highaltitude.log.20151012

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[04:59] <ghsbill> Huge thank you to daveake and particularly to rocketboy, whose surprise appearance at the end of saturday's chase ramped up excitement massively
[04:59] <ghsbill> school absolutely buzzing over the weekend - brilliant!
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[08:19] <gonzo_> not sure if I lost sign from UBSEDS11, or if it was local QRM. Found a huge mess on that freq when I came back this morn
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[09:04] <craag> Nothing heard on either freq from websdr
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[09:42] <gonzo_> it would have been just about out of my local horizon this morn, but there was a wide, strong 100% duty signalright over the top.
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[09:48] <michal_f> hi
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[10:07] <james> hello
[10:08] Nick change: james -> Guest14763
[10:08] <Guest14763> is there anyone here
[10:08] <craag> hi
[10:08] <eroomde> yes
[10:08] <eroomde> plenty
[10:09] <Guest14763> i am looking at releasing a weather balloon and camera for my uni dissertation
[10:10] <eroomde> you've come to the right place
[10:10] <Guest14763> excellent
[10:10] <Guest14763> my names James
[10:10] <daveake> also excellent
[10:10] <eroomde> james is a good, solid name for ballooning
[10:11] <Darkside> lol
[10:11] <Guest14763> i take it eroomde is a bot
[10:11] <Guest14763> lol
[10:11] <UpuWork> haha
[10:11] <daveake> we have our suspicions
[10:11] <UpuWork> awesome
[10:11] <Darkside> Guest14763: yes
[10:11] <Darkside> he is a bot
[10:12] <Darkside> don't trust anything he says
[10:12] <eroomde> i certainly feel like it sometimes
[10:12] <SpacenearUS> New vehicle on the map: 03M0SBU-11 - 12http://tracker.habhub.org/#!qm=All&q=M0SBU-11
[10:12] <Guest14763> so this will be my first balloon release, i used to do model rockets when i was younger. I always wanted to put a camera in back then and now it possible!
[10:12] <craag> It lives!
[10:12] <craag> richardeoin: ^^
[10:13] <eroomde> Guest14763: yep, very possible.
[10:13] <UpuWork> oh wow look where that got too
[10:13] <mattbrejza> wasnt running at night then?
[10:13] <eroomde> what is your subject and university?
[10:13] <eroomde> and does that influence the sort of balloon project you want to do?
[10:14] <Guest14763> Multimedia Production BSc at Oxford Brookes University. Its part of my double honours component
[10:14] <eroomde> hmm, if only there was someone who'd done a few balloon flights who lived in Oxford
[10:14] <eroomde> a flesh and blood human rather than a bot
[10:15] <Guest14763> I am wanting to release with 6 gopro cameras attached so I can record 3d vison
[10:15] <daveake> if only
[10:15] <craag> mattbrejza: Looks like it might have woken off solar
[10:15] <craag> battery: 0V, solar: 1.12V
[10:15] <mattbrejza> ah
[10:17] <eroomde> Guest14763: it's worth emphasising that you should be prepared, financially and emotionally, to not get your payload back
[10:17] <Guest14763> this is what i am worried about. do you recommend any good trackers
[10:19] <craag> Using radio trackers is by far the most successful option, however that's not going to save you from a small chance of it landing in a pond/lake/somewhere inaccessible.
[10:19] <craag> Good preparation will reduce the chance, but never remove it.
[10:20] <Guest14763> I see. this is why i was thinking go pro cameras in their weatherproof cases. i am allowed to use gps in uk?
[10:20] <craag> I think you need to do some reading :)
[10:20] <craag> !wiki
[10:20] <SpacenearUS> 03craag: Here be the wiki, arr: 12http://ukhas.org.uk
[10:21] <eroomde> if it lands out to sea it's basically not coming back
[10:21] <eroomde> we have a flight predictor that lets you see the approximate flight path in advance
[10:21] <craag> http://www.daveakerman.com/?p=1732
[10:22] <craag> ^^ Those two links have plenty of information, try dave's guide first for an overview and introduction.
[10:22] <craag> Then our wiki contains a lot of knowledge on certain gps modules and stuff
[10:23] <Guest14763> thanks chaps. I have been reading some but will read some more :)
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[10:24] <Guest14763> do you think my idea is mad or doable?
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[10:24] <craag> It's certainly doable, could be expensive if you lose it!
[10:25] <gonzo_> there are cheaper cameras
[10:26] <Guest14763> and i'm thinking there is too much weight with 6 go pro. is there anything else you would recommend. thanks for your help
[10:27] <eroomde> it's not too heavy with 6 gopros
[10:27] <eroomde> it's just a wodge of cash
[10:27] <gonzo_> there are also lots of trees, so there is a poss that it may be on land, but inaccessible
[10:27] <Guest14763> i see
[10:27] <eroomde> but it's technically no problem
[10:27] <gonzo_> depends who is paying!
[10:28] <eroomde> when do you need to launch by Guest14763?
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[10:33] <Guest14763> I have 4 months max
[10:33] <eroomde> ok, so need to get cracking
[10:33] <pd3t> !flights
[10:33] <SpacenearUS> 03pd3t: Current flights: 03ForestHAB 1 10(59d0)
[10:33] <eroomde> you'll need to find somewhere from which to launch
[10:33] <eroomde> oxford is hard but around oxford is doable
[10:34] <Guest14763> I am having to pay for it myself, so would have to loose it. good advice
[10:34] <Guest14763> are you from oxford eroomde
[10:35] <gonzo_> would cheaper 808 cams be cheaper?
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[10:35] <eroomde> Guest14763: yes
[10:35] <Guest14763> ahh fab
[10:37] <Guest14763> i would like good resolution images as i would like to create the feeling of being there when using the headset
[10:37] <eroomde> if you want a brain dump over a pint then that's an option
[10:37] <eroomde> the video stuff is entirely up to you
[10:37] <eroomde> i can help you plan all the balloon and tracking and operations side though
[10:37] <Guest14763> that would be fantastic please eroomde :)
[10:38] <eroomde> what to buy, where to buy it from, how to connect it all up etc
[10:38] <Guest14763> that would be a life saver!
[10:39] <eroomde> my only free night this week is tomorrow, otherwise it's next week
[10:39] <Guest14763> tomorrow would be fantastic please
[10:39] <eroomde> where do you live in ox?
[10:39] <Guest14763> i am based in headington, how about you
[10:39] <eroomde> Osney Island
[10:39] <Guest14763> fab
[10:40] <eroomde> town centre?
[10:40] <Guest14763> i can meet you anywhere
[10:40] <garymortimer> Under the railway clock red rose
[10:40] <daveake> Look for the bot
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[10:40] <eroomde> punter on osney island? It's good but much quieter than a town centre pub espesh as its freshers week
[10:40] <eroomde> https://www.youtube.com/watch?v=S7KujrsUB1w&feature=youtu.be&t=3h49m57s
[10:41] <eroomde> watch this video - it's less than 15 mins and explains important parachute stuff which you'll want for stable video
[10:41] <eroomde> also that's me so you'll know what i look like
[10:41] <garymortimer> Do we know if ForestHAB is still on?
[10:41] <Guest14763> yes please. what time would be good for you
[10:41] <eroomde> The Punter at 7pm?
[10:41] <eroomde> bring paper :)
[10:42] <Guest14763> fantastic!! I shall see you tomorrow at The Punter at 7pm
[10:42] <Guest14763> Thank you very much
[10:42] <eroomde> I've just sent you a PM with my number
[10:46] <Guest14763> Thanks Ed
[10:49] <eroomde> no probs
[10:49] <eroomde> see you then
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[11:09] <Oddstr13> what kind of signal does this look like? http://i.imgur.com/a8DqmKp.png
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[11:12] <Oddstr13> the frequency is used for meter readinds according to "Fribruksforskriften" http://lovdata.no/forskrift/2012-01-19-77/§7
[11:13] <richardeoin> .whereis M0SBU-11
[11:13] <SpacenearUS> 03richardeoin: 03M0SBU-11 is over 03Bay Of Biscay 10(45.786,-4.5511) at 038685 meters
[11:13] <richardeoin> lul wut how did it get there?
[11:13] <richardeoin> morning craag
[11:13] <Miek> Oddstr13: maybe 2FSK? if you take a baseband recording then i'll take a closer look
[11:13] <Oddstr13> Miek: been recording for almost 10min now
[11:13] <craag> it tried skinny dipping in the channel last night, but it was too cold
[11:13] <craag> so heading to spain instead
[11:14] <richardeoin> prefectly reasonable decision
[11:14] <Oddstr13> Miek: gqrx I/Q recordings are fine, right?
[11:14] <richardeoin> I wasn't expecting 8685m altitude though
[11:15] <Miek> Oddstr13: i didn't know gqrx could do I/Q recordings, i thought it was audio only. but if it can, then it should be fine
[11:16] <Oddstr13> compressing into a 7z archive, this might take a while
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[11:16] <Oddstr13> but not as long as it would take to upload that 7.1GB file >.<
[11:17] <Oddstr13> also, by metering I would assume they mean power usage and such
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[11:21] <Oddstr13> made a 30s recording instead. :P
[11:32] <Oddstr13> Miek: http://satomi.openshell.no/tmp/gqrx_20151012_111811_444464002_1500000_fc.raw.zip
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[11:35] <fsphil> that's not 7z :)
[11:35] <Oddstr13> fsphil: ik
[11:35] <Miek> Oddstr13: yup, 2FSK http://i.imgur.com/8arDmMg.png
[11:36] <Oddstr13> fsphil: I started compressing the 10min 7GB file with 7z, and then decided I'd record a shorter sample instead. ended up zipping it :P
[11:36] <fsphil> yeah, 7z is slow
[11:37] <Oddstr13> heh, so, basically, a fast rtty-like signal
[11:38] <Miek> yeah
[11:43] <Oddstr13> heh, funny how FFT size affects how the signal looks
[11:44] <Oddstr13> nice program btw Miek
[11:44] <Miek> cheers :)
[11:46] <Oddstr13> didn't think I'd find it in AUR, seeing as first release was 9 days ago, but there it was! :P
[11:47] <Miek> oh nice, i didn't know about that
[11:48] <Oddstr13> having a look at the 434MHz ISM band now
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[11:55] <Oddstr13> http://i.imgur.com/4fjNukj.png
[11:55] <Oddstr13> ^
[11:55] <Oddstr13> ^^
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[11:57] <Oddstr13> OOK, kinda knew that from before tho
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[11:58] Nick change: mazzanet_ -> mazzanet
[11:59] <SpacenearUS> New vehicle on the map: 03CHANGEME - 12http://tracker.habhub.org/#!qm=All&q=CHANGEME
[11:59] <daveake> oops
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[12:00] <Oddstr13> :D
[12:00] <daveake> so someone actually went to the trouble of creating a payload doc for "CHANGEME" ???
[12:01] <Oddstr13> haha
[12:01] <UpuWork> lol
[12:02] <craag> time to change the source to "IMLAZY"
[12:03] <daveake> :)
[12:03] <SpacenearUS> New vehicle on the map: 03PISKY - 12http://tracker.habhub.org/#!qm=All&q=PISKY
[12:03] <adamgreig> do they ship pre-programmed or are people programming them with CHANGME and just not touching the source before hitting program?
[12:03] <daveake> CHANGEME is in the default config file
[12:04] <mattbrejza> !whereis CHANGEME
[12:04] <SpacenearUS> 03mattbrejza: 03CHANGEME is near 03Herefordshire, UK 10(51.95027,-2.54442) at 03138 meters
[12:04] <adamgreig> oh, pits
[12:04] <adamgreig> right
[12:04] <daveake> and people follow the instructions
[12:04] <daveake> ^ hahahaha
[12:04] <adamgreig> could you make the default config file also not turn on the radio? :P
[12:04] <daveake> yup :)
[12:04] <mattbrejza> although they would never know...
[12:04] <daveake> this test is me btw ... just wasn't expecting it to appear on the map
[12:04] <mattbrejza> since the radio isnt asking them to change it
[12:04] <Oddstr13> UBSEDS 10 & 11 died?
[12:06] <mattbrejza> aprs now Oddstr13
[12:06] <mattbrejza> unless they died in the last few hours
[12:06] <adamgreig> oh lol :P
[12:06] <Oddstr13> was refering to their altitude tho
[12:07] <Oddstr13> 455m and 1237m
[12:07] <mattbrejza> M0SBU-11 is UBSEDS11
[12:08] <Oddstr13> yay for confusion
[12:08] Nick change: fl_0 -> fl_0|afk
[12:08] <mattbrejza> !ping M0SBU-11
[12:08] <SpacenearUS> 03mattbrejza: Last contact with 03M0SBU-11 was 03a few seconds ago
[12:08] <mattbrejza> woo
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[12:41] <Laurenceb> https://www.kickstarter.com/projects/1649613507/the-self-re-charging-ups-12-kw-max-timeless-autono
[12:46] <gonzo_> may a fool be parted from his money
[12:47] <gonzo_> I see that 'realisation' is still on the to-do list
[12:48] <michal_f> you could send "ChangeCallsign" instead of real telemetry
[12:49] <fsphil> self destruct
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[13:12] <Oddstr13> what's up with websites requiring the whole slug field in addition to the id in the prev. path component?
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[13:27] <Oddstr13> any idea of what this could be? http://i.imgur.com/UFq0Qji.png http://i.imgur.com/W0YazTW.png
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[14:02] <SpacenearUS> New vehicle on the map: 03N1YIP-11 - 12http://tracker.habhub.org/#!qm=All&q=N1YIP-11
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[14:04] Nick change: fl_0|afk -> fl_0
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[14:09] <wfn> has anyone been involved in considering HAB flight design with the balloon not bursting for significantly longer time (a few hours+)? would this not at all be possible without proper industrial design and budget?
[14:10] Action: wfn looks at http://habhub.org/calc/
[14:11] <fsphil> there have been a fair few flights up longer than a few hours. a few up at the moment in fact
[14:11] <wfn> are they on the projects page? will check it out..
[14:11] <fsphil> don't recall was the record is, several months at least
[14:11] <eroomde> some have been up for weeks
[14:12] <wfn> so it is possible under amateur budget and design, in principle :)
[14:12] <eroomde> yes
[14:12] <eroomde> and in practice
[14:12] <eroomde> but it is strongly a function of what altitude to what weight you want to go
[14:12] <eroomde> 20g to 15ish km is reletively easy
[14:12] <eroomde> compared to 2kg to 35km, say
[14:13] <wfn> yes, fair enough, hm
[14:13] <wfn> so basically would have to pre-decide on these targets
[14:13] <wfn> or tune them depending on how long one would want the balloon to stay up
[14:13] <eroomde> yes
[14:13] <eroomde> well not so much the latter
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[14:14] <eroomde> there is some engineering in floating for 10hrs vs 10 days vs 10 weeks
[14:14] <eroomde> but really just getting any kind of a stable float to initialise is the hard bit when you wish to go higher with bigger payloads
[14:15] <wfn> fair enough.
[14:15] <wfn> that makes sense, thanks eroomde
[14:15] <wfn> btw in terms of CAA regulations, would this have any particular implications? would this fit within the HAB exemption/permission framework?
[14:15] <wfn> (IANAL mode assumed by default)
[14:16] <eroomde> yep should be fine so long as you stick to the usual hab rules
[14:16] <eroomde> descent under parachute etc
[14:17] <eroomde> note there is an exemption for things that remain <2m in any linear dimension throughout the flight
[14:17] <eroomde> that is the loophole most of the 20g/15km pico flights exploit
[14:17] <wfn> oh, is this an exemption to the point where 28day permission is not even needed? (probably still advised to contact local ATC etc)
[14:17] <eroomde> yes
[14:17] <eroomde> it's a complete exemption
[14:18] <wfn> nice
[14:18] <eroomde> just let it go from the back garden like you would a happy-3rd-birthday balloon
[14:18] <wfn> :)
[14:18] <fsphil> it's nice being able to just walk outside and let go
[14:21] Action: wfn checks out http://chris-stubbs.co.uk/wp/?p=319
[14:21] <wfn> so basically a battery and a transmitter
[14:21] <wfn> on a small balloon. very neat
[14:21] <fsphil> or solar if you expect it to go for more than a few days
[14:22] <wfn> perhaps that's the low-budget entry point for a complete amateur :P
[14:22] <wfn> yeah, wouldn't that be cool
[14:22] <fsphil> yes start with the battery :)
[14:22] <wfn> so yeah stabilization and float are teh main worry i suppose
[14:23] <craag> This + solar is currently floating west of France: http://www.bristol-seds.co.uk/pico-tracker/
[14:24] <eroomde> some have made it round-the-world multiple times
[14:24] <wfn> wonder if it's possible to have both gps and radio be bundled up in a 20g payload. i mean microcontroller etc
[14:24] <adamgreig> oh yea
[14:24] <wfn> ....yeah that's pretty super neat
[14:24] <adamgreig> almost said easily but not exactly
[14:24] <chris_99> that uses APRS, how where they able to launch that from the UK?
[14:25] <craag> chris_99: geofenced
[14:25] <adamgreig> but like, my gps+radio+microcontroller+solar charger is 2.3g without batteries
[14:25] <fsphil> geofence
[14:25] <adamgreig> the electronics ain't heavy
[14:25] <craag> only switched on outside uk
[14:25] <chris_99> oooh
[14:25] <chris_99> cool
[14:25] <craag> more of UBSEDS/M0SBU launch here: https://twitter.com/bristolseds
[14:26] <fsphil> I keep seeing the Blackmagic Probes. should get those
[14:26] <adamgreig> yes
[14:26] <adamgreig> well
[14:26] <adamgreig> yes they are great
[14:26] <adamgreig> get some
[14:27] <eroomde> i have a couple
[14:27] <eroomde> they're good
[14:27] <adamgreig> I'm thinking of building one in to my next big things
[14:28] <adamgreig> just have a usb port on the board that does programming via a bmp, mass storage access, and usb serial port shell
[14:28] <adamgreig> and power, why not
[14:28] <adamgreig> all you need now is a usb cable, no sd card reader, no bmp, no swd cable, no usb-serial converter
[14:28] <adamgreig> which would be quite nice
[14:29] <richardeoin> My new bmp boards turned up this morning :)
[14:29] <mattbrejza> does it support the f0?
[14:29] <adamgreig> any new modifications or same as your last design?
[14:29] <adamgreig> yea it does mattbrejza
[14:29] <adamgreig> (what do you use?)
[14:29] <mattbrejza> (as in using the f0 on the bmp board)
[14:29] <adamgreig> oh
[14:30] <adamgreig> shrug
[14:30] <adamgreig> haven't looked into it
[14:30] <richardeoin> I've added an adjustable regulator
[14:30] <adamgreig> you could probably make it work
[14:30] <adamgreig> richardeoin: so you can tpwr 1v8?
[14:30] <mattbrejza> theres that new £1.20 usb f0 that would be nice
[14:30] <mattbrejza> almost cheaper than the swd connector from toby...
[14:30] <adamgreig> lol yea
[14:30] <adamgreig> that would be nice
[14:30] <adamgreig> don't see why it couldn't support it
[14:30] <richardeoin> yes, tpwr 1.8 will be very nice
[14:30] <adamgreig> mgiht need some driver tweaks
[14:30] <adamgreig> richardeoin: mm yea. is the voltage controlled over gdb or..?
[14:31] <richardeoin> that's the plan, it's controlled by a PWM pin
[14:31] <adamgreig> oh interesting
[14:31] <adamgreig> nice
[14:31] <richardeoin> haven't written the software yet but shouldn't be a problem
[14:31] <adamgreig> mm
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[14:32] <adamgreig> sounds good
[14:32] <adamgreig> what's your bom come to now?
[14:33] <craag> mattbrejza: Have you got a link to your shrouded header on toby?
[14:34] <eroomde> this is the ftsh-105-l-dv-k from samtec?
[14:34] <mattbrejza> yea
[14:34] <eroomde> i wish farnell would stock the damn thing
[14:34] <eroomde> i buy tubes of 100 from digikey
[14:34] <adamgreig> FTSH-105-01-F-D-K
[14:34] <adamgreig> from Toby
[14:35] <eroomde> the -K is the important part
[14:35] <adamgreig> http://www.toby.co.uk/content/catalogue/products.aspx?series=FTSH-1xx-xx-xx-xx-xx-xx
[14:35] <mattbrejza> shroud?
[14:35] <eroomde> yeah
[14:35] <adamgreig> yea
[14:35] <richardeoin> adamgreig: I've added a LT1763 reg and an AD8655, also some ESD suppression stuff
[14:35] <eroomde> i think i pay more than that
[14:35] <eroomde> hmm
[14:35] <richardeoin> Maybe an extra 6 GBP of stuff
[14:35] <adamgreig> what's the ad8655 for?
[14:35] <mattbrejza> although all my swd headers are the same orientation to the board edge so if its just me the shroud isnt needed
[14:35] <eroomde> if you want to add galvanic isolation i'd be forever happy
[14:35] <adamgreig> dangerous game
[14:36] <richardeoin> \me opens eagle
[14:36] <eroomde> but i seem to be the only one that wants this
[14:36] <richardeoin> damn I'm a irc noob
[14:36] <adamgreig> I would like this but it's a bit of a pain
[14:36] <adamgreig> bidirectional data lines are a pain
[14:36] <mattbrejza> LPF on the pwm? (AD part)
[14:36] <mattbrejza> there are off the shelf parts for the isolation though
[14:36] <mattbrejza> from last time we discussed this
[14:36] <adamgreig> yea
[14:36] <mattbrejza> and only a few £
[14:36] <adamgreig> it's doable
[14:36] <mattbrejza> for lots of channels
[14:37] <mattbrejza> using RF isolation...
[14:37] <adamgreig> I'm more tempted to just have the USB port idea I said above, and stick the AD USB isolator on
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[14:37] <eroomde> yeah
[14:37] <mattbrejza> actually the dangerous part of not having the shroud is a 'off by 1 row error' rather than back to front
[14:37] <eroomde> that would be my solution
[14:37] <eroomde> ad usb isolator
[14:37] <adamgreig> then you get galvo isolated mass storage+usb shell+programming/debug
[14:37] <richardeoin> yet mattbrejza is correct, it's a LPF
[14:37] <adamgreig> does the stm32 you're using not have a dac?
[14:38] <adamgreig> I've put the tagconnect footprint on my just-left-board-house PCB to try it out for the first time
[14:38] <adamgreig> but potentially this solves the shrouded connector issue nicely
[14:38] <adamgreig> not ideal for every situation though
[14:38] <mattbrejza> i think isolation of swd will be cheaper than usb though
[14:38] <adamgreig> needs a lot of vertical space above the PCB for one thing, which is rubbish in enclosed spaces
[14:38] <richardeoin> I'm using off the shelf esd isolation things http://uk.farnell.com/webapp/wcs/stores/servlet/Search?st=1506629
[14:38] <adamgreig> isolating the swd is defo cheaper than usb
[14:38] <adamgreig> usb isolation is costly
[14:38] <richardeoin> *not inolation
[14:38] <richardeoin> *not isolation
[14:38] <adamgreig> but if you have the bmp on your board along with other USB functionality...
[14:40] <mattbrejza> this bmp version of yours is like an afternoons work (once you work out what you want on it)
[14:40] <adamgreig> yea I know
[14:40] <adamgreig> that working out part is trickier
[14:40] <mattbrejza> (yurt?)
[14:40] <adamgreig> would like it done before then but if not it's a godo time to do it
[14:40] <adamgreig> wanted to mostly work on supervide firmware at yurt
[14:40] <adamgreig> or predictor
[14:40] <adamgreig> or shrew. lol
[14:40] <mattbrejza> lol
[14:41] <mattbrejza> msgpack & habitat? :P
[14:41] <adamgreig> well volunteered
[14:42] <eroomde> a dialable dc-dc for target power would be sexytime too
[14:42] <eroomde> but a big BOM hit
[14:42] <eroomde> but just thinking outloud, would be nice
[14:42] <craag> thanks for ftsh link adamgreig
[14:42] <adamgreig> dialable isolated dc-dc
[14:42] <adamgreig> would be well nice
[14:42] <adamgreig> but like... as soon as your tpwr needs get that complicated you probablyneed an actual psu for the project
[14:42] <eroomde> i've often thought a usb lab psu would be nice
[14:42] <eroomde> yes
[14:43] <adamgreig> craag has quite a nice usb lab psu
[14:43] <adamgreig> well
[14:43] <adamgreig> is that online anywhere craag ?
[14:43] <craag> ? I thought it was andrew who had that?
[14:43] <adamgreig> ...hmm yes
[14:43] <mattbrejza> not isolated iirc?
[14:43] <adamgreig> sorry, forgot whose that was
[14:43] <adamgreig> no don't think that was isolated
[14:44] <adamgreig> looked nice though. cute OLED screen
[14:44] <eroomde> usb3 is like 5W or something
[14:44] <eroomde> it's decent for many things
[14:44] <adamgreig> yea but have you SEEN the usb3 connector
[14:44] <adamgreig> sod othat
[14:44] <mattbrejza> usb 3.1 is 100W
[14:44] <eroomde> the double-humped B thing?
[14:44] <adamgreig> no
[14:44] <adamgreig> C
[14:44] <adamgreig> oh I guess USB3 5W is alright
[14:44] <adamgreig> USB C's 100W with 3.1's power delivery spec though...
[14:45] <mattbrejza> and not 5V, i forget what it is thouigh
[14:45] <mattbrejza> would be amusing if some usb 3.1 charger had a bug which made it accidently send 20V to a non 3.1 device
[14:45] <adamgreig> the USB B 3.0 connector is alright
[14:45] <adamgreig> can get it PTH even and it's a bit sturdy
[14:46] <eroomde> yes
[14:46] <eroomde> if i made one it'd be big though
[14:46] <eroomde> it'd have to have nice low-noise 10-turn pots and so on
[14:46] <eroomde> i'm not really the right person to make such a thing
[14:46] <adamgreig> http://www.farnell.com/datasheets/1965372.pdf
[14:47] <adamgreig> actually that's not as bad as I remember
[14:47] <adamgreig> PTH version quite reasonable
[14:47] <adamgreig> unclear if you actually have to do both though
[14:47] <mattbrejza> its half PTH and smd...
[14:47] <adamgreig> yea
[14:47] <adamgreig> reversible connector and all that
[14:47] <adamgreig> yea, you need to connect all 12 PTH and all 12 SMT bits
[14:47] <mattbrejza> well it uses all the pins
[14:48] <eroomde> might just be for mechanical strength
[14:48] <mattbrejza> just it works out which way round it is and routes the signals accordingly
[14:48] <adamgreig> nah eroomde it's a 24 pin connector
[14:48] <mattbrejza> well D+/D- are duplicated
[14:48] <adamgreig> and gnd and stuff
[14:48] <mattbrejza> and multiple power
[14:48] <adamgreig> yea
[14:48] <mattbrejza> then 4 differential lanes?
[14:48] <adamgreig> right
[14:48] <mattbrejza> and 4 detect
[14:48] <eroomde> oh i see, so the smd stuff for the data lanes?
[14:48] <adamgreig> no
[14:48] <eroomde> i'm not doing well here
[14:49] <adamgreig> the table of 1-12 and A and B
[14:49] <adamgreig> on the 2nd page
[14:49] <adamgreig> one is SMT and one is PTH
[14:49] <adamgreig> depending on which way around you plug the connector
[14:49] <adamgreig> but note they are different signals
[14:49] <adamgreig> (which of (A, B) maps to (SMD, PTH) pads depends on connection orientation)
[14:50] <mattbrejza> hmm wheres that document
[14:50] <adamgreig> so you have to wire about 18 signals to your USB chip?
[14:50] <mattbrejza> the one with the useless graph
[14:50] <adamgreig> it's not your grandfather's V, D+, D-, GND
[14:50] <adamgreig> good old USB B sockets
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[14:51] <mattbrejza> whats that farnell part no?
[14:51] <adamgreig> 1965372 ?
[14:52] <adamgreig> it's like, in the url
[14:52] <mattbrejza> its not
[14:52] <adamgreig> http://onecall.farnell.com/multicomp/mc001003/usb-type-c-24pos-rcpt-smt-th/dp/2498949
[14:52] <adamgreig> 2498949
[14:52] <adamgreig> sorry yea, weird, wonder why their pdfs are numbered differently
[14:52] <mattbrejza> why not...
[14:52] <mattbrejza> farnell logic
[14:52] <adamgreig> omg, could put a usb c connector on this BMP
[14:53] <adamgreig> haha
[14:53] <adamgreig> still works with just vbus, d+, d- and gnd
[14:53] <adamgreig> not sure autodetecting rotation does though...
[14:53] <mattbrejza> you just connect d+ from row A and B
[14:53] <mattbrejza> same for d-
[14:53] <adamgreig> oh yea of course
[14:53] <adamgreig> nice
[14:53] <mattbrejza> i guess
[14:53] <adamgreig> well that'd be cool
[14:54] <adamgreig> and the mirrored VBUSs and GNDs
[14:54] <adamgreig> easy
[14:54] <mattbrejza> are there any cheap 3.1 cables yet?
[14:54] <adamgreig> the only usb c connectors on onecall are either US stock or awaiting delivery
[14:55] <adamgreig> not quite there yet
[14:55] <adamgreig> http://www.amazon.co.uk/Standard-Charging-Reversible-Supported-BTV08BK/dp/B011TH8BB2 £6
[14:55] <adamgreig> weirdly it's A-C not C-C
[14:55] <adamgreig> C-C seems a bit more niche
[14:56] <adamgreig> http://www.amazon.co.uk/Rankie®-Connector-Reversible-Backward-Compatible/dp/B010SG8OFI £5.45
[14:56] <adamgreig> 3A, 100W -> 33V lol
[14:56] <adamgreig> that would definitely do bad things
[14:57] <eroomde> still within the low voltage directive
[14:57] <adamgreig> lol
[14:57] <adamgreig> not enough to fry your rabbit when it gets the cable
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[14:58] <adamgreig> getting a new phone in a couple weeks with usb c
[14:58] <adamgreig> so that will be fun
[14:59] <mattbrejza> if you plug two of those new macbooks with a usbC - usbC cable, will they agree that one should charge the other?
[14:59] <adamgreig> yea
[14:59] <adamgreig> depends which one you plug in first aiui
[14:59] <wfn> (..huh, so what is APRS? are all APRS messages relayed through satellites? or is it also ground to ground?)
[14:59] <mattbrejza> oh, so they know they have a cable but no device at the end
[14:59] <adamgreig> APRS is amateur packet radio system (or more snarkily position reporting system)
[14:59] <mattbrejza> odd
[15:00] <adamgreig> but it's just radio to radio on the ground wfn
[15:00] <adamgreig> no satellites involved
[15:00] <adamgreig> often a radio will receive a packet and upload it to the internet
[15:00] <adamgreig> mattbrejza: well it's just a latch in the connector
[15:00] <adamgreig> like sd cards or something
[15:00] <adamgreig> in theory I guess they could pop up a UI dialogue
[15:00] <wfn> aha, ok, thanks :) got confused what with the mention and links to their research/school satellite links on aprs.org
[15:00] <adamgreig> "charge / get charged" lol
[15:01] <mattbrejza> i thought one of the id pins would do it
[15:02] <adamgreig> shrug
[15:06] Nick change: fl_0 -> fl_0|afk
[15:07] <SpacenearUS> New vehicle on the map: 03ria-20a_chase - 12http://tracker.habhub.org/#!qm=All&q=ria-20a_chase
[15:14] <wfn> regarding picoflights / <= 20g payloads, have people been able to fit any additional sensors (at the very least temperature)? i suppose most of those sensors are really tiny and lightweight..
[15:14] <adamgreig> temperature is interesting. it's easy and cheap and small to measure the temperature of your electronics
[15:15] <adamgreig> (in fact most microcontrollers have an internal temperature sensor built in)
[15:15] <adamgreig> but measuring air temperature is in general a lot harder and fiddlier and not usually done
[15:15] <adamgreig> picos with solar cells will typically measure the cell voltage which can give an idea of amount of light, which is a sort of sensor
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[15:20] <starsky13577777> Test
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[15:24] <wfn> adamgreig: fair enough, thanks
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[15:24] <wfn> air pressure would obviously be interesting.. need to investigate
[15:24] <wfn> starsky135: you probably need to set some kind of keepalive in your android irc app
[15:25] <starsky135> Keeps crashing, working on it.
[15:26] <adamgreig> air pressure is pretty straightforward but not hugely interesting
[15:26] <adamgreig> bmp180 or ms5611 sensors are small and light and work fine, but like
[15:26] <adamgreig> you will only confirm the standard atmosphere model against your gps altitude reading
[15:26] <adamgreig> maybe you could spot some weather patterns
[15:27] <mattbrejza> perhaps balloon-air differential pressure is more interesting
[15:27] <adamgreig> yea
[15:27] <adamgreig> that would be cool
[15:31] <richardeoin> ^^ should be on our next flight
[15:32] <richardeoin> going for the ms5607 sensor http://www.farnell.com/datasheets/1756127.pdf
[15:33] <richardeoin> helpfully stocked by farnell unlike the bmp180
[15:33] <eroomde> that's not differential though
[15:33] <adamgreig> why the ms5607 over the ms5611?
[15:33] <Laurenceb> the honeywell truestability range look good
[15:33] <Laurenceb> I've used them for pitot
[15:35] <eroomde> omega make nice stuff too
[15:36] <richardeoin> eroomde: we're naively using two separate sensors, one inside the balloon and one out
[15:37] <richardeoin> adamgreig: tbh I hadn't seen the ms5611
[15:37] <adamgreig> also on farnell and seems more popular
[15:37] <eroomde> richardeoin: ok
[15:37] <eroomde> well, not ok, as you sort of ackoweledge
[15:38] <eroomde> but in a pinch
[15:38] <adamgreig> the 5611 is twice the resolution
[15:38] <wfn> > balloon-air differential pressure
[15:38] <wfn> ah, that's a nice idea..
[15:38] <adamgreig> of the 5607
[15:38] <adamgreig> same otherwise though so you could just swap them out if you've not soldered them on yet
[15:39] <Laurenceb> these are... interesting
[15:39] <Laurenceb> http://www.first-sensor.com/en/products/pressure-sensors/pressure-sensors-and-transmitters/amplified-pressure-sensors/lba/
[15:39] <eroomde> i found some nice 25Pa diff ones with atmospheric common mode on farnell
[15:40] <Laurenceb> yeah seen those
[15:40] <eroomde> they'd do pitot tubes on a descending hab quite nicely
[15:40] <Laurenceb> I'm intrigued by the MEMS thermal flowmetry
[15:40] <adamgreig> any recommendations for higher speed things?
[15:40] <Laurenceb> http://www.first-sensor.com/cms/upload/datasheets/DS_Standard-LBA_E_11691.pdf
[15:40] <adamgreig> would like some pitot tubes on future rocket platforms
[15:40] <richardeoin> adamgreig: I'm just about to do the farnell order for them, will be a while before we fly them
[15:40] <adamgreig> richardeoin: maybe sub for the 5611 on farnell then ;)
[15:40] <Laurenceb> also ISO9001
[15:41] <Laurenceb> so it must be good /s
[15:41] <richardeoin> I wonder how you would attach a differential sensor to a balloon
[15:42] <eroomde> fill tube?
[15:42] <richardeoin> ah having a little tube poking though?
[15:43] <richardeoin> I'd be nervous about the seal around the tube
[15:44] <eroomde> sure, though perhaps some five-mix epoxy might sort it
[15:44] <eroomde> i don't know
[15:44] <eroomde> five-min*
[15:44] <Laurenceb> epoxy to latex...
[15:45] <Laurenceb> thats got going to work
[15:45] <Laurenceb> *not
[15:45] <mattbrejza> foil
[15:45] <Laurenceb> try loctite 401, the solution to all problems
[15:45] <Laurenceb> other than gluing to brass for some reason :-/
[15:46] <richardeoin> ooh, definitely worth experimenting with
[15:48] <UpuWork> http://www.thetelegraphandargus.co.uk/news/13841440.UFO_researchers_descend_on_Yorkshire_for_conference_hosted_by_Keighley_man/
[15:48] <UpuWork> looks like a party ballon to me
[15:48] <eroomde> no don't use 401
[15:48] <eroomde> that's cyanoacrylite
[15:48] <eroomde> it's crap
[15:48] <eroomde> just find the right adhesive (which is never CA)
[15:48] <Laurenceb> its not CA
[15:49] <eroomde> http://www.loctite.co.uk/sea/content_data/93806_NEWCA401EN.pdf
[15:49] <eroomde> first row of first table
[15:49] <eroomde> Technology: Cyanoacrylate
[15:49] <Laurenceb> its not *normal* CA
[15:49] <Laurenceb> anyway gluing to latex is hard
[15:50] <eroomde> no but homebase 'superglue' is usually ethyl
[15:51] <eroomde> and the whole family and brittle and outgassing
[15:51] <Laurenceb> true :P
[15:51] <Laurenceb> I've just taken delivery of some methyl acrylate stuff
[15:52] <Laurenceb> should be interesting to try, but not suitable for rubbers
[15:52] <Laurenceb> I use 401 all the time at work, simply as theres nothing better (silicone rubbers to rigid plastics)
[15:53] <eroomde> silpoxy
[15:53] <eroomde> never CA
[15:54] <Laurenceb> interesting
[15:54] <Laurenceb> havent come across that, thanks
[15:54] <eroomde> np
[15:55] <eroomde> i've seen so much stuff ruined by CA
[15:56] <eroomde> the best is when people use it in a hab payload (not even once) and then come back a few days later and wonder why the camera lens is all cloudy
[15:56] <Laurenceb> heh
[15:56] <Laurenceb> http://i.imgur.com/GUjoWWH.gifv
[15:57] <eroomde> it's just banned in spaceflight too because of the outgassing
[15:57] <eroomde> not that epoxy doesn't outgass, but a lot less and can be baked to get most of it done
[15:57] <eroomde> and it's not a nasty outgass the damaged glass and crazes plastics and so on
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[15:57] <richardeoin> > 16:39:40 eroomde | i found some nice 25Pa diff ones with atmospheric common mode on farnell
[15:58] <richardeoin> ^^ do you have a link please?
[15:59] <eroomde> this iirc http://uk.farnell.com/sensirion/sdp600-025pa/pressure-transducer-lin-25-to/dp/2085056
[15:59] <eroomde> not pico friendly
[15:59] <Laurenceb> heh yeah
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[16:02] <richardeoin> thanks eroomde, still useful to see the specs
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[16:05] <arjunnaha> Can I use speaker wire for a 1/4 antenna?
[16:05] Nick change: nic_ -> shortstheory
[16:06] <adamgreig> so long as you get them in the right direction
[16:06] <adamgreig> arrow goes from coax outwards
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[16:07] <eroomde> i just settled all my segfaults; fuck you GDB!
[16:07] <eroomde> possibly the wrong channel, sorry
[16:07] <adamgreig> lol
[16:07] <adamgreig> language ed :p
[16:08] <eroomde> though i do think the entirety of Without Me could be re-lyriced for writing software
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[16:09] <eroomde> now this looks like a bug for me // so everybody just follow me // cos we need a little breakpointery // cause it fails so quickly, without b.
[16:09] <eroomde> etc
[16:12] <arjunnaha> adamgreig: http://imgur.com/4Zb4ub3
[16:13] Nick change: michal_f -> michal_f|AFK
[16:13] <eroomde> arjunnaha: never do that again.
[16:13] <arjunnaha> lol
[16:13] <arjunnaha> serious though, what do you mean?
[16:13] <adamgreig> speaker cable is fine but it's well known to be directional
[16:13] <adamgreig> usually has an arrow indicating direction
[16:14] <adamgreig> otherwise the direction of the text pritning
[16:14] <adamgreig> search google for more information
[16:14] <mattbrejza> i think you might be spending too much on your speaker cable adamgreig
[16:14] <Laurenceb> is it oxygen free?
[16:14] <adamgreig> mattbrejza: lol
[16:14] <adamgreig> I was so upset when the guy at the shop said this just as I was about to leave
[16:15] <mattbrejza> did you correct him?
[16:15] <mattbrejza> why does it have the arrow in the first palce.. :/
[16:15] <adamgreig> like, third time I'd been to the shop, spent plenty of time in the listening room, ordered in a nice enough set of speakers, got him to crimp some cable up
[16:15] <adamgreig> had returned to pay up and collect and etc
[16:15] <adamgreig> was halfway out the door
[16:15] <adamgreig> "oh! by the way, don't forget to make sure the cable goes the right way around!"
[16:15] <adamgreig> "....sorry?"
[16:16] <adamgreig> I asked for a replacement with non-directional cable and I think he kind of gave up
[16:16] <mattbrejza> lol
[16:16] <adamgreig> mine doesn't have arrows fwiw
[16:17] <mattbrejza> http://www.whathifi.com/comment/529264#comment-529264
[16:17] <arjunnaha> My amazon basics cable only has a white line for -
[16:17] Action: Laurenceb orders lots of silpoxy
[16:17] <eroomde> far down the list of things i ought to spend money on atm but i would like a decent hifi setup at some point
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[16:19] <eroomde> various house diy things come first
[16:19] <eroomde> and the logic pod for my scope
[16:19] <adamgreig> nice hifi is enjoyable
[16:19] <eroomde> and going to antarctica
[16:19] <eroomde> and travel generally
[16:19] <adamgreig> nie to not have to think about it for the next decade or so too
[16:19] <eroomde> which overexpands to fit the financial space available
[16:19] <adamgreig> very jealous of the antarctica trip
[16:19] <eroomde> yes i can't wait actually
[16:20] <arjunnaha> When you are under 18, everything comes free ;-)
[16:20] <eroomde> except wisdom.
[16:21] <arjunnaha> lol
[16:21] <adamgreig> arjunnaha: it may not have been clear but speaker cables aren't really directional unless some numpy has installed a diode in them
[16:21] <arjunnaha> Such as B&W 685s
[16:21] <adamgreig> which will not work wonders for audio quality
[16:21] <LazyLeopard> ...is very carefully not counting up exactly how much that last trip cost...
[16:21] <eroomde> i don't think numpy installs diodes
[16:21] <adamgreig> numpty even
[16:21] <arjunnaha> adamgreig: Got it mine don't have arrows so should be fine
[16:21] <adamgreig> hah
[16:22] <eroomde> but it does have gfortran as a prereq
[16:22] <eroomde> (... actually i think only scipy does but artistic license)
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[17:43] <deepdesigns> hey guys
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[17:46] <deepdesigns> First time HABing
[17:46] <deepdesigns> is this normal pathing or are my calculations off, or is this a bug?
[17:46] <deepdesigns> http://imgur.com/YCDQ3xG
[17:46] <mbales> hi there, looks normal to me
[17:46] <Lunar_Lander> interesting trajectory
[17:47] <Lunar_Lander> but looks OK
[17:47] <deepdesigns> awesome
[17:47] <deepdesigns> a 10km drive would be so great lol
[17:47] <mbales> yeah thats not bad at all
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[17:47] <mbales> what are you planning on flying?
[17:48] <deepdesigns> we entered a pumpkin carving contest, so we made up a pumpkin (foam) to look like the death star
[17:48] <deepdesigns> since the entry method is video
[17:48] <deepdesigns> we thought we would send it to space
[17:48] <mbales> nice
[17:48] <deepdesigns> or, close enough :)
[17:48] <mbales> have a tracking system yet?
[17:48] <deepdesigns> We are using the HAS eagle kit
[17:49] <deepdesigns> 1200g balloon with ~120 cu. ft. of helium... slightly worried we won't break 100k
[17:49] <mbales> very nice
[17:49] <deepdesigns> the pumpkin weighs like 9 grams
[17:50] <deepdesigns> and the descent rate is look like 7.5m/s which is slightly worrying
[17:50] <deepdesigns> is looking like*
[17:50] <Laurenceb> eroomde: do you know a good source of info on nose cones?
[17:50] <mbales> thats not much weight at all under that big a balloon
[17:50] <Laurenceb> I'm looking for the equations for Von Karman
[17:50] <deepdesigns> so, if you guys have any tips or tricks, that would be awesome :)
[17:51] <mbales> you shouldnt have too much trouble hitting 100k
[17:51] <daveake> less weight or larger parachute
[17:51] <daveake> 5m/s is generally what people aim at
[17:51] <mbales> just under fill the balloon a bit
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[17:51] <deepdesigns> I don't care if the pumpkin survives honestly, I just want to be able to recover the gopros and computers
[17:52] <deepdesigns> mbales, does that just increase time to burst?
[17:52] <deepdesigns> so it will take longer, but it will go higher?
[17:52] <mbales> the spot will be fine, Ive had one hit going 20 m/s
[17:53] <deepdesigns> nice
[17:53] <mbales> exactly
[17:53] <mbales> Ive had 300g balloons make it to 108k
[17:54] <mbales> with a ~120 gram payload
[17:56] <deepdesigns> ok, last question.. do we need to add a reflector or other device for the FAA?
[17:57] <mbales> legally no, nnot with that light of a payload
[17:57] <mbales> is it a good idea? yes
[17:57] <adamgreig> or no
[17:57] <adamgreig> the standing advice is to mostly not add a radar reflector
[17:57] <mbales> interesting
[17:57] <mbales> whats the reasoning?
[17:58] <adamgreig> waste of time and space and mass
[17:58] <mbales> fair enough
[17:58] <mbales> learn soemthign new everyday
[17:58] <adamgreig> aircraft don't carry traffic radar anyway so you're just hoping that ground ATC spots it and then tells a pilot
[17:58] <deepdesigns> I could see it adding an unnecessary worry for radar operators
[17:59] <mbales> everytime Ive tried to inform my local ATC they really dont seem to care
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[18:00] <adamgreig> right, balloons are pretty tame and boring
[18:01] <mbales> i once got bounced around between 6 different ATCs in my general region, ended up talking to the local airforce base who wanted to know where they could follow along
[18:01] <adamgreig> sounds about right
[18:02] <deepdesigns> thanks guys you're awesome!
[18:02] <deepdesigns> is there a subreddit for this?
[18:02] <Upu> !wiki
[18:02] <SpacenearUS> 03Upu: Here be the wiki, arr: 12http://ukhas.org.uk
[18:03] <mbales> yes there is a subreddit
[18:03] <mbales> reddit.com/r/hab
[18:03] <mbales> not for this IRC but hab in general
[18:04] <mbales> my username is slapplebags on there
[18:04] <craag> THere's also a mailing list: https://groups.google.com/forum/#!forum/ukhas
[18:04] <craag> Which is probably the second most active (after this irc)
[18:05] <deepdesigns> nice, thank you
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[18:08] <MikeUoN> hi
[18:08] <mbales> ahoy hoy
[18:09] <Lunar_Lander> hi MikeUoN
[18:09] <MikeUoN> how's it going
[18:09] <mbales> slowly, its monday morning, haha
[18:10] <MikeUoN> lol always the case
[18:13] <mbales> running a kickstarter is not as much fun as i thought it would be
[18:13] <MikeUoN> erk
[18:14] <adamgreig> I always imagined it'd be pretty terrifying
[18:14] <deepdesigns> whats your kickstarter?
[18:14] <mbales> (sorry to everyone who has seen this too many times now) https://www.kickstarter.com/projects/1250163085/tracksoar-aprs/
[18:14] <MikeUoN> It's not something I would want to commit myself to, kudos to you for giving it a shot.
[18:15] <mbales> it sounded like a great idea up until a week ago, haha
[18:16] <MikeUoN> lol
[18:16] <deepdesigns> looks awesome
[18:16] <deepdesigns> I'm pretty worried about the spot trace device
[18:16] <MikeUoN> everyone really does seem to use uBlox xD
[18:16] <mbales> they are awesome little modules
[18:16] <mbales> the spots work great, i fly them as back up trackers
[18:17] <mbales> if all else fails the spot will work
[18:17] <MikeUoN> I was pretty much told to go away when I enquired about their G7020 modules xD
[18:17] <deepdesigns> thats our only active tracker
[18:17] <deepdesigns> everything else is stored on the flight computer
[18:17] <mbales> just a heads up it will cut out at 40k -60k feet
[18:17] <mbales> but will come back once its below there
[18:17] <adamgreig> MikeUoN: the G7020s work a treat https://www.flickr.com/photos/randomskk/20118347715/in/album-72157653850703723/
[18:18] <deepdesigns> how often to they send coordinates?
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[18:18] <mbales> wow thats tine
[18:18] <mbales> tiny
[18:18] <MikeUoN> how did you get hardware implementation stuff? Or did you experiment?
[18:18] <mbales> you can get different plans for it, the cheap plan is once every 10 minutes
[18:18] <adamgreig> this is the large version for easier developing mbales, you should see the small one ;)
[18:18] <adamgreig> the spots are alright but a lot less reliable than a good radio tracker
[18:18] <mbales> ^this^
[18:19] <adamgreig> MikeUoN: couldn't possibly say
[18:19] <mbales> I lifted most of it from trackuino
[18:19] <MikeUoN> :| fair one
[18:19] <mbales> the rest was experimenting
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[18:19] <mbales> oh sorry thought that was meant for me
[18:19] <MikeUoN> Ive spent the last few days trying to sort out the footprint for the SE880 module
[18:20] <adamgreig> that's nice
[18:20] <mbales> what do you use for CAD?
[18:20] <MikeUoN> Alas, my eagle skills are... Not quite up to it xD
[18:20] <adamgreig> bit chunkier than the g7020 iirc
[18:20] <adamgreig> kicad mbales
[18:20] <MikeUoN> Yeah
[18:20] <adamgreig> has the xtal integrated though
[18:20] <mbales> nice, Ive been looking at making the jump
[18:20] <adamgreig> but on this I can have a singlw 26MHz TCXO and share it between the micro, the radio, and the GPS
[18:20] <adamgreig> which saves cost/mass/power
[18:20] <MikeUoN> nice
[18:20] <adamgreig> kicad's lovely mbales and I really recommend it over eagle
[18:21] <MikeUoN> :/
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[18:21] <mbales> yeah, eagle works but its a bit painful at times
[18:21] <adamgreig> all cad is a bit painful at some times I guess
[18:21] <mbales> haha
[18:21] <mbales> just pick your poison i guess
[18:21] <mbales> but being free is a big plus
[18:21] <mbales> and i mean really free not eagle free
[18:21] <mbales> a few guys i know use altium, i am so jealous
[18:22] <adamgreig> yes that's what drew me to it
[18:22] <adamgreig> altium is very nie too
[18:22] <mbales> but so expensive
[18:22] <adamgreig> MikeUoN: you with a university group?
[18:23] <MikeUoN> I'm in a uni, yeah.
[18:23] <adamgreig> I guess it starts with N but which one? P
[18:23] <MikeUoN> Nottingham lol :P
[18:23] <adamgreig> cool, is there a group there doing stuff?
[18:23] <MikeUoN> nope
[18:24] <adamgreig> aw, fe
[18:24] <adamgreig> what were you looking at the g7020s for?
[18:24] <MikeUoN> Building my own pico tracker.
[18:24] <MikeUoN> Reduce size/weight etc from the bigger modules
[18:25] <mbales> awesome
[18:25] <adamgreig> yea
[18:25] <mbales> its a fun process
[18:25] <MikeUoN> Yeah, I'm just clearing it with the uni to launch a normal latex balloon in a month or so
[18:27] <mbales> putting any sensors or a camera on board?
[18:28] <MikeUoN> yeah, bunch of the standard type sensors.
[18:28] <mbales> very cool
[18:28] <MikeUoN> Might see if anyone has a gopro they want to put on, but I'm not too fussed about that
[18:28] <MikeUoN> thx :)
[18:29] <mbales> keep it warm of the batteries wont last too long
[18:29] <deepdesigns> we bought an extended battery for our gopro
[18:29] <deepdesigns> http://www.bhphotovideo.com/c/product/1055770-REG/brunton_f_allday_yl_f_allday_extended_battery_back.html
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[18:30] <deepdesigns> its bigger than the actual gopro in a case
[18:30] <mbales> I;ve been toying around with flying one of these: http://www.amphenol-sensors.com/en/products/co2/co2-modules/3215-t6700
[18:30] <mbales> haha wow, thats a massive battery
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[18:31] <deepdesigns> 14.2g
[18:31] <deepdesigns> so, not terribly heavy either
[18:31] <mbales> gotta love lithium
[18:31] <chris_99> ooh that co2 module looks ineresting
[18:31] <chris_99> *interesting
[18:31] <mbales> trouble is theyre $200 USD a piece for single quantity
[18:31] <mbales> Ive taken to flying these: https://usa.ioncamera.com/snapcam-lite/
[18:32] <chris_99> ah, bugger
[18:32] <mbales> cheap and light
[18:32] <deepdesigns> wow that is really cool
[18:32] <mbales> yeah a bit steep, if you could buy 100 they drop to $100 USD a piece
[18:32] <mbales> yeah theyre great little cameras
[18:32] <deepdesigns> if it was 1080 I would order 2
[18:33] <mbales> they do video and time lapse
[18:33] <mbales> TBH video on a balloon tends to induce motion sickness, i much prefer timelapse
[18:33] <adamgreig> time for a motion stabalised platform :P
[18:34] <deepdesigns> tiny stabilizer or heavy camera
[18:35] <deepdesigns> just throw it on a big spring
[18:36] <mbales> or some sticks out the side to increase moment
[18:36] <mbales> um
[18:36] <deepdesigns> they have motorized ones for gopros but they are probably pretty heavy
[18:37] <mbales> and they need another battery
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[18:37] <deepdesigns> this is one they use for drones http://bit.ly/1L84ThP
[18:38] <deepdesigns> uses sensors and tiny air cushions.. interesting
[18:38] <deepdesigns> you could probably replicate that with balsa or similar wood easily
[18:38] <MikeUoN> i wonder if some CS guru could stitch footage together from multiple cameras...
[18:39] <mbales> theres an idea
[18:39] <mbales> or they do sell 360 FOV cameras
[18:39] <deepdesigns> https://theta360.com/en/
[18:40] <chris_99> theres a camera i saw that's a ball, thats got like 30 odd cameras on
[18:40] <deepdesigns> the video quality isn't super great, but it's good enough
[18:41] <deepdesigns> so, dual 180 cameras
[18:41] <deepdesigns> only 25 minutes of capture though.. meh
[18:41] <mbales> yeah not too super, i saw them demoed at the bay area maker faire
[18:43] <deepdesigns> most video editing software has stitching but it never tuns out quite right
[18:43] <deepdesigns> it more depends on how your cameras are set up
[18:44] <deepdesigns> anyone know of a descent rate calculator? I'm afraid my maths are wrong
[18:44] <adamgreig> boy is there a video for you
[18:45] <adamgreig> https://www.youtube.com/watch?v=S7KujrsUB1w&feature=youtu.be&t=3h49m57s
[18:47] <MikeUoN> ^legit awesome
[18:50] <deepdesigns> math porn
[18:51] <deepdesigns> oh boy
[18:52] <mbales> check out the astra balloon planner
[18:53] <mbales> kinda unrelated but i like it the best of all the ones ive used
[18:53] <deepdesigns> so whats the highest speed you can get before worrying about it either damaging itself or something else?
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[18:53] <adamgreig> aim for 5m/s
[18:53] <adamgreig> then if you screw up and hit 8m/s it's not the end of the world
[18:54] <adamgreig> multiply by 2.5 to get a rough guess in mph
[18:54] <adamgreig> (really more like 2.4 but 2.5 is nice in your head)
[18:54] <adamgreig> so e.g. 5m/s is about 12mph
[18:54] <deepdesigns> I'm at 7.3m/s
[18:54] <adamgreig> bit fast
[18:54] <adamgreig> you're not likely to be accidentally slower
[18:54] <adamgreig> you are somewhat likely to be accidentally faster
[18:56] <deepdesigns> I'm assuming having multiple parachutes can be somewhat tenuous or unpredictable
[18:56] <deepdesigns> unless they're symmetrical or designed to be that way
[18:56] <adamgreig> don't do that
[18:56] <adamgreig> lots of fun
[18:56] <adamgreig> probably tangle each other and end poorly
[18:56] <mbales> or lots of twisted vables
[18:57] <mbales> aye
[18:57] <deepdesigns> in the dwarf fortress sense of fun?
[18:57] <adamgreig> right
[18:57] <SpeedEvil> Redundant arrays of Parachute Equipment is a bad idea for many reasons.
[18:57] <adamgreig> hope that wasn't intentional SpeedEvil
[18:58] <SpeedEvil> Sorry - I'm not very awake, and should have censored that.
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[19:00] <deepdesigns> I think I need a bigger parachute
[19:01] <SpacenearUS> New position from 03W3EAX-11 after 032 days silence - 12http://tracker.habhub.org/#!qm=All&q=W3EAX-11
[19:01] <deepdesigns> I overestimated weight but its still very close to 7.5m/s
[19:02] <mbales> maybe lose the wooden platform to drop weight?
[19:02] <deepdesigns> if anything we can lose the second gopro
[19:02] <deepdesigns> they're only roughly ~300g though
[19:02] <deepdesigns> but that can make a huge difference
[19:03] <mbales> definitely
[19:03] <deepdesigns> oh I know.. the flight computer runs off of standard sized batteries
[19:03] <deepdesigns> I could put watch batteries in to save weight
[19:03] <deepdesigns> 3 AA batteries
[19:04] <deepdesigns> and the battery case
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[19:09] <mbales> watch batteries may not perform too well, their instantaneous current draw is super low
[19:13] <deepdesigns> yeah.. I might just see what I can find that would consolidate it that has plenty of volts and enough amps for a few hours
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[19:18] <mbales> you might look at cr123 batteries
[19:18] <Upu> http://data.energizer.com/PDFs/l91.pdf
[19:19] <mbales> thats what i fly
[19:24] <Lunar_Lander> these are the best batteries in the world
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[19:24] <Lunar_Lander> are those the AA or AAA?
[19:25] <Lunar_Lander> don't want to click, I have the PDF multiple times already :D
[19:25] <mbales> AA
[19:25] <Lunar_Lander> thanks
[19:25] <MikeUoN> 14.5g massive! ;)
[19:26] <craag> l91 have an extremely hig energy density though
[19:26] <Lunar_Lander> yea
[19:26] <MikeUoN> yeah v impressive graphs there
[19:26] <Lunar_Lander> I looked at the AAA for my next flight though
[19:26] <craag> best for non-pico flights
[19:26] <Upu> I used them on Picos :)
[19:27] <craag> heh yeah
[19:27] <craag> susf's trackers use 1x AA
[19:27] <SpeedEvil> craag: specific energy, not energy density
[19:27] <craag> makes things v easy
[19:27] <SpeedEvil> Sorry.
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[19:27] <craag> Ah fair enough
[19:28] Action: SpeedEvil has been doing quadcopter numbers recently.
[19:28] <deepdesigns> does it have be lithium?
[19:28] <craag> probably still reasonable per volume though ;)
[19:28] <deepdesigns> I read alkaline will freeze
[19:28] <SpeedEvil> deepdesigns: alkaline isn't bad at all
[19:28] <SpeedEvil> deepdesigns: If your payload doesn't get cold - and with multiple cameras, it may not
[19:28] <mbales> but they are heavier
[19:28] <craag> deepdesigns: these lithium (non-rechargeable chemistry) cope v well with cold
[19:28] <SpeedEvil> yeah
[19:29] <deepdesigns> I might just put my foot down.. the design team doesn't want to cut anything from the death star
[19:29] <SpeedEvil> L91s are awesome
[19:29] <deepdesigns> but the millenium falcon weighs as much as 3 li AA batteries
[19:29] <deepdesigns> so that might have to go
[19:29] <Lunar_Lander> :)
[19:29] <Lunar_Lander> I fell from higher buildings than this!
[19:29] <Lunar_Lander> :D
[19:30] <deepdesigns> they're attaching micromachine x-wings and tie fighters to the pumpkin with springs
[19:31] <deepdesigns> and it sits on a bearing so it will spin, hopefully not too fast
[19:31] <deepdesigns> although it would be hilarious if it started to spin really really quickly
[19:31] <deepdesigns> I don't think it is heavy enough though
[19:31] <deepdesigns> I should have paid more attention college math :(
[19:33] <deepdesigns> everything I know about launching space vehicles I've learned from kerbal
[19:34] <MikeUoN> lol
[19:34] <MikeUoN> that is pretty much was NASA does irl... :P
[19:35] <Lunar_Lander> XD
[19:36] <deepdesigns> they are insane
[19:36] <deepdesigns> I mean, skycrane, bouncing airbags
[19:37] <Lunar_Lander> https://drive.google.com/file/d/0B1lke6hPHKJDcTVGMll3UWtWdE0/view?usp=sharing payload box a bit heavy
[19:37] <deepdesigns> yeah my payload is 5 times that weight almost.. yeesh
[19:37] <deepdesigns> actually more like 4 times
[19:38] <deepdesigns> my pants weren't brown when I bought them
[19:39] <deepdesigns> we're up to like 1k in costs including the storm trooper costumes :(
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[19:42] <Lunar_Lander> oh
[19:42] <mbales> jeez
[19:42] Action: deepdesigns is in over his head, both figuratively and literally
[19:42] <mattbrejza> meh, anything <2kg is fairly light by some standards
[19:43] <deepdesigns> well we had like a week to put this all together, which is why I got the kit
[19:43] <mbales> dont tell the FAA but i was involved with a 4kg launch
[19:43] <deepdesigns> otherwise I would have shopped around for good deals
[19:44] <deepdesigns> some extra cash may or may not have gone to extra star wars toys.. I mean.. who can keep track :)
[19:44] <fsphil> I keep bumping into stormtroopers. it's a bit odd
[19:44] <deepdesigns> the star wars hype train is on full steam
[19:46] <MikeUoN> "beam me up scottie"
[19:47] <mbales> may th eforce live long and prosper
[19:48] <fsphil> if only you knew the power of dilithium crystals
[19:48] <deepdesigns> realizing how many airstrips are around our launch/landing zone
[19:49] <mbales> i generally only take into account ones with air traffic control tower, not 100% on the legality of that so dont listen
[19:50] <deepdesigns> right now its looking like it will land within a few km of a small airstrip.. probably going to move our launch site then
[19:50] <deepdesigns> I didn't even know until I opened it up in google earth
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[20:16] <arjunnaha> Does the launch location matter on the flight doc?
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[20:17] <mbales> asking about launching within the US?
[20:17] <craag> arjunnaha: Not really, just goes on the habhub calendar.
[20:18] <mbales> ah
[20:18] <arjunnaha> So it doesn't affect the prediction on the live map?
[20:18] <craag> no
[20:18] <craag> that only uses the latest balloon position
[20:19] <Upu> it can help us rotate our antennas to the launch site before you upload
[20:19] <craag> there is that ^^
[20:19] <craag> so useful to have it roughly correct at least
[20:19] <Upu> some of us are fancy pants and have big pointy antennas
[20:19] <craag> :D
[20:20] <Upu> shame the coax between it and the radio is broken
[20:20] <Upu> but hey ho
[20:20] <fsphil> just need a bigger preamp
[20:20] <Lunar_Lander> antenna is a good point
[20:21] <Lunar_Lander> german cansat winner team made this antenna: http://www.cansat.de/CanSat%202015/DLR/DLR30.jpg
[20:21] <daveake> I think morseman put a pin in it, Upu
[20:22] <Upu> haha
[20:22] <fsphil> lol
[20:22] <Upu> I have a man with a ladder coming round on Sat
[20:22] <daveake> Good plan
[20:22] <daveake> There's a reason I don't have a tall ladder
[20:23] <daveake> To do with gravity and hard surfaces
[20:23] <Lunar_Lander> yeah
[20:23] <Lunar_Lander> too much risk involved
[20:23] <Lunar_Lander> as found out by Isaac Newton
[20:24] <Lunar_Lander> DL1SGP and I already discussed this antenna
[20:24] <Lunar_Lander> it looks not the right dimension for 70cm operation
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[20:30] <Lunar_Lander> but still interesting
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[20:36] <craag> Lunar_Lander: might be wifi
[20:36] <Lunar_Lander> hm, but the cansats used 70cm TX
[20:37] <Lunar_Lander> and they said in their blog they made the antenna for that
[20:37] <craag> heh I think they got it wrong then..
[20:37] <Lunar_Lander> yea
[20:38] <craag> Otherwise it's a nice looking antenna
[20:38] <Lunar_Lander> yea
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[20:38] <Lunar_Lander> https://lh3.googleusercontent.com/-RDMveJb7ccM/VfMvwkzWGPI/AAAAAAAAATk/gdPr4Lg5XUM/s640/blogger-image--595062959.jpg that photo they called "We measured the impedance of the antenna and it looks good to us"
[20:38] <Lunar_Lander> you can't even really see what the instrument is
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[20:44] <fsphil> how does one move a group of items to a specific location in eagle?
[20:45] <mbales> that is a good question
[20:45] <mbales> how would you define the location of the group?
[20:45] <mbales> by the xenter of one part or the center of the group?
[20:45] <fsphil> top left corner
[20:45] <mbales> ok
[20:46] <mbales> there is a way!
[20:47] <mbales> http://www.element14.com/community/thread/15268/l/can-i-copymove-a-group-components-a-set-distance-via-command-line
[20:48] <fsphil> through the properties I can set the position of an individual part (relative to its centre)
[20:48] <mbales> is that helpful?
[20:49] <fsphil> yeah, though that's a relative move. I can calculate it based on the current position I guess
[20:49] <mbales> ah i see
[20:50] <fsphil> I take it (>0 0) sets the reference point in the group?
[20:50] <fsphil> probably not the correct term
[20:50] <Upu> you don't fsphil
[20:50] <Upu> boy does it make panelising fun
[20:50] <fsphil> one does not simply move items in eagle?
[20:51] <mbales> haha
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[20:51] <mbales> a real man moves eagle parts by editing the xml files
[20:51] <fsphil> at this rate that might be easier
[20:51] <ulfr> or 'move'
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[20:53] <Upu> it can be a pita sometimes
[20:53] <Upu> just keep the grid the same (multiples) of size
[20:53] <Upu> spam :
[20:53] <Upu> 0.01984375
[20:53] <Upu> 0.0396875
[20:53] <Upu> 0.079375
[20:53] <Upu> 0.15875
[20:53] <Upu> 0.3175
[20:53] <Upu> 0.635
[20:54] <Upu> grid sizes
[20:54] <fsphil> not the google search result I expected, https://www.youtube.com/watch?v=n4ESDzqSeoM
[20:55] <mbales> owl, kill!
[20:57] <deepdesigns> how do you guys decide on a launch location?
[20:59] <Upu> depends weather, permission to launch, land owners permission etc
[20:59] <Upu> somewhere that doesn't have too many trees or sticky up things around it
[20:59] <Upu> away from airports
[21:00] <Upu> and Texas, I hear they shoot balloons down there
[21:00] <deepdesigns> o.o
[21:00] <deepdesigns> I hadn't thought of that
[21:00] <mbales> look for public land, ie blm land
[21:00] <Upu> last one was a joke
[21:01] <mbales> avoid road sides as cops tend to not like such things
[21:01] <deepdesigns> we shoot everything here in texas
[21:01] <Upu> :o)
[21:01] <mbales> or state / city / national parks
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[21:18] <deepdesigns> I think I found a good spot.. might have to knock on a door
[21:18] <deepdesigns> I don't want to die dressed as a storm trooper
[21:18] <deepdesigns> http://predict.habhub.org/#!/uuid=b095f064631d5dcc138cfd4a22ed733b876ac7fd
[21:18] <fsphil> for the empire
[21:19] <mbales> i find it helps if you bring children when you ask, and say its a school project regardless of whether it is or not
[21:19] <mbales> how wet is that creek?
[21:20] <deepdesigns> trying to find out.. not very
[21:20] <mbales> and that looks a bit close to power lines for my liking
[21:20] <deepdesigns> 3.5 feet
[21:20] <deepdesigns> max
[21:21] <deepdesigns> how are power lines indicated on the map?
[21:21] <deepdesigns> just looking at satellite?
[21:21] <mbales> theyre not, you can switch to satellite view and see them along the 95 there
[21:21] <mbales> balloons have a way of finding water ive found
[21:23] <deepdesigns> http://predict.habhub.org/#!/uuid=5a8f22da4694887536211617fe95e2a8787d16af
[21:25] <mbales> much better
[21:25] <deepdesigns> nice :D
[21:26] <mbales> just keep running the prediciton and make sure it doesnt change too much
[21:26] <deepdesigns> hopefully the weather doesn't change that much between now and then
[21:26] <mbales> when are you launching?
[21:26] <deepdesigns> thursday morning 0600 about
[21:27] <mbales> nice
[21:27] <mbales> going for a pre-dawn launch?
[21:27] <deepdesigns> yeah we want to get awesome dawn shots of the horizon
[21:28] <deepdesigns> kinda dark at launch, gets brighter and brighter
[21:29] <mbales> thats going to looks great
[21:30] <deepdesigns> yeah just wondering how early, because obviously the higher it gets the brighter it gets
[21:31] <deepdesigns> sunrise is at 7:30.. burst is at 7:55
[21:31] <deepdesigns> that should be pretty perfect
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[21:37] <eroomde> Laurenceb: nothing in particular
[21:37] <eroomde> approximate methods for missile aerodynamics is a reference we use at wpork sometimes
[21:37] <eroomde> busy here this eve
[21:39] <eroomde> farnell is advertising to me some stuff i was looking at earlier in the evening in the RS paper catalogue
[21:39] <eroomde> spookyu
[21:40] <deepdesigns> if you use chrome, this is helpful
[21:40] <deepdesigns> https://support.google.com/adsense/answer/142293?hl=en
[21:40] <eroomde> oh i have ublock and umatrix and everything on
[21:40] <deepdesigns> for you website owners out there
[21:41] <deepdesigns> we found at our agency people don't like them :P
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[21:42] <deepdesigns> you have to sign into adsense and turn it off on what user account you're using
[21:42] <deepdesigns> that will take care of a few of them
[21:42] <deepdesigns> https://www.google.com/settings/u/0/ads
[21:43] <eroomde> i never see ads anyway
[21:43] <eroomde> except farnell
[21:43] <eroomde> which are not so much adds as the actual online catalogue
[21:46] <eroomde> deepdesigns: i don't think that parachute video is too maths porn
[21:46] <eroomde> i tried to make it as maths-free as is practically possible to get the important concepts across
[21:46] <deepdesigns> it is a great video
[21:46] <deepdesigns> thank you
[21:47] <deepdesigns> I didn't feel overwhelmed at all
[21:47] <deepdesigns> and came out with a better understanding of parachutes
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[21:47] <mbales> link?
[21:47] <deepdesigns> https://www.youtube.com/watch?v=S7KujrsUB1w&feature=youtu.be&t=3h49m57s
[21:47] <eroomde> good. short but sweet
[21:48] <mbales> awesome
[21:49] <deepdesigns> except the guy who didn't turn his ringer off :(
[21:50] <deepdesigns> I hope that the parachute that came with the kit is good enough
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[21:51] <eroomde> which kit?
[21:52] <deepdesigns> http://www.highaltitudescience.com/products/eagle-pro-near-space-kit
[21:52] <deepdesigns> 1200g version
[21:52] <eroomde> oh
[21:52] <eroomde> it'll glide like a banshee
[21:52] <deepdesigns> well, my payload is quite heavy
[21:52] <eroomde> so don't put too much faith in the flight predictions
[21:53] <deepdesigns> so I hope that helps
[21:53] <adamgreig> Our parachutes are designed specifically for near-space flights and manufactured right here in the US by a company that specializes in manufacturing parachutes for defense contracts.
[21:53] <adamgreig> lol
[21:53] <adamgreig> HAS stuff is so upsettingly expensive
[21:53] <adamgreig> I guess so is SiS
[21:53] <deepdesigns> yeah, I only had a few days to get everything together after knowing 0 about HAB
[21:54] <deepdesigns> everything had to ship here on time, etc
[21:54] <Upu> wtf $700 and it doesn't even track ?!
[21:54] <mbales> bananas!
[21:54] <Upu> holy crap
[21:54] <deepdesigns> it doesn't live track, it has an onboard computer
[21:55] <deepdesigns> and a spot trace
[21:55] <Lunar_Lander> ohhhhhhhh
[21:55] <mbales> spot will give you a live update& every 10 minutes
[21:55] <Upu> to about 12km
[21:55] <eroomde> and no updates at all if it lands upside down
[21:55] <eroomde> spot is a seriously poor relation to a proper radio tracker
[21:55] <eroomde> the dodgy uncle we don't talk about who did a spell in prison
[21:55] <mbales> actually Ive tested the spot3 and it reports from any orientation, even in the dirt
[21:56] <Upu> still doesn't work at altitude properly
[21:56] <Upu> just get an APRS tracker
[21:56] <daveake> American Basswood
[21:56] <daveake> I'm impressed
[21:56] <eroomde> if you're a USA-ian
[21:57] <deepdesigns> from the little research I was able to do, the spot will give us a few chances to get close enough reading if it lands weirdly or in water
[21:57] <Upu> do you have a HAM radio license ?
[21:57] <deepdesigns> we have 5 people coming out to help look in case something goes wrong
[21:57] <deepdesigns> no :(
[21:57] <Upu> well its your money
[21:58] <deepdesigns> yeah it was more of a time thing.. we're donating it all to a school when we're done anyway
[21:58] <eroomde> well fingers crossed
[21:58] <daveake> " these high quality weather balloons ensure you reach record breaking altitudes."
[21:58] Action: daveake checks records
[21:58] <daveake> nope
[21:58] <deepdesigns> not scared at all /s
[21:59] <Upu> seriously though look at getting a technicians license
[21:59] <Upu> then you can use an APRS tracker
[22:02] <deepdesigns> the next exam isn't until the 17th
[22:02] <mbales> tell you what deepdesigns, if you can find a HAM to help you ill ship you one of my demo boards tomorrow
[22:02] <deepdesigns> which is a day after the contest deadline
[22:03] <eroomde> this is a good offer ^
[22:03] <deepdesigns> oh wow okay
[22:03] <deepdesigns> how does locating it work?
[22:04] <SpeedEvil> it sends gPS numbers
[22:04] <SpeedEvil> you follow it on a map
[22:04] <mbales> you can go to aprs.fi
[22:04] <eroomde> you'll be able to follow it on habhub.org/mt if you tell us the callsign
[22:04] <mbales> or that^
[22:04] <Lunar_Lander> http://www.highaltitudescience.com/products/temperature-pressure-sensor ???
[22:04] <mbales> must be made of magic
[22:04] <mbales> if you need to find a HAM just get a hold of your local HAM club, theres bound to be one near by
[22:05] <deepdesigns> yeah I just found one, calling
[22:05] <deepdesigns> where are you located? we would need next day shipping
[22:05] <mbales> if you give me his call sign Ill pre-program it, so all you have to do is add batteries. Im in santa barbara CA
[22:06] <eroomde> yes that is odd Lunar_Lander. Claims to work at high alts but pressure sensor bottoms out at only 31km
[22:06] <Lunar_Lander> yea
[22:06] <eroomde> the most expensive sandwich i've ever had was ion santa barbera CA
[22:07] <mbales> everythign is expensive here
[22:07] <Lunar_Lander> imo if I'd sell tech like that, I'd say what components are used
[22:07] <eroomde> i foolishly grabbed lunch in some art gallery
[22:07] <mbales> but then you couldnt charge $50 for a bmp180
[22:07] <deepdesigns> mbales do you use hangouts?
[22:07] <mbales> i do indeed
[22:07] <deepdesigns> luckily enough, a coworkers knows a guy that operates his own amature radio station
[22:07] <deepdesigns> crazy world
[22:07] <Lunar_Lander> eroomde, five years ago I attended HAM RADIO at lake constance
[22:08] <deepdesigns> can you send me a hangout invite? cody@sitegoals.com
[22:08] <Lunar_Lander> and like a cola from the vending machine was 3¬ and sausage with fries was more than 5¬ on the exhibition center
[22:08] <eroomde> i'd have just called in on HF Lunar_Lander
[22:08] <Lunar_Lander> :)
[22:11] <mbales> so where was this expensive sandwhich from?
[22:11] <eroomde> some gallery
[22:11] <eroomde> i forget the name
[22:11] <eroomde> but the sort of gallery where the owner comes and chats to the guests in the hope they'll buy another paiting, was the impression i got
[22:12] <Lunar_Lander> oh
[22:12] <mbales> hmmm
[22:12] <adamgreig> i saw this in one of those sorts of galleries
[22:12] <adamgreig> https://www.dropbox.com/sc/f9drz0m2gaykvfj/AABuIokEEu_Jk5bYi9_T1L6ba
[22:12] <eroomde> it had a nice courtyard in the middle with a fountain
[22:12] <eroomde> where i ate
[22:13] <eroomde> was about $25 for my smoked salmon sandwich
[22:13] <adamgreig> yea but did it have a solid silver shArK47
[22:14] <eroomde> lots of the clientelle had the jumper-folded-around-neck thing going on http://vignette2.wikia.nocookie.net/americandad/images/0/04/Sc626_0334.jpg/revision/latest?cb=20120111010603
[22:14] <mbales> ah
[22:14] <mbales> i know the place!
[22:15] <eroomde> that i sort of associate with american country clubs
[22:15] <mbales> i associate it with that as well
[22:15] <eroomde> cool
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[22:15] <eroomde> but it was a nice stop
[22:15] <eroomde> i was doing the route 1 from LA to SF
[22:15] <Lunar_Lander> yeah
[22:15] <Lunar_Lander> that I recall
[22:15] <Lunar_Lander> visiting JPL and so on :)
[22:15] <eroomde> that too
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[22:17] <mbales> nice
[22:17] <mbales> its a nice drive
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[22:17] <eroomde> yeah, lovely
[22:18] <eroomde> the bit along big sur was my favourite
[22:18] <mbales> definitely, though now ts all torn up while they replace a bridge or two
[22:18] <eroomde> there was some of that when i did it
[22:19] <eroomde> also no radio reception
[22:19] <eroomde> which was a shame because the radio was really providing
[22:19] <eroomde> 'santa cruz you're not that far' etc
[22:22] <mbales> yeah theres not much out there
[22:22] <eroomde> bliss really
[22:22] <eroomde> hoping to do a road trip next yr
[22:23] <mbales> well if you find yourself in SB again you should swing by my shop, its about a half mile off the 101
[22:23] <eroomde> willdo
[22:24] <eroomde> you've a hackspace there too?
[22:24] <mbales> yes sir, Im the one that runs it, thats the shop Im referring to
[22:24] <eroomde> oh grand
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[22:28] Nick change: fl_0|afk -> fl_0
[22:28] <eroomde> my colleague has just emailed me this after i asked him how his attempt to port some of his python code to C was going https://media4.giphy.com/media/zIZTZDO2ildU4/giphy.gif
[22:30] <deepdesigns> http://imgur.com/JiDsvXW
[22:30] <deepdesigns> almost ready!
[22:30] <deepdesigns> tie fighters may not be to scale*
[22:30] Nick change: fl_0 -> fl_0|afk
[22:31] <mbales> thats pretty good
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[22:31] <deepdesigns> getting its last coat of paint
[22:34] <SpeedEvil> Does the death star explode?
[22:35] <day> and on the left you see a tie-destroyer
[22:36] <day> it even dwarfs the mighty stardestroyer
[22:36] <deepdesigns> the death star will certainly explode after hitting the ground from this wimpy parachute
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[22:37] <deepdesigns> but at least we'll know where it will land now :D
[22:42] <mbales> assuming fedex complies
[22:46] <deepdesigns> thanks everyone.. driving home!
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[22:48] <Lunar_Lander> good night :)
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[22:52] <fsphil> more aurora tonight
[22:52] <fsphil> the sun has been busy
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[00:00] --- Tue Oct 13 2015