highaltitude.log.20130519

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[01:25] <arko> i really need 3 screeens
[01:25] <nigelvh> That's a slippery slope my friend.
[01:26] <arko> i need 4 screens
[01:26] <nigelvh> And thus my prophecy has been fufilled.
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[05:18] <heathkid> how do you determine the size of the parachute (or Spherachute) needed?
[05:18] <heathkid> planning a Kaymont 600 to burst with a 250g payload
[05:19] <Randomskk> http://ukhas.org.uk/guides:parachute_sizing_chart
[05:21] <heathkid> so a 0.3 to 0.4m parachute?
[05:21] <heathkid> not sure what they mean by slow and fast descent
[05:22] <Randomskk> you want to be within slow to fast
[05:22] <Randomskk> roughly speaking
[05:23] <heathkid> so from that chart... a 0.5m parachute would be perfect for a 250g payload?
[05:23] <Randomskk> sure, or 0.6m
[05:23] <heathkid> thanks!
[05:25] <heathkid> so a 24" Spherachute would be correct?
[05:26] <Randomskk> yea, seems reasonable
[05:26] <heathkid> hmmm... when doing my calculations I was considering the parachute as part of the payload weight
[05:26] <Randomskk> shouldn't affect matters much
[05:26] <heathkid> guess I need to rethink that. :)
[05:26] <Randomskk> it is, for the purposes of lift etc
[05:26] <Randomskk> and burst altitude
[05:27] <Randomskk> only really makes any odds with the 250g figure for choosing a parachute, but that's not really going to change things significantly for you
[05:27] <heathkid> right... but I don't want a fast ascent to burst (102 minutes) to take 6 hours to get back on the ground. :)
[05:27] <Randomskk> sure
[05:28] <heathkid> running on one AA Lithium I can get 13 hours of TX time...
[05:28] <heathkid> of course at this point to hit 250 grams I'd have to add ballast
[05:28] <heathkid> :)
[05:29] <heathkid> or more sensors
[05:31] <heathkid> right now with the tracker, battery, keychain HD camera, AND parachute I'm still coming in at under 70g
[05:32] <heathkid> might need a smaller balloon... the Kaymont 600 seems a bit WAY overkill...
[05:32] <heathkid> how many balloons am I going to buy before I actually launch one? :)
[05:33] <heathkid> I know... probably at least three more
[05:33] <heathkid> getting a nice selection tough
[05:39] <Randomskk> nothing wrong with having a nice light payload
[05:39] <Randomskk> don't forget to put it in a good insulating box
[05:40] <heathkid> yeah... I looked at some stuff at Home Depot today and couldn't decide what to get
[05:41] <heathkid> when I do figure that part out I'll be testing it in a high altitude chamber to >100k ft. and also in an environmental chamber down to -55C
[05:41] <heathkid> before I launch the payload
[05:42] <Randomskk> that's a lot of testing
[05:42] <heathkid> eh... it'd be fun too
[05:42] <heathkid> gives me a reason to learn how to use our high altitude chamber. :)
[05:43] <heathkid> the sub-zero chamber I know... but need to make sure it's not in use
[05:43] <heathkid> well... one of them
[05:43] <heathkid> but we just replaced all the seals on the high altitude chamber and I'm interested in seeing how it performs.
[05:44] <Randomskk> sounds good
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[05:49] <heathkid> this is an incredible article... first time I've seen it... should be linked to in the topic! :) http://science.nasa.gov/science-news/science-at-nasa/2012/19apr_camilla/
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[06:07] <heathkid> this sucks...
[06:08] <heathkid> my tracker works great with one AA lithium... but can't get it to TX properly with one AAA
[06:08] <heathkid> HX-1 drawing too much current? I tried adding a photocap to the battery supply but that didn't work... and the cap weighs more than using a single AA lithium anyway...
[06:10] <heathkid> everyone fall asleep?
[06:11] <Randomskk> it's like 7am uk time
[06:11] <Randomskk> you hang out here at all the wrong hours :P
[06:11] <heathkid> lol... yeah... I know
[06:12] <heathkid> but I'm not in the UK
[06:12] Action: daveake is still asleep
[06:13] <heathkid> dreaming of 120k ft. balloon launches and 1080P HD video shots!
[06:13] Action: arko is still awake
[06:13] Action: heathkid is in-between
[06:13] <heathkid> and wasted $10 on AAA's
[06:13] <heathkid> heh
[06:14] <heathkid> make that $13.50 including the battery holder
[06:14] <heathkid> no... $11.50
[06:17] <heathkid> why kind of styrofoam do you guys use to build the payload insulating container?
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[06:17] <daveake> XPS
[06:17] <heathkid> XPS?
[06:18] <daveake> Extruded rather than expanded
[06:18] <daveake> Sold as insulation sheets for housing
[06:18] <heathkid> I saw that pink board at Home Depot
[06:18] <daveake> Cut with a knife - doesn't need a hot-wire cutter
[06:18] <daveake> And much much much less mess
[06:19] <daveake> Weighs a tad more than the white stuff, but is stronger
[06:19] <heathkid> I still don't know what it is...
[06:19] <daveake> Personally I only use the white stuff in pre-made balls
[06:19] <daveake> Comes in pink and blue depending on who makes it
[06:19] <heathkid> ah
[06:20] <heathkid> so that pink board is probably what I do need?
[06:20] <heathkid> very high density
[06:20] <daveake> The blue seems a bit stronger to me but I don't know for sure as my blue sheets are thicker
[06:20] <heathkid> doesn't even really look like foam but is very lightweight
[06:20] <daveake> sounds like it
[06:21] <daveake> I use 10mm thick mainly, which is about 3/8" in your money
[06:21] <heathkid> brb.... kids are waking up wife...
[06:21] <daveake> And just cut with a sharp craft knife
[06:25] <heathkid> I'll try to get some tomorrow...
[06:25] <heathkid> but seems I have too large a balloon and too large of a parachute
[06:25] <heathkid> or I add some lead weights to it
[06:25] <daveake> too large for why?
[06:25] <heathkid> my payload doesn't weigh enough
[06:25] <daveake> (balloon)
[06:26] <daveake> So?
[06:26] <heathkid> I want fast ascent to burst for first launch (no problem obviously)...
[06:26] <daveake> why?
[06:26] <heathkid> so I don't have to drive too far to recover it
[06:27] <daveake> Just aim for 5/ms. Unless there's a particular reason for going faster (e.g. you're risking landing in the sea)
[06:27] <daveake> oh purleaze :)
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[06:27] <daveake> It's summer, allegedly, it probably won't be far
[06:27] <heathkid> I have the calculations for 5/ms
[06:27] <heathkid> 5m/s
[06:27] <heathkid> says I need a 225g payload
[06:28] <heathkid> for my Kaymont 600
[06:28] <daveake> And your payload weighs what ?
[06:28] <heathkid> right now I'd be lucky to have 1/4 that weight
[06:28] <heathkid> not sure without the styrofoam... but <100g
[06:29] <heathkid> maybe a lot less
[06:29] <daveake> OK, so that's about 32km which is very very normal
[06:30] <heathkid> so should I stick to the Kaymont 600 or get a smaller balloon?
[06:30] <daveake> I see no problem with that at all
[06:31] <heathkid> ok
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[06:31] <daveake> The only times I've gone for much more than 5m/s, by using a smaller balloon and/or more gas than I would for 5m/s, has been where the prediction is for a landing spot too close to the sea or somewhere else I don't want to land (an MOD place)
[06:31] <heathkid> MOD?
[06:31] <daveake> Ministry Of Defence
[06:31] <heathkid> ah
[06:31] <daveake> Army etc
[06:32] <daveake> No, what size chute have you got?
[06:32] <daveake> Now
[06:32] <heathkid> right now... too large (36")
[06:32] <daveake> ok that is too large :)
[06:33] <daveake> Don't have to calculate that one to know :)
[06:33] <daveake> 100g is going to be about 18"
[06:33] <heathkid> going to order a 18" and a 24" Spherachute w/ HAB attachment
[06:33] <daveake> 18" should be fine might still land a tad slower than 5m/s but fine anyway
[06:34] <daveake> I've seen a 60g payload fly with a parachute I can only describe as "a handkerchief"
[06:35] <daveake> 100g with a sphereachute would be about 16", if they made one. 18" will be fine.
[06:36] <daveake> Swap your AAA for an AA that'll help :)
[06:37] <heathkid> :)
[06:37] <heathkid> add some steel shot for ballast too.... lol
[06:37] <heathkid> or extra batteries
[06:38] <heathkid> weird problem to have.... my payload is too light
[06:38] <heathkid> :)
[06:38] <daveake> Well, it isn't :)
[06:39] <heathkid> well... now that I know the tracker works... I just need to get a smaller parachute and some gas...
[06:39] <daveake> yup
[06:39] <heathkid> or no parachute and a streamer
[06:40] <heathkid> I can test my payload up to a 600g impact
[06:40] <heathkid> :P
[06:40] <Upu> morning
[06:40] <heathkid> just kidding... I wouldn't do that... that'd be dangerous
[06:40] <heathkid> hello Upu
[06:40] <daveake> morning
[06:41] <heathkid> err... 600G impact
[06:41] <heathkid> shock table
[06:41] <heathkid> though I haven't done anything higher than about 25G's
[06:42] <heathkid> and that's a 2-ton table dropping with zero bounce... for a 1/2 sine pulse
[06:42] <griffonbot> Received email: chris G7OGX "[UKHAS] Re: Launch Announcement - STRATODEAN Two - 18/05/13
[06:52] <heathkid> I hate living in the wrong time zone
[06:53] <heathkid> another question... without a cutdown, do I want the parachute between the payload and the balloon or hanging off the side of the payload?
[06:53] <daveake> former
[06:54] <heathkid> payload --> paraschute -->> balloon?
[06:54] <daveake> yep
[06:54] <heathkid> what if it doesn't burst? it just helps act as a streamer?
[06:54] <daveake> It'll burst
[06:54] <heathkid> ok
[06:55] <heathkid> I'll be using 50 lb. test fishing line... length between payload, paraschute, and balloon?
[06:55] <heathkid> 10 ft each enough?
[06:55] <daveake> But yeah sometimes you get a lot of latex coming back down, but it does act as a streamer and it probably won't change the descent rate much
[06:56] <daveake> Sometimes it rips rather than bursts into bits. One of Upu's it formed a parachute shape and came down reeeeally slowly
[06:56] <daveake> That's very unusual though and AFAIK has only happened with larger balloons
[06:56] <heathkid> I need to get a couple cut-downs working...
[06:57] <daveake> Normally I go for 5 metres (yards) between balloon and chute, and double that between chute and payload
[06:57] <heathkid> well.... guess I need to order a smaller Spherachute w/ HAB attachment and get some gas...
[06:57] <daveake> First launch? I wouldn't bother with a cutdown
[06:57] <heathkid> not planning it for first launch
[06:57] <daveake> ok
[06:59] <heathkid> great info on the lengths daveake
[06:59] <heathkid> thanks
[07:00] <heathkid> why does Spherachutes want to know a Color Choice?
[07:02] <daveake> Because pink works best?
[07:02] <heathkid> lol
[07:02] <daveake> You want something easy to see, of course
[07:02] <heathkid> red/white?
[07:02] <heathkid> orange/green?
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[07:03] <daveake> Up to you. Mine are all lime/orange I think
[07:03] <heathkid> purple/black?
[07:03] <heathkid> is that the default if I don't enter anything?
[07:03] <daveake> No idea
[07:04] <daveake> Mostly you want to be able to see the thing after it lands, so choose something that will be easy to see wherever you think it might land
[07:06] <heathkid> I'll go for red/white
[07:08] <heathkid> Okay... have an 18" and a 24" on the way with the "Weather Balloon Attachments"
[07:09] <heathkid> how much gas does it take to inflate a Kaymont 600?
[07:11] <x-f> ~1.4 m^3
[07:11] <x-f> heathkid, http://habhub.org/calc/
[07:13] <heathkid> Volume: 1.56 m
[07:13] <heathkid> 3
[07:13] <heathkid> 1558 L55.0 ft
[07:13] <heathkid> 3
[07:14] <heathkid> that means nothing to me
[07:14] <heathkid> how big of a tank?
[07:14] <heathkid> for 1558 L?
[07:14] <heathkid> seems like a lot
[07:14] <Randomskk> it compresses quite well
[07:15] <heathkid> so a full size tank or ???
[07:15] <Randomskk> go on the volume, canisters of helium should be quoted at volume of gas at standard conditions
[07:15] <heathkid> 1.56m^3
[07:16] <daveake> heathkid The gas rental place will know the volume of gas for each cylinder size
[07:16] <daveake> That siad, the first convo normally goes ... "How many balloons do you need to fill?" ... "Just the one"
[07:17] <heathkid> well... I've got the Kaymont 600 and a 1200
[07:18] <daveake> As Randomskk said just use the calculator then go and order whatever cylinder gives you enough gas
[07:18] <heathkid> sounds good
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[07:18] <heathkid> you have no idea (or maybe you do) how badly I want to get a balloon up in the air... to burst altitude AND recover the payload! :)
[07:19] <daveake> I think we all do
[07:20] <heathkid> I just feel like I keep asking stupid questions... but I don't have a group around here and I'm on my own except you folks...
[07:20] <heathkid> so thank you for putting up with me
[07:21] <heathkid> and my wife just doesn't understand... sees no point in it at all... "waste of time and $$$"
[07:21] <daveake> Most people over here work on their HAB projects alone.
[07:22] <heathkid> but at some point it does get to be a bit like rocket science with at touch of magic thrown in...
[07:22] <daveake> Ah, well, wives vary :p. Mine probably thought like yours at the start, but she now really enjoys coming out on the chases
[07:23] <heathkid> well... if I ever told her we need to chase it because I just launched several hundered dollars worth of electronics up into the stratosphere that she didn't know I paid for... well...
[07:23] <heathkid> :P I might be very alone
[07:24] <daveake> Several $100?
[07:24] <heathkid> uh... yeah... APRS is more expensive than RTTY
[07:24] <daveake> Here they're typically less than $100
[07:24] <daveake> sure
[07:24] <heathkid> but I get 300mW
[07:24] <heathkid> :)
[07:25] <daveake> <shrugs>
[07:25] <daveake> We do fine with our measly 10mW :)
[07:25] <heathkid> I'd love to do some RTTY... next on my list
[07:25] <heathkid> this is what I have now... been working on the board for a while
[07:25] <heathkid> it is what it is
[07:26] <heathkid> though I still think the chip antenna for the uBlox-6 works better than the Serantel helical
[07:26] <daveake> I think it's what makes the hobby here, tbh. Gets everyone involved, much more so than APRS
[07:26] <heathkid> and RTTY is so simple... but so difficult too
[07:26] <daveake> easy peasy
[07:27] <daveake> anyway gotta go I'm out most of today
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[07:27] <heathkid> okay... thanks for all the info and support...
[07:27] <heathkid> talk to you later
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[07:49] <Upu> morning Radim
[07:49] <Upu> get it back again last night ?
[07:50] <Darkside> http://i.imgur.com/zMt7pPV.jpg
[07:51] <Upu> the sky its on fire
[07:52] <Darkside> yus
[07:54] <arko> Wow
[07:54] <arko> Thats pretty amazing
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[08:12] <fsphil> I thought they stopped doing nuclear tests down there Darkside
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[08:29] <jarod> http://x264.nl/dump/87.5-108.0/87.5mhz-2013-05-18-0827utc-dynamis.jpg 1500KM @ 15 KW (recording running) :D
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[08:35] <jarod> bertrik
[08:35] <jarod> http://x264.nl/dump/87.5-108.0/87.5mhz-2013-05-18-0827utc-dynamis.jpg 1500KM @ 15 KW (recording running) :D
[08:36] <bertrik> jarod: hmm?
[08:37] <jarod> just got a station on FM, 1500kw away :P
[08:37] <bertrik> nice
[08:38] <bertrik> jarod: with RDS even
[08:38] <fsphil> I get some scottish stations occasionally, about 600km
[08:40] <jarod> bertrik yup! :D fsphil cool :D
[08:40] <jarod> anyways... some more zzzs :)
[08:40] <jarod> laters
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[09:02] <griffonbot> Received email: Geoff Mather "[UKHAS] Re: Launch Announcement - STRATODEAN Two - 18/05/13
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[10:24] <griffonbot> Received email: STRATODEAN "[UKHAS] Re: Launch Announcement - STRATODEAN Two - 18/05/13
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[12:08] <Gadget-Mac> Upu: GPS works flawlessly, just need PPS in the kernel
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[12:16] <Upu> super Gadget-Mac
[12:17] <eroomde> Y U need PPS in the kernel Gadget-Mac ?
[12:17] <eroomde> also why did john hurt randomly appear as the doctor
[12:17] <eroomde> also, is it worth watching the new star trek in 3d?
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[12:21] <Upu> I think he's using for a time source eroomde
[12:24] <mattbrejza> not sure its worth seeing anything in 3D
[12:25] <eroomde> well possibly
[12:25] <mattbrejza> especially with the shitty realD classes
[12:25] <mattbrejza> *glasses
[12:25] <eroomde> but something like avatar, designed for it, is a good exposition
[12:26] <mattbrejza> i dont think star trek was filmed in 3D though
[12:26] <mattbrejza> all the cgi stuff might have been though
[12:28] <Upu> I'll always choose the 2D option
[12:28] <Upu> just doesn't enhance the experience
[12:28] <Upu> if you want 3D go outside
[12:29] <mattbrejza> the uni cinema now has shutter glasses 3D, and thats supposed to be much better
[12:30] Nick change: uwe__ -> uwe_
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[12:33] <eroomde> uwe_: your name rings a bell...
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[12:34] <eroomde> openocd?
[12:34] <uwe_> dunno :)
[12:35] <uwe_> I made a few patches for that, yeah, but not really involved there directly
[12:35] <uwe_> these days I'm working on sigrok.org mostly
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[12:39] <eroomde> uwe_: that looks very interesting
[12:41] <jdtanner> Afternoon everyone.
[12:42] <eroomde> i think i possibly recognised your name from summon or libopenstm32
[12:42] <eroomde> or the intersection of those two things
[12:42] <uwe_> ah, that too yeah
[12:42] <uwe_> haven't been able to spend much time on those either though, lately
[12:43] <eroomde> such is life
[12:43] <eroomde> so what is the aim of sigrok?
[12:44] <eroomde> a sort of common api for talking to test equipment?
[12:45] <uwe_> pretty much yeah. opensource libraries for getting data from test gear, configuring it and so on, plus protocol decoders (SPI, I2C, whatever) for the logic analyzer case.
[12:45] <uwe_> since it's all libraries, various GUI or command-line clients can be made by anyone
[12:45] <eroomde> nice
[12:45] <uwe_> we started with logic analyzers, but as of today also MSOs, scopes, DMMs, etc. are supported
[12:45] <eroomde> i would have a lot of uses for such a thing
[12:46] <uwe_> we also plan support for function generators and other stuff later
[12:46] <uwe_> great :) feel free to join #sigrok
[12:46] <eroomde> if i could, with an ipython script, get the magnititude and phase response of a system to a sweapt sine, that would improve my life a lot
[12:47] <eroomde> i know i can get individual boxes that will produce a transfer fuction, but i shouldn;t need to buy that, i should just be able to use my pre-existing function generator and pre-existing scope and so on
[12:47] <eroomde> but not in a very tedious and manual way
[12:47] <eroomde> s/ipython/python. but really from within ipython to experiment with controller tuning interactively
[12:48] <uwe_> there is some initial python bindings for libsigrok, that should be very useful for lots of "quick test" frontends. I did a 20-linesofcode GUI for multimeters in python with that (plus pygtk or such)
[12:48] <Gadget-Mac> eroomde, Upu is correct, want to use ublox GPS with a RaspberryPi as a time source, hence needing PPS.
[12:48] <eroomde> right
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[13:23] <Tommo_> Hi have any of you guys come across this error message Arduino R3.... avrdude.exe: stk500_getsync(): not in sync: resp=0x00
[13:24] <eroomde> got the right comm port Tommo_ ?
[13:25] <Tommo_> Ive been using it for a while now with absolutely no problems, now I cant even load the blink sketch
[13:26] <eroomde> yes, avrdude can't see a device where it thinks there should be one
[13:26] <eroomde> avrdude is a bit of open source software that puts code on avr chips. arduino is built ontop of it
[13:27] <eroomde> but see my question above
[13:27] <Tommo_> I just checked my com ports a yes its seeinf the correct one
[13:28] <eroomde> are the tx and rx LEDs flashing when you try to program the device?
[13:28] <Tommo_> Ill just check
[13:29] <Tommo_> wtf...its working now
[13:30] <eroomde> maybe tweaking the serial ports helped
[13:30] <eroomde> i have heard that windows can sometimes randomly reassign which comm port a device is connected to
[13:31] <Tommo_> I looked into the serial port and com 3 was highlighted
[13:31] <Tommo_> hey whatever it was im a happy bunny now
[13:31] <Tommo_> led on 1 second off 1 second
[13:32] <eroomde> great
[13:36] <Tommo_> Random.. I Googled and it said somewhere I might have to Flash the 16U chip..... Blimey what's the chip done to deserve that?
[13:36] <eroomde> sometimes you just can't help yourself
[13:36] <Tommo_> lol you know!!
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[13:37] <Laurenceb__> i like to flash chips all day long
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[13:55] <SuiG> Hello, I am planning a balloon launch and have worked out my payload which comes to 1183g - how do I work out which balloon and how much helium I will need? Thank you.
[13:56] <Upu> hey SuiG
[13:56] <Upu> http://habhub.org/calc/
[13:57] <Upu> aim for 5.5m/s ascent rate
[14:02] <SuiG> Hello, thanks for replying. Just checking out the link.
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[14:09] <SuiG> It says on the link that my payload mass needs to include the parachute, which mine doesn't - how do I work out the correct parachute?
[14:12] <x-f> SuiG, take a look here - http://ukhas.org.uk/guides:parachute_sizing_chart
[14:13] <eroomde> or calculate it directly...
[14:14] <eroomde> https://groups.google.com/d/msg/ukhas/giEVDwTUJ6I/sgOUw_4FqaAJ
[14:15] <eroomde> SuiG: the context is that there was a recent mailing list dicussion on parachutes and calcuating descent rate
[14:16] <eroomde> and that (in my opinion) one shouldn't really trust things like the graph on the wiki in any more than a rough first approximate pass for descent rate
[14:16] <eroomde> i say 'in my opinion', I hope i justified it too
[14:19] <SuiG> Thanks for that - very new to this so its a lot to get my head around...my payload of 1183g seems huge
[14:20] <eroomde> i'd conservativwely add 150-200g mass for chutes and rigging
[14:20] <eroomde> for a 1kg payload
[14:20] <eroomde> 1kg isn;t massively heavy
[14:20] <eroomde> don;t fret
[14:20] <eroomde> it's heavy if you just want to fly a minimum weight tracker
[14:21] <eroomde> but if you start adding interesting bits and bobs like cameras and experiments, you can quickly get to 1kg
[14:21] <eroomde> just make sure it's free from spikey bits
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[14:25] <SuiG> I'm at school, so we want to include sensors for temperature, pressure, cosmic rays etc. I have ordered two cameras to put on either side of the payload, would one be sufficient?
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[14:25] <eroomde> one would be sufficient, two would be more awesome
[14:25] <eroomde> stick with two
[14:25] <eroomde> honestly, you're not particularly heavy
[14:26] <eroomde> i think our guidlines say stay under 2kg
[14:26] <eroomde> but a lot of us have launched heavier things than that
[14:30] <SuiG> okay, will do. Thank you.
[14:31] <Laurenceb_> http://www.amazon.co.uk/Making-Starships-Stargates-Interstellar-Exploration/dp/1461456223
[14:31] <Laurenceb_> lolwut
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[15:03] <Upu> ping KT5TK
[15:05] <radim_OM2AMR> Hi Upu,
[15:05] <Upu> hey Radim
[15:06] <radim_OM2AMR> I found STS-3 second payload, but& the same destiny like Tomek's payload - tree - http://i.imgur.com/KZqntJ1.jpg
[15:06] <Upu> ah :/
[15:06] <Upu> so it did hit the tree
[15:06] <Upu> was very very close
[15:08] <radim_OM2AMR> yes, it's there, we think it will fall down maybe, as the line will cut on the wood during its moves
[15:08] <radim_OM2AMR> btw, still TX-ing, battery about 1.44V - two AA in paralel :-)
[15:08] <Upu> lol it will go for a while :)
[15:09] <Upu> that a MAX6 ?
[15:09] <radim_OM2AMR> MAX6 1.8V
[15:09] <Upu> yeah will be a while
[15:09] <Upu> all this landing in trees is good for business keep it up :)
[15:10] <radim_OM2AMR> :-D lol
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[15:34] <daveake> Welcome, fellow hams ... :)
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[15:43] <Maxell> yay hamradio
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[15:56] <Laurenceb_> http://abload.de/img/notepad_prefinal2da5f.jpg
[15:56] <Laurenceb_> repost tiem :P
[15:58] <Randomskk> wow
[15:58] <Randomskk> what's that on?
[15:58] <Laurenceb_> F4 aiui
[15:58] <Randomskk> needs so much ram
[15:58] <Randomskk> what screen/dev board tho?
[15:59] <Laurenceb_> ill ask, just a sec
[16:02] <Laurenceb_> https://www.olimex.com/Products/ARM/ST/STM32-LCD/
[16:02] <Laurenceb_> oh, F1
[16:03] <Randomskk> cool
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[16:19] <anerDev> hey hey guys !
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[16:38] <mclane> ping daveake
[16:38] <daveake> pung
[16:38] <mclane> hi dave, i am still struggeling with the ublox i2c connection
[16:38] <daveake> ok from what processor?
[16:38] <mclane> I have an arm (lpc1227
[16:39] <daveake> OK, and how far have you got?
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[16:39] <ibanezmatt13> Good Afternoon :)
[16:39] <mclane> can you tell me what I have to send in front of the payload : the adress (0x42) with write bit set, then 0xff, then the payload?
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[16:40] <daveake> For NMEA you just keep reading bytes from address ox42
[16:40] <mclane> I am using the ubx protocol
[16:41] <daveake> Well you just write to port ox42
[16:41] <daveake> 0x42
[16:41] <daveake> Just the same as using a serial port
[16:41] <daveake> Well pretty much
[16:42] <mclane> that is what I tried, no success
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[16:42] <daveake> Do you see anything if you just keep reading from 0x42?
[16:43] <mclane> I will try that now
[16:43] <Laurenceb_> id use ubx
[16:43] <daveake> You should get 0xFF when there's no data, and, well, data when there is
[16:43] <Laurenceb_> save yourself a ton of tourble
[16:43] <daveake> Yes but first step is he needs to check the i2c is working and this will do that
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[16:43] <Laurenceb_> theres a "bytes in buffer" register
[16:44] <Laurenceb_> that you can poll
[16:45] <daveake> Sure but just to check i2c is working he just needs to keep reading and check he's getting data every second
[16:48] Action: Laurenceb_ goes back to reading nutty presentations
[16:48] <Laurenceb_> http://physics.fullerton.edu/~jimw/ASPW2012.pdf
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[16:49] <Randomskk> crazy people?
[16:52] <Laurenceb_> "DEAN DRIVE EFFECT"
[16:52] <Laurenceb_> that'd be a yes
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[16:57] <lz1dev> is that comic sans?
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[17:20] <mclane> daveake: reading works
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[17:20] <Leav_> hello
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[17:21] <Leav_> any HABers from europe here?
[17:21] <fsphil> hi hi
[17:21] <fsphil> a few
[17:21] <SpeedEvil> I sort of count.
[17:21] <fsphil> for the moment
[17:21] <Leav_> My friends and I are traveling to europe to launch a HAB
[17:21] <SpeedEvil> but haven't done a launch yet
[17:21] <ibanezmatt13> I am getting ready to begin my first HAB project and I have begun by writing the following code https://gist.github.com/ibanezmatt13/5274154 This is for a Raspberry Pi reading a Ublox GPS and sending via an NTX2 radio transmitter. I just wanted to know, with a GPGGA sentence, would it be OK to just grab the lat, lon, time and alt as opposed to the full sentence?
[17:21] <fsphil> where abouts in europe?
[17:22] <Leav_> was wondering if you had recommendations
[17:22] <SpeedEvil> ibanezmatt13: sure
[17:22] <ibanezmatt13> SpeedEvil: That's good. Thanks
[17:22] <Leav_> somewhere the wind won;t blow it out to sea...
[17:22] <SpeedEvil> ibanezmatt13: though you should also get lock valid
[17:23] <ibanezmatt13> SpeedEvil: I tried to add that to my code but I couldn't work out where to put it... https://gist.github.com/ibanezmatt13/5274154
[17:24] <SpeedEvil> umm just split by commas, and read out the appropriate fisting.
[17:24] <SpeedEvil> fields
[17:25] <Leav_> fsphil, any suggestions?
[17:25] <fsphil> is there such a thing as appropriate fisting?
[17:25] <fsphil> Leav_: I'm surrounded by sea, so not N.Ireland :)
[17:25] <Leav_> :)
[17:26] <fsphil> anywhere really. it's a big place
[17:26] <SpeedEvil> maybe the steppes of central Asia
[17:26] <fsphil> perhaps not italy
[17:26] <ibanezmatt13> I figured that it returns a 0 if no fix is found but a 1 if a fix is found. So, if the sentence had a 0, what should I have my program do?
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[17:26] Nick change: heathkid|2 -> heathkid
[17:27] <SpeedEvil> Mongolia is quite far from the sea
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[17:27] <fsphil> france would be pretty good
[17:27] Nick change: Leav_ -> Leav
[17:27] <fsphil> there doesn't seem to be very many launches there
[17:27] <mclane> or Germany
[17:28] <SpeedEvil> ibanezmatt13: you should report the position at least with a mark, so you know it is based on questionable data
[17:28] <fsphil> yea Germany is pretty huge, and no ocean to the east
[17:28] <ibanezmatt13> i see, I'll modify the code now, thanks :)
[17:28] <daveake> fsphil They do have at least one river :p
[17:28] <Leav> What are the common distances between launch and landing sites?
[17:28] <fsphil> haha, this is true
[17:28] <daveake> Leav varies enormously
[17:29] <daveake> In the summer especially could be say 10 miles
[17:29] <Leav> daveake, but certainly not 1000 km, right?
[17:29] <fsphil> it might be
[17:29] <daveake> >1000km has been done
[17:29] <daveake> >> in fact
[17:29] <Leav> wow ok...
[17:29] <fsphil> though those tend to be intentional
[17:29] <daveake> But those are floaters
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[17:29] <daveake> a normal up burst down flight might be 200km or so in the winter
[17:29] <SpeedEvil> Tomsk looks like a good launch site
[17:30] <fsphil> I've managed 600km or so
[17:30] <Leav> generally the wind in europe (at those altitudes) is eastern:?
[17:30] <Leav> (meaning blowing east)
[17:31] <daveake> Well in the summer it's quite comon to go east till you get high then go west
[17:31] <Leav> hmph. no easy answers!
[17:31] <fsphil> nope :)
[17:31] <daveake> Nope
[17:31] <fsphil> the west east thing is handy, as it brings the payload back to you somewhat
[17:31] <Leav> yeah I figured...
[17:31] <Leav> ok... so another question:
[17:32] <fsphil> winds for me atm are heading south
[17:32] <Leav> you mentioned floaters, and this seems to agree with my thinking: I can't really understand baloon physics
[17:32] <Leav> at ground level the pressure inside is greater than outside, yet the average density is lower, so it rises.
[17:33] <Leav> as it rises, the pressure outside drops, so the baloon expands, gaining more since the average density of the baloon is decreasing faster than the air density is decreasing?
[17:34] <Leav> am I understanding correctly?
[17:34] <Leav> gaining more LIFT (I meant to say)
[17:34] <SpeedEvil> the balloon has a finite pressure inside at burst
[17:35] <SpeedEvil> this can mean that the density inside the balloon due to this extra compression rises
[17:35] <SpeedEvil> this can mean buoyancy falls to zero
[17:38] <Leav> hmm
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[17:39] <Leav> so if I underinflate a baloon, it can rise and not burst?
[17:39] <fsphil> yep
[17:39] <SpeedEvil> yes
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[17:39] <Leav> so what would bring a baloon like that down?
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[17:39] <Leav> why don't they float around the world?
[17:40] <SpeedEvil> in general, for each sort of balloon, there is an ascent rate below which it may float
[17:40] <SpeedEvil> UV degradation
[17:40] <Leav> cool
[17:40] <SpeedEvil> or leakage
[17:40] <fsphil> they seem to stretch a bit over time too
[17:40] <fsphil> making them weaker
[17:40] <Leav> that's why the RedBull and similar baloons have foil over them I guess?
[17:41] <SpeedEvil> or tensile failure, yeah
[17:41] Action: fsphil makes a note of that
[17:41] <Leav> cool. good to know I understood the physics
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[17:41] Nick change: [1]G8KNN -> G8KNN
[17:42] <Leav> so it's a balance? too little and it might float, too much and it will burst early?
[17:43] <daveake> yup
[17:44] <Leav> ok
[17:44] <Leav> would you say germany has a decent coverage of APRS iGates?
[17:45] <Leav> we're using an APRS transmitter and are sortof relying on APRS iGates for position reporting
[17:49] <fsphil> most people here don't use aprs
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[18:03] <Leav> fsphil, why not?
[18:03] <Leav> APRS is for newbies?
[18:04] <lz1dev> its prohibited to use APRS while at altitude
[18:05] <fsphil> in some countries anyway
[18:05] <fsphil> well not APRS specifically, but amateur radio transmitters
[18:05] <lz1dev> refering to the UK
[18:06] <Leav> oh ok, that's good to know I guess...
[18:06] <Leav> is it just the UK?
[18:06] <Leav> how else do you track your baloons if not with amateur radio?
[18:06] <fsphil> license exempt modules
[18:06] <fsphil> on 434mhz, which happy is in the 70cm band :)
[18:07] <SpeedEvil> 434mhz, 10mw, 50 bps
[18:07] <Leav> is it just the UK?
[18:08] <SpeedEvil> goes over 500 km at altitude
[18:08] <Leav> we're planning on the mainland
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[18:09] <SpeedEvil> there aren't many people outside the UK
[18:09] <nigelvh> I'm in the US and most of us here use APRS. It generally works pretty well for us.
[18:09] <SpeedEvil> aprs works well, if legal.
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[18:10] <SpeedEvil> I don't know how the legal position varies over europe
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[18:11] <nigelvh> Upu has done a little bit of work in figuring out where it's legal and where it's not. http://ava.upuaut.net/?p=471
[18:11] <Willdude123> Hello
[18:12] <nigelvh> Green is known legal, red is known illegal, and yellow is unknown.
[18:12] <Upu> http://ukhas.org.uk/general:aprs_legislation?s[]=aprs
[18:12] <Upu> https://maps.google.co.uk/maps?q=https:%2F%2Fraw.github.com%2FUpuaut%2FAPRS_Projects%2Fmaster%2FData%2FEurope.kml&hl=en&sll=52.8382,-2.327815&sspn=7.622047,20.083008&t=h&z=3
[18:12] <nigelvh> Thank you Upu
[18:12] <Upu> welcome
[18:12] <Willdude123> DAE hate it when your parents love your cat more than you?
[18:13] <Randomskk> haha
[18:13] <SpeedEvil> awesome Upu !
[18:13] <Randomskk> my mother starts calling the cat my name
[18:13] <Randomskk> lets the cat sleep on my bed when I'm away
[18:13] <Randomskk> lets the cat sit at the table
[18:13] <SpeedEvil> hah
[18:14] <Randomskk> has once or twice called me by the cat's name
[18:14] <Randomskk> they got the cat just before I left for university too
[18:14] <Randomskk> so it's pretty much a replacement for me
[18:14] <SpeedEvil> as long as she doesn't put it in her will.
[18:14] <Randomskk> haha
[18:14] <Upu> I encourage people to fill in, with citation, the missing countries
[18:15] <Willdude123> My parents basically have bribed me into 'behaving well'. They said they will think about letting me buy a pc if I 'behave well'. That's latin for 'be disillusioned into thinking there's a point in not comitting suicide.'
[18:16] Upu (~Upu@2a00:14f0:e028:0:44a6:4d81:2119:bf7c) left irc: Read error: Connection reset by peer
[18:17] <fsphil> amazing how much Latin is like English
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[18:19] <Willdude123> You know what I mean.
[18:19] <Willdude123> They want me to be disillusioned into thinking there's a point in living.
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[18:23] <Willdude123> But there isn't one.
[18:23] <fsphil> you make a point. that's the point
[18:23] <fsphil> also, stop moaning :p
[18:24] <Willdude123> Sorry
[18:25] <Willdude123> So how do I make up a point?
[18:25] <Willdude123> The only dream I have left is going to MIT, but that's damned impossible.
[18:26] <eroomde> why is it impossible?
[18:26] <Willdude123> A) Finance
[18:26] <Willdude123> B) Lack of aptitude
[18:26] <eroomde> i think you have a few years yet before you need to worry about crossing that bridge
[18:27] <Willdude123> Exactly.
[18:28] <daveake> Willdud123 Sod Finance and Aptitude, get your Atitude right you've got time to sort out the others
[18:28] <daveake> +e
[18:28] <Randomskk> finance isn't really the thing to worry about with mit anyway, they have buckets of cash if you can't afford it otherwise
[18:28] <daveake> And part 1 of atitude is not putting yourself down
[18:28] <Willdude123> You're right.
[18:28] <gonzo_> and in the meantime, you can play with altitude
[18:29] <daveake> :)
[18:29] <Randomskk> I wouldn't fixate on one destination either though
[18:29] <daveake> I was heading that way :)
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[18:29] <Willdude123> The only reason I'm crap is because I think I am.
[18:30] <Willdude123> Something like that?
[18:30] <Gadget-Mac> Upu: Is there a way to find out the status of the active antenna on the uBlox ?
[18:30] <gonzo_> Willdude123, how long did it take you to get the basis of a working tracker?
[18:30] <eroomde> i beleive so but let me check
[18:31] <eroomde> Willdude123: i think you're probably about ready to read Camus
[18:31] <daveake> And the answer in weeks is probably less than at least 1 person in years
[18:31] <eroomde> it's a bit annoying because you realise it's not unique to you and you're not unique
[18:31] <daveake> no names no packdrill
[18:31] <eroomde> but it's still a useful process
[18:32] <gonzo_> (more annoying, worrying is when you realise that you've turned into your parents!)
[18:33] <Randomskk> or when you realise you are currently turning into your parents and there's nothing you can do about it
[18:33] <eroomde> i have recently found myself more inclined to go to bed at 10.30 than take up an ivitation to go out
[18:33] <eroomde> on a few occassions
[18:33] <fsphil> eek
[18:33] <eroomde> it's nae gud
[18:34] <gonzo_> when tea is more attractive than beer? NOOO NEVER!
[18:34] <eroomde> no
[18:34] <eroomde> can't forsee that
[18:34] <fsphil> I like neither, but if I had to choose it would be tea
[18:35] <gonzo_> if that happened, please someone shoote me and throw me into 80mtrs
[18:35] <daveake> fsphil You sure you're a radio ham? You don't seem to fit the spec
[18:35] <fsphil> ofcom give me some letters and numbers, so I think so
[18:35] <gonzo_> careful dave.... stones and your newly aquired glass house
[18:35] <Upu> hey Gadget-Mac in what way ?
[18:36] <fsphil> or they where playing Countdown
[18:36] <fsphil> not sure
[18:36] <daveake> gonzo_ I'm getting it out of my system before I get my callsign
[18:36] <gonzo_> hhh
[18:36] <Gadget-Mac> Upu: Not convinced it's working that well
[18:36] <fsphil> be lazy, M6MMM
[18:36] <daveake> M6MMM chocolate
[18:36] <daveake> donuts
[18:36] <fsphil> prtgrvy
[18:36] <fsphil> er
[18:37] <fsphil> perfect
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[18:37] <Upu> is it getting lock Gadget-Mac ?
[18:37] <Gadget-Mac> Yes, gpsd / cgps is reporting a 3d fix
[18:38] <gonzo_> cake!
[18:38] <mfa298> surely you want to aim for M0MMM so you only have to send Dashes (Could also have T or O)
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[18:38] <mfa298> that if you ever feel like sending morese
[18:39] <gonzo_> no, don't do it. That's a ticket to 80mtrs
[18:39] <daveake> less
[18:39] <griffonbot> Received email: Alan Oakden "[UKHAS] Re: First Launch - Sci1"
[18:39] <gonzo_> get zxq so you will NEVER take up cw
[18:39] <daveake> lol
[18:40] <Upu> how did your QSO go ?
[18:40] <daveake> Hoping for -- -.... .... .- -...
[18:40] <gonzo_> only time I ever use cw is to try and make letters out of the randon bipping the sandwich van driver makes on the horn as he drives into the works carpark
[18:40] <Randomskk> lol foundation QSOs
[18:40] <daveake> Ah pretty easy
[18:40] <Randomskk> we had to write down what we were going to say (to the word) on a piece of paper first
[18:41] <Randomskk> with scripted questions from the other end
[18:41] <Randomskk> "how is the weather in cambridge"
[18:41] <Randomskk> "it is terrible thank you, how is the weather in canada"
[18:41] <gonzo_> it's as good as any dave!
[18:41] <gonzo_> it is ah raining not ??
[18:41] <daveake> :)
[18:41] <daveake> On mine, the guy recognized me and we started talking HAB
[18:42] <lz1dev> any used gphoto for taking pictures ?
[18:42] <daveake> I think I signed up to do a talk :p
[18:42] <lz1dev> anyone*
[18:42] <gonzo_> off to turn more metal into pretty coloured swarf..... laters
[18:42] <Randomskk> lz1dev: yes
[18:43] <Randomskk> turns out it can drive my slr
[18:43] <Randomskk> to take a photo and download it to the pc
[18:43] <Randomskk> very handy
[18:43] <anerDev> hi guys !
[18:44] <lz1dev> Randomskk: im just wondering whenever there are python bindings
[18:45] <Randomskk> not sure
[18:45] <Randomskk> I just had python run the gphoto2 binary or something
[18:46] <lz1dev> im need to control 2+ cameras
[18:47] <lz1dev> and if i can get python, that would be a breeze
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[19:00] <Babs> Evening Daveake - can I ask a balloon trajectory question (I'm launching from pretty near your launch site from what i can work out) please?
[19:00] <daveake> sure
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[19:02] <Lunar_Lander> hello
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[19:03] <SP9UOB> evening all
[19:04] <Lunar_Lander> hello
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[19:04] <SP9UOB> any tips to detect launch and touchdown ?
[19:04] <Upu> ascent rate
[19:05] <Upu> just be aware you may land high up, my code switched back to pedestrian mode on GPS below 1000m however I landed at 1600m asl :/
[19:05] <SP9UOB> Upu: i was thinking about and this is not trivial anyway. Altitude fluctuation can result false positives
[19:05] <Upu> well yes
[19:05] <Upu> but
[19:06] <Upu> if rate of ascent is between -1 and 1 its either floating or landed
[19:06] <Upu> unless you're going super slow
[19:07] <SP9UOB> the goal is to recort, launch, higest altitude and touchdown in internal eeprom - in case od finding by someone
[19:07] <SP9UOB> record
[19:07] <Upu> well interupts again
[19:07] <daveake> Or you're launching into or just over a tree ...
[19:07] <Upu> my code reports the highest altitude achieve between transmissions
[19:07] <Upu> so whatever it transmits is the highest altitude achieved
[19:07] <SP9UOB> Upu: higest is easiest, have already done :-)
[19:08] <SP9UOB> High alt recorded at 2013-05-19 17:06:56
[19:08] <SP9UOB> Altitude: 329 LAT: N5016.66618 LON: E01839.27145
[19:08] <SpeedEvil> world elevation maps are available. and nearly free to use if you have something like the pi
[19:08] <SpeedEvil> get elevations at 500m grid
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[19:09] <SP9UOB> second goal is to disable GPS after touchdown - which could save some energy for longer recovery
[19:09] <SpeedEvil> if within 500m of a point switch to low alt mode
[19:09] <Upu> well yes you can work out if you're not moved for a bit
[19:10] <SpeedEvil> a pi uses way mire energy than the GPS
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[19:10] <Lunar_Lander> hi GW8RAK
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[19:12] <Babs> dakeake: (sorry, internet went biblically slow for a moment) - does the attached trajectory looks sufficiently far from Heathrow etc. based on your flights to date (to the extent any of them have gone in a similar direction?) http://www.flickr.com/photos/91049302@N00/8755153490/in/photostream
[19:12] <GW8RAK> Hi Lunar_Lander
[19:12] <Lunar_Lander> how are you?
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[19:13] <GW8RAK> Good, but tired. 4 hours cutting grass today
[19:13] <Lunar_Lander> ah
[19:13] <Lunar_Lander> that's a lot of work
[19:13] <GW8RAK> Too much land
[19:13] <Upu> damn connection
[19:13] <Upu> Babs
[19:13] <Upu> do you want me to set the hourly up for you
[19:13] <Babs> Hey Upu
[19:13] <Lunar_Lander> yea
[19:14] <Lunar_Lander> btw
[19:14] <Lunar_Lander> UK was better than Germany on ESC!
[19:14] <Lunar_Lander> :)
[19:15] <Babs> Whats the hourly Upu (or is the clue in the question?)
[19:15] <daveake> Babs Yeah I'd be happy flying that
[19:15] <GW8RAK> That would not be difficult. :)
[19:15] <Upu> http://hourly.upuaut.net/
[19:15] <daveake> Babs When are you intending to fly?
[19:15] <GW8RAK> Garden at 78.144.94.201:8081
[19:15] <Upu> shows every landing position by the hour for the next week
[19:15] <Lunar_Lander> and Ireland should have sent Jedward again, probaly would have saved them from last place xD
[19:16] <Babs> 0600-0700 launch next Saturday ideally
[19:16] <GW8RAK> Norway was good.
[19:16] <daveake> I might be flying on Sunday and I've applied for 2 launches (I think)
[19:16] <Upu> that prediction looks ok Babs
[19:16] <Upu> but too early really
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[19:16] <GW8RAK> I can't believe I'm discussing ESC
[19:16] <Babs> My mate's house where we will be based has a beer festival on the Saturday night
[19:16] <Lunar_Lander> yea
[19:16] <Upu> busy weekend
[19:16] <daveake> Yeah can change a LOT between now and then
[19:16] <Upu> shame I'm in Scotland
[19:16] <Lunar_Lander> and our 2010 singer failed at reading the points from germany
[19:17] <Lunar_Lander> "10 Points to Norway! Oh no, no, sorry, Denmark!"
[19:17] <Babs> Although i should have permission for a similar launch on the 26th and 27th a 25th launch gives us the potential to attend and get lashed
[19:17] <GW8RAK> :)
[19:17] <daveake> My bacon butties can't compete with that
[19:17] <Babs> Agreed Daveake - am going to keep checking on a daily basis and will keep the googlegroup updated
[19:18] <Lunar_Lander> we gotta congratulate Brian when he is back here
[19:18] <Babs> *Babs assumes it will take less than 12 hours to find the thing when/if it lands
[19:18] <daveake> If it's > 1 hour something's gone wrong
[19:19] <Babs> I have a home made tracker and the last time I built an antenna for it I mounted it upside down, what could possibly go wrong?
[19:19] <daveake> Well mostly. Exclusions include landing 1500m up an Austrian hill
[19:19] <daveake> upside down is correct :p
[19:20] <Babs> Ahh, i mean it was upside down to the normal HAB upside down. ie the right way up.
[19:20] <Babs> if it wasn't a HAB
[19:21] <Lunar_Lander> so like for a submarine?
[19:22] Nick change: MichaelC|Sleep -> MichaelC
[19:24] <SP9UOB> Upu: are You working with coordinates as uint32 and not float?
[19:26] <Upu> int32_t
[19:26] <Upu> MichaelC = Mondo ?
[19:26] <SP9UOB> ok
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[19:26] <MichaelC> Upu: hm?
[19:27] <Upu> there is another Michael C :)
[19:27] <MichaelC> oh
[19:27] <Upu> flys Mondo
[19:27] <MichaelC> I'm the WASP MichaelC (with Ali Al-azzawi). :P
[19:27] <Upu> ah sorry :)
[19:27] <Upu> I recall now
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[19:28] <MichaelC> No worries. :) As he is out of the country for a while I'm basically leading it now (with his help from abroad)
[19:28] <Upu> launching again ?
[19:28] <MichaelC> yeah but not until january
[19:28] <Upu> oh ok super
[19:28] <MichaelC> due to funding/exams at the school
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[19:35] <SP9UOB> all: is there any NMEA simulator which takes, say HAB logs and replayes it, or i must write my own ?
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[19:39] <Upu> http://ukhas.org.uk/guides:common_coding_errors_payload_testing
[19:39] <Upu> at the bottom
[19:40] <SP9UOB> WOW thanks :-)
[19:42] <SP9UOB> thats makes life easier :-)
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[19:51] <Babs> Internet down at home...upu - how do I change the input data on the hourly?
[19:51] <Upu> I can fix that for you
[19:51] <Upu> whats launch location and burst ?
[19:51] <Upu> alt
[19:52] <Upu> takes 30 mins to run and updates 4 times a day
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[19:54] <Upu> wb
[19:54] <chrisstubbs> More pi problems :) LDO is overheating and doing crazy things to the voltage supply
[19:54] <Upu> whats launch location and burst alt Babs ?
[19:54] <Babs> Burst 33500 after 127 mins launching at 0700 on 25th May - so burst at 0907
[19:55] <chrisstubbs> daveake, did you have any heat issues with your power supply wrapped up in foam insulation??
[19:55] S_Mark (~S_Mark@212-139-251-8.dynamic.dsl.as9105.com) joined #highaltitude.
[19:55] <Upu> launch location ?
[19:55] <Upu> hey S_Mark
[19:55] <Upu> nice picture
[19:55] <S_Mark> Hello Upu
[19:55] <S_Mark> Ah thanks, videos and pictures way better this time!
[19:55] <Babs> Lat 51.956468
[19:55] <Babs> Long -1.416999
[19:55] <Babs> Cheers upu
[19:56] <Upu> k setting it up now will be 30 mins or so
[19:56] <S_Mark> Had rubbish signal yesterday, missed out on the chat and the map
[19:56] <Lunar_Lander> hi S_Mark
[19:56] <Lunar_Lander> S_Mark, congrats
[19:57] <Lunar_Lander> the UK was better than germany on ESC :)
[19:57] <S_Mark> Thanks Lunar_Lander
[19:57] <Babs> Thanks upu !
[19:57] <Upu> running now
[19:57] <Upu> can we clear STRATODEAN from tracker S_Mark ?
[19:58] <mattbrejza> this was Lunar_Lander yesturday: https://fbcdn-sphotos-d-a.akamaihd.net/hphotos-ak-frc1/p480x480/401899_393478350767857_1980421012_n.jpg
[19:58] <mattbrejza> :P
[19:59] <S_Mark> Yep Upu thanks
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[20:01] <Lunar_Lander> lol
[20:03] <SP9UOB> night all
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[20:03] <ibanezmatt13> Good Evening :) For my Raspberry Pi, I was thinking about how I should regulate the power supply from the Lithium AA batteries. I will be using a Model A Pi which according to Wikepedia needs 5V at 300mA as it is 1.5W rated. http://www.hobbytronics.co.uk/d24v3f5-5v-regulator Is the regulator on that link appropriate for what I need?
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[20:04] <Upu> hi ibanezmatt13
[20:04] <daveake> ibanezmatt13 Are you using any 5V devices? i.e. USB?
[20:05] <ibanezmatt13> Well, I was going to use a webcam, but I then thought, it would make more sense to use an independent HD video camera and just use Pi for telemetry seen as this is my first attempt
[20:05] <daveake> OK. First off, the A uses about 115mA
[20:05] <ibanezmatt13> Wow, that's less than I though
[20:05] <ibanezmatt13> thought*
[20:05] <daveake> Second, you only need 3.3V you don't need 5V.
[20:06] <ibanezmatt13> I see. That's Wikipedia for you...
[20:06] <daveake> Third, the 5V supply does need something on it but 3.3 is fine (not tried it but I got this from Eben's mouth)
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[20:06] <daveake> Forthly, the supplied 5V --> 3V3 reg is a piece of shit (also Eben's words, and mine)
[20:07] <daveake> So, 4 AAAs or AAs --> a decent 3.3V LDO --> 3.3 AND 5V lines.
[20:07] <Upu> ibanezmatt13 you probably picked the right person to ask :)
[20:07] <ibanezmatt13> Upu: indeed :) So does the regulator need to have a certain current rating
[20:07] <ibanezmatt13> ?
[20:08] <daveake> 115mA :p
[20:08] <ibanezmatt13> Ok, thanks for the help. I shall have a look! :)
[20:08] <daveake> Choose one that's got the lowest drop-out voltage at say 200mA
[20:08] <Lunar_Lander> short question for the british https://www.youtube.com/watch?v=7fgLrfi9JCI
[20:08] <Lunar_Lander> this is from ESC 1998
[20:08] <ibanezmatt13> daveake: thanks :)
[20:09] <daveake> np I'm possibly flying an A next Sunday
[20:09] <Lunar_Lander> is the part with the Pet Shop Boys music like to show british engineering?
[20:09] <Lunar_Lander> i.e. from the Blacksmith to modern steel mills?
[20:09] <ibanezmatt13> how's this http://compare.ebay.co.uk/like/350750163961?var=lv&ltyp=AllFixedPriceItemTypes&var=sbar&_lwgsi=y&cbt=y&adtype=pla&crdt=0&ff3=1&ff11=ICEP3.0.0&ff12=67&ff13=80&ff14=63&ff19=0
[20:10] <daveake> Nah don't use that. Just fine a simple TO220 cased 3-pin fixed 3.3V LDO
[20:10] <daveake> fiund
[20:10] <daveake> find
[20:10] <ibanezmatt13> ah, thanks
[20:11] <daveake> If you get stuck ask me tomorrow I'll tell you what I settled on
[20:11] <ibanezmatt13> okie dokie, cheers.
[20:13] <Lunar_Lander> does anyone have an answer to my question?
[20:13] <Lunar_Lander> :)
[20:13] <ibanezmatt13> just one thing, what is meant by 3.3v and 5v lines?
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[20:21] <Upu> ping Babs http://hourly.upuaut.net/
[20:22] <arko> are you feelin lucky?
[20:22] <Lunar_Lander> hi arko
[20:23] <cm13g09> arko: lol
[20:24] <cm13g09> top tip seems to be "Don't launch on Thursday"
[20:25] <Upu> no you might land in Brighton
[20:25] <Lunar_Lander> and british industry seems to be cool
[20:25] <Lunar_Lander> according to the ESC clips
[20:25] <Lunar_Lander> xD
[20:25] <cm13g09> Upu: or in the sea
[20:25] <Upu> preferable
[20:26] <cm13g09> true
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[20:27] <cm13g09> Friday looks vaguely OK
[20:27] <cm13g09> although it's a bit of a drive....
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[20:29] <arko> so i left my pico running over night
[20:30] <arko> worked fine for 2 hours then i went home, came back and it was only keying up and outputing garabage
[20:30] <arko> i removed the antenna, cycled the power
[20:30] <arko> works fine
[20:31] <arko> anyone experienced this with the HX1
[20:31] <Upu> negative
[20:31] <arko> hmm, perhaps i've damaged the unit
[20:31] <nigelvh> What was the power supply?
[20:31] <arko> 3.3v
[20:31] <arko> all parts are tolerant to 3.6v
[20:31] <Upu> to the HX1 ?
[20:31] <nigelvh> No, how are you powering it? Batteries and a boost, or a 3.3V regulator
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[20:32] <arko> no, thats 5v
[20:32] <nigelvh> Also the HX1 needs 5V
[20:32] <arko> it has a boost
[20:32] <arko> power supply
[20:32] <arko> at the moment
[20:32] <nigelvh> What voltage was feeding the boost?
[20:33] <arko> 3.3v
[20:34] <nigelvh> Ok. If you're using the 61202 it can't supply 5v power for the HX1 from a source voltage much below 2.8V or so.
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[20:35] <Upu> 62100
[20:35] <arko> its a tps61240
[20:35] <Upu> the inefficiences kick in and it pulls stupid amps
[20:35] <Lunar_Lander> btw thanks to Adam Greig for the NTX2 calculation!
[20:36] <arko> 0.5A max output
[20:36] <nigelvh> Doesn't matter with the output. What matters is how hard it has to work to boost the voltage.
[20:36] <Upu> from a single cell
[20:36] <nigelvh> As the battery voltage gets lower it has to work LOTS harder.
[20:37] <Upu> on HX1 TX it pulled 1.2A from battery
[20:37] <arko> woah
[20:37] <arko> what?
[20:37] <Upu> boosting up from a single cell
[20:37] <Upu> to 5V
[20:37] <Upu> and on transmit
[20:37] <arko> damn it
[20:37] <Upu> run it from 2 cells and it drops to something more manageable
[20:37] <arko> yeah i have two cells
[20:38] <arko> hence 3.3ish volts
[20:38] <Upu> measure the cell voltage on each one now
[20:38] <arko> but at the moment, it's on a power supply
[20:38] <arko> thats what i was running it on over night
[20:38] <Upu> oh ok
[20:38] <arko> input voltage was a clean 3.3v
[20:38] <Upu> odd
[20:38] <arko> yeah
[20:38] <arko> now its working fine since i removed the antenna
[20:39] <Upu> run the antenna on an SWR meter ?
[20:39] <nigelvh> As for overnight, I doubt that's the HX1, I'd be more apt to blame trackuino.
[20:39] <Upu> HX1 is fairly bomb proof
[20:39] <arko> i was thinking about that, but i dont have one. i am using my diamond antenna for my handheld
[20:39] <nigelvh> Do you have a ground plane set up?
[20:40] <arko> my guess is that the circuit for the hx1 is matched when nothing is connected and when a proper antenna is connected
[20:40] <nigelvh> DO NOT OPERATE THE HX1 WITHOUT AN ANTENNA
[20:40] <nigelvh> (or dummy load)
[20:40] <Upu> hehe
[20:40] <arko> damn, keep forgetting about that bot
[20:40] <Upu> don't
[20:40] <Upu> but I did it for 36 hours and it works fine
[20:40] <nigelvh> Never operate a radio transmitter without an antenna or load on the output.
[20:41] <Upu> just stick a 1/2 watt 50 ohm resistor on it
[20:41] <Lunar_Lander> otherwise it will fry itself?
[20:41] <nigelvh> Yes
[20:41] <Upu> well in theory
[20:41] <arko> well, i know you're not suppose to
[20:41] <Upu> but it doesn't
[20:41] <nigelvh> They very well can
[20:41] <arko> but i heard the hx1 could without it
[20:41] <nigelvh> I've seen it happen.
[20:41] <Upu> practical experience > making it up as you go along
[20:42] <arko> i imagine it gets a lot of relection and hurts the rf synth or amp or whatever is behind it
[20:42] <Upu> noted for future
[20:42] <arko> not sure if i should fly this hx1
[20:42] <nigelvh> Yes, it's a high VSWR condition and the RF FETs don't like it.
[20:42] <fsphil> it generates heat in the radio
[20:42] <arko> i think im going to use the other one
[20:42] <Upu> I've nearly finished my 70cms Si4464
[20:43] <arko> :D
[20:43] <arko> it can do aprs in the us!
[20:43] <arko> this is awesome!
[20:43] <arko> 119-1050Mhz
[20:43] <nigelvh> In bands, but yes, KT5TK and I are both working on 4464 versions as well.
[20:43] <arko> and it's 1.8v to 3.6v
[20:43] <arko> this is a fantastic chip Upu!
[20:43] <arko> damn
[20:44] <Upu> Yeah I mailed him earlier
[20:44] <nigelvh> Here's the board from KT5TK's flight. It's a 4464 board. http://kt5tk.files.wordpress.com/2013/05/pecanpico3.jpg
[20:44] <arko> oh wow
[20:44] <Upu> I've been trying to find a VCXO that runs @ 1.8v
[20:45] <arko> :)
[20:45] <Upu> thats 3.3v the part he's using
[20:45] <arko> isn't the 1.8v min limit a bit close to margins
[20:45] <Upu> limit to what ?
[20:45] <arko> those lithiums drop below 1.8v after some use
[20:46] <Upu> stepup
[20:46] <arko> oh
[20:46] <nigelvh> And the PA on the 4464 is going to be a bit underpowered at 1.8V
[20:46] <arko> derp, that makes sense
[20:46] <Upu> should be able to get 10mW out of it nigelvh
[20:46] <Upu> which is all we can use anyway
[20:46] <nigelvh> Max power at 3.6V is about 20.5dBm and at 1.8 is 14.5dBm
[20:47] <Upu> fine :)
[20:47] <nigelvh> True enough
[20:47] <Laurenceb_> nigelvh: whats the rf chip there?
[20:47] <nigelvh> SI4464
[20:47] <Upu> Si4464
[20:47] <Upu> http://www.silabs.com/Support%20Documents/TechnicalDocs/Si4464-63-61-60.pdf
[20:48] <Laurenceb_> ah
[20:48] <nigelvh> However, you might get a bit of a output boost as it gets cold.
[20:48] <Laurenceb_> nice
[20:48] <nigelvh> Perhaps about 1 dBm
[20:48] <Upu> still more than 10mW
[20:48] <nigelvh> from 20C to -40C
[20:49] <Upu> lack of power I can deal with
[20:49] <Upu> stopping working because chinese people use cheap components is the issue I'm trying to avoid
[20:49] <nigelvh> Yes, but is less convenient for doing APRS on your floaters.
[20:49] <Upu> well APRS will either be a separate board or a HX1 I suspect
[20:50] <nigelvh> And yes, the RFM issues are inconvenient.
[20:50] <Laurenceb_> hang on
[20:50] <Laurenceb_> how are you clocking the silabs?
[20:50] <Upu> 27Mhz VCXO
[20:50] <Laurenceb_> itll run off that?
[20:50] <nigelvh> Yep
[20:50] <Laurenceb_> oh, nice
[20:50] <nigelvh> Modulate the VCXO for FM
[20:51] <nigelvh> Works pretty nicely.
[20:51] <Upu> you could make it do SSB ?
[20:51] <Upu> similar way to how we modulate the NTX2 ?
[20:51] <nigelvh> I don't see why not.
[20:51] <Upu> thats my theory
[20:51] <Laurenceb_> i thought someone tested it
[20:52] <Laurenceb_> and pll failed to lock
[20:52] <Laurenceb_> actually that was si4432
[20:52] <Laurenceb_> older silabs
[20:52] <Laurenceb_> this is really good news :P
[20:52] <nigelvh> KT5TK's flight yesterday was a 4464 board.
[20:52] <Upu> or just do a constant carrier and pull the frequency slightly
[20:52] <Laurenceb_> neat
[20:52] <Laurenceb_> dual smps?
[20:52] <Laurenceb_> 5v, 3.3v?
[20:52] <nigelvh> No
[20:52] <Upu> no
[20:52] <nigelvh> 3.3
[20:53] <Lunar_Lander> Upu, I had a look at that 250 mV dropout regulator at farnell
[20:53] <Upu> odd design decision
[20:53] <Lunar_Lander> they said that the output cap needs to have a very low ESR
[20:53] <Laurenceb_> why are there 2 smps chips?
[20:53] <Upu> to turn GPS off
[20:53] <Laurenceb_> oh, fairdoos
[20:53] <Upu> he has a separate regulator
[20:53] <Upu> though personally I'd have used a fet
[20:53] <nigelvh> Yeah, he wanted separate for the GPS.
[20:53] <Lunar_Lander> but they don't say any specification for the input cap, save for a size
[20:53] <nigelvh> The input cap is far less important in a linear regulator.
[20:54] <Lunar_Lander> OK, so they say that one should get a X5R or X7R cap on the output
[20:55] <Upu> whatever is in the datasheet Lunar
[20:55] <Upu> just make sure its rated to -40 or whatever
[20:55] <Lunar_Lander> yea
[20:55] <Lunar_Lander> interestingly
[20:56] <Lunar_Lander> on the ST regulator I used so far, they specify 100 nF input and 10 uF output
[20:56] <Upu> thats not interesting Lunar_Lander for the record :)
[20:56] <Lunar_Lander> microchip gives 4.7 uF on the input and 1 uF on the output
[20:56] <Lunar_Lander> well yea
[20:56] <Lunar_Lander> I was just wondering that the bigger cap was on the other side in that regulator
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[20:58] <Lunar_Lander> caps are rated down to -55°C
[20:58] <Lunar_Lander> that is good :)
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[21:02] <Laurenceb_> id be interested to see it doing rx
[21:02] <Laurenceb_> (that board)
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[21:03] <Willdude123> Upu: You around?
[21:03] <Upu> I am
[21:05] <Willdude123> You know Norton Safety Minder? The ssh tunnel works, but is there a more permanent option?
[21:05] <Upu> sure
[21:05] <Upu> remove Norton
[21:05] <Upu> https://support.norton.com/sp/en/uk/home/current/solutions/kb20080710133834EN_EndUserProfile_en_us
[21:05] <Willdude123> My dad isn't actually talking to me at all, so I can't actually get him to remove it.
[21:06] <Upu> Now normally I'd be sensible and say its your Dads call on this and you should ask him
[21:06] <Willdude123> But, it's standalone from antivirus and needs a password.
[21:06] <Upu> but its a total waste of memory and processing power and it doesn't actually work
[21:06] <Willdude123> Haha
[21:06] <Upu> quite the opposite it just gets in the way and causes issues
[21:06] <Willdude123> Yeah.
[21:07] <Upu> just over install windows
[21:07] <Willdude123> I can't even watch my physics course videos.
[21:07] <Upu> exactly
[21:07] <Willdude123> I don't want to do that.
[21:07] <Upu> what is the exact product ?
[21:08] <Upu> Norton Safety Minder ?
[21:08] <Willdude123> Yeah, I have norton also
[21:08] <Willdude123> https://onlinefamily.norton.com/familysafety/loginStart.fs
[21:09] <Willdude123> Thing is, it's like a curfew tag. They know if I remove it.
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[21:09] <Upu> I think you can just remove the network cable and uninstall it from what I can gather
[21:10] Action: SpeedEvil imagines McaFee safety minder. Teaches you to make drugs and get deported from Guatamala
[21:11] <mfa298> If it adds a driver into the network stack I wonder if the "netsh winsock reset catalog" and similar commands would remove it
[21:12] <Upu> ah ok
[21:12] <Upu> WILLdude
[21:12] <Upu> boot in safe mode no networking just add/remove it
[21:12] <Upu> reboot
[21:12] <Upu> put Microsoft Security Essentials on it
[21:12] <Upu> and don't go to any naughty sites or I'll tell you off ok ?
[21:12] <Willdude123> Haha
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[21:13] <Willdude123> It might not even let me add/remove it.
[21:13] <Upu> try
[21:13] <Upu> it
[21:13] <Upu> safe mode
[21:13] <Upu> afk dog walk
[21:13] <Willdude123> I presume their software detects if it is disabled.
[21:13] <Willdude123> Or if it isn't on there.
[21:13] <Babs__> Upu - is the hourly done yet? Is that a program you are running on your own system?
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[21:13] <Willdude123> My dad is a total dick sometimes.
[21:14] <Willdude123> New arduino things look cool.
[21:15] <Upu> yep done Babs__
[21:15] <Upu> its running on a virtual server I have here yes
[21:15] <Upu> afk
[21:17] <Babs__> That's pretty cool. Could you post the link again (i had to restart here) - thanks loads
[21:17] <mfa298> 21:21 < Upu> ping Babs http://hourly.upuaut.net/
[21:18] <Babs__> thanks mfa298 (and Upu)
[21:24] <chrisstubbs> Olimex seems to think my AVR-ISP500 programmer got lost in the post becuase my postcode wasnt in uppercase
[21:24] <chrisstubbs> I dont like this company
[21:26] <Upu> Babs__ it good because you can see how quickly predictions are changing and in what direction
[21:26] <mfa298> Hopefully you paid by credit card - at least that way you should be able to get your money back through them if they don't fix the issue.
[21:27] <eroomde> the 'how does this week look' at-a-glane was why it was written
[21:27] <eroomde> glance*
[21:27] <Willdude123> Upu, have you seen the new arduino yun.
[21:27] <Willdude123> *?
[21:27] <Upu> the Due ?
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[21:27] <chrisstubbs> Dont have a credit card, but its through their ebay outlet so its in the resolution center now
[21:27] <Willdude123> No, the yun.
[21:28] <Willdude123> http://blog.arduino.cc/2013/05/18/welcome-arduino-yun-the-first-member-of-a-series-of-wifi-products-combining-arduino-with-linux/?utm_medium=twitter&utm_source=twitterfeed
[21:28] <arko> my reaction to the yun was "meh"
[21:28] <Willdude123> Yeah.
[21:28] <Upu> yeah quite meh
[21:29] <arko> too expensive and under powered
[21:29] <Willdude123> Could be interesting.
[21:29] <arko> i wonder why have the the sheilding
[21:29] <Lunar_Lander> hello chrisstubbs
[21:29] <chrisstubbs> Evening Lunar_Lander
[21:29] <arko> is it really for rf, or are they trying to keep it under wraps?
[21:29] <Upu> wifi arko
[21:29] <arko> yah, but what about the arm processor?
[21:30] <arko> or is thats whats below it
[21:30] <arko> probably is, nvm
[21:30] <Babs__> It's very cool Upu - so unless you change the launch statistics i can carry on viewing it through the week for a continually updated view?
[21:30] <Upu> sure it updates every 6 hours or so
[21:31] <Willdude123> $69 isn't bad.
[21:31] <Babs__> excellent excellent
[21:31] <Willdude123> AFAIK, shields are of a similar price.
[21:31] <Willdude123> Seen the arduino robot Upu?
[21:31] <arko> wifi is wayy to damn expensive
[21:32] <arko> i have no idea why we dont have this tiny and cheap already
[21:32] <Upu> nope Willdude123
[21:32] <Lunar_Lander> and I wonder why arduino uno is 25 euro
[21:32] <Lunar_Lander> and atmega328 is 3 euro at farnell
[21:32] <eroomde> $22 to be patronised by your dev environment
[21:32] <Willdude123> I wonder if you could get a 3G dongle on a yun
[21:32] <eroomde> but it's $22 worth paying in the early days
[21:33] <eroomde> possibly
[21:33] <Willdude123> The yun and the robot would go quite well together, me thinks.
[21:36] <Willdude123> The yun isn't great, but I think it could be a candidate for SSDV
[21:37] <Willdude123> fsphil:^
[21:38] <chrisstubbs> usb host and some form of linux, yeah that could just work
[21:39] <Willdude123> 3g downlink ftw!
[21:39] <chrisstubbs> the raspberry pi is cheaper though :P
[21:40] <Willdude123> The arduino has a better gpio, for it is basically a gpio.
[21:40] <mfa298> 3g downlink has already been done.
[21:40] <mfa298> although I dont think it started until after landing.
[21:40] <Upu> it worked till about 300 meters
[21:40] <Upu> and picked up again about 10 mins after landing
[21:41] <Upu> showed its own recovery live :)
[21:41] <Upu> http://www.youtube.com/watch?v=XZW8g8bwmiM&list=UUGkq3Q2JQhN_ChjcPPwAW3A&index=8
[21:41] <Willdude123> I want to fly an arduino robot payload cuz yolo.
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[21:41] <arko> oh man you are lucky our irc bot isnt here
[21:41] <arko> it has trigger words like "yolo" and "swag"
[21:41] <Upu> this is a "yolo" free zone
[21:41] <arko> i should invite the bot here
[21:42] <Willdude123> Go on.
[21:42] <Willdude123> Does it make a joke about bhuddism?
[21:42] <Willdude123> *Buddhism
[21:42] <Upu> no it kicks you from the channel
[21:42] <arko> ^^
[21:43] <Willdude123> Hah
[21:44] <chrisstubbs> I need to fix my qwebirc server before work tommorow
[21:45] <chrisstubbs> if i actually want to do anything online, i have to host it myself so its not blocked
[21:45] <chrisstubbs> or i will die of boredom
[21:45] <mfa298> chrisstubbs: you just need a linux server, and learn to use screen and irssi
[21:45] <chrisstubbs> and SSH in?
[21:45] <chrisstubbs> they will be funny about that im sure
[21:45] <mfa298> that's the idea
[21:45] <Willdude123> Use shellinabox.
[21:46] <chrisstubbs> Its not the kind of place i want to be arsing around with computers
[21:46] <Willdude123> That's how I come on here at school.
[21:46] <mfa298> if you run your own ssh server you can also run it on a port that's not 22. The usual preference is 443 if you want to get through stuff
[21:46] <chrisstubbs> i got in enough for that at school :P
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[21:46] <Willdude123> Shellinabox is perfect then.
[21:47] <Willdude123> I love setting it to white text on black and people say I'm 'hacking'
[21:47] <nigelvh> The problem is when they start doing protocol inspection and it doesn't matter what port you use, they just block "SSH"
[21:47] <Willdude123> I say it's not, and then they say ' I know what hacking looks like'
[21:47] <Upu> in fairness most systems are that complex
[21:47] <Willdude123> You can set shellinabox to port 80 I think.
[21:47] <mfa298> if you're using the like of shellinabox I hope you have ssl certs on the server or you're sending everything (including username and password) in the clear over the internet
[21:48] <Willdude123> Upu, which chan has the yolo bot?
[21:48] <Upu> not this one
[21:48] <nigelvh> Though it should
[21:49] <mfa298> you really don't want to run the likes of shellinabox on port 80 (unless you really don't care about system security)
[21:49] <Willdude123> Haha good
[21:49] <Willdude123> Cause yolo.
[21:49] <Upu> don't push it Will or your posting privelges will be revoked
[21:49] <Willdude123> My school's firewall is retarded.
[21:49] <Willdude123> Sorry.
[21:50] <Upu> privileges even
[21:51] <Willdude123> I'm very sorry, I only really said it because you only live once, so I might as well live life to the full, and yolo through my life.
[21:51] <Willdude123> Sorry again.
[21:51] <Willdude123> I'm so stupid.
[21:51] <Willdude123> Retarded, useless and a pain in the ass.
[21:51] <mfa298> I doubt the firewall is broken. More likely that the techs that run it don't agree with the requests being made. The likes of HR tend to want to use technololgy to to solve their problems.
[21:52] <Upu> Willdude123
[21:52] <Upu> don't be emo either :)
[21:52] <Willdude123> Soz, I can't help it :-)
[21:52] <Lunar_Lander> btw
[21:52] <Lunar_Lander> we got something like that for years in germany
[21:52] <Lunar_Lander> we got SULO
[21:52] <Lunar_Lander> do you know what that is?
[21:53] <Willdude123> mfa298: They went through and blocked pretty much every port that isn't 80 under 100.
[21:53] <SpeedEvil> then there is the fun that it can be required legally for businesses to log
[21:53] <Willdude123> But 4200, the shellinabox port, not blocked.
[21:53] <Lunar_Lander> SULO is a company that makes trash cans xD
[21:54] <mfa298> there's not that many ports under 100. And some are often blocked for good reason (port 25)
[21:54] <Willdude123> I soo want to put a white flag in the french classroom.
[21:54] <Lunar_Lander> what is 25 again?
[21:54] <mfa298> smtp
[21:55] <Lunar_Lander> ah mail output?
[21:55] <Willdude123> Upu, do you think I should get an arduino robot?
[21:55] <Willdude123> I think it has swag.
[21:56] <Upu> if its of interest why not, what about Lego ?
[21:56] <Willdude123> Mindstorms?
[21:56] <Upu> Is it Mindstorms ?
[21:57] <Upu> I built a robot from Lego once
[21:57] <Upu> and a card reader
[21:57] <Willdude123> http://arduino.cc/en/Main/Robot
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[21:57] <chrisstubbs> bye me
[21:58] <Willdude123> Oh, no but I'd like to get a mindstorm robot too maybe.
[21:58] <chrisstubbs> Night all
[21:58] <arko> did they announce the price on the bot?
[21:58] <arko> night
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[21:59] <Willdude123> Arduino is now on wheels, come ride with us!
[21:59] <mfa298> that looks like a slightly more advanced version of the old logo robots.
[21:59] <Willdude123> Sounds so sexual.
[21:59] <Willdude123> Upu, what's your verdict?
[22:00] <Upu> I'd probably do it myself :)
[22:00] <Upu> make a Big Trak 2013 :)
[22:00] <Upu> http://en.wikipedia.org/wiki/Big_Trak
[22:00] <Upu> brb reboot
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[22:08] <fsphil> ooh they made an expensive raspi
[22:09] <arko> it's weird that it's an underpowered rpi
[22:14] <fsphil> Big Trak looks cool
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[22:21] <gonzo_> does it have the same sounds as the original?
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[22:22] <Lunar_Lander> back
[22:22] <fsphil> ooh it does sounds?
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[22:28] <Willdude123> I wouldn't write it off just yet.
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[22:30] <DrLuke> "Digital Compass provides deviation from the geographical north in degrees" Ouch
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[22:31] <Willdude123> Don't people expect compasses to do that.
[22:31] <Willdude123> It s
[22:31] <Willdude123> It's badass, but you know yolo.
[22:31] <DrLuke> it shows the deviation from magnetic north
[22:31] <DrLuke> but certainly not geographic north
[22:31] <mfa298> I expect the compass to give me deviation from magnetic north
[22:31] <mfa298> Damn beaten to it.
[22:31] <qyx_> 417 expectation failed
[22:31] <DrLuke> haha
[22:32] <mfa298> what you really need is a compass that can show you the deviation from the form of north used on the map/chart being used.
[22:32] <DrLuke> what
[22:33] <mfa298> alternativly just use your brain to add/subtract the correct deviation.
[22:34] <Willdude123> True north is fine, isn't it?
[22:35] <DrLuke> mfa298: that's not always easy
[22:35] <DrLuke> deviation is different everywhere
[22:35] <DrLuke> also I bet the motors and speaker create a lot of magnetic noise
[22:35] <Willdude123> The yun looks pretty cool.
[22:35] <mfa298> That depends on what you're using. True north is different to magnetic north and if you're using an OS map it's different again to grid north.
[22:35] <DrLuke> I wouldn't trust the readings of that sensor below an accuracy of 5°
[22:36] <Willdude123> I wanna add a gps to one.
[22:36] <mfa298> DrLuke: and (at least for OS maps) can change over time.
[22:36] <Willdude123> OMG.
[22:36] <Willdude123> Robot moving fireworks launcher.
[22:36] <DrLuke> that sounds illegal
[22:36] <DrLuke> I like it
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[22:50] <Lunar_Lander> hi DrLuke
[22:50] <DrLuke> hi
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[23:28] <jarod> http://78.129.167.24:9920/listen.pls 87.5 MHz FM - Amsterdam's #1 - DanceRadio.NL - Ether Audio :D
[23:32] Action: mfa298 wonders how that is relevant to high altitude. Is it just that it's from Amsterdam so are probably high and they have no altitude ?
[23:32] <jarod> miss paste :(
[23:32] <jarod> but yes.... the highest then :P
[23:56] <Arithmetic> i wouldn't mind knowing amsterdam's english equivalent to bbc news radio offerings
[23:57] <jarod> none :/
[23:58] <Arithmetic> there's apparently some amsterdam news on radio in english, which those in the know appreciate. bbc might be the wrong analogy
[00:00] --- Mon May 20 2013