highaltitude.log.20160218

[00:00] <Oddstr13> well, it is essentialy a breakout board I'm working on, so..
[00:01] <Oddstr13> for the ATmega328PB :3
[00:03] <Ian_> I read the discussion about the pb the other day but the details have faded. 2x UARTs I believe, which has to be nice.
[00:04] <Oddstr13> gona make a ukhasnet node board when I get around to it, but feelt like making a generic dev board first
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[00:05] <Oddstr13> what I've got so far; https://dl.dropboxusercontent.com/u/4306267/ShareX/2016/02/2016-02-18_01-05-13.png
[00:06] <Oddstr13> but I feel like I should rearrange the pinout on the headers to get vcc and gnd close to the data busses
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[00:12] <Ben-AstroSoc> i think i'm being stupid
[00:12] <Ben-AstroSoc> is boolean a native type in C
[00:12] <Ben-AstroSoc> google tells me it's bool
[00:13] <Ben-AstroSoc> google hasn't fixed my compiler error ._.
[00:14] <Laurenceb_> hmm kicad seems to have improved
[00:14] <Laurenceb_> almost looks usable
[00:14] <MikeUoN> Yes, I've heard good things about the latest version
[00:15] <mattbrejza> protip: dont try to merge kicad and eagle boards onto one panel
[00:16] <MikeUoN> really? Why not? D:
[00:16] <mattbrejza> well kicad can open eagle boards, but there are various ways where it doesnt quite go right
[00:16] <mattbrejza> it is mostly ok though
[00:17] <MikeUoN> ah
[00:17] <mattbrejza> in the end i ended up merging gerbers in gerbv
[00:17] <mattbrejza> but i had to draw teh overall outline in eagle
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[00:17] <mattbrejza> then carefully set an offset in teh orgin of the kicad gerbers so they would sit in exactly the right place once merged
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[00:23] <Ben-AstroSoc> TIL you can't declare global variables in C
[00:24] <Ben-AstroSoc> do you just have to declare them as fields?
[00:25] <mattbrejza> you can kinda make things global if they are in #include headers
[00:25] <mattbrejza> not that you should use that all teh time
[00:25] <Ben-AstroSoc> i had 3 variables i was declaring as global in my gps_init function as they wer ebeing used elsewhere to confirm airborne dynamic model
[00:25] <mattbrejza> also you can use 'extern'
[00:26] <Ben-AstroSoc> declaring them as fields seems to have solved it
[00:26] <mattbrejza> you can declare variables outside of functions, usually put at the top of the file
[00:26] <mattbrejza> then its global for tht file
[00:27] <Ben-AstroSoc> i'm not declaring them as static, hope that doesn't make a difference
[00:27] <Ben-AstroSoc> 21 errors down 8 to go
[00:28] <mattbrejza> http://stackoverflow.com/questions/1433204/how-do-i-use-extern-to-share-variables-between-source-files-in-c
[00:28] <Ben-AstroSoc> thanks
[00:28] <Ben-AstroSoc> only using the one source file at the moment so
[00:29] <mattbrejza> yea then global variables for a file can be written at the top of the file outside any functions
[00:29] <Ben-AstroSoc> yep
[00:30] <Laurenceb_> you use extern for "global" stuff in c
[00:30] <Laurenceb_> in the header
[00:31] <mattbrejza> yea that link explains it better than i did (for actual global variables over multiple functions)
[00:31] <mattbrejza> *files rather
[00:31] <Ben-AstroSoc> yeah i think i understand it
[00:32] <Ben-AstroSoc> it reckons i've got the names of my interrupt sources wrong -.-
[00:32] <mattbrejza> well its probably right
[00:32] <Ben-AstroSoc> i copied it from the datasheet
[00:32] <Laurenceb_> beware that this can easily result in spaghetti code
[00:32] <Laurenceb_> although it doesnt have to if you are organised and follow a consistent system
[00:33] <Ben-AstroSoc> 'ISR(USART_RXC_vect) and ISR(TIM1_OVF_vect)
[00:33] <mattbrejza> http://www.nongnu.org/avr-libc/user-manual/group__avr__interrupts.html see teh big table
[00:33] <Laurenceb_> also on e.g. an 8 bit system a >8 bit variable changed from an ISR or thread cannot be simple read from somewhere else
[00:33] <Laurenceb_> without some form of locking/mutex whatever
[00:34] <mattbrejza> cli(); modify_16bit_variable(); sei();
[00:36] <Ben-AstroSoc> a'ighit fixed my interrupts
[00:36] <Ben-AstroSoc> that table is more helpful than the datasheet
[00:36] <Ben-AstroSoc> 3 errors 1 warning lets go
[00:37] <mattbrejza> its odd they didnt keep consistancy between teh datasheet and the header file like they do with everything else
[00:40] <Ben-AstroSoc> i think it's treating my default case in a switch case statement as a label then throwing a weird error
[00:43] <Ben-AstroSoc> interesting
[00:43] <Ben-AstroSoc> fixed it by adding a second set of {}
[00:43] <Ben-AstroSoc> http://stackoverflow.com/a/92439
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[00:54] <Ben-AstroSoc> ayy fixed the fatal error i had
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[00:54] <Ben-AstroSoc> tackling the last error and warning tomorrow
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[03:36] <SpacenearUS> New position from 03IK8SUT-11 after 0318 hours silence - 12http://tracker.habhub.org/#!qm=All&q=IK8SUT-11
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[06:50] <garymortimer> Morning all, is Ivy Chimneys on?
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[07:10] <daveake> Morning
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[07:33] <SpacenearUS> New vehicle on the map: 03JE6RHS-7_chase - 12http://tracker.habhub.org/#!qm=All&q=JE6RHS-7_chase
[07:34] <SpacenearUS> New vehicle on the map: 03yggggvv_chase - 12http://tracker.habhub.org/#!qm=All&q=yggggvv_chase
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[07:37] <garymortimer> morning Dave
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[07:51] <Upu> mornig
[07:51] <Upu> +n
[07:52] <garymortimer> morning
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[08:04] <fsphil> salut
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[08:06] <daveake> Top o' the mornin' ta ya
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[08:12] <fsphil> what's the craic
[08:12] <fsphil> I have never said that out loud
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[08:12] <Vaizki> a morning most fantastic indeed mesdames et messieurs
[08:12] <fsphil> fog and ice here
[08:13] <fsphil> fun times
[08:13] <garymortimer> For me its mostly rain and Autumn coming on.
[08:13] <garymortimer> We need teh rain mind
[08:13] <daveake> Craic of dawn, that's what :-(
[08:13] <fsphil> do you get much in the way of seasons there garymortimer?
[08:14] <Vaizki> may I propose restraint in the field of complaining about the weather when a Finnish person is present? :D
[08:14] <fsphil> we're not finnished
[08:14] <garymortimer> Where I am yes, we are at the foot of the Drakensberg so range between -12 and 45 over the year
[08:14] <fsphil> yikes
[08:14] <Vaizki> actually yesterday was pretty good but today it's back to a very slippery gloom
[08:15] <fsphil> I read that as "slippery doom"
[08:15] <fsphil> which might work too
[08:15] <garymortimer> Yeah inland its more stable, we can have snow up here and motor down to Durban about 120 km away and swim in a warm Indian ocean mid winter!
[08:16] <fsphil> nice
[08:16] <Vaizki> swim? isn't the place full of great white sharks :)
[08:16] <garymortimer> this is why we need the rain http://www.reuters.com/article/us-safrica-drought-idUSKCN0VQ12A although its too late for crops this year. We have a dry season in winter, three months not a cloud in the sky but cold
[08:16] <daveake> Learn to swim fast
[08:17] <garymortimer> Well yes it is Vaizki but there are nets.
[08:17] <fsphil> don't fly payloads with samples of blood
[08:17] <garymortimer> when this is on http://www.sardinerun.com/sardinerun.asp even more sharks
[08:18] <Vaizki> I want to bring my family to SA for a vacation really.. but I think we'd go to cape town
[08:18] <daveake> Though live images of sharks circling would be cool
[08:18] <fsphil> mmm
[08:18] <fsphil> ____/\____
[08:22] <fsphil> they're ugly beasties
[08:22] <garymortimer> Cape Town is great but we have better mountains this side ;-) Pubs on top as well http://www.sanimountain.co.za/ 2874m up
[08:22] <daveake> $$DA_DUM__DA_DUM__
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[08:22] <Vaizki> yes I'm sure but I know cape town a bit so would be an easy place to vacation :)
[08:23] <Vaizki> and 2874m.. it'll take me a week to get used to the altitude :P
[08:23] <fsphil> hah
[08:23] <daveake> I'm looking forward to HAB season when habs fly and garymortimer becomes pubbot
[08:24] <Vaizki> my younger kid is 4yo so vacationing in hike-heavy locations is a bit painful
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[08:34] <SpacenearUS> New vehicle on the map: 03CALLSIGN123_chase - 12http://tracker.habhub.org/#!qm=All&q=CALLSIGN123_chase
[08:38] <fsphil> yekaterinburg
[08:44] <garymortimer> Thanks Dave ;-) Vaizki, you drive up, https://www.google.co.za/maps/place/Sani+Pass,+Mkhomazi+Wilderness+area/@-29.614821,29.3268318,11.75z/data=!4m2!3m1!1s0x1ef4827516d5bab3:0xb4a0e56c87edeef2
[08:44] <garymortimer> Cape Town is lovely
[08:45] <Vaizki> I don't mean difficulty in getting there.. just difficulty in getting used to lower levels of oxygen and pressure
[08:46] <Vaizki> mexico city at 2200m is fine for me, even 2400 is ok.. but quito at 2800+ .. not so much
[08:46] <Vaizki> I won't die at 2874m but I might be pretty close to useless :)
[08:47] <gonzo_> I must be super human then. I can be useless at sea level
[08:48] <garymortimer> Its what the pubs for ;-)
[08:48] <Vaizki> oh don't worry I can also be useless below sea level
[08:48] <Vaizki> at least in death valley when it's +50
[08:49] <gonzo_> I don't do water. Even a deep bath is too much
[08:55] <garymortimer> Is Ivy Chimneys still happening??
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[09:08] <AndyEsser> morning
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[09:11] <AndyEsser> dbrooke: cheers -that was also on my list to double check as it was from memory I was doing that
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[09:12] <Vaizki> your inclusion of the RTC on the board made me think in bed.. is there any downside to using a backup battery with upu's ublox module? the upsides are multiple but not sure if there's a tradeoff since the battery clip is not installed by default
[09:13] <AndyEsser> Vaizki: not that I'm aware of
[09:13] <AndyEsser> hence why the battery backup is connected to the GPS :)
[09:14] <Vaizki> upsides are at least a quick TTFF after a possible brownout / reset, keeping the RTC in the ublox running etc
[09:14] <Vaizki> yea I was just thinking of using the coin cell
[09:14] <AndyEsser> Yep, that's the plan :)
[09:16] <Vaizki> remember J1
[09:16] <Vaizki> if you are using the same module I am
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[09:17] <AndyEsser> Vaizki: J1?
[09:17] <eroomde> J1 is a test bay for rocket engines about 40m from my chair
[09:17] <AndyEsser> ¬¬
[09:18] <AndyEsser> eroomde: wait... you don't have a chair
[09:18] <eroomde> i don't know what that means and wish it would stop
[09:18] <AndyEsser> you have one of these hipster standing desks
[09:18] <eroomde> i do
[09:18] <eroomde> i also have a chair
[09:18] <AndyEsser> fair enough :P
[09:20] <eroomde> chair of the department for wishful thinking and cable harnesses
[09:20] <AndyEsser> Never thought of you as a wishful thinker ;)
[09:21] <eroomde> that's why i do this rather than get a proper job
[09:21] <AndyEsser> "proper job"
[09:21] <eroomde> like in the city for lots of money
[09:22] <Vaizki> AndyEsser, my M8Q module has a J1 jumper that needs to be open to use the backup coin cell
[09:22] <AndyEsser> I'm using M8C's and never seen a mention of that
[09:22] <AndyEsser> Is yours a breakout board? or the chip direct?
[09:23] <Vaizki> breakout with antenna, lna and saw included
[09:23] <AndyEsser> Ah
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[09:28] <WillDWork> does anyone know if Simrun still has his Ubuntu repo for dl-fldigi working and up to date?
[09:29] <AndyEsser> no sign of dl-fldigi in an aptitude search :(
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[09:33] <eroomde> no sign of simrun for yrs either
[09:33] <WillDWork> no - thought not
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[09:38] <AndyEsser> would a Ubuntu repository for dl-fldigi be useful?
[09:39] <eroomde> poor customer
[09:39] <eroomde> called the office to ask if we use matlab to be compatible with something they do
[09:39] <eroomde> unfortunately it was me that answered
[09:39] <eroomde> and me before coffee
[09:39] <AndyEsser> uh oh
[09:40] <AndyEsser> Do they now wish they'd never called?
[09:40] <eroomde> they know me
[09:40] <eroomde> they'll forgive
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[09:47] <eroomde> i spammed the keyboard in the style of a cat jumping on it whilst on a datasheet for a voltage regulator and a window came up saying 'no matches for 'Nagasaki''
[09:47] <eroomde> i've literally no idea how that happened
[09:48] <eroomde> something about monkeys and typewriters and shakespear
[09:48] <AndyEsser> haha
[09:50] <Vaizki> hit harder and you will get Hiroshima
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[09:58] <AndyEsser> o/ RocketBoy
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[10:09] <SpacenearUS> New position from 03TestiN after 0310 hours silence - 12http://tracker.habhub.org/#!qm=All&q=TestiN
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[10:23] <eroomde> adamgreig: do you play tikz in jupyter notebooks? It's f*cking great
[10:23] <eroomde> i do not promise this is great tikz but it's so helpful
[10:23] <eroomde> https://gist.github.com/eroomde/073177defa8bc3f5837b
[10:23] <AndyEsser> eroomde: he's on holiday now
[10:23] <eroomde> oh yeah
[10:24] <eroomde> well anyway tikz in jupyter notebook is a great thing
[10:24] <AndyEsser> wait, that notebook outputs the drawing at the bottom?
[10:24] <eroomde> yes
[10:24] <AndyEsser> that's kind of awesome
[10:24] <AndyEsser> I love that it looks almost handdrawn
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[10:24] <eroomde> using tikz which is a latex graphical library
[10:24] <AndyEsser> but my god... that's some awful code above :)
[10:25] <pb0ahx> !flights
[10:25] <SpacenearUS> 03pb0ahx: Current flights: 03hkSOL1 10(7acb), 03Ivy Chimneys Primary  10(2ac8)
[10:26] <pb0ahx> !?
[10:26] <eroomde> it's slightly clunk but i think the answer is probably just layers if macros
[10:26] <eroomde> layers of*
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[10:39] <fsphil> heh, temp sensor in the rfm module I'm trying is +12c out
[10:40] <eroomde> from a paper on a theromofluid simulation technique which has matched experimental stuff quite well, 'excitement about this technique is tempered somewhat by this example requiring over two million CPU-hours to complete'
[10:40] <eroomde> a rare note of self awareness
[10:41] <fsphil> that is a slight disadvantage
[10:48] <Rebounder> any sign of the swiss guys=
[10:48] <Geoff-G8DHE> Is that shool really launching today, prediction shows it going stright out to sea ?
[10:49] <eroomde> the perfect place for a shool
[10:49] <eroomde> of fish
[10:49] <Geoff-G8DHE> indeed!
[10:54] <Ben-AstroSoc> worked out at 1am that c doesn't let you assign arrays to other arrays
[10:55] <Ben-AstroSoc> but my cod ebuilds now :3
[10:55] <AndyEsser> Ben-AstroSoc: that statement just nearly gave me a stroke
[10:55] <eroomde> what is with all the fish today
[10:55] <AndyEsser> what are you trying to do?
[10:55] <AndyEsser> eroomde: It's fishday
[10:56] <Ben-AstroSoc> i spent 3 hours getting avr studio to work on my laptop then finally got roundto compiling the main program
[10:56] <eroomde> yes assigning arrays to arrays is a bit scary in principle
[10:56] <Ben-AstroSoc> then spent another hour killing alll the compiuler errors
[10:56] <eroomde> it will let you have an array of pointers to arrays
[10:56] <AndyEsser> Ben-AstroSoc: do you have a makefile, or does AVR studio handle that all for you?
[10:56] <Ben-AstroSoc> avr studio handles it
[10:56] <AndyEsser> hmm
[10:57] <Ben-AstroSoc> although for this particular build you have to do a bunch of it manually
[10:57] <eroomde> it's totes amazebals worth it to write your own makefile at some point
[10:57] <AndyEsser> make sure, if you can, don't know where... to enable all compiler warnings and set warnings as errors etc
[10:57] <eroomde> it helps you understand
[10:57] <Ben-AstroSoc> yeah, i need to look into it properply at some point
[10:57] <AndyEsser> always get proper ply, not fake ply
[10:57] <eroomde> yep. v2 maybe
[10:58] <AndyEsser> o god... eroomde has is having a negative on me
[10:58] <AndyEsser> has is?
[10:58] <AndyEsser> ...
[10:58] <AndyEsser> BTW, in case any of you wanted some new pictures for home
[10:58] <AndyEsser> http://www.jpl.nasa.gov/visions-of-the-future/
[10:58] <AndyEsser> I suspect this may have already been shared in here
[10:59] <eroomde> only fourtyseven thousand times
[10:59] <AndyEsser> sorry
[10:59] <eroomde> no need to apologise
[11:00] <eroomde> repetition is the mother of psycopathy
[11:01] <Ben-AstroSoc> someone posted a giant gallery of solar body backgrounds on reddit yesterday
[11:01] <Ben-AstroSoc> got a giant mars background now
[11:01] <AndyEsser> Ben-AstroSoc: linky?
[11:01] Action: AndyEsser is a big lover of Mars stuff
[11:02] <SpacenearUS> New position from 03BARC after 032 days silence - 12http://tracker.habhub.org/#!qm=All&q=BARC
[11:02] Action: eroomde snickers
[11:02] <Ben-AstroSoc> oh gof
[11:02] <Ben-AstroSoc> god
[11:02] <Ben-AstroSoc> not more puns
[11:03] <AndyEsser> I missed something....
[11:03] <Vaizki> the bar is raised on the puns
[11:08] chris_99 (~chris_99@unaffiliated/chris-99/x-3062929) joined #highaltitude.
[11:10] <gonzo_> give us a break
[11:11] <gonzo_> or it will be a marathon pun session
[11:12] <pb0ahx> frequentie of barc ??? some body can help
[11:12] <AndyEsser> !dial BARC
[11:12] <SpacenearUS> 03AndyEsser: Can't find a flight doc matching your query
[11:12] <Geoff-G8DHE> Its at its home I think you will find oafter recovery.
[11:13] <Geoff-G8DHE> Oh no it appears to have been launched again my error!
[11:13] <Geoff-G8DHE> !dial barc
[11:13] <SpacenearUS> 03Geoff-G8DHE: Can't find a flight doc matching your query
[11:13] <Geoff-G8DHE> !flights
[11:13] <SpacenearUS> 03Geoff-G8DHE: Current flights: 03hkSOL1 10(7acb), 03Ivy Chimneys Primary  10(2ac8)
[11:14] <AndyEsser> interesting... if the horizon for BARC is accurate... I should be able to receive it
[11:14] <AndyEsser> just seen that it _was_ received in Chester
[11:14] <AndyEsser> and thinking "But... my dongle is sat on my sofa"
[11:14] <AndyEsser> forgot that Uni of Chester sometimes run a listening station
[11:15] <AndyEsser> looks like it'll have landed by the time I get home for lunch anyway
[11:15] <pb0ahx> F5APQ received him also
[11:16] <Geoff-G8DHE> Its 0n 434.45MHz
[11:16] <AndyEsser> apparently it's drawing 175 amps...
[11:17] <Geoff-G8DHE> very fluttery signal for some reason, looks like a lot of spin on it
[11:18] <pb0ahx> the speed of barc ??
[11:18] <SpeedEvil> woof
[11:18] <AndyEsser> about the same as the speed of sound
[11:18] <AndyEsser> :)
[11:18] <pb0ahx> hihi
[11:20] <eroomde> Ben-AstroSoc: saw this and thought of you
[11:20] <eroomde> http://imgur.com/5zE08DX
[11:22] <AndyEsser> nice
[11:22] <pb0ahx> some body can tel me the details of Barc pse
[11:23] <Geoff-G8DHE> !dial barc
[11:23] <SpacenearUS> 03Geoff-G8DHE: Can't find a flight doc matching your query
[11:23] <pb0ahx> he is very strong here but no deatils here
[11:23] <eroomde> just try various rtty settings if you can't find anything official
[11:23] <eroomde> like we used to do
[11:23] <Geoff-G8DHE> 434.45MHz 300,8,n,2 600Hz shift
[11:23] <eroomde> 50 or 300 baud
[11:23] <eroomde> 8n1
[11:23] <eroomde> spacing until it looks right
[11:23] <eroomde> see what happens
[11:24] <eroomde> none of this is witchcraft
[11:24] <eroomde> or just go with Geoff-G8DHE :)
[11:24] <pb0ahx> yessssssssss cot him
[11:24] <Geoff-G8DHE> Its actually about 66Hz shift at the moment ;-)
[11:24] <SpacenearUS> New position from 03SP6NVB-11 after 03a day silence - 12http://tracker.habhub.org/#!qm=All&q=SP6NVB-11
[11:24] <eroomde> that's small for 300 baud
[11:24] <pb0ahx> $$BARC,2491,11:24:31,52.68344,-1.97564,20165,120,104,12,-3.1,4.1,175*E024
[11:24] <lz1dev> eroomde: lmao, matlab is terribad
[11:25] <eroomde> yes
[11:25] <eroomde> Ben has to learn it
[11:25] <eroomde> and to be fair, he probably should learn it
[11:25] <eroomde> in as much as know vaguely what it is and how to do it
[11:25] <lz1dev> i've had people tell me, 'have you heard of matlab, its amazing'
[11:25] <eroomde> but then learn python and never look back
[11:25] <pb0ahx> Barc 434.451 300bd / 720shift here
[11:25] <lz1dev> i then feel sad for the rest of the day
[11:25] <AndyEsser> Do I be cheeky and try to get a freebie battery for testing....
[11:26] <eroomde> never hurt anyone AndyEsser
[11:26] <eroomde> but waiting for sponsorship answers is slow relative to just buying
[11:26] <mattbrejza> i rewrote some matlab in c. got >100x speedup
[11:26] <eroomde> so it's a tradeoff on how much your time is worth
[11:26] <AndyEsser> heh - I was mainly just thinking get them to send me a battery to test at temp and stuff to see whether I want to order 10 of them ;)
[11:26] <lz1dev> mattbrejza: you'd get speedup in anything tbh
[11:26] <AndyEsser> rather than specifically sponsorship
[11:26] <AndyEsser> mattbrejza: that is not surprising
[11:26] <lz1dev> you can probbly use scratch and get better performance
[11:26] <AndyEsser> haha
[11:27] <Rebounder> "ivy chimey" is the selectable for BARC?
[11:27] <Rebounder> flightdoc
[11:27] <lz1dev> .payloads 2ac8
[11:27] <SpacenearUS> 03lz1dev: Payload 03RPF-N1 10(2ac8) 03$$RPF-N1 - 03Primary - 03434.15 MHz USB 03RTTY 300/600Hz ASCII-8 none 2
[11:27] <SpacenearUS> 03lz1dev: Payload 03RPF-N2 10(2ac8) 03$$RPF-N2 - no transmissions
[11:27] <lz1dev> Rebounder: nope
[11:27] <mattbrejza> well matlab can call c functions which is why i chose c specfically
[11:27] <eroomde> so can python and julia and others
[11:27] <mattbrejza> and im well aware its a terrible language ;)
[11:27] <eroomde> julia can literaly just call c functions
[11:27] <Geoff-G8DHE> No RPF-1/2 hasn't appeared yet
[11:28] <eroomde> and it's a lisp
[11:28] <eroomde> those two things are enough to make you not want to stand up for a bit
[11:28] <lz1dev> notebooks tho
[11:28] <Geoff-G8DHE> Prediction for RPF-N1/2 doesn't loo good http://predict.habhub.org/#!/uuid=877cb56f53f3b72c3a355d9287f79f7ee0fd8362
[11:28] <lz1dev> how is life possible without them
[11:28] <eroomde> ipython notebooks?
[11:28] <eroomde> or paper ones?
[11:28] <eroomde> i need both
[11:29] <lz1dev> either to answer the quest, but yeah junyper
[11:29] <lz1dev> or w/e that silly new name is
[11:29] <eroomde> jupyter
[11:29] <lz1dev> how do you pronounce that
[11:29] <eroomde> jew-pie-ter i think
[11:29] <lz1dev> awful
[11:30] <lz1dev> you make some great, and then you choose such an awful name
[11:30] <AndyEsser> eroomde: is it not just pronounced like... Jupiter
[11:30] <russss> as far as I can tell the python bit is still called ipython so I still call it ipython
[11:30] <eroomde> yes
[11:31] <eroomde> jupyter is the notebook interface
[11:31] <lz1dev> people write books that are basically notebooks
[11:32] <lz1dev> and naturally, never include the version of anything they are using
[11:33] <lz1dev> its not hard, make virtual env for book, put output of pip freeze on page
[11:35] <Ben-AstroSoc> pahah that matlab rant
[11:35] <Ben-AstroSoc> luckily i only did a few weeks of basic stuff
[11:36] <Ben-AstroSoc> plot(x,y) that'll do
[11:36] <SpacenearUS> New position from 03SP6NVB-12 after 03a day silence - 12http://tracker.habhub.org/#!qm=All&q=SP6NVB-12
[11:36] <AndyEsser> import matplotlib.pyplot as plt
[11:37] <AndyEsser> #generate some data
[11:37] <AndyEsser> plt.plot(altitudes, pressures)
[11:37] <AndyEsser> plt.show()
[11:37] <AndyEsser> done :)
[11:37] <eroomde> AndyEsser: the reason i'm sitting rather than at my hipster standing desk:
[11:37] <eroomde> https://www.dropbox.com/s/qewth2i4mk6ua1v/2016-02-18%2011.35.46.jpg?dl=0
[11:38] <AndyEsser> heh
[11:38] <lz1dev> how to convert regular desk to standing desk
[11:38] <lz1dev> 1. get 16 bricks
[11:38] <eroomde> at great expense
[11:39] <AndyEsser> lz1dev: I did walk in there and think "Most people buy a standing desk. engineers make their own" :)
[11:39] <eroomde> i would like a motorized one
[11:39] <eroomde> but not as much as i want more test equipment
[11:39] <eroomde> so budgets etc
[11:39] <Ben-AstroSoc> the cheeky wine bottle
[11:40] <eroomde> olive oil
[11:40] <eroomde> really nice olive oil actually
[11:40] <eroomde> present for a spanish friend
[11:40] <eroomde> from*
[11:40] <Ben-AstroSoc> fair
[11:41] <AndyEsser> I really need to look at ordering a bench PSU
[11:41] <garymortimer> That BARC balloon is currently in a pub no mans land for me
[11:42] <fsphil> a no go area
[11:43] <eroomde> the predictor doesn't seem to have a burst value?
[11:43] <Ben-AstroSoc> its going to space
[11:43] <AndyEsser> eroomde: I've noticed that on a number of flights recently
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[11:48] <garymortimer> The current landing area is getting into old RAF stomping grounds so back on the map as it were
[11:48] <garymortimer> (for me)
[11:55] <Geoff-G8DHE> Is there a NOTAM for BARC ? I can see the RPF-n1 one ....
[11:56] <mattbrejza> 2m perhaps seeing sa its just burst
[11:58] <eroomde> at 32km
[11:58] <eroomde> doesn't smell much like a <2m thing
[11:58] <mattbrejza> oh ignore me
[11:58] <mattbrejza> but no, i couldnt find a notam either
[11:59] <eroomde> me neither
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[12:00] <AndyEsser> Feb 01-26 0700-1730
[12:00] <AndyEsser> unmanned captive balloon
[12:00] <AndyEsser> that doesn't sound like it...
[12:00] <Geoff-G8DHE> Not the launch location
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[12:01] <mattbrejza> where was it actually launched though? not that i could find any along the wales border area for today
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[12:01] <mattbrejza> AndyEsser: they say 'Free balloon ascent will take place ' for HABs
[12:02] <Ben-AstroSoc> is there a stop character on the telemetry strings for dl-fldigi? i know $$<data>
[12:02] <mattbrejza> \n
[12:03] <mattbrejza> although in theory fldigi only needs to see * then count 4 characters, but i think it needs the \n
[12:03] <mattbrejza> if nothing else it means the telemetry lines up nicely in the text box
[12:03] <Ben-AstroSoc> it's a 2 char checksum right
[12:04] <Ben-AstroSoc> so $$<data>* checksum checksum \n ?
[12:04] <mattbrejza> 4 is preferred
[12:04] <eroomde> 5 is right out
[12:04] <mattbrejza> (but yes, fldigi doesnt know how long the checksum is so it uses the \n character)
[12:05] <Ben-AstroSoc> right
[12:05] <Ben-AstroSoc> i used the equivalent of the checksum function here http://ava.upuaut.net/?p=627
[12:07] <Ben-AstroSoc> i think it get it
[12:07] <Geoff-G8DHE> See here https://ukhas.org.uk/communication:protocol?s[]=ccitt&s[]=checksum
[12:07] <Geoff-G8DHE> CRC16 CCITT is preffered
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[12:10] <SpacenearUS> New position from 03hkLo1 after 033 days silence - 12http://tracker.habhub.org/#!qm=All&q=hkLo1
[12:10] <eroomde> from the wiki 'There have actually been real xor collisions.'
[12:10] <eroomde> no shit
[12:11] <Ben-AstroSoc> oki i understand now
[12:11] <Ben-AstroSoc> with NMEA gps format; N/E is + and S/W is - ?
[12:12] <eroomde> yus
[12:12] <Ben-AstroSoc> gotcha
[12:12] <Ben-AstroSoc> time to learn string building in c
[12:12] <eroomde> BEWARE BUILTIN FUNCTIONS
[12:12] <eroomde> sorry fly in the throat
[12:12] <Vostok> Ben-AstroSoc: huh, no?
[12:13] <eroomde> i would recommend either reading and testing very carefully what your avr implementations of the string building functions are
[12:13] <eroomde> or
[12:13] <eroomde> DIY
[12:13] <Vostok> N/E/S/W is just N/E/S/W in nmea sentences
[12:13] <R34lB0rg> Ben-AstroSoc, scanf and printf are your friends :)
[12:14] <Ben-AstroSoc> wiki says to parse the NSEW into + or -
[12:14] <Vostok> ok, but that's just the desired formatting in this case, not NMEA
[12:15] <Vostok> in NMEA strings, the position is written as 4807.038,N,01131.000,E
[12:15] <AndyEsser> Ben-AstroSoc: I doubt it'll be as simple as replacing +/- E/W etc
[12:16] <eroomde> just make sure you test everything thoroughly with all permutations
[12:16] <eroomde> be wary of printf
[12:16] <eroomde> read the actual documentation for your actual avr versions
[12:16] <eroomde> not a general printf guide
[12:16] <Ben-AstroSoc> so does habitat accept DDMM.mmmmN, DDMM.mmmmE (or whatever) or do i need to mess with it?
[12:16] <Ben-AstroSoc> will do
[12:17] <eroomde> this might help too
[12:17] <eroomde> one sec there's a wiki page somewhere from the dim and distant past
[12:17] <eroomde> most telemetry errors are due to string construction confuse
[12:17] <eroomde> so it's worth being careful here
[12:17] <eroomde> sec
[12:17] <eroomde> https://ukhas.org.uk/guides:common_coding_errors_payload_testing
[12:18] <AndyEsser> Ben-AstroSoc: it will accept the format direct from the Ublox, with the only caveat being having to append the appropriate N/S and E/W indicator
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[12:18] <AndyEsser> You don't need to take it in the DDMM.mmmm format and then convert to decimal
[12:18] <AndyEsser> that way madness lies
[12:18] <Ben-AstroSoc> ok, i don't mind appending the NSEW
[12:19] <R34lB0rg> madness lies in NMEA
[12:19] <Ben-AstroSoc> i suppose it helps all my my data is stored as a string not parsed as an int
[12:19] <AndyEsser> unless you need it in decimal for internal calculations (such as firing a cutdown at a certain longitude/latitude) etc
[12:19] <Ben-AstroSoc> not for this launch anyway
[12:21] <eroomde> thank you for following me on twitter Ben-AstroSoc. I trust that you will be highly underhwlmed and disappointed
[12:21] <Ben-AstroSoc> :^)
[12:21] <AndyEsser> heh
[12:22] <AndyEsser> I don't think you've tweeted since I started following you :P
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[12:26] <Ben-AstroSoc> mm, as all my data is being stored in array (not as a pure number) would it be easier in our case just to iterate through copying what we need across (for the main data anyway) then appending the checksum after?
[12:29] <AndyEsser> the way I do it, is I construct the telemetry string using vsprintf(), and then the result of that is passed into the checksum generator
[12:29] <AndyEsser> then the two are transmitted
[12:30] <Ben-AstroSoc> so checksum is calculated then $$ appended on
[12:33] <AndyEsser> Ben-AstroSoc: this code is heavily WIP - but should give you an idea of what I do, and has been used in an end-to-end test (but no flight)
[12:33] <AndyEsser> http://pastebin.com/56U1TEjy
[12:35] <AndyEsser> Lunch time - popping home to make bacon sarnies
[12:35] <AndyEsser> back in an hour
[12:36] <Ben-AstroSoc> i need to learn my sprintf/snprintf/vsprintf functions
[12:36] <Ben-AstroSoc> gonna go read up
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[13:03] <Ben-AstroSoc> gonna see if i can get it transmitting something then worry about strings after
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[13:08] <fsphil> please always use the snprintf* / strncat versions, where you can specify a limit to the length
[13:10] <gonzo_> (or use a loop and copy the bytes across)
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[13:12] <Ben-AstroSoc> might end up doing that
[13:12] <fsphil> slightly annoying that they don't all use the same function(char *, size_t n, ..) format
[13:13] <fsphil> strncat puts the length as the third parameter
[13:29] <Ben-AstroSoc> hrm, sdrsharp is telling me i haven't got a device selected despite having rtl-sdr (usb) selected and the drivers installed
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[13:35] <R34lB0rg> Ben-AstroSoc, operating system?
[13:36] <Ben-AstroSoc> win8.1
[13:37] <Ben-AstroSoc> works n ow i'd missed a step
[13:37] <Ben-AstroSoc> dont have my antenna yet tho so not sure i'll be able to read anything
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[13:39] <R34lB0rg> you can try ads-b with the stock antenna
[13:44] <mfa298> you ought to be able to pick up broadcast FM with the stock antenna, and your own payload with no antenna
[13:45] <AndyEsser> Ben-AstroSoc: I've had the RTL-SDR pick stuff up without the antenna, and the breadboard just using a piece of wire about 120mm long
[13:45] <mattbrejza> just shove a bit of wire into the rtlsdr coax connector
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[13:48] <Ben-AstroSoc> i mea i'v'e got ~15cm of SMA adaptor connected
[13:48] <AndyEsser> whats at the other end of the ~15cm
[13:48] <eroomde> bash could be easier.
[13:48] <AndyEsser> and what's the cable/wire type
[13:48] <AndyEsser> eroomde: what are you doing in bash?
[13:48] <Ben-AstroSoc> nothing is at the othe rrend of the ~15cm atm
[13:49] <Ben-AstroSoc> it was picking up stuff tho
[13:49] <AndyEsser> if they're close enough - it really shouldn't matter :)
[13:49] <Ben-AstroSoc> i wrote script to puulse 10101010 off the ntx2b just to see if i can read it
[13:51] <AndyEsser> stupid question... EN pin of the ntx2b is connected to +V, right?
[13:51] <eroomde> AndyEsser: some housekeeping scripts to build a bunch of internal tools and put them in the right places
[13:51] <eroomde> on multiple OSs
[13:51] <AndyEsser> ah
[13:51] <Ben-AstroSoc> holyl shit it works
[13:53] <Ben-AstroSoc> is it normal to see 2 small sidebands ~100kHz further up?
[13:54] <eroomde> 13:51:34 Ben-AstroSoc holyl shit it works
[13:54] <eroomde> this is why science is cool.
[13:54] <AndyEsser> we need that on a t-shirt or something
[13:55] <AndyEsser> Ben-AstroSoc: I believe there is such a thing as harmonics when it comes to radio frequencies that can cause such things to occur... but you'll need one of the RF Gurus to confirm :P
[13:55] <Ben-AstroSoc> i mean i feel likel i should be expecting it off of the last 2 weeks of my comms sys module
[13:55] <Vaizki> https://pbs.twimg.com/media/CDMmg0aWIAA8wMv.jpg
[13:55] <AndyEsser> Awesome... there are .engineer TLDs available :)
[13:56] <AndyEsser> Vaizki: hahaha
[13:57] <Vaizki> Ben-AstroSoc, we love screenshots too
[13:58] <AndyEsser> screenshots/diagrams are engineer porn :)
[13:58] <AndyEsser> o yippee... nice long meeting about website design
[13:59] <Ben-AstroSoc> https://usercontent.irccloud-cdn.com/file/ztyzV3M6/Capture.PNG
[13:59] <AndyEsser> I really wish I'd stayed in engineering :(
[13:59] <Ben-AstroSoc> i have 10 credits of rubbish on ui design, it's painful
[13:59] <AndyEsser> Ben-AstroSoc: you need to go all CSI on that
[13:59] <AndyEsser> Zoom!
[13:59] <AndyEsser> Enhance!
[13:59] <AndyEsser> Increase your FFT resolution if the computer can handle it
[14:00] <AndyEsser> what shift are you trying to achieve between 0 and 1?
[14:00] <Ben-AstroSoc> 425Hz
[14:01] <Ben-AstroSoc> Oh we don't have the biasing resistors set up yet
[14:01] <Ben-AstroSoc> So it won't be shifting properly
[14:01] <Ben-AstroSoc> Oh, we do
[14:01] <Ben-AstroSoc> Ignore me
[14:02] <Ben-AstroSoc> Yeah I'm not sure we're getting the right shift
[14:02] <Ben-AstroSoc> Trying to measure it
[14:02] <Ben-AstroSoc> Actually I think we're really close
[14:03] <Ben-AstroSoc> 434,299,500 and 434,299,100 at 100hz step
[14:03] <Vaizki> maybe zoom in a bit on that :)
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[14:07] <Ben-AstroSoc> its as close as it's possible to accurately measure
[14:09] <Vaizki> well put SDR# into USB mode, put in 6k for bandwidth, tune to the signal and check out the resulting audio for the shift
[14:09] <BARC> Hi all, sincere apologies - it's looking like the students who were using our kit today had applied for permission and NOTAM but hadn't had the official confirmation come through.
[14:09] <BARC> Very sorry if this has affected anyone today.
[14:09] <BARC> We had given them strict instruction to make sure that the clearances were in place and we were told this was the case.
[14:10] <BARC> Needless to say, serious words will be had and the students in question won't be operating independently of us in future.
[14:10] <eroomde> maybe take a £2k deposit or something
[14:10] <eroomde> this is the hab version of trashing a rental apartment
[14:11] <BARC> It's not a terrible idea.. certainly this will affect how we work with students in future
[14:11] <nick_> What kind of students?
[14:11] <BARC> university
[14:11] <BARC> old enough to know better!
[14:12] <lz1dev> not entirely sure about that
[14:12] <eroomde> much of ukhas was built by undergrads
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[14:12] <Vaizki> Ben-AstroSoc, here is an example https://dl.dropboxusercontent.com/u/367935/vzk-1%20tracker.png
[14:13] <Vaizki> that is SDR Console instead of SDR# but same principle
[14:14] <nick_> Failing courses is a good disincentive...
[14:15] <Ben-AstroSoc> i'm 99% we have the shift we want
[14:15] <Ben-AstroSoc> gonna work out decoding it now
[14:15] <Vaizki> as you can see from the screenshot, dl-fldigi displays a nice waterfall for the audio frequencies it works with
[14:16] <Vaizki> and incidentally that shift is also 425Hz.. :)
[14:20] <Ben-AstroSoc> what's the diference between dl-gldigi hab mode and non hab mode?
[14:21] <Vaizki> hab mode activates the flight browser and upload to habhub
[14:24] <Ben-AstroSoc> right
[14:24] <Ben-AstroSoc> not seeing anything in dl-fldigi though i'm 99% certain i havent set it u right
[14:25] <Vaizki> you are using vb-cable to pipe audio out of sdr# and into dl-fldigi?
[14:25] <Ben-AstroSoc> yeah
[14:26] <Vaizki> and nothing on the waterfall?
[14:26] <Ben-AstroSoc> i renamed the microphone input to SDR and pointed dl-fldigi at it
[14:26] <Vaizki> huh?
[14:26] <Ben-AstroSoc> https://ukhas.org.uk/guides:sdr_tracker following this
[14:28] <Vaizki> ah ok I have not renamed anything.. is sdr# outputting to the vb-cable also?
[14:28] <Vaizki> in the "Audio" tab of the sidebar
[14:29] <Ben-AstroSoc> i just checked it was outputting to windows directsound cable input, changed it to mme cable input and it seems to be working on dl-fldigi
[14:30] <Ben-AstroSoc> oh, sdr# has to be playing for dl-dldigi to see it
[14:30] <Ben-AstroSoc> i'm stupid
[14:30] <AndyEsser> :)
[14:30] <AndyEsser> oof.. is there a fine or something associated with doing that BARC?
[14:30] <AndyEsser> from the CAA
[14:31] <Ben-AstroSoc> got the waterfall but its not showing my signal, immam play aroud with it
[14:31] <Vaizki> well you are 90% of the way there
[14:33] <AndyEsser> Ben-AstroSoc: going to assume that's you that has followed me on Twitter?
[14:33] <Ben-AstroSoc> Yeah followed a load of Hab stuff earlier :p
[14:33] <AndyEsser> welcome
[14:33] <AndyEsser> apologies for the inane mumblings of a grumpy old fart :)
[14:35] <Ben-AstroSoc> it's pickingup interference from my phone but no signal :')
[14:37] <AndyEsser> fsphil: what do you do with the AREF pin on the AVRs? are you using it as an actual reference?
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[14:40] <mattbrejza> http://www.atmel.com/images/atmel-8271-8-bit-avr-microcontroller-atmega48a-48pa-88a-88pa-168a-168pa-328-328p_datasheet_complete.pdf pg238
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[14:40] <BARC> AndyEsser we'll be having serious words
[14:40] <mattbrejza> fairly sure if you're using the internal reference the AREF pin should be decoupled or left unconnected
[14:41] <mattbrejza> (from memory and that figure rather than reading the text)
[14:41] <AndyEsser> mattbrejza: ah was this the note you mentioned last night?
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[14:41] <mattbrejza> i was talking about the battery charging last night?
[14:41] <AndyEsser> Ah, I thought it was you that mentioned there was a note in the AVR docs about the AREF pin when not in use
[14:41] <AndyEsser> apologies
[14:42] <mattbrejza> oh right, that wasnt me
[14:42] <AndyEsser> I have a terrible memory ;)
[14:42] <mattbrejza> 24.5.2 ADC Voltage Reference pg243
[14:43] <AndyEsser> mattbrejza: cheers - shall decouple it down to GND
[14:47] <eroomde> i still get recruiter emails based i think on having half an inactive public github repo that had some python
[14:47] <eroomde> asking for a ninja
[14:47] <eroomde> i wonder if any recruiter has mistakenly highred an actual ninja
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[14:47] <eroomde> hired*
[14:48] <eroomde> 'we need a ninja to help us execute in stealth mode'
[14:48] <nick_> How would they know if the ninja turned up to work?
[14:50] <AndyEsser> Do people typically re-use their parachutes?
[14:50] <eroomde> yes
[14:50] <eroomde> why would you not?
[14:50] <AndyEsser> Well... you don't re-use the balloon :P
[14:50] <eroomde> because it breaks
[14:51] <AndyEsser> details :P
[14:52] <eroomde> reuse your chute
[14:52] <eroomde> unless it's biodegradable
[14:53] <AndyEsser> eroomde: and you recommend the rocketman chutes, don't you?
[14:53] <AndyEsser> :P
[14:54] <eroomde> it's hard work dealing with all the winks and banter
[14:54] <eroomde> i'm going to take everything literally from now on
[14:54] <AndyEsser> but I have proper top bants
[14:54] <eroomde> no, i don't
[14:54] <AndyEsser> Are the Spherachutes ok to use, in your opinion?
[14:54] <eroomde> i think they probably glide
[14:55] <eroomde> but if that doesn't bother you too much then fine. they are well made and so on
[14:56] <fsphil> AndyEsser: when using the internal reference, it gets connected to AREF and it's recommended to add a cap between it and ground
[14:57] <fsphil> not strictly needed but would do no harm
[15:02] <eroomde> moar boards https://www.dropbox.com/s/pz74cwm2msqzpaa/2016-02-18%2015.00.46.jpg?dl=0
[15:02] <eroomde> in which we wear out our jtag cable
[15:03] <AndyEsser> fsphil: yea, will just stick a 10uF cap down to earth on it or something
[15:03] <mattbrejza> are you still doing these by hand?
[15:03] <AndyEsser> eroomde: I see why you went for fab now :)
[15:04] <eroomde> that's not all of them by any stretch
[15:04] <eroomde> just flashed ones
[15:04] <eroomde> mattbrejza: feck no
[15:04] <mattbrejza> AndyEsser: something in the range 0.1u-1u is probablt best (ceramic)
[15:04] <nick_> On the subject of JTAG. Anyone successfully set up a system to program O(100) FPGAs?
[15:05] <nick_> Remotely.
[15:05] <eroomde> i mean this with genuine affection
[15:05] <eroomde> but even without the words you know this is a book about programming http://akamaicovers.oreilly.com/images/0636920034889/lrg.jpg
[15:05] <SpeedEvil> nick_: azonenberg is doing fun stuff on that
[15:06] <mattbrejza> yea im not sure why i thought you would bother doing all those by hand
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[15:08] <fsphil> eroomde: or a folk album
[15:10] <eroomde> maybes
[15:10] <fsphil> the hats are too much
[15:11] <eroomde> much tipping
[15:14] <BARC> AndyEsser: what size chute do you need? happy to send you one of ours if you like
[15:14] <Rebounder> cool, they are floating :) hklo1 that is
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[15:15] <AndyEsser> BARC: not sure yet as I'm not sure how much the payload will weight yet - but thank you :)
[15:16] <BARC> AndyEsser: No problem. Ours are 50". We found the rocketman chutes a bit heavy and overengineered so had our own made
[15:16] <BARC> AndyEsser: FYI ours are 90g
[15:17] <eroomde> BARC: what kind of chute are they?
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[15:18] <BARC> eroomde: hemispherical with centre hole.. misspoke, I'm told they're actually 75g
[15:19] <eroomde> impressively light for a good size
[15:19] <BARC> eroomde: similar in design to the spherachutes
[15:20] <AndyEsser> Yea, the 48" Sphereachutes are 82G so that's good :)
[15:20] <eroomde> if you get any more made can i plug a talk at the last ukhas conference
[15:20] <eroomde> on a better design of chute for habs
[15:21] <AndyEsser> cross-form?
[15:21] <eroomde> you payed attention
[15:21] <AndyEsser> BARC: my first payload I'm aiming for a max of about 500-1Kg - your parachute would result in a descent rate of like 2.5m/s :)
[15:22] Action: AndyEsser adds a 1kg weight to the bottom
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[15:22] <AndyEsser> eroomde: I did
[15:22] <bobsaget> hey what is the story with hkLo1?
[15:22] <BARC> erromde: We've made a lot of them. Happy to send one to you if you want to test it.
[15:22] <bobsaget> what type of link is it?
[15:22] <eroomde> i know how hemispheres perform generally
[15:23] <HB9FDK> :<bobsaget> hey what is the story with hkLo1? Yes I wonder too - I am in same country!
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[15:27] <BARC> eroomde: no worries, offers there if you want it
[15:28] <eroomde> the offer to watch the talk is there too :p
[15:31] <eroomde> if you enter every single keysight giveaway competition then it turns out that your chances of winning a bit of test equipment increase to 0
[15:31] <eroomde> this according to the method of sampling I have employed over the last twelve months
[15:32] <Rebounder> BARC: any arguments 50 sv 300 baud telemetry? followed via websdr today
[15:35] <fsphil> use 100
[15:35] <eroomde> half way on log scale
[15:35] <eroomde> nearly
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[15:39] <SpacenearUS> New vehicle on the map: 03hkLoCar_chase - 12http://tracker.habhub.org/#!qm=All&q=hkLoCar_chase
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[15:43] <eroomde> there should be bashcamp
[15:43] <eroomde> week 1 uni
[15:43] <eroomde> maybe bootcamp to teach init systems then bashcamp to teach tools to prevent mental breakdown
[15:44] <eroomde> is there a tool that says 'YOU"RE USING GNU EXEXTENSIONS DICKHEAD' when you give it a script to scan?
[15:44] <eroomde> i would like it
[15:45] <DL7AD1> hi
[15:45] Nick change: DL7AD1 -> DL7AD
[15:45] <AndyEsser> write it then
[15:46] <eroomde> type error
[15:46] <eroomde> expecting yes or no
[15:46] <eroomde> got stupid opinion
[15:46] <eroomde> segfault
[15:47] <eroomde> i'm going to tape a laser pointer to your head and then you can chase it around forever but not be able to get near it
[15:47] <eroomde> and someone else can answer my question
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[15:47] <AndyEsser> Fine
[15:47] Action: AndyEsser sits in corner chewing on soap
[15:48] <sq5kvs> Hi altitude!
[15:48] <eroomde> it's nutricious
[15:48] <eroomde> hi sq5kvs
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[15:50] <sq5kvs> hI eroomde
[15:51] <sq5kvs> nice to see you again
[15:51] <sq5kvs> hkLO1 is a floater? :)
[15:52] <eroomde> i closed my eye during a tooth xray at the dentist earlier
[15:52] <eroomde> to protect them from radiation
[15:52] <eroomde> it sounds stupid but then consider that i am writing bash right now
[15:52] <eroomde> and consider what you are doing right now
[15:53] <kc2pit> eroomde: I've seen empirical evidence that HP^WAgilent^WKeysight actually does let someone win that test equipment once in a while. IIRC, my brother pretty much had to donate it to the i3Detroit hackerspace to avoid paying a rather large tax bill on it.
[15:53] <AndyEsser> staring at the worlds most retarded copy dialog
[15:53] <eroomde> thank god for not declaring taxes
[15:53] <kc2pit> It was going to end up at the hackerspace anyway, though.
[15:53] <eroomde> well that gives me hope
[15:53] <eroomde> plus-epsilon of hope
[15:54] <kc2pit> Heh.
[15:54] <eroomde> just a multimeter would be nice
[15:54] <eroomde> a VNA would be really nice
[15:55] <eroomde> we borrowed a R+S one about 18 months ago and it was lovely and i want it back
[15:55] <eroomde> two happy weeks
[15:56] <kc2pit> I haven't actually done enough RF projects lately to make much use of a VNA, but I still lust after them on principle.
[15:57] <eroomde> i think the tail might wag the dog for me
[15:57] <eroomde> if i had one i'd use it
[15:57] <sq5kvs> will not despise
[15:57] <eroomde> instead a limp along with my humble 3ghz speccan and a directional coupler borrowed from work when shit gets real
[15:57] <kc2pit> I'd like to believe that, but I know how empty my round tuit bin is.
[16:01] <Miek> eroomde: has it got a tracking gen or do you do something else for that?
[16:01] <eroomde> no it hasn't
[16:01] <eroomde> can borrow stuff from work if nec
[16:01] <eroomde> it's built into the scope
[16:01] <eroomde> it's not stella
[16:02] <eroomde> it's broadly similar in spec to the rigol speccans
[16:02] <eroomde> one day when i get fired i will take with me the marconi rf siggen from work in the dead of night
[16:02] <eroomde> 9khz-5.4ghz and amazinfgly good phase noise for a gen of its type
[16:02] <eroomde> and lots of other nice things
[16:03] <eroomde> milled from a block of ali that would have been a national reserve for a squadron of spitfires in ww2
[16:03] <sq5kvs> eroomde: consolation prize ? :)
[16:04] <eroomde> actually what is cool is
[16:04] <eroomde> where cool is cool only if you're into HF stuff
[16:04] <eroomde> and so, not cool
[16:04] <eroomde> but assuming you are, cool
[16:04] <eroomde> what's cool is
[16:05] <eroomde> it has a white noise gen with 50MHz bw
[16:05] <eroomde> so you can use that as the input and it can measure the response from that
[16:05] <eroomde> as if it were a tracking gen
[16:05] <Miek> cool
[16:05] <eroomde> good for hf filters and so on
[16:05] <sq5kvs> my girl has wider bandwitch of noise
[16:05] <eroomde> i might almost learn morse
[16:06] <Miek> i've got access to a nice siggen/specan but neither has the right IO to sync up the sweeps properly :<
[16:07] <eroomde> it's called an intern
[16:07] <eroomde> with graph paper
[16:07] <eroomde> if you don;t have an intern you get to be the intern
[16:07] <eroomde> if you don;t have graph paper you get to buy graph paper on amazon and then read the reviews inexplicably cos it's just graph paper and then 45 minutes later notice you're on a blog dedicated to reviewing different kinds of mechanical pencil
[16:08] <mattbrejza> Miek: sounds like a job for gpib and a script on the computer
[16:08] <AndyEsser> eroomde: sounds like you're speaking from an actual experience of that
[16:08] <Miek> i've been able to sort of hack it together with the trigger signal from one, then fiddling with the sweep time until the result is sort of flat, but it's fairly gross
[16:10] <eroomde> AndyEsser: if you keep dissecting everything i saw i will stab you in the kidney with my rotring rapid-pro 0.5mm
[16:12] <AndyEsser> fair enough
[16:13] <eroomde> after bash there is the RS website and then just the entire concept of margerine
[16:13] <Rebounder> the hkLo1-team around here?
[16:14] <eroomde> i think it's time to abandon today
[16:16] <SpacenearUS> New position from 03IK8SUT-11 after 037 hours silence - 12http://tracker.habhub.org/#!qm=All&q=IK8SUT-11
[16:17] <Laurenceb> this is disturbingly similar to my job
[16:17] <Laurenceb> https://www.youtube.com/watch?v=VDDnuZAL9ps
[16:18] <sq5kvs> Laurenceb: looks like Dilbert trailer :)
[16:20] <sq5kvs> eroomde: you remind me that I actually have two intern girls in my office
[16:22] <eroomde> how do i remind you of that?
[16:22] <eroomde> oh, interns
[16:22] <eroomde> get them to play with usb-gpib converters
[16:22] <eroomde> lol no don't
[16:22] <eroomde> unless you hate them
[16:23] <Laurenceb> PETA's advertising is fucking warped. What the fuck did I just see.ÿ
[16:23] <Laurenceb> irl lolling
[16:25] <sq5kvs> 15km it's in hpa?
[16:25] <sq5kvs> 200?
[16:28] <Laurenceb> what <sq5kvs> ?
[16:31] <sq5kvs> I mean, what pressure is on the 15 000 m
[16:31] <sq5kvs> I;m too lazy to check it :)
[16:32] <Laurenceb> seriously dude
[16:33] <Laurenceb> www.digitaldutch.com/atmoscalc
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[16:34] <sq5kvs> thanks Laurenceb , its for You: http://dilbert.com/strip/2006-12-24
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[16:40] <Laurenceb> heh did i just get trolled
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[16:46] <sq5kvs> it's just an impresion. Dilbert is a inexhaustible source :)
[16:47] <Rebounder> hkLo1 sliding down faster
[16:48] <sq5kvs> unfortunately
[16:49] <SpacenearUS> New vehicle on the map: 03KK4POC-11 - 12http://tracker.habhub.org/#!qm=All&q=KK4POC-11
[16:49] <Rebounder> sq5kvs: was it planned to float "forever" ? a bit tiresome to chase it then..
[16:50] <sq5kvs> Rebounder: hehe, even if, it's much better than balloons from picospace :D
[16:51] <Rebounder> sq5kvs: right, the pacific or the poles would be kinda challenge..
[16:53] <eroomde> Laurenceb: do you remember when you landed on a sand bank in the wash
[16:53] <sq5kvs> I'm waiting for next hf picospace, all my stuff is ready now, the LNA, antenna and the narrowband filters for my rx
[16:53] <Rebounder> sq5kvs: 30m ?
[16:53] <sq5kvs> right
[16:53] <Laurenceb> eroomde: yeah
[16:53] <Rebounder> sq5kvs: lna for hf?
[16:53] <mfa298> I think hkLo1 was supposed to be a solar balloon so will be reliant on heat from the sun to stay up
[16:53] <eroomde> that was shit wasn't it
[16:53] <Laurenceb> yup lol
[16:53] <eroomde> it stopped transmitting exactly when the tied table predicted the sand banks would get submerged
[16:54] <eroomde> we saluted it from hunstanton promenade
[16:54] <Laurenceb> well - disappeared from GSM
[16:54] <sq5kvs> ekhm... as receiver I'm using the rtl dongle. very noisy , and lna isn't bad idea, but only if You have verry narrow filter
[16:54] <Laurenceb> I should do another launch some time
[16:54] <Laurenceb> its been years
[16:55] <eroomde> same
[16:55] <eroomde> 5 yrs
[16:55] <Rebounder> sq5kvs: ah, upconverter?
[16:55] <Laurenceb> I'm kind of planning a simplified rockoon launch
[16:55] <Laurenceb> but then work gets in the way
[16:56] <Laurenceb> - just a demonstration liftoff from balloon
[16:56] <sq5kvs> Rebounder: yes, I have few dongles on my remote site with different kind of antennas and using all by rtl tcp server :)
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[16:57] <sq5kvs> bYE, Time to go
[16:57] <Rebounder> sq5kvs: cool, l8r
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[16:57] <Laurenceb> maybe I should add HAB relay to my equine mesh network
[16:57] <Laurenceb> (current work project)
[16:58] <eroomde> OH (iain, to a library open in vim): 'I don't see why your default would be png - like, what sort of a rapist are you?'
[17:04] <eroomde> if you watch from 43 minutes this is literally my life https://www.youtube.com/watch?v=QFy0ezTOLZs
[17:05] <eroomde> i conclude we are at a professionalism/scale level of F1 circa 1986
[17:05] <eroomde> hopefully i can have a maclaren-like office in 2035
[17:05] <eroomde> just gotta keep working
[17:05] Action: eroomde weeps
[17:11] <kokey> hah
[17:11] <kokey> ouch
[17:11] <kokey> well someone has to suffer through it first so the rest of us can just take it for granted in the future
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[17:14] <namor> dear all. this roman from hklo1. the balloon is coming down. will there apear a predict for the landing site somewhen?
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[17:17] <AndyEsser> http://tracker.habhub.org/#!mt=roadmap&mz=8&qm=1_day&f=hkLo1
[17:20] <namor> thanks a lot. but don't see it yet ;o)
[17:20] <mattbrejza> its showing up as predicted to land near pilsen
[17:24] <namor> thanks again. do you see the prediction on tracker.habhub.org?
[17:24] <mattbrejza> yea
[17:24] <mattbrejza> its moved a bit further south now
[17:24] <SpeedEvil> http://i.imgur.com/izhv2ft.jpg
[17:24] <SIbot> In real units: 2 ft = 0.61 m
[17:25] <mattbrejza> Stod
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[17:30] <namor> i got it. its a blue line ;o thanks for the link!
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[18:35] Nick change: kswtch_ -> kswtch
[18:42] <AndyEsser> right.. time to learn how to use Kicad
[18:45] <mattbrejza> perhaps you should have started doing that last week when adam was still around
[18:46] <AndyEsser> ha, maybe :P
[18:46] <mfa298> my previous experience of doing any sort of electronics cad (eagle or kicad) was you need a good few hours of playing ideally with a decent tutorial.
[18:46] <fsphil> eroomde: what's wrong with png? :)
[18:46] <mfa298> they're not the most intuitive bits of software
[18:46] <AndyEsser> mfa298: Yea... perhaps sat with my laptop on the sofa isn't the best... should probably go and sit in my office and work on it
[18:47] <fsphil> my office is a tip at the moment. scart cables everywhere. I swear these things breed
[18:47] <AndyEsser> scart cables?
[18:47] <AndyEsser> is this the 90's?
[18:47] <Ben-AstroSoc> at least you have an office
[18:47] <fsphil> I know! I haven't used a scart cable in years
[18:47] <mfa298> sat on the sofa probably depends on how good the current telly is. Most of the stuff that's on can be quite persausive to get something more interesting done.
[18:48] <AndyEsser> Ben-AstroSoc: I pay for rent on a 3-bedroom house in order to get an office
[18:48] <AndyEsser> would save myself a decent chunk if I didn't :P
[18:48] <Ben-AstroSoc> nice
[18:48] <AndyEsser> mfa298: Stargate Atlantis
[18:48] <fsphil> oooh which ep?
[18:48] <AndyEsser> so just sat here thnking "I could so totally be Dr. McKay"
[18:48] <AndyEsser> S4 E11
[18:48] <AndyEsser> Be all my sins remembered
[18:48] <AndyEsser> Godzilla Replicator blob
[18:48] <AndyEsser> :)
[18:48] <mfa298> that may not help with doing cad type stuff
[18:48] <mfa298> I'd probably just put the laptop down at that point.
[18:49] <fsphil> ah yes, planet blob
[18:49] <AndyEsser> fsphil: with Friendly Replicator Android
[18:49] <AndyEsser> :P
[18:49] <fsphil> Weirbot
[18:49] <AndyEsser> She just appeared
[18:49] <AndyEsser> I'd forgotten about that
[18:49] <AndyEsser> haven't watched S4/S5 in many years
[18:50] <fsphil> I liked her, was a bit sad when she left
[18:50] <AndyEsser> yea
[18:50] <fsphil> carter never blended in well
[18:51] <AndyEsser> not in SG:A
[18:51] <AndyEsser> but still liked her
[18:51] <fsphil> yeah
[18:51] <AndyEsser> also, always liked Doctor Keller in SG:A :)
[18:51] <AndyEsser> Kaylee from Firefly
[18:51] <AndyEsser> mmmmm
[18:51] <AndyEsser> right... how does one place a component in KiCad :)
[18:51] <AndyEsser> haha
[18:51] <Ben-AstroSoc> rtfm?
[18:51] <chris_99> click the op-amp
[18:51] <chris_99> symbol
[18:51] <fsphil> manuals are overrated
[18:52] <fsphil> says the person currently going through a datasheet
[18:52] <AndyEsser> Ben-AstroSoc: it was a rhetorical question
[18:52] <AndyEsser> not expecting people here to hold my hand :)
[18:52] <Ben-AstroSoc> :D
[18:54] <AndyEsser> *sigh*
[18:54] <AndyEsser> temper lost already
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[18:56] <AndyEsser> quick q - if I have a linear regulator which has a drop-out voltage of 1.5v and an output voltage of 3.3v
[18:56] <AndyEsser> Does that mean I need a minimum of 4.8v input?
[18:56] <fsphil> ideally yes
[18:56] <AndyEsser> hmm
[18:56] <mattbrejza> dropout voltage is dependent on current though
[18:56] <AndyEsser> balls
[18:57] <fsphil> there are regulators with lower drop out voltages
[18:57] <AndyEsser> I'm looking at a low dropout regulator
[18:57] <AndyEsser> 1.2v
[18:57] <AndyEsser> "low"
[18:57] <mattbrejza> mcp1700
[18:58] <AndyEsser> that's not going to work with my batteries, and if I just stick two in series - that'll bugger my charging
[18:58] <AndyEsser> mattbrejza: are you sponsored by MCP btw?
[18:58] <AndyEsser> :P
[18:58] <mattbrejza> lol no
[18:58] <fsphil> the bad guy from TRON?
[18:59] <AndyEsser> why can't KiCad just have everything in its library already
[18:59] <AndyEsser> should go back to Eagle, that has the integration with Farnell
[18:59] <AndyEsser> mattbrejza: cheers for the MCP suggestion, looks good
[19:00] <AndyEsser> 178mV difference at 250mA
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[19:04] <mfa298> AndyEsser: if you're looking for decent efficiency you might be better with a switching DCDC converter rather than regulator.
[19:05] <mfa298> unless you want a bit of heat
[19:06] <AndyEsser> hmm
[19:06] <AndyEsser> without fully modelling it, I'm not sure how well insulated the enclosure will be, or how well it'll dissipate heat
[19:07] <AndyEsser> atm I'd rather generate more heat and deal with that, then it become so cold stuff stops working (batteries!)
[19:07] <mattbrejza> the main reason to use a DCDC converter is you need less AA cells
[19:07] <mattbrejza> (for me)
[19:07] <AndyEsser> I'm not using AA
[19:07] <AndyEsser> LiPo 'flat' pack
[19:07] <mattbrejza> oh right
[19:08] <mattbrejza> i wouldnt normally bother with a DCDC coverter from 4V to 3.3V
[19:08] <AndyEsser> Yea, basically doing 3.7v to 3.3v
[19:08] <AndyEsser> should I just use a resistor to drop the voltage? :P
[19:08] <AndyEsser> (don't answer that - not an actual question)
[19:08] <mattbrejza> problem is the resitor value will change with the current going through it
[19:08] <mattbrejza> so then you need a variable resistor
[19:09] <mattbrejza> and a component to see what teh actual output voltage is, and then adjust the resistor value in a closed loop fashion to keep the output voltage correct
[19:09] <daveake> The 3.7 is also far from a constant
[19:09] <AndyEsser> This is why I said it wasn't an acutal question :P
[19:09] <AndyEsser> actual*
[19:10] <AndyEsser> I also have a +5v input from USB at some times, so need a regulator
[19:10] <mattbrejza> yea but i had already started my description of a LDO
[19:10] <AndyEsser> mattbrejza: it was a beautiful description
[19:10] <mfa298> I'm pretty sure there are some regulators with drop or around 0.3v
[19:10] <daveake> There are
[19:12] <AndyEsser> http://imgur.com/ewkpWta
[19:12] <AndyEsser> It's alive!!
[19:12] <AndyEsser> :)
[19:13] <mattbrejza> er, shouldnt those wires be green?
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[19:20] <AndyEsser> was told once to always use Buses not Wires in Kicad
[19:21] <Lunar_Lander> hello
[19:22] <AndyEsser> o/
[19:27] <Miek> AndyEsser: why?
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[19:29] <AndyEsser> It wasn't clarified, and for the life of me... I don't think I asked
[19:29] <AndyEsser> haha
[19:29] <Miek> tsk :p
[19:29] <AndyEsser> so... should switch to wires?
[19:30] <Miek> i don't know of any reason to always use buses instead of wires
[19:32] <AndyEsser> wires seem to be easier to use anyawy
[19:32] <AndyEsser> anyway*
[19:35] <AndyEsser> in kicad, is there just a generic 8-pin package or something?
[19:38] <Vaizki> I think you mean nets instead of wires in Eagle
[19:38] <Vaizki> and not buses instead of wires in Kicad .. :)
[19:38] <AndyEsser> o0o0 yes
[19:38] <AndyEsser> that might be it
[19:38] <AndyEsser> my bad
[19:38] <AndyEsser> :)
[19:38] Action: AndyEsser is dumb
[19:39] <Vaizki> well there's a lot to take in, I did my first board in Eagle with wires :D
[19:39] <Vaizki> and I thought well this is bloody awful
[19:40] <Vaizki> have not tried kicad. should try it.
[19:40] <AndyEsser> http://imgur.com/fP1JYUC
[19:40] <AndyEsser> power side is slowly coming together
[19:40] <Vaizki> I went to download kicad and all I could find out was fisticuffs on which nightly build crashes the least
[19:40] <Vaizki> so i went and downloaded Eagle
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[19:41] <mattbrejza> AndyEsser: if that usb connector is a mini/micro B, you should use a 5-pin connector
[19:41] <mattbrejza> otherwise itll go wrong when you tie it together with a footprint
[19:42] <AndyEsser> mattbrejza: for shield?
[19:42] <mattbrejza> no, usb mini/micro have 5 pins
[19:42] <mattbrejza> one is ID
[19:43] <AndyEsser> hmm
[19:43] <AndyEsser> am I able to just leave that pin disconnected?
[19:43] <AndyEsser> or is it one of these
[19:43] <AndyEsser> "Value of resistor determines type of device" things
[19:43] <AndyEsser> like on the Apple connectors
[19:43] <Vaizki> yes but when you layout the board, that part on the schematic needs to get a physical part tied to it
[19:44] <AndyEsser> Vaizki: yep, got that - just didn't realise that it had 5 pins :)
[19:44] <Vaizki> I don't think that schematic symbol has a mini/micro usb connector footprint to choose from
[19:44] <AndyEsser> o0o
[19:44] <AndyEsser> Kicad has a USB_OTG (mini/micro) connector
[19:44] <AndyEsser> I'll just use that
[19:46] <mattbrejza> the mcp1700 only needs 4u7 on its output btw
[19:46] <mattbrejza> and input for that matter
[19:46] <AndyEsser> mattbrejza: nice and smooth then?
[19:47] <AndyEsser> http://imgur.com/TJtJFup
[19:47] <AndyEsser> USB connector
[19:47] <Lunar_Lander> https://drive.google.com/file/d/0B1lke6hPHKJDUjBOUEZKVnNrN2M/view?usp=sharing almost done
[19:47] <AndyEsser> just leave id floating? or tie to earth?
[19:48] <AndyEsser> or.. shall I just google rather than bomb you all with questions
[19:48] <Lunar_Lander> I have ID floating on my mini-usb-b
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[19:48] <Lunar_Lander> worked so far
[19:49] <AndyEsser> google says: "Float, connect to ground, or connect to ground via resistor"
[19:49] <AndyEsser> I'll just tie it to ground
[19:49] <Lunar_Lander> I think I chose this when looking at sparkfun's FTDI basic
[19:49] <Lunar_Lander> sorry, that was nonsense
[19:50] <Lunar_Lander> but I think I saw another schematic somewhere
[19:51] <Lunar_Lander> https://cdn.sparkfun.com/datasheets/Dev/Arduino/Other/FTDI_SmartBasic_v11.pdf
[19:51] <Vaizki> when everyone copies the previous guy from github.. that's how standards get DONE.. :)
[19:51] <Lunar_Lander> :)
[19:51] <AndyEsser> Vaizki: heh
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[19:53] <AndyEsser> Any suggestions what I should use for my MCP73831 if it's not in the library?
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[19:53] <Lunar_Lander> you mean in eeschema?
[19:53] <AndyEsser> no, in kicad
[19:53] <Lunar_Lander> yeah, eeschema is the editor
[19:54] <Lunar_Lander> the schematic editor
[19:54] <AndyEsser> right
[19:54] <Lunar_Lander> you can open the symbol editor and then just draw a box and add all pins
[19:54] <AndyEsser> how do I open that?
[19:54] <Lunar_Lander> and then you got a schematic symbol with the pin assigments
[19:54] <AndyEsser> Footprint Editor?
[19:54] <Lunar_Lander> do you see the book with the pen in the top bar?
[19:54] <Lunar_Lander> no that is for the PCBä
[19:55] <Lunar_Lander> -a
[19:55] <Lunar_Lander> in the kicad main screen, the second button from the left
[19:55] <AndyEsser> Lunar_Lander: on which screen? whilst doing schematic or the 'main' screen
[19:55] <AndyEsser> ah gotcha
[19:55] <Lunar_Lander> both have it, but go into the main one
[19:55] <Lunar_Lander> one sec
[19:56] <Lunar_Lander> chris is quite helpful https://www.youtube.com/watch?v=oEkQ6qzXAb4&list=PLy2022BX6EsruY6XkqtgqJuaWdndFCE2Q&index=2
[19:56] <AndyEsser> thanks
[19:56] <Lunar_Lander> you're welcome
[20:00] <AndyEsser> hmm.. do I put a power switch on or not..
[20:00] <AndyEsser> just seems like something that could accidentally turn off during flight
[20:00] <fsphil> and has done in the past
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[20:02] <AndyEsser> hmm, well my own dumb fault if I leave it on and drain the battery when testing
[20:02] <AndyEsser> and that's what power led's are for ;)
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[20:14] <AndyEsser> great... created my new component
[20:14] <AndyEsser> doesn't bring all the pins with it
[20:14] <AndyEsser> helpful
[20:14] <AndyEsser> haha
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[20:15] <Lunar_Lander> oh
[20:16] <Lunar_Lander> the idea is when you draw your component, the pin assignments are already done, so later you just choose the right chassis in CvPCB
[20:17] <Lunar_Lander> for your MCP73831 for instance
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[20:17] <Lunar_Lander> hi mike
[20:17] <MikeUoN> hi ;)
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[20:19] <Lunar_Lander> https://drive.google.com/file/d/0B1lke6hPHKJDbVhSemo0OWNJaUk/view
[20:24] <AndyEsser> Lunar_Lander: yea, I copied a 555 and then renamed the pins
[20:24] <AndyEsser> but pin 1 and 8 decided to not bother coming in
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[20:26] <Lunar_Lander> oh ok
[20:32] <AndyEsser> http://imgur.com/j0VhMH1
[20:32] <AndyEsser> well this won't take long...
[20:35] <namor> hklo1 found with the help of a radio amateur. habhub prediction was spot on. thank you for help!
[20:36] <bertrik> wow, nice
[20:36] <Vaizki> good news & congrats
[20:36] <Lunar_Lander> yay
[20:36] <AndyEsser> :)
[20:36] <AndyEsser> nice namor
[20:38] <Rebounder> namor: congrats! :)
[20:38] <Vaizki> I'm sure you're happy about the Schengen area right now :)
[20:38] <Rebounder> hehe
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[20:42] <gurlavie> Guys, maybe you know of a ingenious way to automate predict.habhub.com query ?
[20:42] <Rebounder> the API is great
[20:42] <gurlavie> The problem is that in Israel, we can't launch most of the days
[20:42] <mattbrejza> http://predict.habhub.org/hourly/susf/ ?
[20:42] <gurlavie> mostly we have eastern wind, and the balloon will take to a different country
[20:42] <gurlavie> so can I automate the query to get an alarm when we are ok ?
[20:43] <Rebounder> gurlavie: via the API you can for example predict a daily launch time 7 days ahead
[20:43] <eroomde> gurlavie: ask for an hourley prediction lie mattbrejza offered
[20:44] <eroomde> like*
[20:44] <eroomde> then parse that to see what lands within a coordinate polygon of acceptable places in israel
[20:44] <eroomde> that will give you a week's warning
[20:45] <gurlavie> All great inputs ! Thanks !
[20:45] <gurlavie> So the week data is only via the API ?
[20:45] <eroomde> you could also fly a cutdown on your payload
[20:45] <Rebounder> gurlavie: nono, same basedate
[20:45] <eroomde> to detach from the balloon if the prediction is taking it too close to a border
[20:47] <gurlavie> Mattbrejza: How did you create the red routs ?
[20:47] <eroomde> go to #habhub and ask for an hourly prediction
[20:48] <gurlavie> are there some reliable/recommended "detaching" mechanisms ? we had here multiple fails...
[20:48] <eroomde> give you launch location, ascent rate, descent rate, and burst altitude
[20:48] <eroomde> you can then get an hourly set up like that - each dot is a landing spot for a launch every hour on the hour for the next 5 days, for your given flight information
[20:49] <eroomde> so you can see instantly a week's worth of landing spots
[20:49] <eroomde> detaching mechanisms - i like explosives
[20:49] <eroomde> some people use nichrome wire to melt through nylon string
[20:51] <gurlavie> The hourly method is amazing ! but
[20:51] <gurlavie> {feeling stupid} can't find the hourly option. I have "http://predict.habhub.org/" :(
[20:51] <eroomde> no, see above
[20:51] <eroomde> you must go to #habhub
[20:51] <eroomde> and ask for it to be set up for you
[20:51] <Rebounder> gurlavie: /join #habhub :)
[20:52] <eroomde> it is more computer-intensive so it is set up when people ask specirically
[20:52] <eroomde> rather than being automatic for anyone
[20:52] <eroomde> specifically*
[20:52] <gurlavie> Aaaa..... got it. sorry
[20:52] <eroomde> no problems
[20:56] <Ian_> eroomde re your picture of the standing desk earlier . . . that extra 12" clearance under the desk top will stop you banging your head if you wake up off your stripey matress too fast after lunch . . . dark curtains? The secret is out!
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[20:57] <eroomde> that's the dog's bed not mine
[20:57] <Ian_> Is that what is known as a cover story Ed?
[20:58] <Ian_> or are you regularly in the dog house?
[20:58] <Ian_> :)
[20:59] <Ian_> I found myself stood at a bank of teleprinter keyboards, many times, but at Maastricht several of them were just a little too tall for comfort - for me at least.
[21:00] <Ian_> afk sked having!
[21:08] <AndyEsser> right... MCP2221 on the schematic now
[21:08] <AndyEsser> time for the complicated stuff
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[21:30] <Ben-AstroSoc> got a toolbox for all our crap
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[21:33] Nick change: zyp_ -> zyp
[21:34] <AndyEsser> toolboxes are important
[21:37] <Ben-AstroSoc> it's pretty bear at the moment cos all our breadboarding crap is at uni
[21:37] <Ben-AstroSoc> bare
[21:38] <Ben-AstroSoc> gonna spend tomorrow tyring to get dl-fldigi listening to the signal
[21:39] <Ben-AstroSoc> once ive got that sorted i'll finish the datastring building
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[21:44] <AndyEsser> :)
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[21:53] <Ben-AstroSoc> suspect i haven't set up VB cable properly so gonna take another look at it
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[22:04] <AndyEsser> Ben-AstroSoc: it just creates an input device called VB CABLE Output and an output device called VB Cable Input
[22:04] <AndyEsser> SDR# just needs to set to VB Cable Input
[22:04] <AndyEsser> and dl-fldigi has VB Cable Output
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[22:04] <Ben-AstroSoc> right
[22:05] <Ben-AstroSoc> so SDR outputs to the mic VB cable input and dl-fldigi listens toe hspeaker/VBcable output
[22:05] Nick change: superkuh_ -> superkuh
[22:05] <AndyEsser> yes
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[22:07] <Ben-AstroSoc> right
[22:07] <Ben-AstroSoc> i'll check my setup in the morning
[22:07] <Ben-AstroSoc> dl-fldigi was displaying a waterfall but there was nothing on it other than a small amount of noise on the far left
[22:08] <AndyEsser> if that was the same time you showed us the screenshot of your SDR# then your bandwidth was set far too low
[22:08] <AndyEsser> you only had a red-line, there should be a grey-ish box that extends to the right of it the amount your bandwidth is set to
[22:09] <AndyEsser> that is then what creates the audio sounds you'd hear if it was routed to your speakers
[22:09] <Ben-AstroSoc> right
[22:09] <Ben-AstroSoc> i'll try fiddling with that
[22:10] <AndyEsser> give us a shout if/when you try it again
[22:11] <Ben-AstroSoc> will do
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[22:27] <Vaizki> so dl-fldigi only processes 4kHz of audio bandwidth if I remember correctly.. so set your USB filter to 5kHz or so in SDR#, no more is needed
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[22:45] <Vaizki> and it's time to turn in
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[22:47] <AndyEsser> likewise - time for me to head off
[22:47] <AndyEsser> got pretty much everything done in the circuit design except the GPS now
[22:48] <AndyEsser> http://imgur.com/7JxuBqU
[22:48] <Lunar_Lander> cool!
[22:48] <Lunar_Lander> well done
[22:49] <Laurenceb_> has anyone used the ublox CAM-8M ?
[22:52] <Upu> yeah
[22:53] <Upu> they are quite nice actually great performance considering
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[22:55] <Laurenceb_> ah cool
[22:55] Nick change: xfce -> Guest90162
[22:55] <Laurenceb_> did you make a PCB for it?
[22:56] <Laurenceb_> I'm just a little concerned about the layout guidelines, would like to see something that worked :D
[22:57] <Lunar_Lander> good night! :)
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[22:59] <mattbrejza> AndyEsser: id connect the vdd pin of the mcp charger directly to vcc from the usb socket rather than through the diode like you have it
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[23:01] <AndyEsser> mattbrejza: any particular reason? or just because of voltage drop?
[23:02] <mattbrejza> well the way you have it, when the usb is disconnected the charger vin will be powered from the battery through that diode
[23:02] <mattbrejza> it might get upset
[23:02] <mattbrejza> dunno without checking the datasheet though
[23:02] <Ben-AstroSoc> >bed at 11pm
[23:02] <Ben-AstroSoc> you scrubs ;)
[23:03] <mattbrejza> lunar is GMT+1 though
[23:03] <Ben-AstroSoc> i guess he's allowed
[23:03] <AndyEsser> mattbrejza: o yea, I guess so... having it the other side means the charging IC isn't powered unless there's external power :)
[23:04] <AndyEsser> no reason to have the IC powered if there's no external power... so good shout
[23:04] <AndyEsser> thanks
[23:05] <mattbrejza> np :)
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[23:08] <AndyEsser> any other pearls of wisdom :)
[23:08] <mattbrejza> nreset on the avr has a built in pullup
[23:09] <AndyEsser> o really?
[23:09] <AndyEsser> interesting
[23:09] <mattbrejza> i would suggest you check the datasheet but im reasonably sure about that
[23:09] <AndyEsser> how does that work with a reset switch then?
[23:10] <AndyEsser> if I push the reset switch, it'll short +v to GND
[23:10] <mattbrejza> well youll short v+ to gnd through a 50K resistor or whatever it is
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[23:12] <AndyEsser> datasheet doesn't seem to mention a pullup when that pin is RESET
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[23:15] <mattbrejza> pg477 has graphs of its value
[23:16] <AndyEsser> hmm, shall look at that
[23:17] <AndyEsser> still not sure how I'd wire that up properly without a pullup
[23:17] <mattbrejza> just pretent thte pullup rseistor you have there is inside the IC
[23:17] <AndyEsser> which then means you short +v to GND when I press the reset
[23:18] <Vaizki> well it won't change the situation with an external pullup.. :)
[23:18] <Vaizki> there's no way to disable the internal one
[23:19] <mattbrejza> reset is internally connected to vcc through a 50K resistor, so pressing the button wont short anything
[23:19] <AndyEsser> mattbrejza: so I connect the reset pin up to +v
[23:19] <AndyEsser> I then want to have a push-button switch to that takes it down to GND in order to trigger the reset
[23:20] <AndyEsser> I now have +v connected to the reset pin, and ground (via the push button)
[23:20] <mattbrejza> if you leave it unconnected then the IC will never reset
[23:20] <Vaizki> that sais, I seem to remember that a 4.7 or 10k pullup resistor is recommended if the environment is "harsh" in terms of electrical noise
[23:20] <mattbrejza> i was suggesting you delete the resistor rather than replacing it with a 0ohm
[23:20] <AndyEsser> ah
[23:20] <AndyEsser> so just have the pin->button->ground
[23:20] <mattbrejza> and the programmer yea
[23:20] <AndyEsser> no normal state up to +v
[23:20] <AndyEsser> 'normal'*
[23:20] <mattbrejza> nope
[23:20] <AndyEsser> gotcha
[23:21] <Vaizki> normally float
[23:21] <AndyEsser> right sorry, that makes sense now
[23:21] <mattbrejza> i still cant find the relevent datasheet section though
[23:21] <AndyEsser> I'm sure it didn't work for me on my breadboard unless I pull reset high
[23:21] <AndyEsser> and as Vaizki said - doesn't hurt to have the pullup :)
[23:22] <AndyEsser> Vaizki: I thought you were going to bed :)
[23:22] <Vaizki> I am in bed
[23:22] <mattbrejza> well no it wont hurt
[23:22] <Vaizki> my irc connection cut, reconnected and phone went beep beep beep with messages replayed from ZNC...
[23:23] <mattbrejza> pg48
[23:23] <AndyEsser> Ah yes
[23:24] <Ian_> That's the sort of bedtime reading you need Vaizki . . . gn :)
[23:26] <Vaizki> 50k seems like a a really weak pullup though
[23:27] <Vaizki> I guess it's to keep the current down
[23:27] <Vaizki> anyway, phone on silent & sleep :)
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[23:27] <mattbrejza> well the reason you have strong pullups is if you want decent speed out of a open-collector bus
[23:27] <mattbrejza> (one reason anyway)
[23:28] <Vaizki> yes to keep rise/fall times short
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[00:00] --- Fri Feb 19 2016