highaltitude.log.20140615

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[00:13] <snelly> wooohooo...first version of my Go HAB controller is sending valid APRS packets over KISS: https://github.com/chrissnell/GoBalloon/tree/master/ax25
[00:15] <Lunar_Lander> good night
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[03:30] <SgtBurned> Anyone still awake?
[03:32] <kc2pit> Ain't nobody here but us chickens.
[03:33] <myself> b'cawwk!
[03:43] <SgtBurned> Well
[03:43] <SgtBurned> I can see the sanity is still here.
[03:43] <SgtBurned> So what you two nutbags doing awake at 4:45 ?
[03:44] <kc2pit> Hanging around in GMT-4.
[03:44] <SgtBurned> :P
[03:47] <myself> discovering my Teensy3.1 literally in the couch cushions
[03:47] <myself> (...the hell, self?)
[03:48] <SgtBurned> The bored you wanted to play Hide and Seek
[03:48] <myself> 'parently.
[03:48] <SgtBurned> IN the couch cushion though... Thats just mental xD
[03:48] <kc2pit> Wow.
[03:49] <kc2pit> Have you messed with that much yet? I like the looks of 'em, and more importantly it looks like their creator likes porting libraries, but I have no idea how well those actually work.
[03:50] <myself> I haven't. Got it to do a keyboard thing and haven't found round tuits yet.
[03:51] <SgtBurned> Teensy 3.1 ?
[03:52] <myself> http://pjrc.com/store/teensy31.html
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[03:54] <SgtBurned> oooh nice
[03:54] <SgtBurned> I have a Nano right now
[03:54] <SgtBurned> Trying to get this 7Seg to work
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[04:20] <SgtBurned> I now have the logo "ATMEL" and "MEGA328P" burnt onto my leg now... War wound
[04:22] <SgtBurned> Smells liek pork... Yummy
[04:24] <kc2pit> Was that carelessness while soldering, or a discovery that VCC and GND go the other way around?
[04:27] <SgtBurned> Nah, Discovering China parts are a lot less tolerable than Taiwanese parts.
[04:27] <SgtBurned> 7seg had a short on one of the pins between cathode and the D segment
[04:27] <SgtBurned> Call number 8, Hmmm Porky
[04:29] <kc2pit> Mmm, fun.
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[04:37] <SgtBurned> Hooked up Power, 4x4 Keypad to 7seg, Now displays numbers :) With the Patented Shitty Header Fix (tm)
[04:50] <SgtBurned> Fried the 5v line on my Nano... Silly Chinese workers
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[05:45] <ProSpectre> Mornin
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[06:54] <ProSpectre> everybody still asleep?
[06:58] <arko> just about to sleep :)
[06:59] <Upu> just about to wake
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[07:03] <ProSpectre> both. finaly? :D
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[07:21] <SP3OSJ> #habhub
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[07:38] <craag> Willdude123: Looks like the storm might have knocked the wifi antennas out of whack - may be fixed later today.
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[08:33] <malgar> launches today?
[08:34] <LeoBodnar> sup?
[08:35] <LeoBodnar> aadamson i spy some srange things in your telemtry
[08:35] <LeoBodnar> your LiPo voltage reading saturates at 4.138v
[08:36] <LeoBodnar> since you are running on magic for 4 hours after charging has stopped
[08:37] <LeoBodnar> also you have 0.128v solar voltage in the middle of the night
[08:50] <snelly> howdy
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[10:15] <S_Mark> Nichrome wire for cutdown - how to attach to normal signal wire? Cant solder, screwblock terminal? Also thoughts on using nichrome as a cutdown generally..
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[10:17] <SpeedEvil> Crimp connector is the proper way.
[10:17] <SpeedEvil> Screw block works fine
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[10:19] <S_Mark> Yeah tried crimp but wire too thing, screwblock I think I'l go for
[10:19] <S_Mark> thin*
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[10:30] <Geoff-G8DHE-M> Looks like uX3 might be flying with BUSEDS1 do we have any details on freq ?
[10:31] <Geoff-G8DHE-M> RocketBoy ?
[10:32] <Upu> 434.075MHz. I will also be loaning a backup XABEN tracker on 434.250MHz
[10:33] <Geoff-G8DHE-M> Ah right 434.250
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[10:43] <mikestir> that's good timing - I can test my new rig :)
[10:48] <G6SUQ_Graham> I'm not getting bearing/distance display in my FLDIGI
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[10:49] <Geoff-G8DHE-M> UX3 doesn't have a flight document
[10:49] <G6SUQ_Graham> Ah, okay
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[10:55] <Neil_M0CJM> morning all
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[11:00] <Neil_M0CJM> All very quiet in here today
[11:00] <Geoff-G8DHE-M> Looking for these 2 balloons at the mo, not seeing them yet odd ....
[11:01] <aadamson> LeoBodnar_, yes I know about both of those issues... I didn't have the right voltage divider resistors so I just used 2 47k ohm resistors to create a 2:1 divider, however that limits the voltage range to 4.138v max reading, I'll fix that in my next hardware.
[11:03] <aadamson> LeoBodnar_, second, I used a load switch that I could turn on and off on all my ADC circuits - since been removed in the latest hardware, it has a pull up on one of the FET's to the voltage that it's sampling, the problem however where there isn't any voltage is that the pullup does nothing as as a result, it messes up the low voltage reading and on these test flights I don't zero it when I know it's low
[11:04] <aadamson> both the above have been fixed in the latest hardware (removed the load switch and bought the right resistors :))
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[11:09] <tweetBot> @HABSupplies: New GPS antenna good replacement for the now extinct Sarantels : http://t.co/pdpFPvNIn2 #ukhas
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[11:10] <g0hww> hi. what are the RTTY modem settings for the HAB I'm seeing on 434.2497MHz centre?
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[11:11] <G6SUQ_Graham> g0hww: it's 50 baud, 450 shift, 7N2
[11:11] <Geoff-G8DHE-M> 50baud 470Hz shift probably 7 bit
[11:11] <g0hww> thanks Geoff-G8DHE
[11:12] <g0hww> and G6SUQ_Graham
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[11:29] <Neil_M0CJM> Anu idea what the solid blue lines are going directly west from the balloon track?
[11:29] <Geoff-G8DHE-M> just a rogue GPS position
[11:29] <Geoff-G8DHE-M> or two
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[11:37] <PE2G> DutchMillbt: Any reception yet?
[11:38] <DutchMillbt> PE2G Yes but the signal is too weak ...no greens yet
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[11:39] <PE2G> Thanks for the info
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[11:46] <Geoff-G8DHE-M> signals are both very weak for me, not got a solid copy at all so far.
[11:46] <G8APZ> Can someone confirm if uX3 is RTTY 50/450 7N 2 stop bits?
[11:46] <Geoff-G8DHE-M> yes
[11:46] <Geoff-G8DHE-M> 470Hz
[11:46] <Maxell> Geoff-G8DHE-M: they are weak for you?
[11:46] <Maxell> They are weak for us at the horizon!!1
[11:46] <G8APZ> partials here on uX3 but it is stronger than BUSED
[11:47] <Geoff-G8DHE-M> strange yes, trouble is I'm VNCing in, only see the signals on the co-linear, but would have expected much stonger signals
[11:47] <Maxell> more like non exsistent: all I dedoced so far was uX3;BUSEDS1
[11:47] <Maxell> uh
[11:47] <Maxell> *,-1801,,
[11:47] <Maxell> :P
[11:48] <Geoff-G8DHE-M> I would normally expect 25+dB snr but running around 7-10dB
[11:48] <Geoff-G8DHE-M> uX3 is better of the two
[11:49] <G8APZ> sigs very poor here considering the height of the flight
[11:49] <G8APZ> perhaps the antennas are not as good as Leo's!
[11:50] <DutchMillbt> Morning Maxell the signal is fading all the time... ducting isn't always a frend ;-)
[11:53] <DutchMillbt> first uX3 green
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[11:58] <DutchMillbt> PE2G something @ 434.250 yet ?
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[12:03] <PE2G> DutchMillbt: Haven't tried 250 yet. Traces now on 075
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[12:03] <Maxell> DutchMillbt: "$$BUSADS1,16617,12:02;14,0.000000,0&00000,0,0,2147483647.2147683647,13.9,Y\Uffffffff,209,131,0.2*415C"
[12:04] <Maxell> DutchMillbt: only partials here
[12:05] <Maxell> DutchMillbt: I got a tegelvoet! I still need a piece of pipe and some U-clamps to mount the pipe on the tegelvoet and then I'm all set
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[12:05] <DutchMillbt> Yep here too all strings bad..
[12:06] <Maxell> uX3 seems to be stronger yes
[12:06] <Maxell> instant greens
[12:06] <Maxell> and another one
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[12:10] <DutchMillbt> Maxell don't forget small rubber mat for protection : http://www.aluminiumshop.nl/aluminium/solar/solar-bevestigingsmateriaal?p=3
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[12:12] <Maxell> DutchMillbt: I have similair for my subwoofers, but I think I will use http://www.speelkledenwinkel.nl/media/catalog/product/cache/5/image/9df78eab33525d08d6e5fb8d27136e95/r/u/rubber-buitenmat-domino.jpg for the tegelvoet.
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[12:15] <DutchMillbt> Maxell the shop has cheap alu pipes too : http://www.aluminiumshop.nl/aluminium/ronde-buis-6060#.U52Nm3ZpTcs
[12:15] <PaulCDR> Good afternoon folks, can someone help me with a bit of arduino code. im getting a real weird bug when inputting the number of satellites into my transmitted string
[12:16] <PaulCDR> when using spritf and pass in the number of sats, i get a 5 digit number
[12:16] <PaulCDR> sprintf(buffer, "$$%s,%u,%.2ld:%.2ld:%.2ld,%s,%s,%ld,%.2u\0", callsign, ticks, gps.hour, gps.minute, gps.second, gps.lat, gps.lon, gps.alt, gps.sat);
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[12:17] <PaulCDR> gives me this, note the last section of 47626 when i have 0 for sats. this is also the case when i have a sat lock, just a different last section $$PaulCD,30,00:00:00,-00.00000,-00.00000,0,47626
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[12:19] <PaulCDR> im clearly doing something stupic
[12:21] <mauhen> What is the baud rate for UX3?
[12:22] <Geoff-G8DHE-M> 50baud 470hz shift
[12:23] <mauhen> Ta
[12:23] <Geoff-G8DHE-M> PaulCDR, what type was defined for the variables ?
[12:23] <aadamson> PaulCDR, hard to tell without looking at the code, but I think you need to check your entire "format string"... some of your values look a little odd, - http://www.tutorialspoint.com/c_standard_library/c_function_sprintf.htm
[12:23] <Geoff-G8DHE-M> The arduino sprintf is also limited I believe
[12:24] <aadamson> PaulCDR, make sure that the type you are trying to print matches the type you are using in your format string
[12:24] <PaulCDR> its an int Geoff
[12:24] <fsphil> you don't need \0
[12:25] <fsphil> but that's not your bug
[12:25] <aadamson> PaulCDR, is your lat/lon also ints?
[12:25] <fsphil> how large is buffer[] ?
[12:25] <PaulCDR> yeah phil, i have tried removing that already
[12:25] <PaulCDR> the buffer is 200
[12:25] <fsphil> not that then
[12:26] <G8APZ> BUSEDS1 sig very poor here even at 30km... I see the flight is on its way down anyhow... I must have a poor angle to horizon to the west. :-(
[12:26] <PaulCDR> i print the sat before the sprintf and i get 0 as expected
[12:26] <fsphil> try just printing it with %d
[12:27] <fsphil> %.2u doesn't seem to make sense, .2 is saying to print two decimal places
[12:27] <fsphil> but it's an integer
[12:27] <MightyMik-WD8MNV> yes... ux3 has popped
[12:27] <fsphil> same for the other .2's
[12:28] <fsphil> ah .2 means something else for integers
[12:28] <fsphil> I didn't know that
[12:28] <PaulCDR> does .2 not print a min of 2 digits
[12:28] <aadamson> was about to type that ^
[12:28] <fsphil> yea
[12:28] <PaulCDR> the others are for the time
[12:28] <fsphil> weird. normally I'd just use %02d
[12:28] <aadamson> me too ^
[12:28] <fsphil> worth trying that
[12:28] <daveake-tab> Ditto
[12:29] <fsphil> as someone mentioned the avr libc is a bit limited
[12:29] <daveake-tab> But the error well be int vs long
[12:29] <fsphil> it might not handle that format
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[12:30] <PaulCDR> i think i tried %d and it gave something weird too, but ill try it again
[12:30] <fsphil> yea probably a type mismatch
[12:31] <PaulCDR> the weird thing is that it worked no problem last yeah before we packed up for the winter
[12:31] <fsphil> probably a chance in the libraries
[12:31] <fsphil> change*
[12:31] <aadamson> you can also rule out which variable it is, just replace the gps.sats with a 12 or 10 or some decimal number as the value used in the string
[12:31] <aadamson> see if that prints what you pass to it
[12:31] <fsphil> your using long int for the gps time fields
[12:31] <fsphil> that seems odd
[12:32] <fsphil> the rest look fine
[12:32] <fsphil> make sure altitude is long int
[12:33] <fsphil> or if it's unsigned int, use %u there
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[12:33] <fsphil> (don't use int unless you don't plan on going over 32768m :)
[12:33] <PaulCDR> yeah, when i use %d i get -17910 this time
[12:34] <PaulCDR> add that to the orig value and you get 65536
[12:34] <daveake-tab> The issue will be earlier
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[12:34] <PaulCDR> im using an unsigned int
[12:34] <PaulCDR> for alt
[12:34] <daveake-tab> The parameters and format strings don't line up because of a type mismatch
[12:35] <fsphil> you're using %ld to print it
[12:35] <fsphil> which is a 32-bit value
[12:35] <fsphil> er, or is it
[12:35] <aadamson> it will depend on the compiler
[12:35] <fsphil> int on an avr is 16 bit isn't it?
[12:35] <daveake-tab> Yes
[12:35] <mattbrejza> uint8_t, uint16_t etc ftw
[12:35] <aadamson> yeah
[12:35] <fsphil> I wish that was standard mattbrejza
[12:35] <daveake-tab> Yes
[12:36] <aadamson> you have to be careful with just int
[12:36] <aadamson> the compiler may optimize it
[12:36] <PaulCDR> ill need to use %u then wont i
[12:36] <mattbrejza> i thought it worked on pretty much everything
[12:36] <mattbrejza> also that doesnt help with %i etc
[12:36] <fsphil> PaulCDR: change the altitude bit to %u
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[12:36] <aadamson> the uint_x's is a perferred standard
[12:37] <fsphil> oh there was a uk flight today, missed that
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[12:40] <ak4rp>
[12:40] <ak4rp> q
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[12:42] <PaulCDR> aadamson, i done as you suggested and swapped out the gps.sat for 10 and it printed correctly, problem must be with gps.sat
[12:42] <fsphil> not true
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[12:43] <fsphil> sprintf will do what it's doing if the string format types don't match what's provided
[12:43] <aadamson> PaulCDR, I think as fsphil suggested, there is a type mismatch somewhere and it's either with gps.sat or before it
[12:43] <fsphil> it's likely altitude
[12:43] <fsphil> as %ld is a long int, and you're giving it an unsigned int
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[12:44] <fsphil> it would be nice of the compiler give a warning about it
[12:44] <fsphil> though I suppose it's a library thing, not a job for the compiler
[12:45] <PaulCDR> i have changed the alt to %u as its being passed a long as you suggested.
[12:45] <fsphil> you said it was an unsigned int?
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[12:46] <PaulCDR> sorry an unsigned int
[12:46] <aadamson> yeah I'm confused now too ^
[12:46] <fsphil> C types are so confusing :)
[12:46] <fsphil> then that's ok
[12:46] <PaulCDR> sorry about that
[12:46] <fsphil> did it help?
[12:46] <PaulCDR> the alt prints fine anyway, but might have freaked out when it got high enough,
[12:47] <fsphil> it might have printed fine but the values after it might not have
[12:47] <PaulCDR> ahh
[12:47] <aadamson> if alt is a long, then you "%ld" if it's an int, the use "%d", if it's an unsigned int, then use a "%u"
[12:47] <fsphil> if you told it there was 32-bits it would have skipped ahead two extra bytes
[12:47] <PaulCDR> its a 1 not an l
[12:48] <PaulCDR> emm, funny how stands out now in a different fone
[12:48] <PaulCDR> font
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[12:49] <aadamson> also, you removed the \0 from the end yes?
[12:49] <aadamson> you don't need it
[12:49] <fsphil> that's pretty harmless anyway
[12:49] <aadamson> unless you are an arduino library - the you never know :)
[12:49] <PaulCDR> it denotes the end of the string right?
[12:49] <fsphil> even arduino should get that bit right
[12:49] <fsphil> yea
[12:49] <aadamson> hehe ^
[12:49] <fsphil> but C strings append an \0 automatically
[12:50] <fsphil> "hello" is stored in memory as hello\0
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[12:50] <fsphil> "hello\0" would be hello\0\0 .. harmless bit a waste of a perfectly good byte :)
[12:50] <fsphil> but*
[12:51] <fsphil> has any of this helped?
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[12:51] <PaulCDR> the alt bit is helpful and has prob averted an issue at high alt
[12:51] <PaulCDR> when i capture the sats from the gps i get 00
[12:52] <PaulCDR> i then convert that to an int using atoi(sats)
[12:52] <PaulCDR> this prints 0
[12:52] <fsphil> is it still printing the large number from sprintf?
[12:53] <PaulCDR> yeah,
[12:53] <PaulCDR> do i need to convert it to an int at all
[12:53] <PaulCDR> can i just sprintf the original 00
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[12:53] <fsphil> you could, though I'd like to understand the bug incase there is something else there
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[12:54] <PaulCDR> yeah me too tbh
[12:54] <fsphil> can you print your current sprintf() and your variable declerations?
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[12:56] <PaulCDR> sprintf(buffer, "$$%s,%u,%.2ld:%.2ld:%.2ld,%s,%s,%u,%d\0", callsign, ticks, gps.hour, gps.minute, gps.second, gps.lat, gps.lon, gps.alt, 10);
[12:57] <PaulCDR> this is printing 10 as expected
[12:57] <PaulCDR> alt prints 0 as expected
[12:57] <aadamson> are hour, minute and second all longs?
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[12:58] <PaulCDR> yes, longs
[12:59] <fsphil> you could get away with char's for them :)
[12:59] <fsphil> but as long as they match it'll do
[12:59] <fsphil> what happens when you put your sat number back in now?
[13:00] <fsphil> can you print how your gps struct is declared
[13:00] <aadamson> yeah at some point, you can probably save a bunch of ram by looking at how you are using variables, but fsphil is right, that's not the issue right now
[13:00] <fsphil> or are you using tinygps?
[13:00] <PaulCDR> ublox
[13:00] <PaulCDR> ill try using gps.sat now
[13:01] <fsphil> the tinygps ardino library I mean
[13:02] <fsphil> n/m, you're not or you wouldn't be using atoi()
[13:02] <PaulCDR> im not using any arduino gps lib
[13:02] <PaulCDR> should i be
[13:03] <fsphil> debateable
[13:03] <fsphil> -e
[13:03] <fsphil> you're this far so probably no point
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[13:06] <PaulCDR> looks a lot better now, im getting a 0 again
[13:07] <fsphil> nice
[13:07] <PaulCDR> must have been the alt mixup
[13:07] <fsphil> it's never where you expect it
[13:07] <fsphil> http://ukhas.org.uk/guides:common_coding_errors_payload_testing
[13:07] <fsphil> worth testing against these ^^
[13:07] <PaulCDR> i would have never figured that out, thanks very much guys
[13:07] <fsphil> when are you launching PaulCDR?
[13:07] <fsphil> I don't think I'm that far from you
[13:08] <PaulCDR> no, i think i chatted to you last year, you are up in cookstown direction right?
[13:08] <fsphil> that's right
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[13:08] <LeoBodnar> random jumps in plane and altitude, i can see you are still using sleep mode aadamson ?
[13:08] <PaulCDR> cool, i see you on the tracking map sometimes
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[13:09] <fsphil> shout if you want a hand tracking or chasing it
[13:09] <PaulCDR> yeah cheers, we were planning to go this weekend, but a problem came up with the He
[13:09] <PaulCDR> its a good job as the tracker was not quite there after all
[13:10] <fsphil> shame, nice weather for it
[13:10] <PaulCDR> yeah i know, its a great day and ive my head on the computer as normal lol
[13:10] <aadamson> LeoBodnar, I don't know what exactly is going on... when I lose lock I stay awake until I get it back again, but in some cases that is taking up to 2 minutes or more... very strange what is going on right now.... I know I have one problem with where I have to mount the
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[13:11] <PaulCDR> Im going to put the tracker out side to get a lock and get onto the map
[13:11] <aadamson> solar controller on this rev of hardware and it seems when it's charging it interferes more with the gps, than when the lipo is charged
[13:11] <fsphil> what frequency are you on PaulCDR?
[13:11] <LeoBodnar> i know what is going on
[13:11] <aadamson> so that may have something to do with it
[13:11] <aadamson> ?
[13:11] <PaulCDR> 434.65
[13:11] <LeoBodnar> you ignored my advice of never using sleep mode
[13:11] <fsphil> probably can't hear it, but worth a try
[13:11] <aadamson> sleep on the gps?
[13:11] <PaulCDR> yeah, sure why not
[13:12] <aadamson> you mean shutting off it's power and just leaving it backup powered?
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[13:14] <aadamson> LeoBodnar, which are we talking as there can be 3... a) turning off the gps power while keeping back up power; b) using the default power saving mode; c) using the sleep power saving mode
[13:14] <aadamson> I don't do C)
[13:14] <aadamson> I do do A,B
[13:15] <LeoBodnar> A || B == trouble
[13:15] <LeoBodnar> A || C == trouble
[13:15] <LeoBodnar> B is ok
[13:15] <aadamson> interesting
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[13:15] <aadamson> I dynamically switch in and out of PSM based upon sat count/lock
[13:16] <LeoBodnar> whatever, i have told you once
[13:16] <LeoBodnar> few moons ago
[13:16] <aadamson> and I shut off the power if locked and sats > some number *after* I beacon the last time in the 2 min interval
[13:16] <LeoBodnar> but you know better
[13:16] <aadamson> but *now* I know better :)
[13:17] <LeoBodnar> Upu was going to get UBLOX on the case
[13:17] <aadamson> yeah that would be good, I wonder what it is... he's called it an *artifact*
[13:17] <aadamson> but I don't know what that means
[13:18] <LeoBodnar> artefact?
[13:18] <LeoBodnar> is a screwup for technical reasons
[13:18] <aadamson> hehe ^ is it a bug or a feature lol
[13:19] <LeoBodnar> shit software inside UBLOX
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[13:19] <LeoBodnar> because users should not turn it off
[13:19] <aadamson> indeed
[13:19] <LeoBodnar> they should stay "connected" and "traceable"
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[13:22] <PaulCDR> Happy days, getting an accurate upload to the maps.
[13:23] <fsphil> sweet
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[13:24] <PaulCDR> thanks again for everyones input there, it was a big help
[13:25] <PaulCDR> whats the general thoughts on receivers. SDR or a proper Radio
[13:25] <fsphil> proper if you have one, but SDR's are fine too
[13:26] <PaulCDR> i started off with an sdr with the dongle and filter but its a bit much. bought a yupiter last week, its far hander,
[13:27] <PaulCDR> i downloaded the tracker app for my android tablet, but havent tested it yet
[13:27] <PaulCDR> *handier
[13:27] <Geoff-G8DHE-M> a proper radio helps whenngles seem fine, poissbly better in some situations. DFing, but for general trackin then D
[13:27] <Geoff-G8DHE-M> Duh that got confused!
[13:28] <fsphil> the higher end SDRs are as good as dedicated receivers
[13:28] <Geoff-G8DHE-M> A proper radio for DFing, but otherwise Dongles can sometimes be better for general tracking
[13:28] <fsphil> but the software can sometimes be a weekness
[13:28] <fsphil> weakness*
[13:28] <fsphil> as is my spelling today
[13:29] <PaulCDR> i found it a bit tricky getting the sig from the sdr to the fldigi, it worked grand when i got it going, but the radio stright into the mic socket and away you go
[13:29] <fsphil> yea agreed
[13:30] <fsphil> I've got an ft817 and there are a few more wires to connect than just audio
[13:30] <fsphil> but once it's going it all works really well
[13:30] <fsphil> dl-fldigi can even retune the radio automatically
[13:30] <aadamson> Thanks again LeoBodnar!
[13:30] <PaulCDR> it works well until what has just happened to me, batteries die lol
[13:30] <fsphil> hah
[13:30] <fsphil> get a car charger
[13:31] <fsphil> I power mine from the car, and keep a 12V battery just in case
[13:31] <fsphil> and a car laptop PSU is very handy
[13:31] <PaulCDR> yeah, just starting to think about that now lol.
[13:32] <fsphil> if I had one other bit of advice, bring a long pole and wellies
[13:32] <Geoff-G8DHE-M> Agreed Maplin do a good one with the aircraft plug as well, infact I'm looking for some aircraft type sockets to use in the vehicle as well
[13:33] <PaulCDR> one of the other guy is a nimble young guy, he can climb the trees if needs be,
[13:33] <fsphil> ah then you're sorted
[13:33] <fsphil> trees are no fun
[13:34] <PaulCDR> im not built for trees myself
[13:34] <fsphil> took me three weekends to get one out of a tree
[13:34] <PaulCDR> cut the tree down in the end??
[13:34] <fsphil> wasn't so much the tree, just that the tree was in a forest on a mountain surrounded by a bog
[13:34] <fsphil> I was sooo tempted
[13:34] <fsphil> managed to cut the cord on the third attempt
[13:35] <fsphil> but I did have a saw in the boot
[13:35] <fsphil> plan B
[13:35] <PaulCDR> sounds like fun
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[13:36] <PaulCDR> so i need a 12v inverter for the car then
[13:36] <fsphil> we described it in other terms :)
[13:36] <fsphil> yea
[13:36] <fsphil> you don't want to run out of power
[13:37] <PaulCDR> other terms, i can imagine
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[13:37] <fsphil> could have been worse
[13:37] <fsphil> we where quite near a much larger forest
[13:39] <PaulCDR> something like this would be ok?? http://www.amazon.co.uk/BESTEK-BEST-SELLING-INVERTER-Inverter-MRI3013BU/dp/B009NQW8D4/ref=sr_1_1?s=electronics&ie=UTF8&qid=1402839490&sr=1-1&keywords=car+inverter
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[13:40] <fsphil> looks fine
[13:42] <PaulCDR> whats the story if the balloon crosses the border phil
[13:43] <fsphil> the guy from the IAA told me they'd like to be told, but it's not required
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[13:44] <PaulCDR> we shouldnt cause an international incident then
[13:45] <fsphil> it hasn't happened yet...
[13:45] <fsphil> and one of the pico flights flew over north korea not so long ago
[13:47] <PaulCDR> well if that didnt spark off some war then im probably fine
[13:47] <PaulCDR> i suppose its not like the south can scramble their air force
[13:48] <fsphil> hah
[13:49] <PaulCDR> dinner is calling, talk to you all later
[13:50] <fsphil> good idea. need to get outside an enjoy this brief summer
[13:50] <fsphil> laters
[13:50] <PaulCDR> yeah, we might get a few days this yer
[13:50] <PaulCDR> year
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[14:18] <Laurenceb> SEDS are flying?
[14:18] <Laurenceb> hi RocketBoy
[14:19] <mattbrejza> landed
[14:19] <Laurenceb> ah
[14:20] <Laurenceb> i wonder what happened with their rockoon project
[14:20] <Laurenceb> im guessing nothing
[14:20] <Laurenceb> would be typical for SEDS
[14:24] <mattbrejza> a SEDS actually doing a successful balloon launch is a good start
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[14:27] <Laurenceb> trolol
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[14:29] <Laurenceb> has anyone here had issues with GoPro cameras freezing?
[14:29] Nick change: SiC- -> sic
[14:29] <Laurenceb> im planning a launch that will involve a very cold GoPro - unused for almost all the flight
[14:36] <Maxell> \o/ 50 meters of aircell 7
[14:36] <Maxell> \o/ dutchmillbt
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[14:45] <tweetBot> @BoltonSchTech: #BoltonSchoolinSpace fantastic edited video of the trip to space, and back https://t.co/z2KgVrjjyo
[14:45] <tweetBot> #UKHAS
[14:47] <tweetBot> @BoltonSchTech: #BoltonSchoolinSpace and here's the full length video, if you've got 2.5 hours to spare...
[14:47] <tweetBot> https://t.co/2BXeBU8PVx
[14:47] <tweetBot> #BSIS
[14:47] <tweetBot> #UKHAS
[14:49] <fsphil> #notspace
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[14:57] <ibanezmatt13> Laurenceb, this GoPro https://flic.kr/p/mABRVF froze on the way down, we thought it had more chance of overheating
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[15:20] <Maxell> Intresting to see that almost all Polish digipeaters have an internet igate running too.
[15:20] <Maxell> General igate coverage also seems to be better
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[15:23] <Laurenceb> ibanezmatt13: so it was running all the time?
[15:24] <Laurenceb> is that a GoPro 2?
[15:25] <Laurenceb> i wonder if the battery got too cold and it lost power perhaps?
[15:25] <Laurenceb> i was going to power it externally
[15:27] <ibanezmatt13> it was running 0.5s timelapse all the time
[15:27] <Laurenceb> ok
[15:27] <Laurenceb> any idea how it died?
[15:28] <ibanezmatt13> yeah that's possible. Started getting the odd image with purple lines on as it got colder, and they became more frequent
[15:28] <Laurenceb> could it have been the battery?
[15:28] <Laurenceb> hmm
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[15:28] <Laurenceb> that doesnt sound like the battery to me
[15:28] <ibanezmatt13> yeah I suppose, it packed up completely at -25C
[15:28] <Laurenceb> it should power down automatically
[15:28] <Laurenceb> unless the battery ESR increased, so it was intermittently losing power
[15:29] <Laurenceb> -25 is about the temperature you would expect the battery to fail at
[15:29] <ibanezmatt13> that might be what it did. Started getting purple images on way up, then they stopped, then on the way down it went for good, and the temp graph suggests it was suffering a bit. I think it probably was the battery in the end
[15:29] <Laurenceb> ok
[15:29] <Laurenceb> were you running a script on it?>
[15:30] <ibanezmatt13> just a standard timelapse one. I didn't set it up so not sure, but think it was pretty reliable
[15:30] <Laurenceb> i ve been trying to work out if there is a way to record video and framegrabs as jpegs simultaneously
[15:30] <Laurenceb> ok
[15:30] <ibanezmatt13> not sure, only messed with CHDK
[15:30] <ibanezmatt13> ah tea, bbs
[15:30] <Laurenceb> yeah me too
[15:30] <Laurenceb> cya
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[15:41] <Laurenceb> is there some way to link figures in latex so that they float together?
[15:42] <Laurenceb> i can put everything in one big figure, but then it cant span multiple pages
[15:42] <Maxell> 7297 m burst for SR0FLY. No float :(
[15:42] <Laurenceb> i have a thousand or so figures that i want to be able to float
[15:42] <Maxell> Or "yay no float" :)
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[15:55] <SpeedEvil> Laurenceb: lol.
[15:55] <SpeedEvil> I was for a moment thinking you meant an array of balloons.
[15:56] <SpeedEvil> Made from latex
[16:07] <Laurenceb> i think i need an invisible subsection
[16:08] <Laurenceb> perhaps...
[16:11] <ibanezmatt13> latex is great for cutting down from latex too: http://nbviewer.ipython.org/gist/ibanezmatt13/e72e43feca4a50d3905f
[16:11] <ibanezmatt13> for calculating length of nicrome wire for cutdown ^ :)
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[16:14] <Laurenceb> nice
[16:15] <ibanezmatt13> probably waay overkill, but was nice to see a quadratic at the end :)
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[16:28] <Laurenceb> is SP3OSJ-12 running a repeater?
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[16:31] <Willdude123> Did anyone here come to the nadars rally today?
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[16:51] <DL7AD> hi
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[17:53] <tbbelg> hello everybody
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[17:54] <Lunar_LanderA> hello tbbelg
[17:54] <Lunar_LanderA> what a match
[17:54] <Lunar_LanderA> Switzerland wins 20 seconds before the end
[17:54] <tbbelg> cool
[17:54] <Lunar_LanderA> yeah
[17:54] <tbbelg> I didin't saw
[17:54] <Lunar_LanderA> ah
[17:54] <Lunar_LanderA> I only by accident
[17:54] <tbbelg> :-)
[17:55] <tbbelg> I was in family
[17:56] <Lunar_LanderA> :) nice
[17:56] <Lunar_LanderA> how was your day?
[17:56] <tbbelg> very good
[17:57] <Lunar_LanderA> nice
[17:57] <Lunar_LanderA> same here, short headache in the afternoon but it went
[17:57] <tbbelg> I'm trying to display balloon's data on spacenear.us
[17:57] <tbbelg> but fails
[17:57] <Lunar_LanderA> hm
[17:58] <Lunar_LanderA> did you submit that flight document thing to habhub?
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[17:59] <tbbelg> yes i create it. All data seem uploading but i see : "_fix_invalid": true,
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[17:59] <tbbelg> in the log
[17:59] <Lunar_LanderA> hm
[17:59] <Lunar_LanderA> strange
[18:00] <tbbelg> yea
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[18:01] <tbbelg> 6 to 8 satellites detect so fix should be true
[18:01] <Lunar_LanderA> don't have an idea at the moment what that could mean
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[18:01] <Lunar_LanderA> sorry
[18:02] <tbbelg> that's ok :-)
[18:04] <Lunar_LanderA> :)
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[18:07] <ak4rp> hi, is SP3OSJs repeater operational?
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[18:56] <Lunar_LanderA> hi malgar
[18:56] <Lunar_LanderA> how did you like the match last night?
[19:02] <Upu> I cleaned your track up aadamson
[19:05] <aadamson> Upu, - thanks, I was wondering if I could do that... I put some code in my script to avoid some of it and had a good conv
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[19:06] <aadamson> with LeoBodnar this morning (my time) about what I'll do from here forward... Beat up on those ublox guys would ya, they need to fix this issue - the one you and I had a while back - I'm not converted :)
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[19:07] <Upu> Can't replicate it in ucenter
[19:07] <Upu> or I would
[19:07] <aadamson> so I've been kinda watching and looking at it today.
[19:07] <Upu> afk
[19:08] <aadamson> it's very strange, I can go from 10 sats for a number of posits to zero sats
[19:08] <aadamson> and then back to 7 or 8 almost that quickly
[19:08] <aadamson> I turn on the gps 30 seconds before I use it and that isn't enough time as has now been proven by me too.
[19:08] <aadamson> so for now, I guess I'll leave it on all the time and just us PSM
[19:09] <aadamson> sucks to have to do that.
[19:09] <aadamson> one other data point, in pedestrian mode - I've never seen this issue, it seems to be worse in airborne
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[19:10] <aadamson> I can leave it in my backyard for days and never have a bad posit, but with the movement of flight and it being in airborne it seems they are there
[19:10] <aadamson> ^ I'm *now* (was not) converted...
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[19:12] <aadamson> anyway, thanks for the clean up
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[19:46] <malgar> Lunar_LanderA: sure.. and I'm still watching the replay of Pirlo free kick :P
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[19:49] <Lunar_LanderA> :)
[19:50] <Lunar_LanderA> France scored
[19:50] <Lunar_LanderA> wow
[19:50] <Lunar_LanderA> missed it
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[19:54] <MARSBalloon> Evening
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[19:55] <Upu> evening
[19:57] <MARSBalloon> Hi there, I am just setting up a payload doc for a launch next week
[19:57] <Upu> ok
[19:57] <Upu> is the payload transmitting ?
[19:57] <MARSBalloon> not at the moment
[19:57] <Upu> ok
[19:58] <MARSBalloon> how long does it usually take to get approved for the system?
[19:58] <Upu> quick
[19:58] <Upu> if one of us is about
[19:58] <Upu> but what I'd ask is you make a payload doc (if you haven't already)
[19:58] <Upu> and test it let see the payload the map
[19:58] <MARSBalloon> sure, I am writing it now
[19:58] <Upu> then make a flight document and we can approve that
[19:59] <Upu> approving fixes everything and stops the payload doc over writing and some other stuff
[19:59] <Upu> and is a pain to fix things if they are wrong
[19:59] <Upu> so prefer to check it all first
[19:59] <MARSBalloon> great thanks
[19:59] <Upu> there are a number of us who can approve flight docs either ask here or on #habhub
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[20:00] <MARSBalloon> is there a preferred shift? I am using 350 but I wonder if that is too small
[20:00] <mattbrejza> 50 baud payload?
[20:00] <Upu> 350 is ok if its quick to amend it aim for 500 baud
[20:01] <Upu> though 350 is ok
[20:01] <Upu> whats the transmitter?
[20:01] <Upu> err 500hz not baud
[20:01] <MARSBalloon> Its the NTX2-434.650-10
[20:01] <Upu> ok that doesn't have a TCXO so it may not be quite as stable
[20:02] <Upu> and the shift may decrease as it gets colder so if its easy to do change it to 500ihs
[20:02] <Upu> ish
[20:02] <Upu> 400-500
[20:02] <MARSBalloon> No it doesn't appear to be that stable, I will be getting the NTX2B for the next flight
[20:02] <Upu> they are ok
[20:02] <Upu> stable enough
[20:02] <Upu> everyone is spoilt these days :)
[20:03] <MARSBalloon> ok well it is all changable atm so I will aim for 500Hz
[20:03] <MARSBalloon> 300 baud
[20:03] <Upu> 500Hz no delays between TX
[20:03] <Upu> if you're not transmitting image data
[20:03] <Upu> stick to 50
[20:03] <MARSBalloon> nope just regular UKHAS packets, only need tracking data
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[20:04] <Upu> stick to 50
[20:04] <mattbrejza> ideally the shift should be a multiple of the baud, so 350 shift with 300 baud ill reduce performance
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[20:04] <mattbrejza> s/ill/will
[20:04] <MARSBalloon> ok I will stick to 50
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[20:06] <MARSBalloon> seems sensible I was having problems with corrupted chars at 300
[20:06] <mattbrejza> could also be a timing issue
[20:07] <MARSBalloon> That wouldn't surprise me, its all running off an arduino nano and I am beginning to suspect the delay timers
[20:07] <Upu> using software serial too ?
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[20:07] <Upu> hey RocketBoy can we remove those flights from spacenear.us ?
[20:08] <mattbrejza> or any other background interrupts?
[20:08] <MARSBalloon> I am using the PWM pin 9 for the Tx
[20:08] <MARSBalloon> no interrupts
[20:09] <Upu> keep it to 50 baud with a 400-500 shift and you should be fine
[20:09] <Upu> no delay between TX
[20:09] <Upu> just continious
[20:09] <mattbrejza> LeoBodnar: if NBFM deviation is ~3kHz, is that the frequency difference between the highest and lowest voltage, or the difference between highest or lowest to the middle?
[20:09] <Upu> means the AFC can keep up
[20:09] <MARSBalloon> ok thanks Upu, I will make some changes
[20:10] <mattbrejza> when the balloon is falling 300 doesnt work so well
[20:10] <mattbrejza> (without error correction ;) )
[20:10] <MARSBalloon> I will submit the payload doc with 500Hz, 50baud
[20:10] <Upu> and please test it make sure you appear on the map
[20:11] <MARSBalloon> Will do
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[20:15] <RocketBoy> Upu - can you keep it up for a couple of more hours - Ill chase the Bristol guys
[20:15] <Upu> sure
[20:16] <Upu> might try clean it up
[20:16] <RocketBoy> yeah
[20:16] <RocketBoy> ugly
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[20:18] <Upu> padding error
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[20:22] <Upu> fixed RocketBoy if you could get them to take some screen shots or something
[20:23] <Upu> Darkside is launching soon
[20:23] <RocketBoy> will do
[20:23] <RocketBoy> Ill take some myself
[20:23] <Upu> ta
[20:23] <RocketBoy> just in case
[20:23] <RocketBoy> BTW - thankks for getting uX3 up
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[20:23] <Upu> It was Adam I think
[20:24] <RocketBoy> ah - ta
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[20:29] <DL7AD_> evening
[20:29] Nick change: DL7AD_ -> DL7AD
[20:30] <Lunar_LanderA> hello
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[21:23] <LeoBodnar> it's +- Deviation from nominal freq [21:09] <mattbrejza> LeoBodnar: if NBFM deviation is ~3kHz, is that the frequency difference between the highest and lowest voltage, or the difference between highest or lowest to the middle?
[21:24] <LeoBodnar> so with 3kHz Deviation you swing between 144.797 and 144.803
[21:24] <mattbrejza> cool thanks
[21:25] <Lunar_LanderA> hmm Sunday night not good for instrument development
[21:27] <SpeedEvil> https://www.kickstarter.com/projects/alturn-usa/new-design-pancake-mulitrotor-bldc-for-mulit-copte?ref=categor#
[21:27] <SpeedEvil> Interesting
[21:27] <SpeedEvil> (Though I haven't gone through the actual specs and seen if the weight compares well with tradtional brushless motors.
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[21:31] <Reb-SM3ULC> "Fetched 736 MB in 6s.", mm, clocking error or nice broadband... clock ticks to bed...
[21:32] <Upu> RocketBoy can we remove those flights now ?
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[21:41] <RocketBoy> yeah go on - ive taken some screenshots
[21:41] <Upu> cheers
[21:41] <Upu> too many flights these days :)
[21:42] Action: Willdude123 got an acorn electron today, for £20.
[21:43] <Upu> thats older than you
[21:43] <Upu> by alot
[21:43] <Willdude123> I was like woah, it saves programs on cassettes.
[21:43] <Willdude123> Upu: came out when you were about middle aged, right?
[21:44] <Upu> watch it Willdude123 :)
[21:44] <Willdude123> Brilliant piece of kit though.
[21:44] <Upu> I was younger than you when that came out
[21:45] <Upu> C-64 is where its at
[21:46] <Upu> https://www.youtube.com/watch?v=17gXbL09QEE
[21:47] <Willdude123> Upu: really?
[21:48] <fsphil> I still have a C64
[21:48] <fsphil> nice to fire it up now and then
[21:48] <Upu> Was probably the most powerful 8 bit computer in popular use, there were some others but they died a death
[21:48] <Upu> Was only usperd when the 16 bit Amiga and Atari ST came out
[21:48] <fsphil> I think it's still the most popular single model of computer ever sold
[21:49] <Lunar_LanderA> Willdude123, do you know the movie Micro Men about Acorn and Sinclair?
[21:49] <fsphil> Willdude123: is it the little tiny acorn computer? only slightly larger than the keyboard?
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[21:58] <Willdude123> Ironic
[21:58] <fsphil> bad tape?
[21:59] <fsphil> there was nothing worse than spending 10 minutes for a tape to load and have it fail at the end
[22:00] <snelly> anybody flown a BeagleBone yet?
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[22:02] <SpeedEvil> I know Willdude123 has one, but I'm pretty sure he diddn't fly it yet
[22:02] <Willdude123> snelly: why beaglebone, out of interest?
[22:02] <SpeedEvil> fsphil: recording over the beginning of your copy of manic miner II with the cheat for manic miner II?
[22:02] <snelly> Willdude123: I like the formfactor much more than the RasPI
[22:03] <Willdude123> SpeedEvil: I think I'm switching back to arduino
[22:03] <snelly> more GPIO...and I can run my software on it (Go language)
[22:03] <SpeedEvil> Willdude123: It depends what you're doing. If you need the capability - then tehre's no hope in hell of doing it on an arduino.
[22:03] <Willdude123> snelly: one thing to consider is that they are a bit overpowered
[22:03] <SpeedEvil> If you're using it as an arduino replacement - well - ...
[22:04] <Willdude123> snelly: would you want to do rtty with ssdv?
[22:04] <snelly> they probably are, a little bit
[22:04] <snelly> I have a separate board for SSTV, if I even do that at all
[22:04] <Willdude123> SpeedEvil: no comment ;-)
[22:05] <snelly> I think SSTV only makes sense if you have a huge chase team and someone can dedicate themselves to pointing a yagi as you drive down the road
[22:05] <Willdude123> Wait how does matt plan to get the funds for norbiter?
[22:05] <snelly> or someone doing it from a base station
[22:06] <fsphil> ssdv is easier to receive
[22:07] <fsphil> but slower
[22:07] <Willdude123> snelly: so you just want to build a 70cm rtty tracker?
[22:09] <snelly> nope. I'm building some payload control software. Right now I have it forming proper AX.25 packets and encoding APRS-style compressed position data
[22:09] <snelly> https://github.com/chrissnell/GoBalloon/blob/master/ax25/tests/test-encode.go
[22:11] <Willdude123> Oh right
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[22:14] <malclocke> APRS is doable on arduino though isn't it? asking for my own future plans.
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[22:14] <snelly> well, there are TNC boards for arduino
[22:15] <snelly> from what i've seen, the arduino is too underpowered to decode AFSK well on its own
[22:15] <snelly> since it's just serial, you can use any TNC, really. there's no need for an Arduino formfactor unless you just want it
[22:15] <Lunar_LanderA> how do you generate a negative voltage?
[22:15] <fsphil> malclocke: simple
[22:15] <Lunar_LanderA> are there regulators for that?
[22:17] <adamgreig> connect the battery the other way around
[22:17] <mattbrejza> Lunar_LanderA: this isnt an aprs related qn?
[22:18] <mattbrejza> you can probably avoid it by using virtual grounds, otherwise switch mode regulator can generate -ve from +ve, or just add more batteries
[22:18] <Lunar_LanderA> ah sorry
[22:18] <Lunar_LanderA> ah ok, thanks
[22:19] <mattbrejza> snelly: the easiest way to decode aprs via an arduino would be to use an external fsk demodulator IC, then do the digital stuff on the arduino
[22:19] <mattbrejza> it might be possible to do the signal processing on the arduino, otherwise stm32 :)
[22:20] <snelly> that's a lot of work just to have an arduino :)
[22:20] <mattbrejza> sending aprs is easy enough though
[22:20] <snelly> even with this beaglebone, i can fly enough batteries to easily keep it alive for the flight and recovery
[22:20] <malclocke> mattbrejza, cool thanks, sending is all I'm interested in atm
[22:20] <fsphil> there is a packet decoder for avr somewhere
[22:21] <fsphil> not sure how good it is
[22:21] <mattbrejza> so feed in demodulated bit steam and it pulls out aprs packets?
[22:21] <fsphil> yea
[22:21] <mattbrejza> i cant remember the name of the decoder IC though
[22:21] <mattbrejza> starts with FX or something weird like that?
[22:21] <Willdude123> You know you have bad internet when telnet star wars is lagging seriously
[22:22] <fsphil> it may just use simple square wave decoding
[22:22] <fsphil> gets rid of those nasty multiplications
[22:22] <mattbrejza> oh it samples the AF?
[22:22] <fsphil> yea. I'm trying to find the name of it
[22:23] <mattbrejza> anyway not sure anyone here is trying to do that :P
[22:23] <malclocke> as I side project I want to have a concealed APRS xmitter in the frame of my bike hooked up to a hub dynamo, so it starts tx as soon as you start pedaling. then might not bother locking it up :)
[22:23] <fsphil> https://sites.google.com/site/ki4mcw/Home/arduino-tnc
[22:24] <mattbrejza> oh it is doing all the signal processing
[22:24] <fsphil> yea
[22:24] <mattbrejza> probably doesnt have much of a filter :P
[22:24] <fsphil> all done in software
[22:24] <fsphil> nope :)
[22:25] <fsphil> acutally not square wave, I see a sine lookup table
[22:25] <fsphil> I suppose you could get closer using bit shifting
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[22:28] <mattbrejza> i thought 8x8 mul on an avr only takes at most 3 cycles
[22:28] <mattbrejza> so not too bad
[22:29] <fsphil> this code is doing 8x16
[22:29] <fsphil> maybe that's fairly fast too
[22:29] <fsphil> I don't know avr assembly that well
[22:30] <zyp> 8x16 is two 8x8 operations
[22:32] <mattbrejza> does it FIR filter?
[22:33] <fsphil> doesn't seem to
[22:33] <fsphil> that would be asking too much
[22:33] <mattbrejza> hmm you still need to get rid of the LO*2 products
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[22:34] <mattbrejza> it might integrate over a bit period, thats probably easier
[22:34] <mattbrejza> althoigh only if you know the bit timings
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[22:47] <snelly> damn, I freaking love the Go programming language
[22:47] <snelly> 5 minutes of coding and I now have a TCP-based client/server app for sending through my TNC
[22:47] <LeoBodnar> does it need a heatsink?
[22:48] <snelly> so I run the server on a BeagleBoard out in the shack behind my house and I run the client inside and send APRS through it
[22:48] <LeoBodnar> what are you trying to achieve?
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[23:37] <malclocke> VK3YT-11 due over South America today I believe ...
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[23:41] <Lunar_LanderA> awesome
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[00:00] --- Mon Jun 16 2014