup gpio pins and once for usart on the same port
[18:43] <Randomskk> you could deinit if you want
[18:43] <Laurenceb> cool
[18:43] <Randomskk> but I don't think you need to
[18:43] <Laurenceb> i like the way peripherals go through the gpio
[18:43] <Laurenceb> much more sane than avr
[18:44] <Randomskk> it is
[18:44] <Laurenceb> there was actually a way to hang atmega by setting up the spi incorrectly
[18:45] <m1x10> :p
[18:45] <Laurenceb> iirc it started generating continuous interrupts
[18:45] <Lunar_Lander> but as I said yesterday
[18:45] <Lunar_Lander> my professor thinks that the amount of radioactive material onboard should be kept low
[18:45] <Laurenceb> lmao
[18:46] <Laurenceb> Randomskk: did you ever find a way to create stdout?
[18:46] <Randomskk> uhm kind of
[18:47] <Lunar_Lander> my slovenian friend yesterday said
[18:47] <Randomskk> basically you don't create stdout but you make your own function for putchar or something which is otherwise a stub
[18:47] <Randomskk> and printf etc all call putchr or whatever it's called
[18:47] <griffonbot> Received email: Keith Lovern "Re: [UKHAS] Re: Information Please"
[18:47] <Randomskk> and so you rig it to write to the serial port or similar
[18:47] <Lunar_Lander> (01:24:47)<Lunar_Lander>the professor who gives me the helium told me that we should try to keep the amount of radioactive material onboard to a minimum
[18:47] <Lunar_Lander> (01:25:40)<RisingFury>Radioactive?!
[18:47] <Lunar_Lander> (01:25:48)<RisingFury>Are you trying to start a nuclear war?
[18:47] <Lunar_Lander> (01:25:50)<Lunar_Lander>no
[18:47] <Lunar_Lander> (01:25:52)<Lunar_Lander>wait
[18:47] <Randomskk> but that also requires newlib or libc or something for proper printf
[18:47] <Randomskk> and it's a total mess and massive and adds huge amounts of junk to your source
[18:48] <Laurenceb> yeah
[18:48] <Randomskk> so I never bothered
[18:48] <Randomskk> I did get newlib/libc working
[18:49] <Randomskk> but just used sprintf to make strings and then put them to the uart in userspace, as it were
[18:49] <Laurenceb> i though it was used for floating point?
[18:49] <Randomskk> rather than overwriting putchr
[18:49] <Laurenceb> -newlib
[18:49] <Randomskk> maybe?
[18:49] <Randomskk> there's libm too
[18:49] <Randomskk> I think newlib does a lot of things?
[18:49] <Randomskk> stupid name
[18:49] <Laurenceb> i dont know
[18:50] <Laurenceb> avr-gcc has a macro to creating stdout/io
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[18:59] <Laurenceb> http://cgi.ebay.co.uk/USB-2-0-UART-TTL-6-Pin-Module-Converter-CP2102-/270748860792?pt=UK_Computing_CablesConnectors_RL&hash=item3f09e3c178
[18:59] <Laurenceb> ^neat
[19:00] <Laurenceb> nice thing about the cp2102 is it can be powered from a 3.3v device without risk of frying anything
[19:01] <Lunar_Lander> "Hi all,
[19:01] <Lunar_Lander> Ed, thanks for you response...we are guessing it's going to be
[19:01] <Lunar_Lander> 'huge'...thousands!...which is kind of way more than we were expecting. What
[19:01] <Lunar_Lander> figures have you seen in the past?
[19:01] <Lunar_Lander> If anyone has gained insurance before, do you have a copy of the cover note
[19:01] <Lunar_Lander> we could see or at least share the details..
[19:01] <Lunar_Lander> Hate to continue this thread, but without insurance.... we will have to
[19:01] <Lunar_Lander> abort :-(
[19:01] <Lunar_Lander> Regards
[19:01] <Lunar_Lander> Keith "
[19:01] <Lunar_Lander> SHIT!
[19:02] <Lunar_Lander> sorry for that expression
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[19:22] <Laurenceb> Randomskk: sorry to keep pestering :P to run the bootloader, you reset and hold BOOT0 high
[19:23] <Randomskk> yea. or low, I can't remember
[19:23] <Laurenceb> then what? - does it go straight into the bootloader?
[19:23] <Randomskk> yea
[19:23] <Randomskk> technically the bootloader can make it then boot from flash, which I should have done
[19:23] <Laurenceb> so i could start up bootloader on pc, hit reset button whilst holding boot button down
[19:23] <Randomskk> but instead I usually just reboot again after that
[19:23] <Laurenceb> yeah
[19:23] <Randomskk> other way around
[19:23] <Randomskk> hold down BOOT0
[19:23] <Randomskk> reset
[19:24] <Randomskk> then start the script on computer
[19:24] <Laurenceb> iok
[19:24] <Randomskk> it'l stay in bootloader mode after the reset, waiting for serial comms
[19:24] <Laurenceb> neat
[19:24] <Laurenceb> need to get the link cable made up first
[19:25] <Laurenceb> cp2102 board and some ribbon cable
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[19:28] <Lunar_Lander> wb m1x10
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[20:08] <griffonbot> Received email: Mission Excelsior "Re: [UKHAS] Re: My 1st HAB launch in Ireland."
[20:11] <SpeedEvil> http://fatpita.net/?i=9612
[20:47] <m1x10> i wonder how jcoxon took that pic: http://www.flickr.com/photos/jcoxon77/5708576126/in/photostream
[20:48] <russss> lol
[20:49] <Lunar_Lander> xD
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[20:50] <LazyLeopard> Heh :)
[20:50] <Randomskk> m1x10: squirrel was running SSTC on the ATLAS2 launch
[20:51] <Randomskk> SSTV, evne
[20:51] <Randomskk> even, even
[20:51] <m1x10> what is squirrel?
[20:51] <LazyLeopard> Has the payload been recovered yet?
[20:51] <Laurenceb> a small mammal
[20:53] <Randomskk> m1x10: android app
[20:53] <Randomskk> generates rtty and sstv and controls the camera and does SMS
[20:53] <Randomskk> audio output via headphone port direct to ntx2 for radi
[20:55] <m1x10> damn
[20:55] <m1x10> sounds bad
[20:56] <Randomskk> it was great
[20:56] <m1x10> sure
[20:56] <m1x10> what spaceship was transmitting this picture of the moon?
[21:01] <Randomskk> the above android phone
[21:01] <m1x10> i dont get it
[21:02] <Randomskk> it wasn't a photo from the camera
[21:02] <jonsowman> that's what you think :P
[21:02] <Randomskk> stock photo we were transmitting over sstv as couldn't put a hole in the payload for the camera
[21:02] <Randomskk> hah
[21:02] <Randomskk> actually our rockoon program is coming up roses
[21:03] <jonsowman> haha
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[21:57] <griffonbot> Received email: Frank Ryan Jr "[UKHAS] A few questions about balloons"
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[22:40] <natrium42> o/
[22:40] <Dan-K2VOL> hey Alexei
[22:41] <Dan-K2VOL> looking forward to your UK trip?
[22:42] <natrium42> am already in UK :)
[22:42] <Lunar_Lander> back on station
[22:42] <Dan-K2VOL> nice!
[22:42] <Dan-K2VOL> where at now
[22:42] <natrium42> met with ed, adam and james today
[22:43] <natrium42> london
[22:43] <natrium42> flying back to canada tomorrow
[22:43] <Dan-K2VOL> that's very cool
[22:43] <Dan-K2VOL> how were they
[22:43] <natrium42> very nice
[22:43] <Dan-K2VOL> :-)
[22:43] <natrium42> got to see cambridge university
[22:44] <Dan-K2VOL> very cool, stop by to visit professor hawking?
[22:44] <natrium42> and CUSF lab
[22:44] <natrium42> lol
[22:44] <natrium42> maybe next time
[22:44] <natrium42> how are you?
[22:44] <natrium42> got antenna problems sorted?
[22:44] <Dan-K2VOL> doing well, I'm down in a coffee shop buying sparkfun parts to take my mind off of antenna problems :-P
[22:45] <Dan-K2VOL> not sorted, but more clues have come in.
[22:46] <Dan-K2VOL> we finally spoke with a fellow from Inventive Technologies, the main mfr of antennas that orbcomm recommends
[22:46] <Dan-K2VOL> as they sell a quad helix
[22:46] <natrium42> ah, k
[22:46] <Dan-K2VOL> he confirmed that we were on the right track, with a quad helix (that's what all the pros seem to say)
[22:46] juxta (~juxta@ppp203-122-193-94.static.internode.on.net) joined #highaltitude.
[22:46] <Dan-K2VOL> and he admitted that not one of their antennas would be nearly light enough
[22:47] <Dan-K2VOL> he said our construction techniques and materials were sound though!
[22:47] <Dan-K2VOL> and here's the golden nugget: we need to tune the antenna to be centered on 144MHz, not at the TX frequency
[22:48] <Dan-K2VOL> I think with one loop tuned for the TX freq and one loop at the RX freq
[22:48] <Dan-K2VOL> our hackerspace looks like we're obsessed with DNA models, there's discarded QFH antennas littering the ceiling
[22:49] <Lunar_Lander> hi Dan-K2VOL natrium42
[22:49] <Dan-K2VOL> hi Kevin!
[22:50] <Dan-K2VOL> natrium42, are you at your hotel or out? must be getting late there
[22:50] <Dan-K2VOL> how was your weekend Kevin?
[22:50] <Dan-K2VOL> Alexei, will you still be around Toronto this summer?
[22:51] <Lunar_Lander> I am fine thanks Dan-K2VOL
[22:51] <Lunar_Lander> my weekend was nice, I was in Duesseldorf on Friday
[22:51] <Lunar_Lander> the city with the eurovision song contest
[22:51] <Lunar_Lander> also, I wrote a math exam that friday
[22:52] <Lunar_Lander> about the gaussian and stoke's integral, div, grad, curl and so on
[22:52] <Dan-K2VOL> busy weekend! sounds good though, you giving the exam?
[22:52] <Lunar_Lander> no, I had to write it
[22:52] <Lunar_Lander> and I already have the results from the professor
[22:52] <Lunar_Lander> 220 points were possible
[22:52] <Lunar_Lander> and I scored
[22:52] <Lunar_Lander> 190
[22:53] <Dan-K2VOL> not bad!!
[22:53] <Lunar_Lander> yeah
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[22:53] <Lunar_Lander> that is an 1.0
[22:53] <Lunar_Lander> or an A
[22:53] <Dan-K2VOL> is that calculus?
[22:53] <Lunar_Lander> it is awesome
[22:54] <Lunar_Lander> yeah vector calculus
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[22:54] <Dan-K2VOL> this is funny Kevin, you have introduced me to more local phrases and things in this one conversation than in all the other
[22:54] <Dan-K2VOL> s
[22:54] <Lunar_Lander> cool
[22:54] <Lunar_Lander> so how is that
[22:54] <Lunar_Lander> in matrices
[22:55] <Dan-K2VOL> let me explain- I don't watch media, so I had to google the eurovision thing
[22:55] <Lunar_Lander> you get "eigenvalues, eigenvectors and eigenspace"
[22:55] <Lunar_Lander> oh ok
[22:55] <Dan-K2VOL> and in my dialect "write the exam" would be what the professor does, and "take" would be writing in the answers
[22:55] <Lunar_Lander> oh yeah, sorry
[22:55] <Lunar_Lander> I mixed that one up
[22:55] <Dan-K2VOL> and of course the 1.0 here would be a failing grade :-P
[22:55] <Dan-K2VOL> 4 would be A
[22:56] <Lunar_Lander> oh :P
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[22:56] <Lunar_Lander> so it is inverted
[22:56] <Dan-K2VOL> thank you for expanding my awareness of these things
[22:56] <Lunar_Lander> 4.0 here is "barely passed"
[22:56] <Lunar_Lander> you are welcome :)
[22:57] <Dan-K2VOL> what part of germany are you going to school in again?
[22:57] <Lunar_Lander> Lower Saxony
[22:57] <Lunar_Lander> that is the North-West of German
[22:57] <Lunar_Lander> +y
[22:58] <Dan-K2VOL> ah yes
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[22:58] <Dan-K2VOL> I've been watching lots of ancient german films on Netflix
[22:59] <Lunar_Lander> cool
[22:59] <Dan-K2VOL> I've just taken to putting up a silent film while I work in the hackerspace
[22:59] <Dan-K2VOL> and most of them on netflix happen to be german ones
[23:00] <Lunar_Lander> ah
[23:00] <Lunar_Lander> sounds like the mystery science theater 3000
[23:00] <Lunar_Lander> you watching an old film alone in a lab
[23:00] <natrium42> Dan-K2VOL: in hotel, gonna catch some sleep
[23:00] <Lunar_Lander> :D
[23:00] <Dan-K2VOL> they've been good, Metropolis, of course, Berlin: Symphony Of A Great City / Opus 1
[23:00] <natrium42> Dan-K2VOL: not sure if i will be in toronto
[23:00] <Lunar_Lander> cool!
[23:00] <natrium42> g'nite all!
[23:00] <Lunar_Lander> so it is not MST3K
[23:00] <Lunar_Lander> night natrium42
[23:01] <Dan-K2VOL> cool, good luck alexei, I'll be passing through the last weekend in July, hope to catch you if you're around
[23:01] <Dan-K2VOL> night
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[23:02] <Dan-K2VOL> no not MST3K, though you could certainly take some good jokes at them, they're interesting time capsules
[23:03] <Dan-K2VOL> and I do like MST3K
[23:06] <Dan-K2VOL> what will you do after school Lunar_Lander
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[23:35] <Randomskk> Laurenceb_: check out how perfect this ATmega32M1 is for brushless ESC
[23:35] <Randomskk> it has a PSC peripheral
[23:36] <Randomskk> power stage controller
[23:36] <Randomskk> "PWM waveform generation function with 6 complementary programmable outputs (able to control 3 half-bridges), programmable dead time control, PWM up to 12 bit resolution, PWM clock frequency up to 64MHz via PLL, programmable trigger, automatic overlap protection, failsafe emergency inputs"
[23:37] <Randomskk> it also has four analog comparators, ideal for bemf zc detection
[23:37] <Randomskk> and CAN, LIN, a UART, SPI
[23:37] <Randomskk> I really wish farnell stocked it
[23:41] <griffonbot> Received email: Adam Greig "Re: [UKHAS] A few questions about balloons"
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[00:00] --- Mon May 16 2011