highaltitude.log.20160224

[00:00] <fsphil> it's handy having what is basically a small planet parked right next to us
[00:01] <SpacenearUS> New position from 03KJ4TDM-1 after 033 days silence - 12http://tracker.habhub.org/#!qm=All&q=KJ4TDM-1
[00:02] <Lunar_Lander> good night :)
[00:05] Nick change: mattbrej1a -> mattbrejza
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[00:12] <SpacenearUS> New position from 03N4XWC-1 after 033 days silence - 12http://tracker.habhub.org/#!qm=All&q=N4XWC-1
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[05:28] <Evidlo> Does the FAA require 2 independent cutdowns, AND 2 independent balloon cutdowns?
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[08:08] <MikeUoN> Good morning :)
[08:08] <MikeUoN> Could anyone tell me which layer I'm missing from my Gerber output that results in a mega sized board? http://picpaste.com/pics/badpcb-YjX3YVfY.1456301263.png Thanks
[08:09] <zyp> the outline layer?
[08:10] <MikeUoN> I have an outline area in the .brd file
[08:11] <zyp> yes, but did you generate a gerber file containing the board outline?
[08:12] <MikeUoN> I tried first of all using the gerb274x.cam default job? Surely that would output outline?
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[08:12] <zyp> a full set of gerber files for a two layer board should consist of nine gerber files; paste/silk/mask/trace for top and bottom, and the board outline
[08:13] <zyp> and also the drill file
[08:13] <MikeUoN> hmm, I'll try it again
[08:13] <zyp> drill file is usually a separate export though, since it's a different format
[08:15] <zyp> it's been a long time since I used eagle, so I don't remember exactly, but I believe I made a custom cam job to get everything like I wanted, rather than using the default one
[08:17] <MikeUoN> I tried again, alas no luck :(
[08:19] <zyp> confirm that you have nine gerbers
[08:22] <MikeUoN> 1 sec
[08:22] <MikeUoN> No only six
[08:24] <MikeUoN> These file http://picpaste.com/pics/gerberout1-yAIYSlDO.1456302248.png
[08:26] <MikeUoN> oh, eight after doing the excellon drill procedure
[08:27] <zyp> hmm, those file endings make no sense to me :)
[08:28] <MikeUoN> http://picpaste.com/pics/gerberout2-H9DE3hLI.1456302481.png
[08:28] <MikeUoN> arrgh :)
[08:28] <MikeUoN> thanks for your help though zyp :)
[08:28] <zyp> hmm, I think the old cam jobs have the notion of "component side" and "solder side"
[08:29] <zyp> which is pretty old fashioned :p
[08:29] <MikeUoN> relic of through hole stuff?
[08:30] <zyp> so cmp is trace top, sol is trace bottom, stc is mask top, sts is mask bottom,
[08:30] <zyp> plc is probably something else on top, and what gpi is I have no idea :)
[08:31] <MikeUoN> lol
[08:32] <MikeUoN> gpi = Gerber Plot Information
[08:32] <zyp> ah, so just a useless output report, not even a gerber file?
[08:33] <zyp> I guess it's time for you to learn how to set up your own cam job ;)
[08:33] <MikeUoN> eek
[08:33] <MikeUoN> *pressure intensifies*
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[09:16] <AndyEsser> https://www.youtube.com/watch?v=rVlhMGQgDkY&feature=youtu.be
[09:16] <AndyEsser> Boston Dynamics seem to be coming along well :)
[09:17] <cm13g09> AndyEsser: you know those QR-code-esque markers in that video?
[09:18] <cm13g09> They look decidedly like libkoki markers developed for Student Robotics at the University of Southampton
[09:19] <cm13g09> of course, it could be artoolkit
[09:20] <AndyEsser> Yea, I imagined they were all placement codes/markers for the robots
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[10:14] <edmoore> i wonder how many times that video will be posted today
[10:14] <edmoore> 3 times so far i think
[10:15] <edmoore> maybe i should change the topic
[10:15] <edmoore> 'Re: Boston Dynamics: https://40.media.tumblr.com/tumblr_lhns9z9H9x1qe7hhvo1_500.jpg '
[10:18] <LazyLeopard> Ho hum ;)
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[10:23] <fsphil> in an unrelated not, robot wars stars filming next friday
[10:23] <fsphil> starts*
[10:24] <fsphil> note*
[10:24] Action: fsphil gives up*
[10:24] <edmoore> not even 10.30
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[10:24] <edmoore> not bad going
[10:27] <SpacenearUS> New vehicle on the map: 03DK0TUI-11 - 12http://tracker.habhub.org/#!qm=All&q=DK0TUI-11
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[10:34] <SpacenearUS> New vehicle on the map: 03F5APQ_chase - 12http://tracker.habhub.org/#!qm=All&q=F5APQ_chase
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[10:56] <Ben-AstroSoc> 4/16 through my video processing
[11:01] <edmoore> on the matter at hand in the mailing list, this is worth reading every few years http://docs.oracle.com/cd/E19957-01/806-3568/ncg_goldberg.html
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[11:09] <mfa298> is the world ending, recommending stuff from oracle, whatever next :p
[11:09] <mfa298> although that does look to be from the Sun days
[11:10] <fsphil> I'm sure there are lots of good people still at Oracle
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[11:12] <R34lB0rg> ‘There is an asteroid with our name on it and it will hit us’ -- Brian Cox
[11:12] <fsphil> random
[11:13] <R34lB0rg> in response to <mfa298> is the world ending
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[12:38] <Ian_> I see that Oracle has decided that Java is reaching the end of it's road and will be unsupported and phased out after the next release.
[12:38] <Ben-AstroSoc> tfw i spent the last 18 months learning java
[12:40] <russss> that's the browser plugin, not java itself :)
[12:40] <lz1dev> ^
[12:41] <Ben-AstroSoc> ah
[12:41] <Ian_> ^^ agreed. Thanks lz1dev . . . whew, reprieve Ben
[12:41] <Ian_> I am just an Oracle cynic I guess
[12:41] <Ben-AstroSoc> considering 2/3 of my degree is in electronics i doubt i'l use much java anyway >_>
[12:42] <mattbrejza> most android stuff is java so...
[12:42] <Ben-AstroSoc> i keep meaning to pick up swift
[12:42] <lz1dev> they are only killing the plugin, becasue the interface in browsers is going always in all in all browsers
[12:43] <Ian_> I had a pal go to college to do a photography course. Wet, wet, get the gear. Half way through the course there was a sea change and it was going to be all digital . . .
[12:44] <gonzo_> there was a change over period, where wet film and digital printing, was the vogue
[12:44] <gonzo_> though that was possibly because colour printing was expensive, compared to B&W
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[13:23] <edmoore> Ben-AstroSoc: learn python
[13:24] <Ben-AstroSoc> I did a bit of Python when I built a 3d camera with some RPis
[13:24] <edmoore> it's good
[13:24] <edmoore> it's good for glue and it's good for science
[13:24] <edmoore> which covers the bulk of what i do as an engineer
[13:24] <edmoore> matlab is alright for science (but not great) and useless as glue
[13:25] <edmoore> bash is good glue and literally worse than death for science (excepting awk)
[13:25] <Ben-AstroSoc> Do you use it that much? I think the stuff on my placement is mostly c and labview
[13:25] <edmoore> yes
[13:25] <edmoore> all the time
[13:25] <edmoore> right now
[13:25] <edmoore> i use c a lot too
[13:25] <edmoore> python when i can, c when i have to
[13:25] <edmoore> which is usually embedded
[13:25] <edmoore> labview isn't a programming language it's a disease
[13:25] <edmoore> charitably, a state of mind
[13:25] <edmoore> a bad state of mind
[13:25] <Ben-AstroSoc> :')
[13:26] <Ben-AstroSoc> To be honest I don't know exactly what I'm gonna end up doing
[13:26] <Ben-AstroSoc> I just know I'm continuing development of a noise reduction system for huge cameras/sensors
[13:26] <Ben-AstroSoc> So presumably I might have to use Python
[13:27] <edmoore> python has you covered if you go trading in the city or do astronomy research or want to simulate the effect of unmatched caps on the common-mode rejection ratio of your instrumentation amplifier or web design or whatever
[13:27] <Ben-AstroSoc> I feel like I should understand that middle one but >.>
[13:29] <edmoore> you will do when you try and interface to sensors in hand-to-hand combat situations
[13:29] <edmoore> in summary, instrumentation amps nowadays have amazingly good common-mode rejection ratios
[13:30] <edmoore> like 130dB to 10kHz sort of thing
[13:30] <edmoore> but it nosedives above that
[13:30] <edmoore> so you want to filter off everything above a few khz with a common mode filter
[13:30] <fsphil> thankfully nice and simple to make python modules in C
[13:30] <edmoore> but any imperfections in matching between each half of that filter will turn a common mode into a differential mode
[13:30] <edmoore> which of course gets amplified
[13:30] <edmoore> and so shoots your CMRR
[13:32] <edmoore> the is the sort of day-to-day bollocks of testing rocket engines. Making the rig actually work well in very electrically noisy, vibrationey, wet, corrosive, hot environments.
[13:32] <Ben-AstroSoc> right
[13:32] <edmoore> stroking your beard over thermodynamics at a whiteboard makes up about 1% of it
[13:32] <Ben-AstroSoc> the 2 weeks of instrumentation amps we did apparently didn't go into much detail
[13:33] Action: Ben-AstroSoc adds to reading list
[13:34] <Ben-AstroSoc> on the plus side my first run of jupiter processing is about to finish
[13:34] <gonzo_> I had a fun job with some vontage measuring units we were designing. The basic job was a simple V on a series chain of batts. The difficult was, they were being hot swapped in a charging system wiuth 600V at 100A
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[13:34] <Laurenceb> http://i.imgur.com/dcx2Xzm.gifv
[13:34] <gonzo_> and the comms was being broken with and running with all the HV leads
[13:35] <gonzo_> the previous system they had, the data loggers were regularly exploding
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[13:42] <AndyEsser> edmoore: you have ruined my image of rocket engineers :(
[13:43] <SpeedEvil> Rocket engineering is just plumbing with hotter shit.
[13:44] <AndyEsser> ha
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[13:51] <SpeedEvil> The notional CH4 + O2 -> H2O+CO2 is comedically simplified when you start looking at all of the intermediate reaction products - and are trying to keep combustion stable.
[13:51] <SpeedEvil> Almost as many chemicals as in a sewer
[13:52] <edmoore> although you can mostly abstract over all the intermediate species
[13:52] <SpeedEvil> The fun part is 'mostly' :)
[13:52] <edmoore> all the standard codes account for them at the various equilibrium conditions throughout the engine and just give you in and out conditions
[13:52] <edmoore> which is all you need
[13:53] <SpeedEvil> Doesn't combustion instability make things more complex?
[13:53] <edmoore> we use Gordon and McBride's Chemical Equilibrium Analysis code like almost everyone else
[13:53] <edmoore> some old fortran beast
[13:53] <edmoore> with a java gui that is as pleasant and useful and rabies
[13:54] <SpeedEvil> I may have been biased by that nice spacex presentation on their CFD
[13:54] <edmoore> SpeedEvil: sure. But you design to not go anywhere near there
[13:54] <edmoore> you don't really need to specifically know how fucked it is if it's unstable, merely that it's fucked.
[13:54] <Ben-AstroSoc> http://i.imgur.com/bIngoEt.png
[13:54] <Laurenceb> I dont see why their code is so innovative
[13:54] <Ben-AstroSoc> not happy with it yet
[13:54] <Laurenceb> adaptive mesh is a fairly standard method
[13:54] <edmoore> they fit it nicely onto a GPU
[13:55] <edmoore> GPUs*
[13:55] <edmoore> that was the nice thing
[13:55] <Laurenceb> yeah that part was impressive
[13:55] <AndyEsser> GPU number crunching is cool
[13:55] <AndyEsser> and fun to do :)
[13:55] <SpeedEvil> GPU and error managment and memory reduction wasn't it?
[13:55] <edmoore> Ben-AstroSoc: my attempt https://www.flickr.com/photos/eroomde/8371635224/in/dateposted-public/
[13:56] <edmoore> SpeedEvil: i think the memory reduction follows from the GPU
[13:56] <Ben-AstroSoc> nice
[13:56] <SpeedEvil> yeah
[13:56] <edmoore> but i don't think they especially did memory reduction
[13:56] <edmoore> beyond the adaptive mesh
[13:56] <Ben-AstroSoc> i took a bunch at reall yhigh ISO to get the moons, going to try and do a composition
[13:56] <edmoore> which is basically the only way to do it
[13:56] <SpeedEvil> indeed
[13:57] <SpeedEvil> Are the rings orthogonal, or are they processed out?
[13:57] <edmoore> que?
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[14:00] <SpeedEvil> Oh - I hadn't realised how faint the rings were
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[14:00] <Ben-AstroSoc> yeah there's a hell of a lot of post processing to get that
[14:00] <Ben-AstroSoc> i stacked 8000 frames but i'm not sure how accurate it is as my video conversion was kinda weird
[14:00] <Ben-AstroSoc> tyring a different variation at the moment
[14:00] <edmoore> i don't think i've ever seen a picture of jupiter where i could see the rings
[14:01] <edmoore> mine is one frame
[14:01] <edmoore> like some sort of heathen
[14:01] <Ben-AstroSoc> oh yeah jupiter's actual rings are almos timpossible to see from here
[14:01] <SpeedEvil> hah
[14:01] <SpeedEvil> Looking on wikipedia it doesn't actually mention ground-based observations from other than the Keck
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[14:01] <Ben-AstroSoc> i took about 16 clips but when i process them into .avi it spits out 12 massive avi files that appear to be identical
[14:02] <Ben-AstroSoc> and comes up with 6x the frames that i put in
[14:02] <Laurenceb> Jupiter has rings?
[14:02] <SpeedEvil> Laurenceb: 'no'
[14:02] <Ben-AstroSoc> yeah
[14:03] <Laurenceb> heh
[14:03] <SpeedEvil> Laurenceb: Not observable from the ground.
[14:03] <Laurenceb> yeah
[14:03] <Ben-AstroSoc> https://upload.wikimedia.org/wikipedia/commons/thumb/e/e4/JupiterRings.jpg/400px-JupiterRings.jpg galileo
[14:03] <Ben-AstroSoc> but you can't see em from ehre
[14:03] Action: SpeedEvil wants Keck in his backyard.
[14:03] <SpeedEvil> Actually - I want a backyard big enough to put Keck in
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[14:04] <edmoore> so you can look really closely at clouds?
[14:04] <SpeedEvil> :)
[14:04] <Ben-AstroSoc> gonna process the overexposed one and see if the moons come out
[14:04] <SpeedEvil> It wasn't cloudy last night.
[14:04] <SpeedEvil> I saw the full moon
[14:05] <Ben-AstroSoc> yeah i got a mosaic of it
[14:05] <Ben-AstroSoc> didn't come out as sharp as it could have
[14:05] <Ben-AstroSoc> might run it through gimp
[14:05] <edmoore> i'd like to do some more astrophotography
[14:05] <edmoore> i'm about to get a camera with an interchangeable lens
[14:06] <edmoore> so that should help
[14:06] <Ben-AstroSoc> yeah
[14:06] <edmoore> though i'd like to do some widefield stuff anyway
[14:06] <Ben-AstroSoc> we have an adaptor for a dslr for our scope
[14:06] <edmoore> we do get some decently dark skies here in westcott
[14:06] <R34lB0rg> did someone in here do astrophotography from a hab?
[14:06] <Ben-AstroSoc> i'm too close to birmingham to get particularly impressive deep field
[14:06] <edmoore> no but it's been talked about
[14:07] <edmoore> would be awesome
[14:07] <SpeedEvil> I am annoyed that my camera won't go to more than 100ISO*30s. (or 400*8, ...) - the sensor can clearly do more
[14:07] <edmoore> the hard thing is just getting any kind of pointing stability for longish exposures
[14:07] <Ben-AstroSoc> there's an issue with our scope tracking so deep field is hard
[14:07] Action: R34lB0rg is thinking about the nasa sofia observatory
[14:07] <SpeedEvil> But it was 80 quid.
[14:07] <edmoore> there has been very good astronomy done from balloons
[14:07] <edmoore> BLAST and SPIDER
[14:08] <edmoore> there is a good documentary about BLAST - the building and flying of it
[14:08] <SpeedEvil> https://www.youtube.com/watch?feature=player_detailpage&v=ollpNYOrbcc#t=159 is interesting
[14:08] <edmoore> right up the street of anyone in this channel i'd have thought
[14:08] <SpeedEvil> This is a diffraction grating primary optic telescope
[14:08] <SpeedEvil> - not a telescope with a diffraction grating over it
[14:08] <Ben-AstroSoc> edmoore: got a link?
[14:09] <SpeedEvil> Nice thing is it gives a really good spectrum, and you can have a flat primary lying on the ground
[14:09] <edmoore> trailer: https://www.youtube.com/watch?v=ebJglJaMBnA
[14:12] <edmoore> we have just bought a dishwasher for work!
[14:12] <edmoore> this changes everything
[14:13] <SpeedEvil> edmoore: The real key to space.
[14:14] <R34lB0rg> that's what I call disruptive technology
[14:14] <AndyEsser> I really need to fix my dishwasher at home...
[14:17] <SpacenearUS> New position from 03VE2WMG-10 after 032 days silence - 12http://tracker.habhub.org/#!qm=All&q=VE2WMG-10
[14:19] <Ben-AstroSoc> not sure i'm getting any more detail out of this set of clips
[14:19] <Ben-AstroSoc> gotta wait an hour for the next lot
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[14:22] <AndyEsser> Ben-AstroSoc: need to get closer
[14:23] <Ben-AstroSoc> anyone got a few hundred million they don't immediately need
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[14:25] <AndyEsser> Ben-AstroSoc: you mentioned using Python with some RPi's for 3d vision?
[14:25] <Ben-AstroSoc> yeah
[14:25] <AndyEsser> http://www.nasa.gov/feature/help-nasa-create-better-vision-for-robonaut
[14:26] <Ben-AstroSoc> that sorta thing is waaaaaaaay over my head :')
[14:29] <AndyEsser> Thought it might've been of interest
[14:31] <Ben-AstroSoc> yeah definitley
[14:31] <Ben-AstroSoc> considering the boston dynamics video that's going around
[14:35] <Ben-AstroSoc> actually getting hints of moon coming through in the low-ISO frames
[14:36] <Ben-AstroSoc> huh
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[14:48] <Ben-AstroSoc> eh, 2nd one didn't come out as well, didn't look like it had aligned when stacking
[14:49] <Ben-AstroSoc> 25% into processing the moon clips
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[15:09] <SpacenearUS> New vehicle on the map: 03W0RC-12 - 12http://tracker.habhub.org/#!qm=All&q=W0RC-12
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[15:10] <SpacenearUS> New vehicle on the map: 03K0DCW-12 - 12http://tracker.habhub.org/#!qm=All&q=K0DCW-12
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[15:15] <markireland> Hi - I tested my gopro black with 4x AA energizer lithiums and got ~5 hours of recording time - which is way more than I need. The requirement for GoPro is 5v 1a - ( I realise that I supplied 6v+ (~1.6v x 4) during this test). My question is two-fold: 1. Could I wire another camera in parallel and expect ~2.5hrs of recording time on both cameras? 2. Should I use a regulator or some similar voltage reducing device to get
[15:15] <markireland> The second camera is also a GoPro Hero 4 Black
[15:19] <AndyEsser> markireland: not an expert - haven't done it myself
[15:19] <AndyEsser> But just because it runs ~5 hours in your office/workshop/lounge etc, it won't run 5 hours when the cold gets to the batteries
[15:20] <LunarMobile> Hello
[15:20] <markireland> Yeah that was a thought
[15:21] <markireland> But just asking in principle really
[15:23] <LunarMobile> Btw 5h on the ultimate lithiums sounds more like 600mA draw
[15:24] <LunarMobile> When I recall correctly that they have 3 Ah
[15:25] <markireland> Hi LunarMobile
[15:25] <LunarMobile> Hi
[15:25] <markireland> So that good or bad - sorry for easy question!
[15:25] <markireland> ?
[15:26] <LunarMobile> Should be good, it's less than the gopro rating
[15:26] <LunarMobile> Could be it draws more current in some situations
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[15:27] <markireland> From the Gopro website about the Hero3+: The battery charge current varies during the charging cycle from 1A to 60mA. The maximum current depends on the source.
[15:27] <markireland> So I assume the 4 is the same
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[15:28] <markireland> so the question remains - in principle could I wire 2 cameras in parallel to 4 AAs and expect 2.5hrs ?
[15:29] <LunarMobile> https://gopro.com/support/articles/hero4-camera-battery-life
[15:31] <gonzo_> generically, if you double the current drain from batteries, you don't get half the time. As the internal resistance of the batteries causes some power loss. Also, the voltage drop due to this risiatance will be doubled. So the point at which thedevice failes on battery voltage will be sooner.
[15:32] <gonzo_> so unless you have a plot of voltage against time, and proper discharge cyurves for the batteries (I think the energiser ones may give that), your best bet is to just try it.
[15:33] <gonzo_> then derate for the cold
[15:36] <daveake> Also, that 5 hours is supplied by the internal battery plus 4 AAs (I assume you used an internal). So, say the internals give you 2 hours, then the externals are addiing 3. So for 2 cameras they'd add 1.5 for each (less a bit as they'd be less efficient as gonzo_ says). So, you need to test without AAs to calculate.
[15:41] <kokey> some poor sod bought a $30k container load of these http://imgur.com/GtCB9hK
[15:42] <daveake> oh wow
[15:44] <Ben-AstroSoc> that picture's been around for years
[15:45] <gonzo_> a cheap supply of rawl bolts
[15:46] <R34lB0rg> looks like a geiger counter
[15:46] <edmoore> don't buy shit from china
[15:46] <Ben-AstroSoc> http://i.imgur.com/ZMyHEp6.png don't think i can get any more detail than this out :/
[15:46] <R34lB0rg> Ben-AstroSoc, nice
[15:47] <edmoore> so thoughtful of twitter to email me to ask if I'm going to the brit awards this evening
[15:47] <Ben-AstroSoc> can't decide if it looks better than the first one http://i.imgur.com/bIngoEt.png
[15:48] <edmoore> 50 baud rtty is nice when you're using servos too because you can use one timer for everything
[15:48] <edmoore> 2nd looks better to me Ben-AstroSoc
[15:48] <Ben-AstroSoc> the sharper one?
[15:48] <Ben-AstroSoc> i might tweak the colour balance on it, looks too green to me
[15:49] <edmoore> it does looks quite green yes
[15:49] <LunarMobile> Gonzo is right btw that the energizer datasheets have discharge plots
[15:51] <R34lB0rg> Ben-AstroSoc, the first one shows more details
[15:51] <Ben-AstroSoc> yeah, i think it'll look better if i fix the colour balance
[15:51] <Ben-AstroSoc> migh'tve slightly oversharpened it
[15:54] <markireland> Sorry was away - thanks gonzo_ & daveake - I will test. It's the only way of knowing really.
[15:58] <WillDWork> is stratodean going back up soon?
[15:59] <daveake> dunno; not heard anything
[16:00] <daveake> oh sory ignore me ask him ^^ :)
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[16:08] <markireland> Hi WillDWork
[16:08] <markireland> There are plans afoot for sure
[16:08] <markireland> It will be tied in with work - I work for the BBC now
[16:09] <AndyEsser> I'm so sorry
[16:09] <AndyEsser> :P
[16:09] <markireland> lol
[16:09] <Geoff-G8DHE-M> :)
[16:10] <markireland> In fact I am here at work now but about to go home - bye for now!
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[16:12] <Ben-AstroSoc> http://i.imgur.com/7Vw0BUf.png i think this one's come out better
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[19:15] <hyte> Hi, quick question. Can you put a white flashing light (led approx 0.2hz) on a hab and fly it at night?
[19:18] <edmoore> yes
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[19:34] <hyte> cheers
[19:59] <Ben-AstroSoc> http://i.imgur.com/xgwjLmV.jpg PCB coming along, this is the component board, IO board clipping on top
[20:13] <mfa298> edmoore: re twitter emailing about brits - they've obviously done so much gmail is seeing it as spam now :D
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[20:28] <fsphil> Ben-AstroSoc: nice jupiter
[20:29] <Ben-AstroSoc> I can do one better now
[20:30] <Ben-AstroSoc> https://usercontent.irccloud-cdn.com/file/mbQZ8kOP/IMG_0993.PNG
[20:30] <fsphil> interesting curvy moons. lens effect or vibration?
[20:31] <Ben-AstroSoc> No idea to be honest
[20:31] <Ben-AstroSoc> Might be limitation of telescope
[20:31] <Ben-AstroSoc> Or my lens setup
[20:31] <Ben-AstroSoc> Only 2x Barlow
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[20:31] <Ben-AstroSoc> I selected best 15% frames so I'm not sure it's vibration
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[20:35] <Ben-AstroSoc> Wanna try and do a time lapse
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[21:01] <AndyEsser> Ben-AstroSoc: you seem to have an alarming lack of decoupling capacitors on vcc rails
[21:02] <Ben-AstroSoc> Teammate might have put them with the power supply, I'll check
[21:03] <russss> I think that looks like lens distortion
[21:03] <AndyEsser> Ideally you want them as close to the pins as possible
[21:04] <russss> is that a reflector telescope? You may not have it collimated well enough
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[21:05] <Ben-AstroSoc> It's a Celestron Nexstar 6se, yeah
[21:05] <Ben-AstroSoc> They might be on the next board up, andy, so he might have put them pretty close. I'll check what he's planning
[21:06] <AndyEsser> That is not a cheap telescope
[21:06] <AndyEsser> but looks good
[21:07] <AndyEsser> s/googd/cool
[21:08] <Ben-AstroSoc> Me, my brother and my dad forked out for birthdays and Christmas last nov/dec for it :')
[21:08] <Ben-AstroSoc> Have a suspicion I'm nowhere near the limit it can photograph
[21:08] <AndyEsser> nice
[21:09] <AndyEsser> I wouldn't mind a fancy scope
[21:09] <edmoore> u have a rigol
[21:10] <fsphil> hah
[21:11] <AndyEsser> funny...
[21:14] <AndyEsser> time to try and convert this circuit diagram to a PCB I guess, after a final proper check
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[21:16] <Rebounder> Ben-AstroSoc: what camera do you hvae for the scope?
[21:16] <russss> Ben-AstroSoc: yeah I'd suspect collimation issues then, it's always a bit of a pain
[21:16] <Ben-AstroSoc> Canon 60D
[21:16] Action: Ben-AstroSoc googles collimation
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[21:16] <SP9UOB-Tom> evening All
[21:17] <Rebounder> Ben-AstroSoc: nice, you have to hack something to use it to track HAB :)
[21:17] <fsphil> I've always wanted to do that
[21:17] <Ben-AstroSoc> The scope?
[21:18] <fsphil> there's some great video of people videoing weather sondes bursting
[21:19] <fsphil> https://www.youtube.com/watch?v=0lG3zr0yaJw
[21:19] <Ben-AstroSoc> Yeesh this collimation thing is complicated
[21:19] <russss> there is a knack to it
[21:20] <russss> basically if it's not collimated then stars don't look like points of light
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[21:20] <Ben-AstroSoc> Right
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[21:22] <fsphil> https://www.youtube.com/watch?v=mG7xFt1FpCc
[21:23] <fsphil> oh even better, https://www.youtube.com/watch?v=csGrTZrFK2w
[21:24] <fsphil> almost directly overhead
[21:24] <Rebounder> amazing
[21:26] <Upu> I'm trying to get the guy who does these https://www.flickr.com/photos/45436646@N08/page3 to point his telescope at one of our balloons
[21:27] <fsphil> finding it is the trick
[21:27] <fsphil> easier to track from the launch site
[21:27] <fsphil> some great shots there
[21:28] <AndyEsser> really is
[21:28] <AndyEsser> :)
[21:32] <fsphil> reminded me of https://www.youtube.com/watch?v=AQPI1EsTWxU
[21:37] <Rebounder> :)
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[21:43] <Upu> heh Rob
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[22:10] <SP9UOB-Tom> night all
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[22:47] <fsphil> anyone any ideas why the usart on an stm32 isn't receiving characters? scope shows the proper signal on the line, receiver is enabled and the pin is in the proper AF mode
[22:48] <fsphil> the RXNE flag never gets set
[22:49] <mattbrejza> ive had weirdness where when the overflow flag is set it then wont receieve anything until you clear that flag
[22:50] <fsphil> oh, lemme check that
[22:50] <mattbrejza> i also have some other weirdness where the uart just doesnt seem to work when the debugger is attached
[22:50] <fsphil> it's transmitting ok
[22:52] <Laurenceb_> are you using st periph lib or cube?
[22:53] <fsphil> just me and the registers
[22:53] <Laurenceb_> ah hardcore
[22:54] <Laurenceb_> timing is ok on the tx data?
[22:54] <Laurenceb_> what is it connected to?
[22:54] <fsphil> desktop pc via ftdi-style cable
[22:54] <Laurenceb_> ah I get it
[22:54] <Laurenceb_> ok so it must be ok timing and config wise
[22:56] <fsphil> there are a few examples of receiving using the st periph libs, and they set the pin to just input
[22:56] <fsphil> rather than AF
[22:56] <fsphil> doesn't make sense
[22:59] <fsphil> this is from a libopencm3 example: pio_set_output_options(GPIOA, GPIO_OTYPE_OD, GPIO_OSPEED_25MHZ, GPIO3);
[23:00] <fsphil> I'm not doing anything like this, lets see what this does
[23:07] <fsphil> boo, nothing. will come back to it later
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[23:18] <SpeedEvil> SpaceX Verified account @SpaceX
[23:18] <SpeedEvil> Team opting to hold launch for today. Looking to try again tomorrow; window also opens at 6:46pm ET. Rocket and spacecraft remain healthy.
[23:18] <fsphil> aww
[23:19] <Ben-AstroSoc> damn
[23:19] <Ben-AstroSoc> wind violation?
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[00:00] --- Thu Feb 25 2016