highaltitude.log.20100726

[00:06] <jcoxon> night all
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[00:24] <DanielRichman> ugh that fix was disgusting
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[08:23] <m1x10> good morning ppl
[08:41] <Upu> morning
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[09:56] <juxta_> ping earthshine
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[12:50] <DanielRichman> Has anyone requested samples from ATMEL before?
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[14:49] <earthshine> juxta_: ping
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[15:19] <jcoxon> afternoon all
[15:21] <earthshine> hi
[15:21] <jcoxon> hey earthshine hows teh book going?
[15:22] <earthshine> ok thanks
[15:22] <earthshine> bloody hard work
[15:22] <jcoxon> i can imagine
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[15:28] <SpeedEvil> A picture is worth a thousand words.
[15:28] <SpeedEvil> I wonder how much a pop-up cartoon is worth.
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[17:16] <timbobel> hi all
[17:17] <timbobel> back from mexico.
[17:17] <timbobel> launch next sunday.
[17:19] <m1x10> mexico :)
[17:19] <timbobel> GF is frm mx
[17:19] <m1x10> GF ?
[17:21] <m1x10> woman ? :)
[17:22] <timbobel> yes
[17:22] <timbobel> girlfriend
[17:22] <timbobel> sorry for the lazy typing
[17:22] <timbobel> got back 1 minute ago
[17:22] <m1x10> and u r from?
[17:22] <timbobel> NL
[17:22] <timbobel> holland
[17:22] <m1x10> oh
[17:22] <m1x10> you got girl from so far?
[17:22] <m1x10> how did u meet?
[17:22] <timbobel> actually i snatched her from the belgians
[17:22] <timbobel> met in amsterdam
[17:22] <m1x10> hehe
[17:22] <timbobel> followed by bruges
[17:23] <timbobel> and so on
[17:23] <fsphil> hi timbobel, if I'm about I might try tracking though you're a bit further than I've done before
[17:23] <fsphil> should be interesting :)
[17:23] <timbobel> yes would be a good oppertunity to set the distance record maybe
[17:23] <m1x10> fsphil hello
[17:23] <timbobel> but still, the date isnt totally set, obvisouly, depending on the weather
[17:24] <timbobel> i still need a lot of knowledge from you guys
[17:24] <fsphil> hiya m1x10
[17:24] <timbobel> especially with the transmitantenna.. dont know anything about it. i have been told, 5 sticks of 17cm, is that right?
[17:26] <fsphil> yes, one vertical and four horizontal (angled slightly away from the vertical). makes a quarter-wave dipole
[17:26] <timbobel> but
[17:26] <timbobel> i guess it matters how you "get the signal there"
[17:26] <timbobel> to that antenna
[17:27] <fsphil> some 50ohm coax would do
[17:27] <fsphil> rg58 or the like
[17:28] <timbobel> okido
[17:28] <timbobel> sorry for the antenna ignorance.. but
[17:28] <timbobel> then i hook up the ANT cable up to the center of the cable, right?
[17:28] <fsphil> the centre conductor would be connected to the vertical part of the antenna, the outer shield to the four horizontal (the ground plane)
[17:28] <fsphil> brb!
[17:29] <timbobel> huh
[17:29] <timbobel> ooooh right
[17:29] <timbobel> thanks for that!
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[18:24] <Lunar_Lander> hello
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[18:32] <Upu> $GPGGA,173059.927,5345.1548,N,00149.0859,W,1,04,3.9,303.2,M,48.0,M,,0000*4C bingo :)
[18:32] <jcoxon> yay
[18:33] <Upu> I need to RTF Data sheets better next time :/
[18:33] <jcoxon> did you email bill brown?
[18:33] <DanielRichman> zeusbot knows where you live
[18:34] <Upu> :)
[18:34] <Upu> I did he didn't response but no problems a nice chap from inventek answered my query
[18:34] <jcoxon> floating pin?
[18:34] <Upu> dodgy solder no power to the antenna
[18:35] <jcoxon> said it was the ant!
[18:35] <Upu> so I've put a pin through the board and soldered that now
[18:35] <Upu> yes yuo did
[18:35] <Upu> So I know where I am which is a good start , and I can tell you the temperature as well
[18:35] <Upu> A quick question
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[18:36] <Upu> I understand below a certain altitude the radio telemetry becomes unreliable
[18:36] <Upu> and it's best to back it up with GSM
[18:36] <Upu> thats the case isn't it ?
[18:36] <Lunar_Lander> hi jcoxon and Upu
[18:36] <Upu> Hi Lunar
[18:36] <jcoxon> Upu, yes and no
[18:37] <jcoxon> you'd be suprised how low it can go and you get a good copy
[18:37] <jcoxon> with predictions its not a challenge to work out where it is
[18:37] <jcoxon> and a chase car can keep close
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[18:37] <Lunar_Lander> Upu are you new?
[18:37] <Lunar_Lander> jcoxon may I tell him about the June 26 ascent?
[18:37] <Upu> Well been a lurker for a while
[18:38] <Upu> you just did :)
[18:38] <jcoxon> Lunar_Lander, i've read about it
[18:38] <Lunar_Lander> yeah
[18:38] <Lunar_Lander> afaik they found a guy who found the payload
[18:38] <Lunar_Lander> but they don't know his name
[18:38] <Upu> I saw the HAB stuff about 3 years ago and made the assumption that as the UK wasn't very wide no one did it over here
[18:38] <Upu> however now I understand that's not the case :)
[18:38] <Lunar_Lander> yeah :)
[18:38] <jcoxon> Lunar_Lander, they found hte payloda but it was missing hte repeater iirc
[18:39] <Upu> so would you advise the fitting of a GSM chip or is it unnecessary ?
[18:39] <Lunar_Lander> the one with the 2 meter transmitter, ozone chip and solar panel and the austrian transponder?
[18:39] <jcoxon> if its not too much hassle then yeah
[18:39] <jcoxon> its a good backup
[18:40] <Upu> I guess it needs to be off until you get below a certain altitude or it may interfere with the other transmissions ?
[18:40] <Upu> not me mention chew battery
[18:41] <jcoxon> well it won't have any reception so will time out
[18:41] <jcoxon> i recommend going for a complete mobile phone
[18:41] <jcoxon> got its own battery, robustly built, quite easy to interface with
[18:41] <Upu> what's the normal weight of a launch ?
[18:41] <jcoxon> 500g - 1kg
[18:42] <Upu> ok cheers
[18:42] <jcoxon> lighter the better of course
[18:42] <jcoxon> better flight and safer
[18:42] <Upu> that's why I would prefer the GSM module
[18:42] <Upu> but I'll get the basics working first
[18:43] <Upu> ok final question should I go out and purchase a Radio, do I need any sort of license to use it if I'm not transmitting ?
[18:43] <Lunar_Lander> receiving is license-free
[18:43] <Upu> I know if I transmit I'm likely to get lots of radio amateurists on my door step trying to stab me with Yagis
[18:43] <jcoxon> you don't need a licence to purchase a radio
[18:43] <Upu> ok cool
[18:43] <jcoxon> or to recieve
[18:44] <jcoxon> but i recommend getting a licence - will teach you quite a bit
[18:44] <jcoxon> the exam is pretty easy
[18:44] <m1x10> yeah
[18:44] <m1x10> took my license 1 months ago
[18:44] <m1x10> studied about a week
[18:44] <Upu> yeah would make sense
[18:45] <m1x10> Upu, want to build a backup GSM module?
[18:45] <Upu> considering it
[18:45] <Upu> if it doesn't add too much complexity
[18:45] <m1x10> ah, ur like me
[18:45] <Upu> I might just get the temp sensors/GPS/ Radiometrix talking first
[18:46] <m1x10> on what freq?
[18:46] <jcoxon> Upu, i recommend it on a seperate system
[18:46] <jcoxon> self contained
[18:46] <jcoxon> as single failure and uh oh
[18:46] <Lunar_Lander> hi m1x10
[18:46] <m1x10> hey Lunar_Lander !!!!!!
[18:46] <Upu> Well that was another question, there are units out there with their own GPS builtin
[18:46] <Lunar_Lander> jcoxon I learned that laws are right the other way round in Germany than in the UK
[18:46] <Upu> so you get 2
[18:47] <m1x10> Upu what freq want to transmit?
[18:47] <Upu> 434.650Mhz
[18:47] <Lunar_Lander> Ham radio in the air is OK, ISM is forbidden
[18:47] <m1x10> ok
[18:47] <m1x10> HAM always do it the HAM way
[18:47] <m1x10> many people around the world could hear u
[18:47] <jcoxon> Upu, you in the UK? i recommend the 434.075Mhz module
[18:47] <Upu> I don't think I got much choice I ordered it from Farnell
[18:48] <jcoxon> as a few repeaters are on .650 and you might bump into a grumpy ham
[18:48] <Upu> noted
[18:48] <jcoxon> Upu, oh right - they are really only avaliable direct from radiometrix
[18:48] <Upu> I'll send this back and see if Farnell can oblige
[18:48] <jcoxon> and its far cheaper
[18:48] <jcoxon> 13pounds a module last time i purchased
[18:48] <Upu> yeah that is cheaper, I'll send this back and get another one then
[18:48] <Upu> thx
[18:49] <jcoxon> grumpy hams are happy with .075
[18:49] <m1x10> radiometrix rule :)
[18:49] <m1x10> i transmitted with the 144.8 300mw module and I got header 70km away
[18:50] <jcoxon> they recently said they might amend their description when they say the range is 500m :-p
[18:50] <Upu> right thanks for all the advise, appreciated
[18:50] <Upu> lol
[18:50] <Lunar_Lander> xD
[18:50] <m1x10> 500m joke !
[18:50] <Upu> Back down to earth I best go cook cheers
[18:50] <jcoxon> well 10mW on the ground is probably about 500m
[18:50] <jcoxon> on 434.075
[18:50] <Lunar_Lander> just wanted to mention that
[18:50] <m1x10> with a LOS and a good antenna you get very far
[18:51] <jcoxon> well its pretty much all the LOS part
[18:51] <m1x10> ah, i forgot to tell you
[18:51] <m1x10> I changed my plans and I will try to build a payload suitable for water landing :)
[18:52] <jcoxon> m1x10, ooo cool
[18:52] <jcoxon> that'll be a fun challenge
[18:52] <m1x10> jcoxon, yes
[18:52] <m1x10> here much place is water
[18:52] <m1x10> my cousin has a 5m boat
[18:52] <jcoxon> great
[18:53] <jcoxon> m1x10, radio on the sea will be a challenge - check out SPOT
[18:53] <m1x10> and he got license to travel down to cyprus
[18:53] <Lunar_Lander> Cyprus is dangerous isn't it?
[18:53] <jcoxon> would work in the sea
[18:53] <m1x10> Lunar_Lander what do u mean?
[18:53] <Lunar_Lander> yea because of the split of the island and so on
[18:53] <m1x10> ah..
[18:54] <jcoxon> its okay
[18:54] <m1x10> Im not going down there
[18:54] <Lunar_Lander> oh ok
[18:54] <m1x10> just to tell you that my cousin license can go too far
[18:54] <Lunar_Lander> ah
[18:54] <Lunar_Lander> cool :)
[18:54] <m1x10> this weekend we almost get lost in the sea :(
[18:55] <m1x10> some bas storm hit us in the middle of nowhere
[18:55] <m1x10> and i was scared
[18:55] <Lunar_Lander> oh shit!!!!!
[18:55] <m1x10> yes
[18:55] <m1x10> go slow down to 7miles/h
[18:55] <m1x10> so the waves dont hit us with strength
[18:56] <Lunar_Lander> yeah
[18:56] <m1x10> the wind was exactly opposite to us
[18:56] <m1x10> 6 bofor
[18:56] <Lunar_Lander> yeah that is a strong wind
[18:57] <m1x10> I was talking on the phone with people on the land trying to explain where we are
[18:57] <m1x10> my cousin was calm
[18:57] <m1x10> i got a bit panic
[18:57] <m1x10> and tommorow i header that one fisherman one the same place founded dead on the rocks
[18:58] <Lunar_Lander> oh noes
[18:58] <m1x10> heard*
[18:58] <m1x10> horrible situation. we was on the boat nearly 4 hours
[18:58] <Lunar_Lander> yeah
[18:58] <m1x10> I got very red :)
[18:58] <Lunar_Lander> :)
[18:58] <Lunar_Lander> but you made it back to the harbour safe and sound
[18:58] <m1x10> yes
[18:59] <m1x10> but i didnt eat anything for 1 day
[18:59] <Lunar_Lander> yea
[18:59] <m1x10> my stomach could accept
[18:59] <Lunar_Lander> seasick?
[18:59] <m1x10> no seasick
[18:59] <m1x10> from nerves
[18:59] <Lunar_Lander> ah
[18:59] <Lunar_Lander> yeah I had that too
[18:59] <Lunar_Lander> but from bacteria
[18:59] <Lunar_Lander> :D
[18:59] <m1x10> oh lol
[18:59] <m1x10> damn microbs
[19:00] <m1x10> I had with me my pda
[19:00] <m1x10> with my application
[19:00] <m1x10> which recorded all the path
[19:00] <m1x10> in kml data
[19:00] <m1x10> wait to give you a link
[19:02] <Lunar_Lander> yeah
[19:09] <m1x10> Lunar_Lander here?
[19:09] <Lunar_Lander> yes one moment
[19:09] <m1x10> ok
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[19:12] <fsphil> woo, got my uart camera working
[19:12] <fsphil> jonsowman, confirmed with cool components it is the 3.3v version -- my problem was the baud rate I used, it's stricter than the sparkfun model
[19:13] <Lunar_Lander> m1x10 I'm here
[19:15] <m1x10> Lunar_Lander get here
[19:15] <m1x10> http://mixio.herobo.com/iTrack/
[19:15] <m1x10> in map id give 1516.624.710.183
[19:15] <m1x10> and press that button on the right
[19:15] <Lunar_Lander> ok
[19:16] <m1x10> blue flag = start, red flag = end
[19:16] <m1x10> the helmet is the point of max speed we reached
[19:16] <m1x10> we speed up as soon as we got in the harbour
[19:17] <Lunar_Lander> yeahh
[19:17] <Lunar_Lander> it worls
[19:17] <Lunar_Lander> *works
[19:17] <m1x10> the red flag is the place I want to fly the balloon
[19:21] <Lunar_Lander> yeah
[19:21] <Lunar_Lander> seems like a cool place
[19:22] <m1x10> but need to design for water landing
[19:22] <m1x10> a task a bit more difficult i think
[19:22] <Lunar_Lander> yeah
[19:22] <Lunar_Lander> you need some buyoyant stuff
[19:23] <m1x10> i will try to think as simple as possible
[19:24] <m1x10> i though of putting arround the payload some number of plastic balls
[19:24] <m1x10> to keep payload on surface
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[19:24] <m1x10> the aprs antenna will be in the water but i dont what else to do
[19:24] <Lunar_Lander> yea
[19:24] <Lunar_Lander> but the balls seem to be a good idea
[19:25] <m1x10> yes
[19:25] <m1x10> considering a square box
[19:25] <m1x10> every corner will be cut
[19:25] <m1x10> and somehow i will add a tennis ball
[19:25] <m1x10> :)
[19:25] <Lunar_Lander> yea
[19:25] <Lunar_Lander> cool idea :D
[19:25] <m1x10> funny
[19:25] <m1x10> and cheap
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[19:26] <m1x10> its possible that the wind or the waves will turn the payload
[19:26] <fsphil> make the payload into a ball?
[19:26] <m1x10> so i should add the balls on all the corners
[19:27] <m1x10> fsphil i though of that but i dont know how to do it
[19:27] <m1x10> actually it was my first though
[19:27] <fsphil> yes it would be tricky making that shape
[19:27] <m1x10> its difficult to hold the things inside a ball shape
[19:28] <m1x10> but cutting the corners of the square payload and adding balls
[19:28] <m1x10> will transofm it somehow to a ball shape
[19:29] <m1x10> u understan how i mean it
[19:29] <fsphil> yes, square box packed inside a sphere
[19:29] <fsphil> good idea
[19:29] <m1x10> not exactly but something like this
[19:30] <m1x10> but how to solve the problem of the aprs antenna inside the water?
[19:30] <m1x10> will it transmit inside the water?
[19:31] <fsphil> I'm not sure on that - it should still transmit but the signal will be weakened
[19:31] <m1x10> take in mind that I will be nearby cause I will keep chasing it with a boat
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[19:34] Nick change: m1x10 -> m1x10_spaggeti
[19:35] <jonsowman> fsphil: I see
[19:35] <fsphil> here's a page about underwater communications: http://www.qsl.net/vk5br/UwaterComms.htm
[19:35] <jonsowman> is it all working now then?
[19:36] <fsphil> hi jonsowman, working nicely now
[19:36] <jonsowman> excellent :D
[19:36] <jonsowman> good to hear
[19:37] <fsphil> such a simple thing too
[19:38] <Lunar_Lander> hi fsphil jonsowman
[19:38] <fsphil> hi hi Lunar_Lander
[19:38] <jonsowman> hello Lunar_Lander
[19:38] <jonsowman> :)
[19:41] <Lunar_Lander> how's the life?
[19:51] <jonsowman> fine thanks
[19:51] <jonsowman> yourself?
[19:51] <Lunar_Lander> I'm starting to get well again
[20:08] <m1x10_spaggeti> fsphil, thx for the link
[20:08] Nick change: m1x10_spaggeti -> m1x10
[20:08] <m1x10> what uart camera did u work with?
[20:11] <fsphil> m1x10, this one: http://www.4dsystems.com.au/prod.php?id=75
[20:11] <m1x10> I want to find a simple video recorder with a battery cell and a sd card
[20:12] <fsphil> this is too slow for video unfortunately
[20:15] <jonsowman> m1x10: search for 720p key fob cameras on ebay
[20:16] <jonsowman> i want to stick one of them on a hab :)
[20:16] <m1x10> fob?
[20:17] <jonsowman> http://i34.tinypic.com/30ac5n4.jpg
[20:17] <jonsowman> this type of thing
[20:17] <jonsowman> http://www.pocket-lint.com/news/26663/thumbs-up-spy-gadget-key-fob-camera
[20:17] <jonsowman> brb
[20:20] <Lunar_Lander> btw can we also have 35 mm cameras on the balloon?
[20:21] <fsphil> you can have whatever you want if you're balloon is big enough to carry it, and you don't mind loosing it :)
[20:22] <fsphil> you're == your
[20:22] <Lunar_Lander> yeah
[20:22] <Lunar_Lander> like stripping down a camera so that it is just like a spooling mechanism with a light black box
[20:38] <m1x10> http://www.youtube.com/watch?v=pWU3ec4-p4c&NR=1
[20:39] <m1x10> jonsowman something like those?
[20:41] <jonsowman> m1x10: exactly
[20:41] <Lunar_Lander> jonsowman you consider that possible?
[20:41] <m1x10> Lunar_Lander they are so cheap that u can put 2-3 around the payload
[20:42] <Lunar_Lander> yeah
[20:42] <jonsowman> Lunar_Lander: certainly, why not?
[20:42] <Lunar_Lander> I actually bought one at Saturn for 5 Euro :)
[20:42] <Lunar_Lander> was just asking ;)
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[20:42] <jonsowman> ok :)
[20:43] <jonsowman> would be interesting to see what it comes back with
[20:43] <Lunar_Lander> yeah
[20:43] <Lunar_Lander> I saw a DIY polaroid camera
[20:44] <Lunar_Lander> the guy used two small baking forms, painted black
[20:44] <Lunar_Lander> he put the polaroid film inside and made a pinhole on the other side
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[20:47] <m1x10> jonsowman I think those cameras dont have suitable operating temperatures for use in HAM
[20:47] <m1x10> eg http://www.aee.com/en/productshow.asp?Sendid=40
[20:47] <m1x10> -10? ~50?
[20:47] <Lunar_Lander> what do you think about the polaroid idea?
[20:48] <m1x10> Lunar_Lander, me?
[20:48] <Lunar_Lander> yeah and all others :)
[20:48] <m1x10> I don't think I want to make things more complex
[20:48] <fsphil> would chemical photography work at low temperatures?
[20:49] <Lunar_Lander> good question
[20:49] <Lunar_Lander> do components stay warm when in a styrofoam box?
[20:50] <m1x10> people here say it can go down to -20C for sure
[20:50] <m1x10> so temperature might be a problem with those spy cams
[20:50] <m1x10> I got my sensor package working finally !
[20:50] <m1x10> 4.834 V, 27.1 C, 994 hPa, 39% RH, 13.6 C
[20:51] <Lunar_Lander> cool
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[20:51] <m1x10> arduino volt, temp, press, RH, dewpoint
[20:51] <Lunar_Lander> yay!
[20:51] <Lunar_Lander> well done m1x10
[20:51] <m1x10> :):)
[20:51] <sbasuita> i don't think temp is a problem
[20:51] <sbasuita> our payload didn't drop below 20
[20:52] <Lunar_Lander> Brávo m1x10
[20:52] <Lunar_Lander> xD
[20:52] <Lunar_Lander> yeah sbasuita
[20:52] <m1x10> haha
[20:52] <sbasuita> it was warmer in the air than on the ground
[20:52] <sbasuita> ;P
[20:53] <m1x10> i think i wiil use more batteries in series to get more voltage
[20:53] <Lunar_Lander> batteries are a pretty good heat source
[20:53] <m1x10> to be used for heating
[20:54] <m1x10> :)
[20:54] <sbasuita> you could just stick a chemical hand warmer in there
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[20:58] <m1x10> Im waiting my big order from sparkfun
[20:58] <m1x10> plus ublox board and a radioshield
[20:59] <m1x10> i think the items will take too long to arrive
[20:59] <m1x10> sparkfun does 2 weeks usually with USPS express
[20:59] <m1x10> but the other items will take much more
[21:02] <m1x10> Lunar_Lander thats for u: http://photojournal.jpl.nasa.gov/jpegMod/PIA12685_modest.jpg
[21:02] <Lunar_Lander> cool!
[21:02] <Lunar_Lander> saturn looks awesome :D
[21:02] <m1x10> and this
[21:02] <m1x10> http://photojournal.jpl.nasa.gov/jpegMod/PIA13197_modest.jpg
[21:03] <Lunar_Lander> cool
[21:03] <Lunar_Lander> on Mars?
[21:03] <m1x10> y
[21:03] <m1x10> :P
[21:03] <Lunar_Lander> do you know the Symphony of Science videos?
[21:04] <m1x10> http://photojournal.jpl.nasa.gov/jpegMod/PIA12973_modest.jpg
[21:04] <m1x10> no
[21:04] <Lunar_Lander> why's the one rock marked?
[21:04] <m1x10> it is the target
[21:05] <m1x10> the rover has a software engine that decides which rock could be best to be examined
[21:05] <Lunar_Lander> ah ok
[21:05] <Lunar_Lander> cool
[21:05] <Lunar_Lander> yeah the rock also looks quite symmetrical
[21:05] <m1x10> thats awesome: http://photojournal.jpl.nasa.gov/jpegMod/PIA12474_modest.jpg
[21:05] <Lunar_Lander> that looks interesting
[21:06] <Lunar_Lander> yeah
[21:06] <Lunar_Lander> the one rock lying in nowhere
[21:06] <Lunar_Lander> xD
[21:06] <m1x10> http://photojournal.jpl.nasa.gov/jpegMod/PIA12161_modest.jpg
[21:06] <m1x10> this one too :P
[21:07] <Lunar_Lander> xD
[21:07] <Lunar_Lander> hey
[21:07] <Lunar_Lander> almost looks like a beach xD
[21:07] <m1x10> mars looks friendly !!!
[21:07] <m1x10> y
[21:07] <m1x10> exactly what i was about to say
[21:07] <Lunar_Lander> you could imagine that there is the sea in the distance
[21:07] <Lunar_Lander> :D
[21:07] <Lunar_Lander> yeah
[21:07] <m1x10> :P
[21:07] <Lunar_Lander> NASA faked the rovers!
[21:07] <Lunar_Lander> :D
[21:07] <m1x10> mars looks easy for human to walk and stay
[21:07] <Lunar_Lander> just joking
[21:07] <Lunar_Lander> yeah
[21:08] <Lunar_Lander> http://www.youtube.com/watch?v=BZ5sWfhkpE0
[21:08] <Lunar_Lander> that is of the symphony of science
[21:08] <Lunar_Lander> "The Case for Mars"
[21:08] <Lunar_Lander> recommend to watch in HD :)
[21:08] <m1x10> :)
[21:08] <fsphil> http://www.youtube.com/watch?v=P6MOnehCOUw
[21:08] <fsphil> saw this on the bad astronomy site today
[21:11] <sbasuita> nice debunking there :)
[21:12] <Lunar_Lander> :D
[21:12] <Lunar_Lander> Carl Sagan rocks!"
[21:18] <m1x10> Lunar_Lander
[21:18] <m1x10> u know the mars odyssey ?
[21:19] <m1x10> a green musician along with the national british orchestra wrote music for nasa to accompany this mission
[21:19] <m1x10> the performance was done near athens
[21:19] <m1x10> http://www.youtube.com/watch?v=L_Tg0PaWaNM&feature=related
[21:20] <Lunar_Lander> yeah
[21:20] <Lunar_Lander> Vangelis did the music right?
[21:20] <m1x10> yea
[21:21] <Lunar_Lander> the Mythodea concert :)
[21:21] <m1x10> the work is called Mythodeia
[21:21] <Lunar_Lander> yaeh
[21:21] <m1x10> :)
[21:21] <m1x10> if you can hear the words
[21:21] <m1x10> you hear something like
[21:21] <m1x10> DIA ELA
[21:21] <m1x10> that means "zeus come back"
[21:22] <Lunar_Lander> yeah
[21:22] <Lunar_Lander> it has something spherical
[21:22] <Lunar_Lander> I mean the sound of the musci
[21:22] <Lunar_Lander> *music
[21:22] <m1x10> vangelis never said that the words have actual meaning
[21:22] <m1x10> he sais its cryptic
[21:23] <Lunar_Lander> yea
[21:23] <m1x10> but one anonymous user actually decoded the ancient greek phrases
[21:23] <m1x10> and gave a very scary meaning :P
[21:23] <Lunar_Lander> :D
[21:24] <m1x10> but still vangelis didnt accept it
[21:24] <m1x10> heh
[21:24] <m1x10> http://www.youtube.com/watch?v=3dgMAbWWIzA&feature=related
[21:24] <m1x10> this one for english
[21:24] <m1x10> in*
[21:25] <Lunar_Lander> cool :)
[21:25] <Lunar_Lander> brb
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[21:46] <Upu> Arduino question, I'm parsing the output of th GPS, I'm using strtod which is rounding up the value from the GPS data
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[21:46] <Upu> 5345.1513 is becoming 5345.15
[21:47] <DanielRichman> that would be rounding down
[21:47] <Upu> sorry yes down
[21:47] <DanielRichman> floating point is evil
[21:47] <DanielRichman> I guess there arn't enough bits in the float to represent those decimal places ?
[21:48] <Upu> should be I think
[21:48] <DanielRichman> or perhaps it's it's the conversion at the other end that is removing th e last two decimal places, are you using fprintf?
[21:48] <DanielRichman> snprintf?
[21:48] <Upu> no neither
[21:48] <Upu> well not directly
[21:48] <Upu> might be the library
[21:48] <DanielRichman> oh are you using that Arduino print thing where you can pass anything to it?
[21:48] <Upu> nope just #include <string.h>
[21:49] <DanielRichman> the reason I thought of it is because of the following comment from printf's manpage
[21:49] <DanielRichman> e, E The double argument is rounded and converted in the style
[21:49] <DanielRichman> [-]d.ddde±dd where there is one digit before the decimal-point
[21:49] <DanielRichman> character and the number of digits after it is equal to the pre
[21:49] <DanielRichman> cision; if the precision is missing, it is taken as 6;
[21:49] <DanielRichman> and your float has become such that it only has 6 digits in it
[21:50] <Upu> hmm
[21:50] <Upu> interesting
[21:50] <DanielRichman> there are a couple of options for converting doubles but the defalut is always six
[21:50] <DanielRichman> so what is your code, the bit that has converted that float into a readable form?
[21:51] <DanielRichman> also floats are evil and bloaty; it would be much easier if you just didn't use them
[21:51] <Upu> yeah just turning 5345.1513 into something useful
[21:53] <Upu> Cheers I'll go work something out
[21:58] <earthshine> randomskk you here?
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[22:41] <jcoxon> Upu, you could use the arduino gps library
[22:41] <jcoxon> tinyGPS
[22:41] <jcoxon> evening DanielRichman
[22:41] <DanielRichman> hi
[22:42] <Lunar_Lander> welcome back jcoxon
[22:42] <DanielRichman> how's it going jcoxon ?
[22:42] <jcoxon> good thanks - just had great thai food
[22:42] <jcoxon> was wondering what we were going to do about dl-fldigi and gps
[22:45] <DanielRichman> aah yes
[22:45] <DanielRichman> I have a testing branch
[22:45] <DanielRichman> with various mutilated and half completed code
[22:46] <jcoxon> hehe
[22:46] <jcoxon> serial ports are evil things
[22:46] <DanielRichman> I decided that the easiest x-platform way to do it is non blocking IO + pthread mutexes
[22:46] <DanielRichman> and a pipe (eww)
[22:46] <DanielRichman> so I can select() to wait on events from both the serial port and the UI
[22:46] <DanielRichman> I can't think of a better way to do it
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[22:48] <jcoxon> no idea :-p
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[22:49] <fsphil> DanielRichman, does the gps code really need to be threaded?
[22:49] <DanielRichman> what alternative do you propose?
[22:50] <fsphil> just do the serial processing in the main loop, for lack of a better term
[22:51] <fsphil> easy enough to poll the port, check if data is present
[22:51] <Upu> jcoxon thx :)
[22:51] <Upu> should have looked for library before spending a few hours messing about :)
[22:52] <jcoxon> i've got a modded version
[22:52] <jcoxon> which only uses GPGGA and also reports number of sats
[22:52] <jcoxon> its on my github
[22:52] <Upu> whats the link ?
[22:53] <DanielRichman> oh I see what you mean fsphil
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[22:53] <Upu> for github that is
[22:53] <fsphil> once you get a full gps string, process it
[22:54] <jcoxon> Upu, http://github.com/jamescoxon/Atlas-Flight-Computer
[22:54] <Upu> that's the bit I'm doing fsphil
[22:54] <fsphil> I've all that to look forward too soon Upu :)
[22:54] <Upu> Arduino likes rounding things to two decimal places
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[22:55] <Laurenceb> hi
[22:55] <Upu> hi
[22:55] <fsphil> hullo
[22:55] <jcoxon> fsphil, did you answer to questions (dl-fldigi and arduino) with one answer?
[22:55] <Upu> thx jcoxon appreciated I'll take a look at that tommorrow
[22:55] <fsphil> jcoxon, I think I did lol
[22:56] <jcoxon> two*
[22:56] <jcoxon> hehe
[22:56] <fsphil> the answer was for dl-fldigi
[22:56] <jcoxon> very impressibe
[22:56] <jcoxon> impressive*
[22:56] <Laurenceb> whats this?
[22:57] <jcoxon> answering two questions with one answer and both questioners being happy with the answer
[22:57] <fsphil> woo, my atu tuned my 70cm/2m magmount to the 20m band
[22:57] <jcoxon> fsphil, if you've got an atu we shoudl be testing your HF!
[22:57] <fsphil> jcoxon, I know - I'm making some changes to the packet format, and I need to make a TX window before I can
[22:58] <fsphil> hopefully this week
[22:58] <LazyLeopard> It may have tuned it, but how much of the signal actually makes it into the aether? ;)
[22:58] <Laurenceb> :P nvm
[22:58] <jcoxon> hehe okay - i won't disassmble my long wire just yet
[22:58] <jcoxon> yeah i recommend perhaps rigging a long wire instead :-p
[22:59] <fsphil> lol yea
[22:59] <jcoxon> roughly the right length and then use the atu
[22:59] <jcoxon> :-p
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[22:59] <fsphil> though I could try transmitting some rtty through this magmount, see if you can receive it :)
[22:59] <fsphil> I'm not receiving much though so the odds are not good
[23:02] <fsphil> I wonder which would be the better band
[23:02] <jcoxon> all depends really
[23:02] <fsphil> too wide a signal for 10m definitely
[23:02] <jcoxon> depends what time of day
[23:02] <fsphil> er, 30m even
[23:02] <Upu> night all
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[23:02] <jcoxon> 40m is pretty hardy
[23:03] <fsphil> tis
[23:03] <jcoxon> and full of mess
[23:03] <fsphil> it should handle mess fairly well, it's the fading that might trip it up
[23:03] <jcoxon> well i'm ready to go when you are
[23:03] <jcoxon> just need to plug in the wire :-p
[23:05] <fsphil> I'll put up the funky antenna I have here again tomorrow
[23:05] <fsphil> and make a few samples when I'm at work .. during lunch *ahem*
[23:06] <jcoxon> hehe fsphil i won't be around on tomorrow
[23:06] <jcoxon> got to go down to do some work
[23:06] <fsphil> typical lol
[23:06] <jcoxon> will be thurs/fri
[23:06] <jcoxon> perhaps best to postpone till we are properly setup
[23:07] <fsphil> aye, I might be able to use the new format too
[23:07] <jcoxon> yeah if we wait till then we can start off with plain CW, then RTTY, then new format
[23:07] <fsphil> yea
[23:09] <fsphil> even if only a few packets get through, I'll consider that a success :)
[23:09] <jcoxon> oh yeah
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[23:15] <jcoxon> i wish i had a use for this: http://www.seeedstudio.com/depot/36v-micro-hydro-generator-p-634.html?cPath=104_107&zenid=0e9d0b8766a0aae95fcb7f9ef19f456a
[23:16] <jcoxon> for some reason i think its really cool
[23:17] <Laurenceb> http://www.youtube.com/watch?v=H0TBZeCgL0E
[23:17] <Laurenceb> not as cool as that
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[23:20] <jcoxon> thats impressive attention to detail
[23:23] <Laurenceb> wish I hadnt sold my vacuum former
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[23:38] <natrium42> any launches?
[23:40] <Laurenceb> http://flyless.wikidot.com/hardware-hard-pcb
[23:40] <SpeedEvil> Tat's neat Laurenceb
[23:40] <Laurenceb> looks like my board :(
[23:40] <Laurenceb> they beat me
[23:41] <Laurenceb> tho lacks radio, smps, sd card, servo pwm in, rs485, pitot sensor and gps
[23:41] <natrium42> u got pwned
[23:43] <Laurenceb> they say no ground plane under the lsm303dhl...
[23:43] <Laurenceb> I'm not convinced a ground plane will block the magnetic field - surely its the same situation as skin depth
[23:44] <Laurenceb> so unless you're changing orientation crazy fast the thickness of copper on a pcb wont block the field
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[23:50] <Laurenceb> bbl
[00:00] --- Tue Jul 27 2010