[00:37] flowolf (n=flowolf@host254-234-dynamic.3-79-r.retail.telecomitalia.it) left irc: "Leaving"
[01:51] jgw (n=jgw@unaffiliated/jgw) got netsplit.
[01:51] jgw (n=jgw@unaffiliated/jgw) returned to #highaltitude.
[04:27] zeusbot joined #highaltitude.
[05:13] akawaka (n=akawaka@external.treyarch.com) left irc: Read error: 110 (Connection timed out)
[05:26] borism (n=boris@88-196-198-244-dsl.krw.estpak.ee) left irc: Read error: 145 (Connection timed out)
[06:59] borism (n=boris@ joined #highaltitude.
[07:20] jcoxon (n=jcoxon@host86-129-61-253.range86-129.btcentralplus.com) joined #highaltitude.
[07:35] jcoxon (n=jcoxon@host86-129-61-253.range86-129.btcentralplus.com) left irc: "Leaving"
[08:30] Simon-MPFH (n=simon@phantom.mpfh.co.uk) joined #highaltitude.
[08:49] MetaMorfoziS (n=khmhm@4d6f5419.adsl.enternet.hu) left irc: "Most akkor mit csinalt aki miert lepett ki?"
[09:08] flowolf (n=flowolf@host254-234-dynamic.3-79-r.retail.telecomitalia.it) joined #highaltitude.
[10:03] flowolf (n=flowolf@host254-234-dynamic.3-79-r.retail.telecomitalia.it) left irc: "Leaving"
[10:26] flowolf (n=flowolf@host58-81-dynamic.11-87-r.retail.telecomitalia.it) joined #highaltitude.
[11:12] Laurenceb (n=Laurence@fwnat-pub-1.physics.ox.ac.uk) joined #highaltitude.
[11:33] flowolf (n=flowolf@host58-81-dynamic.11-87-r.retail.telecomitalia.it) left irc: "Leaving"
[12:28] MetaMorfoziS (n=khmhm@4d6f5419.adsl.enternet.hu) joined #highaltitude.
[12:32] flowolf (n=flowolf@host254-234-dynamic.3-79-r.retail.telecomitalia.it) joined #highaltitude.
[14:09] Laurenceb (n=Laurence@fwnat-pub-1.physics.ox.ac.uk) left irc:
[14:31] Laurenceb (n=Laurence@fwnat-pub-1.physics.ox.ac.uk) joined #highaltitude.
[14:31] <Laurenceb> hi all
[14:31] <Laurenceb> is everyone on the mailing list?
[15:37] Laurenceb (n=Laurence@fwnat-pub-1.physics.ox.ac.uk) left irc:
[15:50] Laurenceb (n=Laurence@fwnat-pub-1.physics.ox.ac.uk) joined #highaltitude.
[15:50] <Laurenceb> hello again
[16:05] <Laurenceb> just tested the main cutdown
[16:05] <Laurenceb> works nicely
[16:16] <Laurenceb> http://wiki.ukhas.org.uk/projects:aerosol
[16:25] flowolf (n=flowolf@host254-234-dynamic.3-79-r.retail.telecomitalia.it) left irc: "Leaving"
[16:26] Laurenceb (n=Laurence@fwnat-pub-1.physics.ox.ac.uk) left irc:
[16:35] borism (n=boris@ left irc: Read error: 145 (Connection timed out)
[16:37] prpplague (n=dave@mail.americanmicrosystems.com) joined #highaltitude.
[16:39] Laurenceb (n=Laurence@fwnat-pub-1.physics.ox.ac.uk) joined #highaltitude.
[16:39] <prpplague> Laurenceb: greetings
[16:39] <Laurenceb> hello
[16:39] <prpplague> Laurenceb: how goes the project?
[16:39] <Laurenceb> http://wiki.ukhas.org.uk/projects:aerosol
[16:39] Action: prpplague looks
[16:39] <Laurenceb> just working in the lab atm
[16:40] <prpplague> Laurenceb: what are you using for the structure? foam?
[16:40] <Laurenceb> yes
[16:41] <Laurenceb> just tested the cutdown
[16:42] <prpplague> Laurenceb: nice
[16:42] <prpplague> Laurenceb: love the radio work
[16:42] <prpplague> Laurenceb: i wish i had more time to tinker with that
[16:43] <Laurenceb> I've sent the radio off to Rocketboy to take a look at
[16:43] <Laurenceb> I'm pretty sure it works, and there is a 2.5% timing error on my soundcard
[16:43] <Laurenceb> but its odd
[16:44] <Laurenceb> however, other than that it seems to work nicely
[16:44] <prpplague> Laurenceb: is that a cell phone inside there?
[16:44] <Laurenceb> yep
[16:44] <natrium42> Laurenceb, nice pictures
[16:44] <prpplague> Laurenceb: why not something like one of the telit modules? price?
[16:45] <Laurenceb> actually, a friend of mine has sold me a gsm module
[16:45] <Laurenceb> so we might fit it instead, but phones are cheap and easy
[16:46] <prpplague> ahh
[16:46] <Laurenceb> I spent most of the day fitting a new temperature sensor
[16:46] <prpplague> i just ordered some of the telit smd modules
[16:46] <Laurenceb> the lab tec who was helping me out fried the last one :9
[16:46] <prpplague> Laurenceb: http://www.sparkfun.com/commerce/product_info.php?products_id=8246
[16:46] <prpplague> Laurenceb: like that but from our OEM vendor
[16:47] <Laurenceb> ok
[16:47] <Laurenceb> http://wiki.ukhas.org.uk/_media/projects:dscn1017.jpg?cache=cache
[16:47] <Laurenceb> see the tube heading into the side at the lower left?
[16:47] Action: prpplague looks
[16:47] <Laurenceb> theres a hole cut out of the foam
[16:48] <prpplague> yep
[16:48] <Laurenceb> I had to thread a sensor into the grey plastic nipple on the end of the sampling tube
[16:48] <Laurenceb> which was fiddly to say the least
[16:49] <prpplague> hehe
[16:49] <Laurenceb> as most of the fixtures are fixed with epoxy, had to use thread to pull it in
[16:49] <prpplague> Laurenceb: you do most of your proto work with thru hole?
[16:50] <Laurenceb> yes
[16:50] <Laurenceb> but my sensors were 0.65mm pitch
[16:50] <Laurenceb> 6 pin ICs argggg
[16:50] <prpplague> Laurenceb: hehe .65mm is not bad, try doing 54 pins at .3mm hehe
[16:51] <prpplague> Laurenceb: the top proto pcb doesn't seem to be supported with a stand off on the top right side
[16:51] <Laurenceb> well it had to be done without a PCB
[16:51] <Laurenceb> no, that was a minor oversight with component placement :P
[16:51] <prpplague> Laurenceb: without PCB?
[16:52] <prpplague> Laurenceb: why is that?
[16:52] <prpplague> Laurenceb: not worried about the board bouncing and shorting against the post on the underside?
[16:52] <Laurenceb> the sensor had to sit in a 2mmx1x1.5 space
[16:52] <prpplague> Laurenceb: ahh
[16:52] <Laurenceb> its not that flexible
[16:53] <prpplague> Laurenceb: i think you would be surprised
[16:53] <Laurenceb> I milled out a space in the inside of the grey plastic nipple for the sensor to fit in
[16:53] Action: Laurenceb tried bending it
[16:53] <prpplague> Laurenceb: ahh interesting
[16:53] <Laurenceb> nah its going to crack by then
[16:53] <Laurenceb> and it will take about 1kg of load !
[16:54] <Laurenceb> its quite stiff material
[16:54] <prpplague> Laurenceb: hmm, looks like a failure point to me, but we over engineer stuff here for heavy drops
[16:54] <Laurenceb> hehe
[16:54] <Laurenceb> its not going into a rocket :p
[16:55] <Laurenceb> we need to know the temperature of the airflow to find the viscosity
[16:56] <Laurenceb> as the PWM control on the AVR uses the pressure across the big green filter
[16:56] <prpplague> Laurenceb: ahh
[16:56] <Laurenceb> so we can set a volumetric flow rate
[16:57] <prpplague> Laurenceb: which part are you using for the sensor?
[16:57] <Laurenceb> LM94022 for temperature
[16:57] Action: prpplague looks at the specs
[16:57] <Laurenceb> Honeywell 163PC01D75 pressure
[16:59] <prpplague> interesting
[16:59] <Laurenceb> the diff pressure sensor was expensive :9
[17:00] <Laurenceb> but I'm not paying for it :D
[17:00] <prpplague> Laurenceb: you using gs0/gs1 connected to ground?
[17:00] <Laurenceb> no, VDD
[17:01] <prpplague> Laurenceb: so three wires soldered to it?
[17:02] <Laurenceb> right, home time, I'll be online in an hour or so
[17:02] <Laurenceb> yes
[17:02] <Laurenceb> and a 2K5 resistor on the output
[17:02] <prpplague> Laurenceb: okie dokie later
[17:02] <Laurenceb> as I'm using a cap
[17:02] <Laurenceb> doh
[17:02] <Laurenceb> need to solder that on
[17:02] <prpplague> Laurenceb: but thats on the other end
[17:02] <Laurenceb> to the daughterboard
[17:02] <prpplague> Laurenceb: not in the tube
[17:02] <Laurenceb> yes
[17:02] <Laurenceb> anyway
[17:02] <prpplague> later
[17:02] <Laurenceb> cya later
[17:03] Laurenceb (n=Laurence@fwnat-pub-1.physics.ox.ac.uk) left irc:
[17:03] <natrium42> prpplague, are you into astronomy?
[17:04] <prpplague> natrium42: probably not on the level you are asking about
[17:04] <natrium42> well, i am just considering making an optical tracking station
[17:05] <prpplague> natrium42: interesting
[17:05] <prpplague> natrium42: mark a target and the scope follows the target?
[17:05] <natrium42> yep
[17:05] <natrium42> it may also be possible to use GPS data to calculate the direction of the target
[17:06] <natrium42> (can account for lag etc)
[17:06] <prpplague> interesting
[17:06] <prpplague> what video source would you use for image processing?
[17:06] <prpplague> web cam?
[17:07] <natrium42> ideally an HD cam
[17:07] <prpplague> just pointed at the sky or thru a scope?
[17:08] <natrium42> i havent made a calculation in that regard yet
[17:08] <natrium42> perhaps a telephoto lens would be sufficient
[17:08] <prpplague> natrium42: are we talking about following something like venus across the sky? or something much faster, say tracking a sat?
[17:08] <natrium42> no, tracking a balloon
[17:09] <prpplague> natrium42: ahhhhhhh
[17:09] <natrium42> though sat tracking would also be nice :)
[17:10] <prpplague> natrium42: actually, there is a good paper on this somewhere that i've seen before
[17:10] jcoxon (n=jcoxon@host86-129-61-253.range86-129.btcentralplus.com) joined #highaltitude.
[17:10] <natrium42> prpplague, cool, got the url handy?
[17:10] <natrium42> hey jcoxon
[17:10] <prpplague> natrium42: nasa spent alot of time developing these types of items to follow mission launches
[17:10] <prpplague> natrium42: sorry not handy, i think i might have it bookmarked at home
[17:10] <natrium42> mmkay
[17:11] <prpplague> natrium42: iirc, it consisted of two cameras
[17:11] <prpplague> natrium42: one being a wide field, the other narrow
[17:11] <natrium42> right
[17:11] <prpplague> natrium42: the wide field was used for primary tracking, the narrow was using for actual data
[17:13] <prpplague> natrium42: just did a quick look at some source code i have
[17:13] <prpplague> natrium42: http://sourceforge.net/projects/opencvlibrary/
[17:13] <prpplague> natrium42: does support dual image processing
[17:13] <prpplague> natrium42: looks like you could use that
[17:14] <prpplague> natrium42: just tracking a ballon via telephoto lens rather than a person or object at close range
[17:15] <natrium42> ah, neat
[17:15] <natrium42> looks useful for that
[17:17] <prpplague> natrium42: basically what you are looking at doing is a robot that instead of navigating using the motors/wheels , it is navigating using the motors/camera
[17:17] <prpplague> natrium42: completely doable
[17:17] <natrium42> yes, i was wondering whether i could use a regular motorized telescope mount
[17:18] <prpplague> natrium42: yea, you could use that without a problem, just need to determine what type of actual motors are in the device
[17:18] <natrium42> or maybe make my own mount
[17:18] <prpplague> natrium42: probably first run would be easiest to try COTS
[17:19] <natrium42> true
[17:19] <prpplague> natrium42: maybe get one of those small telescope kits from wal-mart that has automatic positioning
[17:19] <natrium42> i found a cheap mount for about $130 on ebay yesterday
[17:19] Action: prpplague is a big believer of prototyping on small scale with cheap parts
[17:20] <natrium42> but it seems to have a sticky alt axis judging from reviews
[17:20] <prpplague> natrium42: if it were me doing the project, and this is just me
[17:21] <prpplague> natrium42: i'd get one of those wal-mart specials, a web cam, and set it all up
[17:21] <prpplague> natrium42: get it where it would follow a tennis ball around in someones hands
[17:21] <prpplague> natrium42: once its working at that stage you can start working on the details for a more robust system
[17:22] <prpplague> natrium42: but again thats just me
[17:22] <natrium42> i was thinking about testing with airplanes
[17:22] <natrium42> since they fly over all the time
[17:22] <natrium42> :)
[17:22] <prpplague> natrium42: yea thats going to be tough to do on demand when you need to test
[17:22] <prpplague> natrium42: i'd say when it can follow a ball in someones hands, you'd be read to test on something else
[17:23] <prpplague> natrium42: hehe, but this is from a person who the boss complains about having too many pre-production designs before going to production, hehe
[17:23] <natrium42> i am not so worried about software -- it's the mechanics that appears hard
[17:24] <natrium42> hehe
[17:24] <prpplague> natrium42: yea, thats why i'd saying going cheap at first might give you a better idea of what you are up against
[17:24] flowolf (n=flowolf@host254-234-dynamic.3-79-r.retail.telecomitalia.it) joined #highaltitude.
[17:25] Akadecca (n=akawaka@cpe-76-173-152-142.socal.res.rr.com) joined #highaltitude.
[17:25] <prpplague> natrium42: interesting idea though
[17:27] <natrium42> if i get a dual-use device, i don't have to go cheap route first
[17:27] <natrium42> say a decent telescope
[17:27] <natrium42> with motorized mount
[17:27] <natrium42> :P
[17:29] Action: prpplague tends to destroy things when prototyping
[17:29] <natrium42> prpplague, here's the basic setup i am thinking about --> http://youtube.com/watch?v=oHg5SJYRHA0
[17:30] Action: prpplague looks
[17:32] <prpplague> rick&roll?
[17:33] <natrium42> you got rick rolled :D
[17:33] <natrium42> http://encyclopediadramatica.com/Rickroll
[17:33] Action: prpplague looks
[17:36] Action: prpplague shakes his head
[17:36] <jcoxon> hey guys
[17:36] <jcoxon> sorry was fixing our dishwasher
[17:37] <prpplague> jcoxon: greetings
[17:37] <prpplague> natrium42: http://www.walmart.com/catalog/product.do?product_id=6497741
[17:38] <natrium42> prpplague, that one doesn't have a motorized mount
[17:38] <natrium42> jcoxon, good to hear that you got the payload bacl
[17:38] <natrium42> *back
[17:38] <prpplague> natrium42: no but it does have the camera built in
[17:38] Laurenceb (n=Laurence@dhcp37-235.sthughs.ox.ac.uk) joined #highaltitude.
[17:39] <Laurenceb> hi again
[17:39] <prpplague> Laurenceb: greetings
[17:39] <prpplague> Laurenceb: don't suppose you have any close ups of how you soldered that temp sensor?
[17:39] <jcoxon> natrium42, yeah
[17:39] <Laurenceb> fraid not
[17:39] <jcoxon> it seems that the camera's shutter speed is too slow
[17:39] <Laurenceb> jcoxon: you found the payload?
[17:39] <jcoxon> so the pictures are blurred - i haven't seem them yet
[17:39] <jcoxon> Laurenceb, yup
[17:39] <Laurenceb> :D
[17:40] <jcoxon> ed has got it now
[17:40] <jcoxon> he collected it from a member of the public
[17:40] <Laurenceb> prpplague: I used ptfe insulated solid core
[17:40] <Laurenceb> jcoxon: cool stuff
[17:40] <prpplague> Laurenceb: yea i was i just curious about position and such
[17:40] <Laurenceb> prpplague: then bent it around the top to connect GS1 and 0, and VDD
[17:41] <Laurenceb> then used two more to connect to out and gnd, and soldered a couple of 0603 resistors onto the output line
[17:41] <Laurenceb> the airstream is ionised, so it was dipped in epoxy then put in heat shrink
[17:42] <natrium42> jcoxon, how well were you able to track it with binoculars?
[17:42] <natrium42> i am thinking about a motorized optical tracker
[17:42] <Laurenceb> theres also a bit of alpha radiation about from the thorium, but thats probably not an issue
[17:42] <jcoxon> natrium42, all the way to the top
[17:43] <prpplague> Laurenceb: so how well can it tell temp if its surrounded by all that?
[17:43] <natrium42> how far downrange did it go?
[17:43] <jcoxon> but it was a perfect day
[17:43] <jcoxon> not far
[17:43] <jcoxon> 15 miles
[17:43] <jcoxon> i'm not sure
[17:43] <natrium42> and what was the magnification on the binoculars?
[17:43] <jcoxon> that i'm not sure
[17:43] <Laurenceb> prpplague: the coating is only about 0.25mm thick
[17:43] <jcoxon> you'd have to ask ed he'll know
[17:44] <prpplague> Laurenceb: ahh interesting
[17:44] <natrium42> jcoxon, ok, thanks
[17:44] <Laurenceb> the heat shrink is on quite tight, the epoxy is there to fill in the gaps and provide stress relief
[17:44] borism (n=boris@195-50-207-158-dsl.krw.estpak.ee) joined #highaltitude.
[17:45] Action: prpplague goes to meeting
[17:45] <natrium42> epoxy heats up when curing and shriks heatshrink :P
[17:45] <Laurenceb> I worked under a microscope using adhesive sticky pads to hold things in place
[17:45] <Laurenceb> natrium42: not that much
[17:48] <Laurenceb> jcoxon: so the pics are a bit blurred?
[17:48] <jcoxon> apparently
[17:48] <jcoxon> i haven't seen them yet
[17:48] <Laurenceb> ok
[17:48] <jcoxon> we've had this problem before with this camera
[17:48] <Laurenceb> did you get the email I sent out?
[17:48] <jcoxon> its got great lenses but seems to have a slow shutter speed
[17:48] <jcoxon> yeah
[17:49] <Laurenceb> want to make a payload?
[17:49] <jcoxon> hehe
[17:49] <jcoxon> no
[17:49] <jcoxon> way too busy right now
[17:49] <Laurenceb> fairdos
[17:49] <Laurenceb> hopefully someone can make something
[17:50] <Laurenceb> it would be nice to have some photos
[17:50] <jcoxon> what do you need?
[17:50] <jcoxon> oh well
[17:50] <jcoxon> i have a camera on 555
[17:50] <jcoxon> but it might make blurred photos
[17:50] <Laurenceb> cool
[17:50] <jcoxon> a little annoying
[17:50] <jcoxon> as in its the same camera
[17:51] <Laurenceb> right
[17:51] <jcoxon> it was a seperate payload on firefly 2
[17:51] <Laurenceb> well if nothing else turns up, could we stick it on?
[17:51] <jcoxon> will check it out when i actually get the payload back
[17:51] <jcoxon> yeah sure
[17:51] <Laurenceb> how much does it weigh?
[17:51] <jcoxon> not sure
[17:51] <jcoxon> i made it over night
[17:51] <Laurenceb> lol
[17:54] <Laurenceb> I've got a gsm module in the post
[17:54] Akadecca (n=akawaka@cpe-76-173-152-142.socal.res.rr.com) left irc: Read error: 110 (Connection timed out)
[17:56] <Laurenceb> forgotten the model...
[17:57] <Laurenceb> its second hand, with a toner transfer etched breakout board
[18:04] flowolf (n=flowolf@host254-234-dynamic.3-79-r.retail.telecomitalia.it) left irc: "Leaving"
[18:05] <Laurenceb> the problem I've got at the moment is that the voltage convertor to the phone is powered by the phone, so it needs to be unplugged to avoid discharging the battery
[18:37] akawaka (n=akawaka@external.treyarch.com) joined #highaltitude.
[18:57] Hiena (n=Hiena@ joined #highaltitude.
[18:57] <Hiena> Good evening!
[18:58] <Laurenceb> hello Hiena
[18:59] <Hiena> Hi, Laurenceb ! How are you? Any news from the balloons?
[19:01] <Laurenceb> http://wiki.ukhas.org.uk/projects:aerosol
[19:01] <Laurenceb> I also did some work on the daughterboard code, its more or less ready now http://wiki.ukhas.org.uk/projects:daughterboard_code
[19:04] <Hiena> Looks neat.
[19:06] <Hiena> I found an iteresting site, when i looked some info for one of my green projects: http://www.flyingkettle.com/
[19:06] <Hiena> Steam as lifting gas.
[19:09] <akawaka> wouldn't hot air be more efficient?
[19:13] <Hiena> Nope. The steam has less density, and also it has higher temperature.
[19:17] <jcoxon> Hiena, we found firefly 2
[19:18] <Hiena> Cool.
[19:18] <Hiena> Somebody found it? Or you tracked down?
[19:18] <jcoxon> nah someone found it
[19:18] <jcoxon> edmoore picked it up
[19:19] <Hiena> Any damage?
[19:19] <jcoxon> not sure
[19:19] <jcoxon> edmoore got the picks off
[19:19] <jcoxon> he hasn't powered up teh payload
[19:19] <Hiena> Did you do onboard datalogging?
[19:20] <jcoxon> yeah
[19:20] <jcoxon> so we should be able to plot the route
[19:24] <Hiena> Cool. I'll be interested the wake up altitude of the gps.
[19:25] <jcoxon> i'd like to compare it to our forecasts
[19:25] <jcoxon> see how close we were
[19:28] <Hiena> I hopes, you will use a beacon on the next one.
[19:28] <jcoxon> :-p
[19:28] <jcoxon> Hiena, there was a beacon
[19:28] <jcoxon> but it was connected to the same power supply
[19:29] <akawaka> so the power supply failed?
[19:30] <jcoxon> i think so
[19:30] <jcoxon> transmission just died
[19:30] <jcoxon> mid cycle
[19:30] <jcoxon> but
[19:30] <jcoxon> it still appeared to cutdown which suggest that the radio was what lost power
[19:30] <jcoxon> will be able to tell when i get the payload back
[19:31] <Laurenceb> jcoxon: bad soldering?
[19:31] <jcoxon> might be that
[19:31] <jcoxon> could well be that
[19:31] <jcoxon> or molex cables
[19:31] <Laurenceb> those molex connectors have to be done carefully
[19:32] <Laurenceb> I use a load, but I was careful not to damage them
[19:32] <jcoxon> i've got a new plan now - 2 breakout boards, the flight one will be soldered directly to
[19:33] <jcoxon> the dev one will havev headers
[19:34] <Hiena> Oh, i forgot to say. At the high alt. projects, use the good old leaded solders, because the new, "green", lead free solders breaks under -40C
[19:34] <akawaka> good to know
[19:35] <akawaka> in your experience what temp has the payload electronics dropped down to?
[19:35] <jcoxon> its suprisingly hard to find lead solder me thinks
[19:35] Action: Laurenceb has lead solder
[19:36] <Hiena> Laurenceb, try to install some emergency beacon, with it's own PS.
[19:36] <Laurenceb> aka a phone
[19:37] <Hiena> Damn... Just got an idea, but i can't send you a schematic, because i thrashed it few months ago. It was a solar panel powered foxhunting beacon.
[19:39] <Hiena> Basically a 500mW fm transmitter with a uController, a capacitor, and a switching circuit. It's happily beeped ewery 45 seconds on a sunny day.
[19:40] <akawaka> how far was the landing site from anywhere you were looking?
[19:41] <jcoxon> akawaka, i'm not sure :-)
[19:41] <jcoxon> ed sorted it all out
[19:42] <jcoxon> Hiena, until it lands upside down
[19:42] <jcoxon> :-p
[19:44] <Laurenceb> I'm still keen on making a solar powered long duration balloon
[19:45] <Laurenceb> but I need to work out the radio system first
[19:45] <akawaka> i'd like that too
[19:45] <Laurenceb> its giving me a headache designing the reciver algorythm
[19:45] <Hiena> jcoxon, but it's more reliable than an average battery. Once we forgot one of such unit (the PCB was taped at the bottom of the panel) and four months later it's still happly beeped.
[19:46] <akawaka> i'd like to get a lot of data from a balloon like that though and thats tough with packet radio throughput
[19:46] <Laurenceb> yes, I plan to write new firmware for my radio module
[19:46] <Laurenceb> to do pread spectrum
[19:46] <jcoxon> akawaka, well once you've got a basic system you can expand loads
[19:47] <Laurenceb> (mild spread spectrum, ie 200Hz to 2Khz or so)
[19:47] <akawaka> you're still limited to low data rates though
[19:47] <akawaka> would be tough to get anything above 1200bps, right?
[19:47] <Laurenceb> yes, but its way more robust
[19:47] <Laurenceb> hmmm maybe 2400 would be possible
[19:48] <Laurenceb> but you may start to hit the limits of your reciever processor
[19:48] <Laurenceb> I'm not sure
[19:48] <Laurenceb> thats one of my problems, even for a 3GHz machine, all the 2D FFT drives it mad
[19:49] <akawaka> not sure i follow you
[19:49] <akawaka> packet radio can do 9600bps in software easily
[19:50] <Laurenceb> yes
[19:50] <Laurenceb> but not a software spread spectrum scheme unless its done carefully
[19:51] <akawaka> i see
[19:51] <akawaka> even a cdma scheme?
[19:51] Action: akawaka doesn't know much about radio
[19:51] <Laurenceb> this is cdma
[19:52] <Laurenceb> but normally its done in hardware
[19:52] <Laurenceb> I want to use a sound card, and a 2d FFT approach in SW
[19:52] <Laurenceb> searching in time/frequency space for a signal
[19:52] <Laurenceb> which is non trivial
[19:54] yansa_ (n=yans@host-89-167-37-237.pronet.lublin.pl) joined #highaltitude.
[19:55] yansa (n=yans@host-89-167-37-237.pronet.lublin.pl) left irc: Read error: 104 (Connection reset by peer)
[20:05] flowolf (n=flowolf@host254-234-dynamic.3-79-r.retail.telecomitalia.it) joined #highaltitude.
[20:20] mc- (n=mfcastle@cpc4-glfd1-0-0-cust538.glfd.cable.ntl.com) joined #highaltitude.
[20:24] <mc-> Laurenceb?
[20:27] <Laurenceb> hello
[20:28] <Laurenceb> how are you?
[20:32] <mc-> just sent you an email, doing good
[20:32] <mc-> I'm trying to get a dev kit for a STx module (cheap satcoms module)
[20:32] <Laurenceb> sweet
[20:33] <Laurenceb> did you get my email about the camera?
[20:33] <mc-> yes, I saw it.
[20:33] <mc-> please change the subject on my email...
[20:33] <Laurenceb> hehe
[20:33] <Laurenceb> sure, I can do that for you
[20:34] <mc-> thanks. They want to charge me $600 for a dev kit..
[20:34] <Laurenceb> ooh :(
[20:34] <Laurenceb> are you interested in making a camera payload?
[20:35] <mc-> I've got a really old camera here
[20:35] <mc-> which I've already connected to the shutter button
[20:35] <mc-> but don't have the time
[20:35] <Laurenceb> doesnt matter
[20:35] <Laurenceb> neither do we :(
[20:35] <mc-> maybe jatkins would be interested
[20:35] <Laurenceb> yes, my thought
[20:36] <Laurenceb> right, I'm thinking of heading off to maccy d's
[20:37] <Laurenceb> being a bazy lastard
[20:37] <mc-> pls send me email off first...
[20:37] <mc-> as they are in the US
[20:37] <Laurenceb> ok sure
[20:37] <Laurenceb> ah right got you
[20:37] <mc-> they might reply today
[20:38] <Laurenceb> "STx module inquirey"
[20:38] <Laurenceb> is that even spelt right?
[20:38] <prpplague> mc-: Stx?
[20:38] <mc-> yes, err inquiry
[20:38] <prpplague> mc-: url?
[20:38] <mc-> www.sensservice.com
[20:39] <mc-> http://www.sensservice.com/sens/products/stx2
[20:39] <prpplague> ohhhh nice
[20:39] <Laurenceb> sent
[20:39] <prpplague> holy cow $99
[20:40] <mc-> are you meaning it's expensive? sounds cheap to me.
[20:40] <prpplague> cheap
[20:41] Action: Laurenceb heads off to eat cheap junk food
[20:41] Action: prpplague sends a request to purchasing to see about a dev kit
[20:41] <Laurenceb> bbl
[20:42] <mc-> where are you prpplague?
[20:42] <prpplague> i'm located in dallas texas
[20:42] <mc-> are you a student?
[20:42] <prpplague> hehe, not for 20+ years, hehe
[20:43] <mc-> can you ask for an academic discount or some other excuse?
[20:43] <mc-> dev kit is $600
[20:43] <mc-> or ask for a manual?
[20:44] <mc-> no need for a dev kit, but they won't give out the manual
[20:44] jcoxon_ (n=jcoxon@host86-129-61-253.range86-129.btcentralplus.com) joined #highaltitude.
[20:45] <prpplague> mc-: no, just get the purchasing department to grab a kit for eval
[20:45] <prpplague> mc-: we have a good r&d budget
[20:45] <mc-> great...can you send me the manual please?
[20:45] <mc-> a copy..
[20:46] <prpplague> mc-: if/when i get one and its not covered under NDA sure
[20:46] <mc-> that would be great..thanks.
[20:48] <mc-> it would be covered under NDA, but I'll need to sign an NDA with them anyway.
[20:49] jcoxon_ (n=jcoxon@host86-129-61-253.range86-129.btcentralplus.com) left irc: Client Quit
[20:51] flowolf (n=flowolf@host254-234-dynamic.3-79-r.retail.telecomitalia.it) left irc: "Leaving"
[20:51] flowolf (n=flowolf@ joined #highaltitude.
[20:55] jcoxon (n=jcoxon@host86-129-61-253.range86-129.btcentralplus.com) left irc: Read error: 110 (Connection timed out)
[21:19] mc- (n=mfcastle@cpc4-glfd1-0-0-cust538.glfd.cable.ntl.com) left irc:
[21:28] Action: Laurenceb is back
[21:31] Simon-MPFH (n=simon@phantom.mpfh.co.uk) left irc: "Leaving"
[21:36] <Laurenceb> hmm cool http://www.youtube.com/watch?v=oEchXbi6y6g&feature=related
[21:36] <Laurenceb> t610 is nice, for only £20 on ebay :P
[21:44] <Laurenceb> even better, you can run java programs on it :P
[21:45] <Laurenceb> I'm thinking it might be possible to make a t610 payload!
[21:47] <Laurenceb> bah you cant acess the camera :(
[21:50] jcoxon (n=jcoxon@host86-129-61-253.range86-129.btcentralplus.com) joined #highaltitude.
[22:05] <Laurenceb> hey there
[22:05] <natrium42> where's edmoore?
[22:05] <Laurenceb> my mum crashed her car :(
[22:06] <natrium42> how? it's not serious is it?
[22:06] <prpplague> natrium42: he was getting to close to finding out about aliens visiting earth and the FBI came and got him
[22:06] <prpplague> Laurenceb: oh no
[22:06] <prpplague> Laurenceb: bad?
[22:06] <Laurenceb> everyones ok
[22:06] <prpplague> ahh
[22:06] <natrium42> good
[22:06] <Laurenceb> apart from the car :S
[22:06] <Laurenceb> the radiators damaged
[22:07] <Hiena> Always the radiators...
[22:07] <Laurenceb> and the power steering is being screwy
[22:08] <Hiena> Nice. Sounds like a nice bill.
[22:10] <Laurenceb> looks like the handbrake went
[22:12] <Laurenceb> its rolled into a bollard
[22:15] <Laurenceb> and only has 3rd party insurance :(
[22:16] <Hiena> BTW, if here is any eco friendly steam engineers. here, i would appreciate some help. ;)
[22:20] <Laurenceb> looks like someone went into the back and knocked it
[22:21] <Hiena> Laurenceb, what was the cause of the accident?
[22:22] <Laurenceb> looks like the handbrake was being dodgy
[22:22] <Laurenceb> and someone hit it from behind
[22:22] <Laurenceb> knocking it down a hill
[22:23] <Laurenceb> very lucky noone was injured
[22:26] <Laurenceb> but thats about three grand worth of damage by the look of it
[22:37] <Hiena> Guess it will be more. If the power steering died, it will be more.
[22:38] <Laurenceb> the suspension is damaged, and the chassi is crushed
[22:39] <Laurenceb> probably a write off
[22:48] <Hiena> Jup.
[22:50] Laurenceb1 (i=Laurence@dhcp37-235.sthughs.ox.ac.uk) joined #highaltitude.
[22:50] prpplague (n=dave@mail.americanmicrosystems.com) left irc: "Leaving"
[23:03] Laurenceb (n=Laurence@dhcp37-235.sthughs.ox.ac.uk) left irc: Read error: 110 (Connection timed out)
[23:04] Nick change: Laurenceb1 -> Laurenceb
[23:06] flowolf (n=flowolf@ left irc: "Leaving"
[23:11] flowolf (n=flowolf@host254-234-dynamic.3-79-r.retail.telecomitalia.it) joined #highaltitude.
[23:14] Hiena (n=Hiena@ left irc: "-=Alkoholmentes-sör és repülõgép-szimulátor, biztos út a guminõ felé=-"
[23:56] Laurenceb (i=Laurence@dhcp37-235.sthughs.ox.ac.uk) left irc: Read error: 110 (Connection timed out)
[00:00] --- Sat Mar 1 2008