highaltitude.log.20110126

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[00:40] <Darkside> hey juxta
[00:41] <Darkside> good job on the twitter post
[00:41] <juxta> heya Darkside
[00:41] <juxta> :)
[00:41] <Darkside> i want people to re-tweet that, not the lifehacker post
[00:41] <juxta> oh there's a lifehacker post?
[00:41] <Darkside> yep
[00:41] <Darkside> its what eeryone has been re-tweeting
[00:41] <Darkside> im surprised they managed to embed the video
[00:42] <juxta> oh, hehe
[00:42] <juxta> I asked Grant to open up video embedds
[00:42] <Darkside> oh coo
[00:42] <Darkside> i did too
[00:42] <Darkside> :P
[00:42] <Darkside> its still private on vimeo tho
[00:42] <Darkside> i wanted to see the number of views
[00:42] <juxta> there's a fair few hits on the blog atm
[00:42] <Darkside> no doubt :P
[00:43] <Darkside> #lca2011 is trending i think
[00:43] <Darkside> or its getting close
[00:43] <juxta> ok just spoke to grant
[00:43] <juxta> it
[00:43] <juxta> it's public now
[00:43] <Darkside> cool
[00:44] <Darkside> 123 plays
[00:44] <Darkside> haha
[00:44] <Darkside> that'll go up :P
[00:45] <Darkside> i see he didn't make it available for download
[00:45] <Darkside> tell him he can if he wants, i don't mind
[00:45] <juxta> yeah he said he didnt want to
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[00:45] <juxta> for now at least
[00:46] <Darkside> ok
[00:46] <juxta> yay a comment on the blog :P
[00:47] <Darkside> haha
[00:47] <Darkside> in 2 languages too
[00:48] <earthshine> What blog ?
[00:49] <juxta> earthshine, www.projecthorus.org
[00:50] <Darkside> juxta: see if you hackaday contact can get it up
[00:50] <juxta> sure
[00:51] <Darkside> i think joel was going to try and contact the main writer for linux news
[00:51] <Darkside> and get him to do a story, and post that
[01:20] <shenki> lwn.net
[01:22] <Darkside> juxta: http://i.imgur.com/rAqUj.jpg
[01:25] <Darkside> hes here
[01:25] <Darkside> just chatteds to him
[01:27] <juxta> Darkside, who is that?
[01:27] <juxta> mr back of head man? :P
[01:28] <Darkside> lol
[01:28] <Darkside> sorry, bad pic
[01:28] <Darkside> pic is unrelated
[01:28] <juxta> i'm stepping out for a while, have to go to a congratulations party for one of our friends who was awarded order of Australia today
[01:28] <Darkside> just thought you might like it :)
[01:28] <juxta> :)
[01:29] <juxta> back in a little while
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[07:16] <Darkside> dammit juxta isn't here
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[07:26] <eroomde> I thik the whole rest of my life will be taunted by f*cking furry things in space
[07:28] <Darkside> hahahahahaha
[07:28] <Darkside> well we want to launch a pony next
[07:28] <TraumaKitteh> D:
[07:30] <eroomde> I regret almost daily ever doing those bloody teddies
[07:30] <Darkside> haha
[07:30] <Darkside> TraumaKitteh: a nodepony :)
[07:30] <eroomde> stillt two years later 'oh! you're the ones who did the teddies in space!'.
[07:30] <TraumaKitteh> TraumaKitteh is logged in as TraumaPony
[07:30] <Darkside> haha
[07:30] <Darkside> we're gonna be teh ones who launched a tux..
[07:31] <eroomde> I guess we all need our furry mascots
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[07:36] <eroomde> Darkside: lovely video though - what's the camera?
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[07:46] <Darkside> GoPro HD Hero
[07:47] <eroomde> ah nice
[07:47] <eroomde> they're a bit spendy aren't they?
[07:47] <SpikeUK> erromde - Don't diss the teddies ;-)
[07:47] <eroomde> It just spurs us on to do the rockoon :)
[07:51] <Darkside> eroomde: about $300 i think
[07:54] <fsphil> love the layers in the atmosphere
[07:55] <fsphil> is that real or a camera artefact?
[08:04] <Darkside> real afaik
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[08:18] <m1x10> Hi all
[08:28] <fsphil> morning m1x10
[08:31] <m1x10> How r u fsphil
[08:31] <m1x10> ?
[08:37] <fsphil> kinda-awake :)
[08:37] <fsphil> you?
[08:39] <m1x10> ok, I finished 3 days of services and I got a 24-hour off
[08:40] <m1x10> now try to relax. Too much cold during the service. -6C !
[08:40] <fsphil> cool!
[08:41] <fsphil> that's nasty
[08:41] <fsphil> compared to that it's almost summer here ;)
[08:41] <m1x10> lol
[08:42] <m1x10> its bad to have that temp and standing 2 hours guarding things outside
[08:42] <m1x10> 2 hours * 3 times for each day
[08:42] <SpeedEvil> Make glove, not war.
[08:43] <m1x10> yeah! my gloves got eaten by dogs
[08:43] <fsphil> !!
[08:43] <m1x10> i was playing with them and they ripped off my gloves
[08:45] <m1x10> I got a pic of that moment but dont have it here.
[08:46] <m1x10> 2 days ago we got a war alert
[08:46] <m1x10> and after 10 hours they told us it was an excerice
[08:46] <m1x10> :p
[08:46] Action: SpeedEvil wonder who's invaing greece.
[08:48] <m1x10> http://translate.google.com/translate?js=n&prev=_t&hl=en&ie=UTF-8&layout=2&eotf=1&sl=el&tl=en&u=http%3A%2F%2Fwww.defencenet.gr%2Fdefence%2Findex.php%3Foption%3Dcom_content%26task%3Dview%26id%3D17084%26Itemid%3D83&act=url
[08:48] <m1x10> for SpeedEvil
[08:49] <SpeedEvil> fun
[08:49] <m1x10> no way
[08:49] <SpeedEvil> I forgot you had a land border with turkey
[08:50] <m1x10> my mission during the alarm was to upload a missile on a trailer and then upload the trailer on the stayer truck
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[08:51] <m1x10> from that border the asians pass to europe and come to your country SpeedEvil :)
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[08:53] <m1x10> its like the mexico and us borders
[08:53] <SpeedEvil> Can asians swim?
[08:53] <earthshine> morning
[08:53] <m1x10> hehe
[08:53] <m1x10> morning
[08:54] <m1x10> must go afk
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[09:11] <vk5gr> hi darkside!
[09:20] <m1x10> sanguino chips just arrived !
[09:22] <fsphil> mmm.. chips
[09:22] <m1x10> found a neat camera
[09:22] <fsphil> in yorkshire?
[09:23] <m1x10> 12grams, 1600x1200 (JPEG), microSD
[09:23] <m1x10> but costs 120$ :p
[09:23] <m1x10> http://www.crunchgear.com/2011/01/20/chobicam1-super-tiny-camcorder-weighs-12g/
[09:23] <m1x10> its a tiny DLSR
[09:23] <m1x10> can take lens !
[09:27] <fsphil> cute!
[09:29] <m1x10> the reason i got the new chips is that the previous I had malfunctioned
[09:29] <m1x10> I remember that I mixed the AVCC and AGND pins
[09:30] <m1x10> and after that they got crazy
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[09:31] <vk5gr> evening juxta
[09:32] <juxta> hey Grant
[09:33] <vk5gr> 551 hits and counting - 8 likes - 3 comments - and it isnt 24hrs old yet :-)
[09:33] <juxta> excellent :)
[09:34] <vk5gr> would you like that by country? :-) AUS 286 USA 47 Unkown 41 UK 26 NZ 13 Brazil 11 Canada 11 Germany 12 etc etc
[09:34] <juxta> haha
[09:34] <juxta> sadly I am not in the best state
[09:35] <juxta> aus day may have gotten the best f me
[09:35] <vk5gr> previouisly films I have posted have taken about 6-8 months to crack 1000 - this is going to do it in 1-2 days :-)
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[10:21] <m1x10> something extra lol is happening
[10:21] <m1x10> when i plug in the usb2tll stick
[10:21] <m1x10> win7 recognises it as a mouse
[10:21] <m1x10> and then my mouse does things on the screen !
[10:25] <fsphil> heh, dejavu
[10:26] <m1x10> i have a switch
[10:26] <m1x10> with 4 pins cube like
[10:26] <m1x10> does it have polarity?
[10:26] <m1x10> I mean does it matter which pin I wire to reset
[10:27] <m1x10> and the which of the 3 rest to GND ?
[10:27] <fsphil> probably
[10:27] <m1x10> mh
[10:27] <fsphil> test it with the multimeter
[10:27] <fsphil> its the only way to be sure
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[10:40] <earthshine> jcoxon: ping
[10:41] <earthshine> oh he's not on
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[10:48] <m1x10> nice, smooth 115200baud with camera and 644p at 3v3 at 7.3mhz :)
[10:50] <fsphil> woo!
[10:55] <m1x10> now I should run the time test
[10:56] <m1x10> 20 secs
[10:56] <m1x10> good
[10:57] <m1x10> although if I choose to print the whole bytes on serial in it will double the time
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[10:58] <fsphil> understandable
[11:04] <fsphil> it sends the entire image in one go doesn't it?
[11:05] <m1x10> no
[11:06] <m1x10> I send a 'bring-me-the-next-chunk command'
[11:06] <m1x10> i receive it
[11:06] <m1x10> then again
[11:06] <fsphil> aaah
[11:06] <fsphil> that's good
[11:06] <m1x10> yeah I can have a buffer of my own size
[11:06] <fsphil> the old cameras work the same way
[11:06] <m1x10> in the SRAM of the mcu
[11:07] <m1x10> now I use a buffer of 80bytes
[11:07] <m1x10> if I go more something is not workink :)
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[11:09] <vk5gr> juxta still there?
[11:09] <juxta_> yes
[11:09] <juxta_> sort of
[11:09] <juxta_> what is up ?
[11:10] <vk5gr> damn cable internet fell over - back to nextg
[11:10] <Upu> That Oliver person isn't going to get a NOTAM to launch is here :
[11:10] <Upu> http://goo.gl/maps/1ODl
[11:10] <vk5gr> was wondering when and how the auction was going to be run - do you know?
[11:10] <Upu> sorry http://goo.gl/maps/0S40
[11:10] <Upu> that one
[11:11] <vk5gr> btw now 627 hits
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[11:13] <griffonbot> Received email: Anthony Stirk <upuaut@gmail.com> "Re: [UKHAS] Festival appearance"
[11:13] <Upu> oo thats me
[11:13] <fsphil> Upu, if they're specific about the launch time then they might
[11:13] <Upu> well I've told him to apply and if he gets one I'll lend him a balloon :)
[11:13] <fsphil> haha
[11:14] <fsphil> any further forward with your own launch?
[11:14] <Upu> no still waiting on parachutes
[11:14] <Upu> order one from US one from UK neither have arrived yet
[11:14] <Upu> also no method of actually filling the balloon yet
[11:22] <fsphil> I got a small one from rocketsandthings lat week
[11:22] <fsphil> last
[11:22] <fsphil> 24 inch
[11:23] <fsphil> filling the balloon should be the easy bit?
[11:24] <fsphil> unless you don't have the filling attachment for the cylinder?
[11:25] <Upu> well
[11:25] <Upu> the Hwoyee balloons have an 8cms "hole"
[11:26] <fsphil> ah
[11:27] <Upu> which means I need to knock up some sort of adaptor
[11:27] <NigelMoby> Meh
[11:27] <Upu> struggling to find any plastic tubing of that size
[11:27] <NigelMoby> Feel like cack
[11:27] <Upu> but I'm trying to get some gum rubber tubing to go from the cylinder to the adaptor
[11:27] <Upu> but the supplier of that is being slow too
[11:29] <fsphil> I just used a hosepipe for the totex balloon, just folding the excess neck around the hosepipe and cable-tie'ing it
[11:30] <fsphil> there might be too much excess to do that with 8cm
[11:31] <vk5gr> you can see an example of what juxta has done to fill the Totex ballons on the video here: http://vimeo.com/16241165vk5gr/horus8story
[11:32] <vk5gr> you can see an example of what juxta has done to fill the Totex ballons on the video here: http://vimeo.com/vk5gr/horus8story
[11:32] <vk5gr> (sorry link error the first time)
[11:33] <Upu> thats what I'm thinking fsphil, let me watch that video brb
[11:38] <NigelMoby> Cool video
[11:40] <vk5gr> thanks NigelMoby!
[11:43] <Upu> http://ava.upuaut.net/files/horusfiller.jpg
[11:43] <Upu> thats exactly what I had in mind
[11:44] <Upu> I might go to BnQ at lunch time :)
[11:45] <vk5gr> it works - the only tricky bit (as you saw on the video) is the transition off the filler :-) get it wrong and it can be expensive (at least we were filling indoors)
[11:52] <vk5gr> g'nite all!
[11:53] <fsphil> night!
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[12:19] <fsphil> Upu, you recommended a few isps to me a while back -- can you remember what they where?
[12:22] <m1x10> fsphil: http://sphotos.ak.fbcdn.net/hphotos-ak-snc6/hs036.snc6/166647_1563550013490_1377549819_1330839_255196_n.jpg
[12:22] <m1x10> stupid horizontal lines :(
[12:23] <fsphil> power supply maybe
[12:23] <fsphil> I had something similar
[12:23] <fsphil> went away when I run it of batteries
[12:24] <m1x10> could be cause Im on 3v3
[12:24] <m1x10> look: http://sphotos.ak.fbcdn.net/hphotos-ak-snc6/hs257.snc6/180515_1563550933513_1377549819_1330841_8073625_n.jpg
[12:24] <m1x10> :p
[12:24] <m1x10> on the right Iam :p
[12:26] <Colin-G8TMV> m1x10: who is the guy in the middle dressed like a christmas tree
[12:26] <m1x10> :)
[12:27] <Colin-G8TMV> Actually, I'm looking at the two of you smiling and thinking - they each think it's the other thats going to be stuck on that point as the fairy
[12:28] <Laurenceb> that photo is epic
[12:29] <Laurenceb> needs some stupid caption... but i cant think of one
[12:29] <m1x10> lol
[12:29] <m1x10> post one and I'll put it :)
[12:34] <fsphil> lol
[12:36] <fsphil> Nice Christmas Tree you have there... shame of something where to happen to it
[12:39] <m1x10> haha
[12:39] <m1x10> Laurenceb - the bad mouth guy
[12:47] <fsphil> Greece army branches out
[12:50] <m1x10> lol
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[13:13] <fsphil> "Our peak hours are between 08:00 and 23:59..." .. hmm.. not really peak then
[13:32] <Upu> fsphil isp ?
[13:32] <Upu> as in internets ?
[13:33] <fsphil> yea, just basic access
[13:33] <Upu> Zen
[13:33] <Upu> really
[13:34] <fsphil> I'm with aaisp, and happy with them though their daytime rates are a bit excessive
[13:34] <fsphil> looking at the other options
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[13:40] <GW8RAK> Afternoon all. Has anyone found a source of party balloon fabric in the UK please? I have a need for some at work.
[13:51] <fsphil> not me anyway
[13:51] <fsphil> latex?
[13:51] <earthshine> mylar
[13:51] <earthshine> you just need mylar sheets
[13:52] <fsphil> oh the foil balloons
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[14:01] <GW8RAK> I need a weldable solid film which is impervious to water vapour and stays flexible at -45C
[14:02] <GW8RAK> The mylar/nylon films which have been mentioned on here in recent days would be ideal for testing. But all the suppliers are in the US and time is tight.
[14:07] <Laurenceb> http://www.russandrews.com/product.asp?lookup=1&region=UK&currency=GBP&pf_id=1558&customer_id=PAA1237014111701KYWGGSXPYLGKRJPJ
[14:07] <Laurenceb> looks good
[14:10] <GW8RAK> But not long enough for HAB'ing. Is the price a joke?
[14:10] <Laurenceb> i fear not
[14:11] <GW8RAK> Audiophiles are a strange bunch. I once broke up an old '60's valve transmitter and made a fortune with the valves on ebay. The vacuum is softer than modern ones and "gives a better tone"
[14:13] <m1x10> problem solving: http://imagebin.org/134467
[14:14] <m1x10> I have microSD + ISP programmer + SPi2Uart on same SPI bus on atmega644p.
[14:15] <m1x10> what can cause this :p
[14:24] <Darkside> hrmm
[14:24] <Darkside> how much lift will 1.4m^3 of helium give
[14:24] <Laurenceb> work itout
[14:24] <Darkside> :P
[14:24] <Darkside> getting there
[14:24] <Laurenceb> delta density * volume
[14:25] <Laurenceb> Archimedes ftw
[14:25] <Dan-K2VOL> m1x10, do you have resistors in your SPI line? http://www.atmel.com/dyn/resources/prod_documents/doc2521.pdf
[14:26] <Dan-K2VOL> GW8RAK, eroomde has some heptax I believe
[14:28] <GW8RAK> Dan-K2VOL thanks Dan. Just Googled it and it could suitable. I've never looked at these balloons with a technical eye and wonder how tear reistant they are.
[14:28] <m1x10> Dan-K2VOL: no
[14:28] <Laurenceb> sourcing plastic films online is a pita in my experience
[14:28] <Dan-K2VOL> m1x10, that's your problem
[14:29] <GW8RAK> We have used mylar sail cloth before now, but a meeting this morning got me wondering about balloon film
[14:29] <GW8RAK> Much lighter, but perhaps not so tear resistant
[14:29] <Dan-K2VOL> Gw8RAK, how tear resistant compared to what? The heptax is THE strongest film available for ballooning purposes
[14:30] <m1x10> Dan-K2VOL: can u help me?
[14:30] <GW8RAK> Strong enough to make a vapour barrier liner for a sleeping bag and such that someone can get in it and sleep without tearing.
[14:31] <Dan-K2VOL> or for cheaper, you can get similar strength by using just the strength core of the heptax, which is bi-axial nylon-6
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[14:31] <Dan-K2VOL> The bi-axial orientation of two layers created very good tear resistance
[14:31] <GW8RAK> Just googling for it.
[14:31] <Dan-K2VOL> Sleep in it? You aren't going to want to line a sleeping bag with a plastic bag, you're going to be soaking wet in the morning
[14:32] <Dan-K2VOL> You need something like gore-tex
[14:32] <Dan-K2VOL> Which will let vapor out, and keep air in
[14:32] <GW8RAK> Yes you are, but at least it keeps the moisture out of the sleeping bag. Goretex is a waste of time.
[14:32] <Dan-K2VOL> m1x10 helped you as much as I can right now by giving you the link
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[14:32] <GW8RAK> You actually want to keep moisture in with you. If it gets into the sleeping bag, it freezes and reduces the insulation
[14:32] <Dan-K2VOL> at work
[14:33] <Darkside> ok so with 1.4m^3 i goult actually get to 17km with a 400g payload
[14:33] <Darkside> lol
[14:33] <Darkside> and we're going to be *tethering* the bloody thing
[14:33] <Darkside> oh well, at least i'm not paying for the helium
[14:33] <Dan-K2VOL> GW8RAK, i'll just have to leave that to the sleeping bag manufacturers
[14:34] <GW8RAK> It sounds completely counter intuitive, but it works well at keeping the user warmer, if a little bit damper
[14:35] <Darkside> hmm
[14:35] <GW8RAK> As a rough guide after 4 weeks of a polar expedition, there can be upto 4kg of ice in the sleeping bag insulation
[14:35] <Darkside> whats the normal burst diameter for a 100g balloon?
[14:35] <Darkside> i think juxta said about 2m
[14:37] <Dan-K2VOL> Use liftwin from eoss.org I think
[14:37] <m1x10> Dan-K2VOL: http://imagebin.org/134471
[14:42] <Darkside> http://www.srcf.ucam.org/~cuspaceflight/calc/
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[15:59] <Laurenceb> STM8S103 is looking better than atmega168 imo
[15:59] <Laurenceb> might try some STM8s
[16:01] <earthshine> stm32
[16:02] <Laurenceb> http://uk.farnell.com/stmicroelectronics/stm8s-discovery/kit-development-stm8s-w-debugger/dp/1775251
[16:02] <earthshine> lpc xpresso
[16:02] <earthshine> xmos
[16:02] <Laurenceb> yeah, but stm8 is simpler and very low current
[16:02] <Laurenceb> xmos is lame
[16:02] <Laurenceb> well - it doesnt have hardware interfaces built in
[16:02] <Laurenceb> for i2c, adc etc
[16:09] <Laurenceb> wow they even have one with a 6 channel 16bit pwm
[16:09] <Laurenceb> perfect for BESC
[16:12] <Laurenceb> STM8L152xx is pretty epic .. maybe time to ditch avr
[16:12] <Laurenceb> lack of DMA is rather annoying
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[16:23] Nick change: TraumaKitteh -> TraumaKitteh[na]
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[16:23] Nick change: TraumaKitteh[nap -> TraumaKitteh
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[16:30] <eroomde> hi Dan-K2VOL1
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[16:35] <Dan-K2VOL1> Hi eroomde
[16:36] <Dan-K2VOL1> Was looking to see how expensive a narrow 2m long shipping tube would be to ship from the UK to US :-P
[16:36] Nick change: Dan-K2VOL1 -> Dan-K2VOL
[16:37] <eroomde> lol
[16:38] <eroomde> It nearly got chucked out
[16:46] <eroomde> (not by us I hasten to add, some department porters when they went spring cleaning in the lab we were squatting in)
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[16:56] <Randomskk> Laurenceb: woah. £7 for an stm8s discovery?
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[17:16] <eroomde> jcoxon: hi
[17:16] <eroomde> any news on launches?
[17:16] <jcoxon> hey eroomde
[17:16] <jcoxon> ummm just finishing the payload
[17:18] <jcoxon> will have more of a think this evening
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[17:20] <jcoxon> phew
[17:20] <jcoxon> radio working now
[17:21] <jcoxon> had to make some adjustments as it was being 'unstable'
[17:21] <Colin-G8TMV> jcoxon: camb-hams are interested in helping track if we get enough notice
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[17:22] <jcoxon> i'll need to have a chat with steve
[17:22] <jcoxon> especially as many camb students aren't around
[17:24] <jcoxon> okay so flight 'puter + gps + gps antenna + radio + lipo 1000mAh = 49.9g
[17:25] <Colin-G8TMV> box and insulation?
[17:25] <SpeedEvil> 85Kg.
[17:25] <SpeedEvil> Gonna need a beeeg balloon.
[17:25] <Colin-G8TMV> lol
[17:26] <SpeedEvil> I think it's more or less a wrap of bubble-wrap, and that's it. IIRC - based on the last.
[17:26] <SpeedEvil> It doesn't really get very cold at 5Km or so.
[17:26] <Colin-G8TMV> true
[17:28] Action: SpeedEvil ponders doing some bug triaging on firefox.
[17:28] <SpeedEvil> Actually - I think I need to clean the toilet.
[17:29] <jcoxon> Colin-G8TMV, yeah i'm aiming for 75g in total
[17:29] <jcoxon> but
[17:29] <jcoxon> i could add a solar panel
[17:30] Action: SpeedEvil throws bits of broken cell at jcoxon.
[17:30] <jcoxon> also going to need an antenna
[17:31] <SpeedEvil> I got a box of shards from ebay.
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[17:44] <Dan-K2VOL> Eroomde
[17:47] <Dan-K2VOL> !grifonbot summon eroomde
[17:47] <Dan-K2VOL> !griffonbot summon eroomde
[17:48] <jonsowman> i don't know if eroomde is registered with zeusbot to summon
[17:48] <Dan-K2VOL> Hmm, am I doing that wrong or is there no feedback
[17:48] <Dan-K2VOL> Ah
[17:48] <Dan-K2VOL> Thank you jonsowman
[17:48] <jonsowman> otherwise, it just emails james
[17:48] <jonsowman> who will be rather confused
[17:48] <jonsowman> oh well
[17:48] <Dan-K2VOL> lol!
[17:48] <Dan-K2VOL> can we register for it?
[17:48] <jcoxon> nah it emailed him
[17:48] <jcoxon> i added a few more people
[17:48] <Dan-K2VOL> Cool
[17:48] <eroomde> Dan-K2VOL: sorry am here
[17:48] <jonsowman> thanks jcoxon
[17:48] <eroomde> what can i do you for
[17:49] <jonsowman> jcoxon: am i on there?
[17:49] <Dan-K2VOL> Hey ed, would you be willing to sell us some of the heptax and roll it up into a shipping tube?  I'll locate a suitable tube, and pay for shipping etc.
[17:49] <jcoxon> actually i'm not sure it works
[17:49] <jcoxon> ever since we moved servers
[17:49] <eroomde> Dan-K2VOL: first you must let me go to the lab and identify which rolls are what
[17:50] <eroomde> as everything was thoroughly mothballed after the porters started chucking away lots of the stuff in our old lab
[17:50] <Dan-K2VOL> Ah gotcha
[17:51] <eroomde> but i'll get back to you within 2 days
[17:51] <Dan-K2VOL> cool, thank you
[17:52] <jcoxon> hooray - picoatlas has battery voltage sensing
[17:53] <Dan-K2VOL> Nice
[17:53] <jcoxon> that said
[17:53] <jcoxon> the adc is reporting perhaps not what i was expecting
[17:54] <russss> what does picoatlas not have?
[17:54] <jcoxon> camera!
[17:54] <russss> ah, point.
[17:54] <russss> camera would be awesome. Do you have enough lift to get one of those keyring video cams on it?
[17:55] <russss> at that altitude I expect a downward-looking view would be pretty cool
[17:55] <russss> cloud notwithstanding.
[17:57] <jcoxon> i do have a jpeg camera
[17:57] <jcoxon> in theory we have the hardware to do fsphil's jpeg txing
[17:57] <jcoxon> hehe
[17:57] <jcoxon> another day
[17:57] <russss> http://cgi.ebay.co.uk/Spy-camera-Car-key-chain-hidden-camcorder-key-ring-DVR-/250688870693?pt=UK_CCTV&hash=item3a5e389925#ht_3726wt_918
[17:59] <jcoxon> so i've done a resistor divider
[17:59] <jcoxon> and with the multimeter it reads 3.16v
[17:59] <jcoxon> analogRead = 36
[18:01] <Dan-K2VOL> Nice
[18:01] <jcoxon> but i was expecting a larger number
[18:01] <jcoxon> considering its out of 1024
[18:05] <Dan-K2VOL> Hmm, what's your Aref reference voltage pin connected to
[18:05] <jcoxon> its not
[18:05] <Dan-K2VOL> There's your problem
[18:06] <Dan-K2VOL> Unless you're using another reference
[18:06] <jcoxon> i was working on the assumption that i'm using the default
[18:06] <jcoxon> http://arduino.cc/en/Reference/AnalogReference
[18:06] <Dan-K2VOL> hmm
[18:06] <Dan-K2VOL> thought it was plain AVR
[18:06] <jcoxon> yeah
[18:07] <jcoxon> might be worth me connecting aref to 3.3v output from the reg
[18:07] <Dan-K2VOL> Well, try it connecting it to the aref to see if it changes
[18:07] <Dan-K2VOL> Though there's a warning about the order of doing that in that document
[18:07] <Dan-K2VOL> Heh yes, what you said
[18:08] <Dan-K2VOL> Also make sure your variable is 16 bits long, and unsigned
[18:09] <Dan-K2VOL> Though I guess it returns a signed int
[18:09] <Dan-K2VOL> Which should be ok
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[18:23] <Dan-K2VOL> anyone over in the UK know of a parcel shipping company that will ship a long tube other than UPS, FedEx, DHL and RoyalMail?
[18:23] <Dan-K2VOL> (RoyalMail won't internationally)
[18:27] <eroomde> no
[18:27] <SpeedEvil> how long?
[18:27] <SpeedEvil> tried ups?
[18:30] <russss> Dan-K2VOL: I'm sure Parcel Force will. They'll just hand it off to their counterpart in the destination country.
[18:30] <russss> I've had some sizeable packages through the USPS/Parcelforce route, I would suspect you can do the reverse.
[18:30] <Dan-K2VOL> SpeedEvil, yes, I've gotten quotes from or checked with all the ones I listed
[18:31] <Dan-K2VOL> Ok, cool, it'll be a tube about 210cm long, which is usually the part they balk at
[18:31] <Dan-K2VOL> Russss I'll check out parcelforce
[18:31] <SpeedEvil> Dan-K2VOL: yes - you left out UPS - hence...
[18:32] <russss> SpeedEvil: he didn't
[18:33] <SpeedEvil> Well - it was scrolled of the right of my window - which is the same as leaving it out. :)
[18:33] <eroomde> SpeedEvil: yep, infact UPS was the forst one he listed
[18:33] <Dan-K2VOL> hehe
[18:33] <eroomde> maybe reading wine lists in restaurants makes you blind to the first element of a list
[18:33] <laurence_> SpeedEvil: Ive posted off the sdram ics
[18:34] Nick change: laurence_ -> Laurenceb_
[18:34] <SpeedEvil> Laurenceb: Woo!
[18:34] <SpeedEvil> Laurenceb: Did you ctually get them working yet?
[18:34] <SpeedEvil> In other than 8M mode.
[18:34] <Laurenceb_> no
[18:34] <Laurenceb_> I havent tried
[18:34] <SpeedEvil> :)
[18:34] <SpeedEvil> Know how that goes.
[18:34] <Laurenceb_> im thinking 32M mode may work
[18:34] <SpeedEvil> I spent today posting stuff for ebay.
[18:34] <Dan-K2VOL> Darn too long for parcelforce
[18:35] <SpeedEvil> Dan-K2VOL: wht's it?
[18:36] <eroomde> vapourware for the time being, SpeedEvil
[18:36] <Dan-K2VOL> I'm trying to see if it's possible to get some of that 2m wide heptax film ed moore has, without folding it up
[18:37] <Dan-K2VOL> But there's many ifs before that
[18:37] <eroomde> not so much vapourware as in-storage-somewhere-or-disposed-of-beware
[18:37] <Dan-K2VOL> Though of any film, that one would be the most resillient to the pinholes created by folding films
[18:38] <Dan-K2VOL> Oh disposed of would be heartbreaking
[18:38] <eroomde> jcoxon: the actually bit of zeusbot that does the summoning doesn't seem to be doing any summoning, you should know
[18:38] <Dan-K2VOL> looks like UPS/FedEx will do it for about 100-150GBP
[18:38] <eroomde> Dan-K2VOL: yes indeed - there were km's of the stuff!
[18:39] <eroomde> JAXA might have some?
[18:39] <Dan-K2VOL> And i've really never seen it available anywhere that wide
[18:39] <SpeedEvil> Dan-K2VOL: Ah
[18:39] <Dan-K2VOL> eroomde haha they sure would, but I don't imagine they'd sell any to us
[18:39] <Dan-K2VOL> Could ask though
[18:39] <eroomde> dunno. we got ours from gov/mil contractors
[18:40] <SpeedEvil> eroomde: when they were contracting?
[18:40] <eroomde> well, a guy called any infact
[18:40] <eroomde> andy*
[18:40] <jcoxon> eroomde, yeah i know
[18:40] <jcoxon> it died in the server transfer
[18:40] <eroomde> ah i see
[18:40] <eroomde> SpeedEvil: they still are contracting
[18:40] <eroomde> they've no contracted so much that you can't see them with the naked eye
[18:40] <eroomde> now*
[18:40] <Dan-K2VOL> someone lost a lot of money on that roll when the project was cancelled
[18:41] <SpeedEvil> eroomde: What was the project it as for?
[18:41] <eroomde> oh it was millions of pounds lost in all sorts of directions i think
[18:41] <eroomde> SpeedEvil: don't recall. balloon related.
[18:42] <jcoxon> was it the high alt manned attempt?
[18:42] <eroomde> some of it was for that but they comissioned a big warehouse for building the things for various projects
[18:42] <SpeedEvil> You wouldn't need barrier film for that though I imagine.
[18:42] <eroomde> well, they had to cancel attempt 1 due to micro-tears
[18:43] <eroomde> which ended up with the whole project being canned
[18:43] <SpeedEvil> Ah.
[18:43] <Dan-K2VOL> big balloons are hard to built
[18:43] <Dan-K2VOL> and expensive to fail
[18:44] <eroomde> like banks
[18:44] <eroomde> right, I am going to dash
[18:44] <eroomde> i feel like not cooking this evening. i stabbed myself in the thumb with my trusty sharp wusthof knife on tuesday
[18:44] <eroomde> it went right to the bone
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[18:44] <Lunar_Lander> hello
[18:44] <eroomde> chopping has held less appeal for the last couple of days as a result
[18:45] <jcoxon> i feel similar eroomde
[18:45] <jcoxon> cut my finger yesterday
[18:45] <jcoxon> alcohol gel hurts
[18:45] <jcoxon> and my job requires quite a lot of that
[18:45] <eroomde> i used savlon :)
[18:46] <SpeedEvil> jcoxon: I thought you were supposed to cut other peoples fingers.
[18:46] <Dan-K2VOL> Eroomde ouch! You need robots to be cooking for you
[18:46] <Dan-K2VOL> We all do
[18:46] <SpeedEvil> Someone stabbed me today.
[18:46] <SpeedEvil> Admittedly, it was a flu jab.
[18:46] <Lunar_Lander> oh no
[18:46] <eroomde> well i bandaged my hand up tight and it's not been giving me too much grief since then. they butterfly stitch things i got from boots are really good
[18:46] <jcoxon> steri-strips
[18:46] <eroomde> thanks
[18:47] <SpeedEvil> eroomde: Quick! http://b3ta.com/questions/diysurgery/
[18:47] <Lunar_Lander> as least today's balloons are better than back then
[18:47] <jcoxon> SpeedEvil, !
[18:47] <Lunar_Lander> back then you had to repair them with petrol-containing glues
[18:48] <Lunar_Lander> and petrol+wounds=ouch!
[18:48] <eroomde> jcoxon: these were crs-crossed
[18:49] <jcoxon> oh right
[18:49] <jcoxon> fair enough
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[19:01] <NigelMoby> Hmm
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[19:01] <NigelMoby> This flus a right swine
[19:03] <NigelMoby> Evening James
[19:04] <Randomskk> I can probably get email working with zeusbot again shortly or something
[19:04] <Randomskk> eroomde: any regrets about buying one really nice very sharp knife now? :P
[19:04] <Randomskk> if I stabbed myself with my tesco value knife I doubt it'd even penetrate my skin. it certainly struggles penetrating a pineapple
[19:04] <NigelMoby> Lol
[19:05] <SpeedEvil> Blunt knives can in some ways cause more injuries than sharp knives.
[19:05] <Randomskk> true
[19:06] <Randomskk> brb then will see about email
[19:06] <Lunar_Lander> yeah
[19:06] <Lunar_Lander> because you can slip off more easily
[19:07] <SpeedEvil> I tend to do a lot of chopping with my eyes shut.
[19:07] <SpeedEvil> Well - for onions at least.
[19:07] <SpeedEvil> You need to absopositively know where your knife is.
[19:08] <NigelMoby> I tend not to be effected by onions
[19:08] <SpeedEvil> If you know the knifeblade is vertical, it's against your knuckles, and your fingers are curled in - you're not going to cut yourself.
[19:08] <Lunar_Lander> yeah
[19:08] <Lunar_Lander> like the cooks on TV do it
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[19:19] <Josh___> hey everyone
[19:19] <Josh___> is anyone here?
[19:19] <NigelMoby> Hi josh
[19:19] <Josh___> wow! this is the first time i've used irc.freenode
[19:20] <Josh___> i'm working on a high altitude balloon project with a mate and wanted some advice
[19:20] <NigelMoby> :D
[19:20] <Josh___> is this the place to ask around?
[19:20] <jcoxon> yes
[19:21] <NigelMoby> Indeedy
[19:21] <NigelMoby> Jcoxon, atlas in post
[19:22] <Josh___> cool! i originally was inspired after watching a clip on youtube and 6 months down the line i've created a manual with a friend full of research, ideas and planning
[19:23] <Josh___> it's probably worth mentioning that we're both students and are doing this for fun/educational research with the money we can afford to spend
[19:23] <Lunar_Lander> like me Josh___
[19:24] <Josh___> cool!
[19:24] <SpeedEvil> the wiki - see topic - is good
[19:24] <Lunar_Lander> Josh___ are you UK or US based?
[19:24] <Josh___> yeah i've been reading up on that and also visited laods of other websites which have snippets of information
[19:24] <Josh___> i'm from surrey in the UK
[19:25] <Josh___> and you?
[19:25] <Randomskk> jcoxon: how do I restart zeusbot?
[19:25] Action: SpeedEvil is from Fife.
[19:25] <Randomskk> Josh___: where abouts in surrey? jonsowman and myself are also from around there
[19:25] <jcoxon> Randomskk, kill it
[19:25] <Josh___> haslemere
[19:25] <Lunar_Lander> I am from Osnabruck in Germany
[19:25] <Josh___> what about you randomskk?
[19:25] <Randomskk> weybridge kind of area
[19:26] <Josh___> ahhh about 15 mins down the road then!
[19:26] <jcoxon> Randomskk, http://spacenear.us/float-prediction/
[19:26] <SpeedEvil> we also have people from greece, canada, australia.
[19:26] <Randomskk> might have done it
[19:26] <SpeedEvil> also us
[19:26] <Lunar_Lander> yeah
[19:26] <Randomskk> perhaps not
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[19:28] <Randomskk> ...
[19:28] Action: Laurenceb_ has been playing with STVD in wine
[19:28] <Josh___> so one question i have....everyone has been saying kaymont is the best place to purchase the weather balloons? is this true and also how much roughly are the sounding balloons? i've sent them an email but not had a reply as of yet
[19:28] <Laurenceb_> really impressed, STM8 is massively better than STM7
[19:28] <Lunar_Lander> yeah same here
[19:29] <Lunar_Lander> Steve Randall is a good "reseller"
[19:29] <Lunar_Lander> one moment Josh___
[19:29] <Randomskk> Josh___: http://www.randomsolutions.co.uk/Random_Engineering/Welcome.html
[19:29] <Randomskk> Laurenceb_: stm8 looks really neat, only £7 for the discovery!?
[19:29] <Lunar_Lander> thanks Randomskk
[19:29] <Randomskk> well I didn't get an email so I guess that didn't fix it or something
[19:29] <Laurenceb_> yeah, I'll order one with my next farnell order
[19:29] <Josh___> thanks randomskk!
[19:29] <Randomskk> is there no way to have it reload scripts?
[19:30] <Laurenceb_> Randomskk: they have 6 channel 16 bit pwm
[19:30] <Randomskk> !!!!!
[19:30] <Laurenceb_> designed for BESC
[19:30] <Randomskk> totes using one for my besc
[19:30] <Randomskk> was really really considering an stm32
[19:30] <Randomskk> they are like, cheaper than atmegas for the new F100 range, with loads of imters
[19:30] <Laurenceb_> also DMA at 500Ksps ADC
[19:30] <Randomskk> loads of timers*
[19:30] <Randomskk> but STM8 looks even better
[19:30] <Laurenceb_> yeah, it beats avr
[19:30] <Randomskk> sounds good
[19:30] <Laurenceb_> 12 bit adc on some as well
[19:30] <Laurenceb_> and DAC
[19:31] <Laurenceb_> otherwise pretty equivalent to atmega, with lower operating voltage, better instruction set
[19:31] <Laurenceb_> hardware integer divide and multiply
[19:31] <Randomskk> sweet.
[19:31] <Randomskk> basically, much much better
[19:31] <Randomskk> !
[19:31] <Randomskk> blimey.
[19:31] <Laurenceb_> more of the instructions are single cycle
[19:32] <Laurenceb_> and 16mhz @2.95V +
[19:32] <Randomskk> !
[19:32] <Randomskk> jcoxon: so the smtpmail.py script is now working
[19:32] <Randomskk> but I'm not sure if zeusbot is calling it?
[19:34] <Randomskk> if I just run smtpmail.py it works
[19:34] <Laurenceb_> lower current than atmega as well i think
[19:34] <Laurenceb_> 2ma at 16mhz
[19:34] <jcoxon> Randomskk, the py script is executed but a tcl script
[19:34] <jcoxon> just looking for it
[19:34] <Randomskk> well
[19:34] <Randomskk> help-0.1.tcl should run it
[19:34] <Randomskk> and appears to
[19:34] <Randomskk> `python smtpmail.py bla randomskk` emails me
[19:35] <Laurenceb_> playing about with the STVD IDE atm, theres a sample library with loads of stuff, BESC examples in there i think
[19:35] <Randomskk> sweet
[19:35] <jcoxon> is it working?
[19:35] <Randomskk> oh, duh
[19:35] <Randomskk> no
[19:36] <Randomskk> because the path to the script is wrong
[19:36] <Randomskk> should have noticed that
[19:36] <Randomskk> sec
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[19:37] <Randomskk> jcoxon: some pretty nice float predictions
[19:38] <Randomskk> okay, summon works again
[19:38] <Randomskk> also I am now on the summon list
[19:38] <jcoxon> good flight path
[19:38] <Randomskk> jcoxon: I'm around this weekend
[19:38] <jcoxon> yay
[19:38] <jcoxon> up for a launch?
[19:39] <Randomskk> probably, though haven't sorted anything with chu for like helium access
[19:39] <Randomskk> I have no concrete plans for that weekend besides "oh god, so much work" which is basically a permanent state anyway
[19:39] <jcoxon> i'll have a chat with steve
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[19:39] <jonsowman> i'll email them if you like
[19:39] <jonsowman> but I won't be around at the weekend
[19:40] <Josh___> does anyone on here do paramotoring out of interest?
[19:40] <jcoxon> Randomskk, just left him a voicemail
[19:40] <jcoxon> he might have helium
[19:40] <jcoxon> and it might be portable
[19:41] <jcoxon> so we could move launch site
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[19:44] <Randomskk> cool
[19:44] <Randomskk> basically then I guess I'm up for a few hours but can't spend the whole day or something
[19:45] <Josh___> another question, when sending a payload up with a camcorder....can the lens be exposed to the atmosphere? or does it need to be covered by a sheet of glass or something as protection?
[19:45] <jcoxon> Randomskk, cool
[19:45] <jcoxon> well we'll launch and then you can pretend to launch while you really chat on irc and follow spacenear.us
[19:46] <Randomskk> :P
[19:46] <SpeedEvil> Josh___: remarkably, most cameras have been found to work.
[19:46] <jcoxon> yeah covering them often leads to condensation
[19:46] <SpeedEvil> Josh___: At least - if they are continually taking pictures, which generates a fair bit of heat
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[19:49] <Josh___> ah ok, i guess so long as it fits snug so that there no room for the elements to get around the lens and into the payload
[19:53] <Josh___> and then there's the payload.....if only i had enough money for an aerogel box....:D
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[19:55] <SpeedEvil> polystyrene works just fine.
[19:56] <Josh___> that's what i'm using :()
[19:56] <Josh___> i've gtg everyone but thanks so much for the advice and help
[19:56] <SpeedEvil> Wave
[19:56] <Josh___> i'm sure i'll be back on soon with more questions :/
[19:57] <Josh___> hehe happy ballooning!
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[20:26] <fsphil> hmm, 2400 baud is asking a bit much from fldigi
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[20:44] <RocketBoy> jcoxon: I have done some foil balloon testing
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[20:48] <jcoxon> RocketBoy, yeah...
[20:49] <RocketBoy> pressure testing an 18" anagarm - burst at about 1psi
[20:50] <jcoxon> okay
[20:51] <jcoxon> so 68 atmospheres
[20:51] <RocketBoy> slowly increasing pressure it go a pinhole leak in the seam (difficult to tell at what pressure that happened - perhaps about 0.5psi
[20:51] <Dan-K2VOL> The Heptax is supposed to burst at 4-5 psi
[20:51] <RocketBoy> on abot 1/15 of an atmosphere
[20:51] <Dan-K2VOL> And the heat-seal seams are reported to be stronger than the film
[20:52] <RocketBoy> it finally ripped along the seam for half the side of the body
[20:52] <jcoxon> RocketBoy, did you get the voice mail i left?
[20:52] <RocketBoy> nope
[20:52] NigeyS (~EcEnTiAl@cpc5-cdif12-2-0-cust155.5-1.cable.virginmedia.com) joined #highaltitude.
[20:52] <jcoxon> oh right
[20:53] <RocketBoy> ah - yes
[20:53] <RocketBoy> hang on
[20:53] <jcoxon> launch this weekend?
[20:53] <jcoxon> thats all
[20:53] <NigeyS> evening
[20:53] <Dan-K2VOL> what's the envelope for this weekend jcoxon
[20:53] <jcoxon> 3x 91cm foil balloons
[20:54] <jcoxon> (when they arrive...)
[20:54] <RocketBoy> oh right - im not sure I'll be ready - perhaps - but I can certainly support your launch
[20:54] <Dan-K2VOL> Ah nice size
[20:54] <jcoxon> RocketBoy, got my payload - insulation = 49.9g
[20:54] <Dan-K2VOL> How do you calculate how much lift to give them
[20:54] <jcoxon> we guessed last time
[20:55] <Dan-K2VOL> brad Zuph has been doing some math on that
[20:55] <Lunar_Lander> hello RocketBoy
[20:55] <Zuph> heh, just some, though :-p
[20:55] <jcoxon> RocketBoy, do you have a helium tank lying around?
[20:55] <RocketBoy> I was going to diestructivly test one of my 36" bit descided against it due to the pinhole seam leak
[20:55] <RocketBoy> sure - I have loads at the mo
[20:55] <jcoxon> i've run float predictions
[20:55] <jcoxon> http://spacenear.us/float-prediction/
[20:55] <jcoxon> thats from a suffolk launch site
[20:56] <jcoxon> if we've got helium we could launch from any where really
[20:56] <Lunar_Lander> Steve, did you already test one of the Hwoyees?
[20:56] <RocketBoy> what are speeds like?
[20:57] <NigeyS> jcoxon, that url working for you atm ?
[20:57] <jcoxon> 10 miles
[20:57] <jcoxon> yup
[20:57] <NigeyS> hm
[20:57] <NigeyS> js error again
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[20:58] <RocketBoy> Lunar_Lander: nope - but someone must be using one soon - I have sold a few
[20:58] <Lunar_Lander> that is goof
[20:58] <jcoxon> RocketBoy, sat or sun work for me
[20:58] <Lunar_Lander> sorry
[20:58] <Lunar_Lander> *
[20:58] <Lunar_Lander> good
[20:59] <RocketBoy> Sat/Sun: - ill let U know when I have got rurther with the software
[21:00] <Lunar_Lander> the 1600 should really show a little better altitude performance
[21:00] <Lunar_Lander> it has a slightly bigger burst volume than the 1500
[21:00] <jcoxon> okay cool - my payload is pretty much ready
[21:00] <jcoxon> still waiting on the balloons
[21:00] <jcoxon> so we'll launch 'something'
[21:00] <RocketBoy> I have had to re-build my development environment - its put me back a couple of days
[21:01] <jcoxon> eek
[21:01] <RocketBoy> well - if I don't launch u can have mine
[21:01] <RocketBoy> I have a 4th on oder
[21:01] <jcoxon> okay
[21:01] <jcoxon> i expect delivery very soon
[21:01] <jcoxon> so it'll be fine
[21:01] <RocketBoy> are u using fresh balloons?
[21:02] <jcoxon> yes
[21:02] <RocketBoy> did u keep your old ones?
[21:02] <jcoxon> no
[21:02] <Upu> I have 2 of the 1600g from Steve
[21:02] <jcoxon> they kept floating up in the car
[21:02] <Upu> still no parachutes though
[21:02] <jcoxon> i had to burst them or crash
[21:02] <RocketBoy> :-( thought I might pressure test them
[21:03] <RocketBoy> yeah - parachutes - slack steve
[21:03] <Upu> Well I have a cross form on order from US
[21:03] <Lunar_Lander> RocketBoy what do you think about these 1982 balloons that are on ebay at the moment?
[21:03] <Upu> and a normal one from a UK supplier
[21:04] <RocketBoy> 1982 balloons - ha ha -
[21:04] <RocketBoy> they are supposed to have a 18month shel life in ideal conditions
[21:05] <Lunar_Lander> yeah
[21:05] <Lunar_Lander> a team called "Project Soar" did use them successfully
[21:06] <RocketBoy> 30 yeear old balloons wow
[21:06] <Lunar_Lander> yeah
[21:06] <RocketBoy> jcoxon: what GPS are u using now?
[21:07] <jcoxon> gpsbee
[21:07] <RocketBoy> how does it compare for weight against the FSA03 - all in with antenna
[21:07] <jcoxon> 10.7 in total
[21:08] <jcoxon> 10.7g
[21:08] <jcoxon> thats with the mini patch antenna
[21:09] <RocketBoy> was that what U used on pico?
[21:10] <jcoxon> yes
[21:10] <jcoxon> but smaller antenna this time
[21:10] <jcoxon> that said i sort of prefer the additional sensitivity of the larger patch antenna
[21:11] <RocketBoy> yeah
[21:12] <jcoxon> i've rebuilt the payload
[21:12] <jcoxon> http://www.flickr.com/photos/jcoxon77/5388227691/
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[21:12] <jcoxon> thats teh battery + flight computer + gps
[21:12] <RocketBoy> so you don't think the FSA03 can be fixed to be more robust - like with a dab of glue?
[21:12] <jcoxon> yeah but before it breaks :-p
[21:13] <jcoxon> once its broken its pretty difficult to fix imo
[21:13] <RocketBoy> sure - I might still get some and ask you where U think i should glue it before it breaks
[21:13] <Colin-G8TMV> jcoxon: does your Li-po have a little circuit attached to it's terminals to control it?
[21:14] <jcoxon> yes
[21:14] <Colin-G8TMV> right, I think they all do - does it just control the end point voltages? or is it more clever than that?
[21:15] <Randomskk> it doesn't control voltage at all
[21:15] <Randomskk> they generally just stop them from overcharging and overdischarging
[21:15] <Randomskk> typically they will prevent very high currents and dangerously low voltages
[21:15] <Colin-G8TMV> yes, thats what I mean by control the voltage
[21:15] <Randomskk> ah, okay
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[21:15] <Randomskk> below 3.2V or so discharge, lipos break forever, so they try to stop that happening, and at very high charge/discharge currents, lipos burst into violent fires
[21:16] <Colin-G8TMV> yeah, I've seen the piccies on youtube
[21:16] <RocketBoy> OK - off to do battle with MP-LAB again - BBL
[21:16] <jcoxon> cya
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[21:18] <jcoxon> biab
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[21:21] <NigeyS> hm what is pps ?
[21:22] <Lunar_Lander> normally it is a post-post scriptum
[21:22] <Lunar_Lander> a second addendum to a letter
[21:23] <NigeyS> oh soz, meant PPS in reference to a gps module
[21:23] <Lunar_Lander> oh ok
[21:23] <Randomskk> pulse per second
[21:24] <NigeyS> ahh
[21:24] <NigeyS> thanks Randomskk
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[21:27] <jcoxon> could my adc be backwards?
[21:27] <jcoxon> so a low number is at the high end of the range
[21:29] <Colin-G8TMV> or your resistor divider chain might be backwards
[21:30] <jcoxon> just measured the input into the adc
[21:30] <jcoxon> its 3.2v
[21:31] <Colin-G8TMV> and what does it say?
[21:31] <jcoxon> 12
[21:31] <Randomskk> are you sure you are measuring what you think you are measuring
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[21:31] <Colin-G8TMV> get a pot so you can adjust it and see what happens
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[21:42] <NigeyS> hey juxta !
[21:42] <juxta> morning NigeyS
[21:43] <NigeyS> good morning :)
[21:44] <Lunar_Lander> hello juxta
[21:45] <jgrahamc> Evening all
[21:45] <juxta> hi Lunar_Lander
[21:45] <NigeyS> hi jgrahamc
[21:45] <Lunar_Lander> btw NigeyS I think I should continue to do writeups
[21:46] <Lunar_Lander> because I have 160 visitors on my blog up to now XD
[21:46] <NigeyS> you should, i find them very useful, especially when i miss a launch!
[21:46] <jgrahamc> Working on the RTTY for my HAB project tonight. I can hear it transmitting for the first time.
[21:46] <Lunar_Lander> yeah
[21:46] <Lunar_Lander> but someone here must alert me of imminent launches
[21:47] <NigeyS> jgrahamc, nice work :D
[21:47] <NigeyS> Lunar_Lander, theyre normally on the ukhas page or in the topic
[21:48] <jgrahamc> We'll see... messing around with resistor values to get the NTX2 to be fed the right voltages at the moment.
[21:48] <Lunar_Lander> yeah
[21:49] <Lunar_Lander> the criteria is that the launches are covered on spacenear or APRS
[21:49] <Lunar_Lander> and are not too late
[21:49] <Lunar_Lander> I mean an australian launch during the week is not possible for me
[21:49] <NigeyS> jgrahamc, that cann be a pain, there are a few guides on the wiki depending on what module you're using
[21:50] <jgrahamc> Ah. I've probably read those, but good idea to take a look again. Using the NTX2 being fed by an Arduino.
[21:50] <NigeyS> you using the .650 module ?
[21:51] <jgrahamc> Yes, I am.
[21:51] <fsphil> it's a brilliant moment when you see text decoding in fldigi :D
[21:51] <NigeyS> i have 1 here breadboarded, i can check my resistor values for you
[21:51] <jgrahamc> If I'm reading the datasheet correctly is covers 5kHz across the 0 to 3V range on the TX pin.
[21:52] <jgrahamc> Cool. I've currently got a 22K and a 37K making a voltage divider which is giving me 1.88V and 2.29V (a swing of 0.41V)
[21:53] <jgrahamc> Which I figure is giving me a shift of 680Hz. Which is higher than I was aiming for...
[21:55] <Randomskk> you want 0.2V shift usually
[21:55] <jgrahamc> Precisely, hence the fiddling around with resistors!
[21:56] <jcoxon> i use 22k+2k2+2k2 and then 2k2
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[21:57] <NigeyS> same as what ive got here, and my shift was 325 i think
[21:57] <juxta> you can also use the deviation adjustment on the ntx2 to finetune the shift without swapping resistors out
[21:57] <jgrahamc> NigeyS: you have the same as jcoxon?
[21:58] <jcoxon> remember your breadboard/stripboard/pcb also changes teh resistance
[21:58] <NigeyS> jgrahamc, yup
[22:00] <jgrahamc> OK. Well I have a handy 27K here so I'll go with a 27k and a 22k which is getting close to your configuration.
[22:02] <jgrahamc> Hmm. That configuration is still giving me a shift of about 0.4V. Time for some measurements on the board I think.
[22:03] <jcoxon> okay
[22:03] <jcoxon> dud adc
[22:03] <jcoxon> shifted to another one
[22:03] <jcoxon> and now it gives sensible numbers
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[22:06] <NigeyS> jcoxon, adc?
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[22:06] <jcoxon> analog to digital convertor
[22:06] <NigeyS> ahhh
[22:06] <jcoxon> so reads a voltage and gives a number
[22:06] <NigeyS> so your at 41g now eh ?
[22:07] <jcoxon> 49
[22:07] <jcoxon> but i think i'm going to go back to my large patch antenna
[22:07] <NigeyS> problems with the little guy ?
[22:08] <NigeyS> btw that locosys is very very sensitive 10 sats in 5 seconds if i take it outside .. and thats a cold start
[22:09] <jcoxon> yeah its a good gps
[22:09] <jcoxon> just a shame it doesn't do high high altis
[22:09] <jcoxon> alts*
[22:10] <NigeyS> yeah thats a nasty downside to it, its not to pricey either concidering .. and i got sent the 66 chan instead of the 32 channel so win win
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[22:11] <fsphil> sweet
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[22:11] <NigeyS> hey phil!
[22:11] <fsphil> o/
[22:11] <NigeyS> \o/
[22:11] <jgrahamc> The other tricky thing is the only receiver I have with me is a Yaesu VX-7R HT
[22:15] <fsphil> FM-only?
[22:15] <jgrahamc> It has three operating modes WFM (which is really for listening to commercial radio), NFM and AM.
[22:15] <Laurenceb_> Randomskk: http://www.cosmic-software.com/stm8.php
[22:15] <Laurenceb_> looks like thats the compiler st built into STVD
[22:15] <Randomskk> what assembler does it run?
[22:16] <Randomskk> or rather, does gcc support it at all?
[22:16] <Laurenceb_> no
[22:16] <Randomskk> :(
[22:16] <Randomskk> any linux support?
[22:16] <Laurenceb_> doesnt look like theres gcc support
[22:16] <Laurenceb_> it seems to be working under wine
[22:16] <fsphil> jgrahamc, looks a nice radio though
[22:16] <jgrahamc> Yes, it is a nice radio. Bought it second hand when I got my Foundation licence for some repeater fun.
[22:17] <Laurenceb_> but its only supported by renaissance and STVD
[22:17] <Laurenceb_> and ST only support windows
[22:17] <Randomskk> :(
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[22:18] <jgrahamc> I can tell that my little guy is transmitting because I can here a random buzz at 434.650 and the signal is strong.
[22:19] <fsphil> it might be possible to hack fldigi to decode the buzz
[22:19] <fsphil> though it'll never be as good as receiving with ssb
[22:19] <jgrahamc> I need to buy something that does SSB.
[22:19] <jgrahamc> Recommendations?
[22:20] <fsphil> FT790 or the FT817 are the most popular
[22:20] <jcoxon> ebay = 790r
[22:20] <fsphil> yea, +R
[22:20] <Randomskk> ft817 is a popular choice, 790R is cheaper
[22:20] <Randomskk> icon's ic7000 does a lot of modes
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[22:21] <jgrahamc> Yes, the ICOM is rather lovely, but £££
[22:21] <NigeyS> jgrahamc, i got a 790 on ebay for £100ish
[22:21] <jgrahamc> Ooh. That's closer to my budget.
[22:22] <fsphil> the funcube dongle can be used too but they're almost impossible to buy at the moment :)
[22:22] <Laurenceb_> im off, cya
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[22:23] <NigeyS> Cya Laurenceb_
[22:23] <jcoxon> yay it really is working now
[22:23] <jcoxon> phew
[22:23] <NigeyS> sigh of relief there J? :P
[22:23] <juxta> arg, I just realised spot automatically debit my card for renewals without telling me
[22:24] <NigeyS> juxta, isnt that illegal? :|
[22:24] <jcoxon> NigeyS, this seeeduino film is super fragile
[22:24] <jcoxon> its okay now that i've finished soldering etc and secured it
[22:24] <NigeyS> it looks it, i'd probably break it many times over :(
[22:24] <juxta> well I probably agreed to it when I signed up for the thing, but I forget
[22:24] <jcoxon> but things break easily
[22:24] <jcoxon> e.g. the led has stopped working
[22:24] <juxta> I presumed it was just a once off payment for a year of service, not a recurring thing
[22:24] <NigeyS> eek, how does it handle the soldering heat ?
[22:25] <fsphil> I wonder if doing the circuit dead-bug style would be the best choice, weight wise
[22:27] <jgrahamc> Well, 22K + 2.2K and a 27K give me a measured voltage shift of 0.24V at TX pin.
[22:28] <jgrahamc> That's pretty close. My calculation is that a voltage shift of 0.255V will give 425Hz. Now I just need a radio and FLDGI and I can see if reality = theory!
[22:29] <Randomskk> pfft, all you need is a radio and an ear with perfect pitch :P
[22:29] <NigeyS> hehe
[22:29] <jcoxon> jgrahamc, what you doing on saturday?
[22:29] <jcoxon> we might be launching
[22:29] <jcoxon> you could borrow one of my radios
[22:29] <jgrahamc> Not sure. I don't think there are any family activities planned. You launching picoatlas II?
[22:29] <jcoxon> yeah
[22:30] <jcoxon> i've got a ft790r you could borrow to do your testing
[22:30] <jgrahamc> Ah. That would be awesome.
[22:30] <fsphil> what's the predictions like jcoxon?
[22:30] <jgrahamc> Let me check with the higher power who has already gone to bed...
[22:30] <jgrahamc> From Churchill, right?
[22:30] <jcoxon> jgrahamc, not confirmed yet - will email the list
[22:30] <jcoxon> jgrahamc, we might move the launch site depending on weather
[22:31] <jcoxon> fsphil, good - will go WSW
[22:31] <jgrahamc> Which list?
[22:31] <fsphil> ah brilliant
[22:31] <jgrahamc> Dumb question I know but I follow you on Twitter, didn't realize there was a list.
[22:32] <fsphil> so you're using less weight and more lift? I wonder if I should get my receiver setup
[22:32] <jcoxon> ukhas
[22:32] <jcoxon> oh i'll tweet as well
[22:32] <jcoxon> fsphil, yeah
[22:32] <jcoxon> less weight, more balloons
[22:32] <fsphil> http://groups.google.com/group/ukhas?hl=en
[22:33] <jgrahamc> Thanks. I'll join the list.
[22:34] <NigeyS> jcoxon, finally its heading my way !
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[22:35] <jcoxon> http://www.flickr.com/photos/jcoxon77/sets/72157625669920351/
[22:36] <NigeyS> talk about tiny!
[22:36] <fsphil> I don't think anyone's getting much lighter than that
[22:36] <Randomskk> you say that
[22:36] <Randomskk> if you really wanted you could go silly light
[22:36] <jcoxon> you could pcb it all
[22:37] <jcoxon> of flexi-pcb it all
[22:37] <Randomskk> texas do a microchip that has 434 radio onboard, so no ntx2 or arduino
[22:37] <Randomskk> you can get a microchip for gps and a chipscale antenna
[22:37] <Randomskk> so you'd be talking two small microchips, a chipscale antenna, some form of 434 radio (lightweight stiff wire, say), and a battery
[22:37] <jcoxon> indeed
[22:37] <Randomskk> but yea, it's not really worth it
[22:37] <jcoxon> but a lot of hassle
[22:38] <Randomskk> loads of effort, all you get is a very light radio tracker
[22:38] <Randomskk> and expense, and design time and programming time
[22:38] <fsphil> could track large birds with it :)
[22:38] <jcoxon> hmmm i should add a on/off switch
[22:40] <jgrahamc> I saw a commercial radiosonde at the Science Museum last week (it's in the new Atmospheres section on climate change). That thing was small!
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[22:52] <Lunar_Lander> jgrahamc which one?
[22:52] <Lunar_Lander> Vaisala?
[22:53] <jgrahamc> It was a Vaisala.
[22:53] <Lunar_Lander> cool
[22:53] <Lunar_Lander> RS-80 or ao
[22:53] <Lunar_Lander> so
[22:53] <Lunar_Lander> or was it a RS-92 even?
[22:54] <jgrahamc> http://plixi.com/p/67676370
[22:56] <Lunar_Lander> cool
[22:56] <Lunar_Lander> RS-92
[22:57] <jgrahamc> The most interesting thing is underneath it: the special cord unfurling device.
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[22:59] <Lunar_Lander> yeah
[22:59] <griffonbot> Received email: Jon Sowman <jon.sowman@gmail.com> "Re: [UKHAS] Launch Locations"
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[23:03] <jgrahamc> OK. Time to put my toys away.
[23:03] <jgrahamc> Night
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[23:24] <jcoxon> night all
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[23:40] <earthshine> evening
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[23:44] <RocketBoy> night
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[23:46] <Lunar_Lander> night
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[23:57] <NigeyS> hey earthshine
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[00:00] --- Thu Jan 27 2011