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[07:41] Nick change: Zeph -> Guest33078
[07:41] <Guest33078> oh wow more people in here than I expected
[07:42] <Guest33078> let's see it's 7:40ish in the UK is anyone alive?
[07:50] <juxta|console> hi Guest33078
[07:50] <juxta|console> we're not all in the UK ;)
[07:51] <Guest33078> Hi, I'm trying to find out more information about how to seal the weather balloon and attach a payload without it falling off or breaking the balloon
[07:51] <Guest33078> http://ukhas.org.uk/guides:sealing_the_balloon I saw this
[07:52] <juxta|console> I generally use some lagre-ish zip ties
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[07:53] <juxta|console> the balloon necks are generally very thick
[07:55] <Guest33078> how do you attach the payload do you loop the balloon end over and zip tie it and loop your payload in the sling/hole you just made?
[07:57] <juxta|console> i put a zipe tie on tightly, then tie the cord tightly above the zip tie
[07:57] <juxta|console> then take the balloon off the filler nozzle, and put a could more zip ties around both the cord and neck
[07:57] <juxta|console> a couple* more
[07:58] <Guest33078> a lot of the pictures line the balloon where they zip tie with like a piece of a garbage bag
[07:58] <Guest33078> is that a good idea to have some sort of buffer material?
[08:01] <juxta|console> it couldnt hurt I guess, hehe
[08:01] <juxta|console> but the filler neck is really quite thick, at least 2mm I would say on my balloons
[08:01] <juxta|console> you'd have a hard time damaging it with a zip tie
[08:02] <Guest33078> what kind of cord do you use?
[08:04] <juxta|console> I use bricklayers line - a thin nylon cord which holds at least 10kg
[08:04] <juxta|console> also it's fluro coloured which is nice :)
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[08:45] <Guest33078> will it not slip down and out?
[08:45] <fsphil> morning all
[08:46] <Guest33078> morning
[08:53] <juxta|console> Guest33078: has been fine for me :)
[08:58] <Guest33078> what knot do you use? bowlines?
[09:04] <juxta|console> just overhand knots usually :)
[09:14] <fsphil> here's a related question I've been meaning to ask; how do you secure the payload to the cord?
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[09:23] <juxta|console> fsphil: glue the lines in when I build the payload
[09:23] <juxta|console> http://bogaurd.net/payload/IMG_3492.jpg
[09:24] <fsphil> does the cord go all the way around, under the payload?
[09:24] <juxta|console> nah
[09:24] <juxta|console> i sandwich it between the foam in the joints
[09:25] <fsphil> nice
[09:25] <juxta|console> actually I think in that pic I actually forgot
[09:25] <juxta|console> so I put it on the outside of the foam, and just smeared a bit of hot glue over it with my finger
[09:25] <fsphil> what's the knot on the left of the pic called?
[09:26] <juxta|console> hmm, I don't really know - basically just take the lines and fold them in half, then make an overhand knot with the folded end
[09:27] <juxta|console> here's another one, this one I put the lines on the outside with a smear of glue too:
[09:27] <juxta|console> http://projecthorus.org/wp-content/uploads/2010/08/IMG_3501.jpg
[09:30] <fsphil> good pic
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[09:30] <fsphil> no problem with the glue melting into the foam?
[09:32] <juxta|console> i have a pretty sophisticated heat control system for my hot glue gun
[09:32] <juxta|console> basically I test it on a bit of scrap foam and if it's getting a bit too hot then I unplug the glue gun :D
[09:33] <fsphil> excellent
[09:33] <juxta|console> it only melts the foam when it gets quite hot - there's a good range where the glue is melted but it won't mess up the foam
[09:34] <fsphil> you're packing quite a bit of technology in there: http://projecthorus.org/wp-content/uploads/2010/08/IMG_3500.jpg
[09:36] <juxta|console> yes, that's a handheld radio that's been turned into a repeater :)
[09:36] <Guest33078> do you have problems with circuits touching and shorting
[09:36] <juxta|console> oh, I also use toothpicks in the joins to make them a little stronger fsphil
[09:37] <juxta|console> like dowels I guess
[09:37] <fsphil> genius
[09:37] <juxta|console> Guest33078: those are all zip tied down on stiff foam blocks, it doesnt looks it bit it's rather stable
[09:38] Nick change: Guest33078 -> A01
[09:38] <A01> there easier name
[09:38] <juxta|console> the silvery thing beneath that is an aluminium plate which acts as a heatsink for the TX module, as it gets a bit warm
[09:39] <juxta|console> (& batteries are underneath that, recessed into the foam)
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[10:11] <eroomde> test
[10:14] <fsphil> pass
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[10:43] <m1x10> hi all
[10:44] <m1x10> anyone here expert to batteries?
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[11:19] <juxta> hey m1x10
[11:25] <m1x10> hey
[11:25] <m1x10> I think I figure it out
[11:26] <juxta> figured which out?
[11:26] <m1x10> my 6 battery pack got empty ! after 1 week
[11:27] <juxta> 1 week of transmitting?
[11:27] <m1x10> yeah
[11:27] <juxta> I think it will go flat much faster than that if you are transmitting at a heavy duty cycle
[11:27] <juxta> but you're using APRS right?
[11:27] <juxta> so it would be very low duty cycle
[11:28] <m1x10> i had it last night working and logging and I sew that at 07 oclock it stopped. then I sew the logs and arduino was reporting 3.8volt !
[11:28] <m1x10> yes juxta I can transmit every 32sec
[11:28] <juxta> keep in mind that your GPS will be drawing ~40mA constantly unless you switch it off
[11:29] <m1x10> during those 32 secs the avr is sleeping, the gps does not output anything, and the sensor dont are in idle mode
[11:29] <m1x10> sensors are*
[11:30] <juxta> the gps will still be tracking though & using some power
[11:30] <m1x10> yeah sure.
[11:30] <m1x10> but seems thats its drawing too little
[11:30] <m1x10> I wonder how long it will last with the ultimate lithiums !
[11:31] <juxta> lithiums will give you around 3000mAh
[11:31] <m1x10> each one?
[11:31] <juxta> yes, but you have them in series. so your total capacity is still 3000mAh
[11:31] <m1x10> lol
[11:32] <m1x10> we put them in series just to get the voltage we want?
[11:32] <juxta> yes
[11:32] <m1x10> shit !
[11:32] <m1x10> I hope there is a heat output at least
[11:32] <juxta> I saw you're using the arduino's onboard 5v regulator, which is not really ideal - you're putting in 9v and using 5v, the difference is dissipated as heat
[11:33] <juxta> so you're only using a little over 50% of your battery capacity effectively, the rest is wasted
[11:33] <m1x10> better heat! I have the radio above the regulator and next to the batteries
[11:33] <juxta> okay, i'm off to have some dinner, back shortly
[11:34] <m1x10> juxta as long as it will last more than a week I think i should not worry about battery issues.
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[12:01] <Upu> NTX2 question again :) what's the relationship between voltage and frequency, i.e what voltage difference gives me 425Hz seperation ?
[12:04] <russss> http://ukhas.org.uk/guides:radio_modules?s=ntx2
[12:09] <Upu> oh very nice
[12:32] <DanielRichman> Upu: if you're interested, I *think* 1 pin 1 resistor serial will work :P
[12:32] <Upu> I know :)
[12:33] <Upu> However I have a pile of resistors here none of which are 1M6
[12:33] <fsphil> nice - I managed to get it to two resistors + 1 pin, how'd you get just one resistor?
[12:33] <DanielRichman> I tried it and needed 3M
[12:33] <DanielRichman> fsphil: the ntx2 has an internal resistance so you can make a potential dividor between one resistor and the ntx2 txd pin
[12:33] <Upu> I could place a terminal in each of my wifes hands and use her as the resistor but it may blow my payload weight design
[12:34] <DanielRichman> each hand might be a bit more than 3mM
[12:34] <DanielRichman> 1M6 produced a shift of 1000 but that may be because my module is different, It's hard to know w/o trying it
[12:34] <DanielRichman> also you'd have to use software serial; the arduino hardware serial library isn't up to it
[12:35] <DanielRichman> also I *think* the usart is really noisy but haven't done science to prove it yet
[12:35] <Upu> I just measured her shes 4M ohms :)
[12:35] <fsphil> haha
[12:35] <Upu> afk walking the dog
[12:36] <Upu> I'm using software serial
[12:36] <Upu> well using Robs library
[12:36] <Upu> it works
[12:36] <Upu> just the shift is wrong
[12:36] <Upu> now afk
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[15:21] <Upu> well I've fiddled with the resistors in an attempt to increase the carrier shift and its now even smaller :/
[15:21] <Upu> which doesn't add up at all
[15:22] <Upu> however at 182 carrier shift I'm getting perfect decoding now
[15:22] <Upu> According to the circuit simulator my voltage difference is about 0.4v
[15:22] <Upu> which really should be giving me more than 182 carrier shift
[15:25] <fsphil> have you tried measuring directly?
[15:26] <Upu> don't have anything that can measure it
[15:27] <fsphil> you could use a multimeter if you slow it down enough, or write a program to toggle the pin every few seconds
[15:28] <Upu> I can get it up to 425 shift but I'm switching 1V each way now
[15:28] <Upu> good idea
[15:28] <Upu> I'll go do that
[15:28] <Upu> when dl-fldigi says sentence uploaded where is it sending it too ?
[15:29] <fsphil> rob h's server
[15:29] <fsphil> http://www.robertharrison.org/listen/view.php
[15:29] <fsphil> look at the bottom :)
[15:31] <m1x10> hi all
[15:31] <fsphil> hiya m1x10
[15:31] <fsphil> how's things going today?
[15:31] <m1x10> fine 37C in my room :)
[15:31] <m1x10> and u?
[15:32] <m1x10> I just sew that the fsa03 rebooted. Is any reason about that?
[15:32] <fsphil> going well here, and a toastie 20.8C ;)
[15:32] <Upu> it's me!
[15:33] <Upu> ok back later on
[15:33] <fsphil> how do you know it rebooted m1x10?
[15:34] <m1x10> because it started outputting the GPTXT messages which only happens at boot. And then it continues with all other nmea sentences which I disable when arduino is powered on.
[15:35] <m1x10> PUBX,00,142743.00,4038.95538,N,02256.68117,E,320.887,G3,35,26,2.239,327.24,0.000,,3.34,3.37,2.78,5,0,0
[15:35] <m1x10> >40.6492/22.9446/000320/327/002/+000/05/44/+37/26/17/1000/1850/1727/IKAROS
[15:35] <m1x10> GPTXT,01,01,02,u-blox ag - www.u-blox.com
[15:35] <m1x10> >;;;;;;;/;;;;;;;/;;;;;;/;;;/;;;/;;;;/;;/44/+37/26/17/1000/1851/031,/IKAROS
[15:35] <m1x10> GPVTG,,,,,,,,,N
[15:35] <m1x10> GPGGA,142834.28,,,,,0,00,99.99,,,,,,
[15:35] <m1x10> GPRMC,142842.00,V,,,,,,,140810,,,N
[15:35] <m1x10> and so on
[15:37] <m1x10> not sure if its a reboot
[15:37] <m1x10> but its like falling to a default situation
[15:37] <fsphil> power glitch?
[15:38] <m1x10> dunno
[15:39] <fsphil> how long was it on for?
[15:40] <m1x10> some hours. now i reboot arduino and everything works ok.
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[17:39] <Upu> Free advise if you forget to set pinMode on your digital pins to OUTPUT you'll spend 3 days head butting a wall with your NTX2, this was a public service annoucement.
[17:40] <Upu> god my spelling is bad
[17:40] <Upu> if you don't set pinMode to output a low voltage is 1.7V
[17:44] <russss> heh
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[17:54] <SpeedEvil> :)
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[18:29] <fsphil> d'oh!
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[18:40] <Dently> Any word on KD8EYH-12?
[18:50] <m1x10> hi all
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[21:40] <Dently> What kind of video camera are people using for balloons?
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[21:53] <m1x10> heh
[21:53] <m1x10> Dently,many kinds
[21:53] <m1x10> others use HD
[21:53] <m1x10> others use cheap spycams each 20$
[21:54] <m1x10> others use canon cameras
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[22:20] <timbobel> m1x10 here?
[22:20] <timbobel> ping m1x10
[22:23] <m1x10> hey ho :)
[22:23] <timbobel> can you send the schematic again how you hooked up the fsa03
[22:23] <timbobel> well that picture
[22:23] <timbobel> with the ftdi
[22:23] <m1x10> sure yeah
[22:23] <m1x10> give me a moment
[22:24] <m1x10> http://imagebin.org/109686
[22:25] <timbobel> luckily i have a 3v3 breakout ;)
[22:25] <m1x10> yeah
[22:25] <m1x10> less wires then
[22:25] <timbobel> direct hook-up, right?
[22:25] <timbobel> and, do you know what the CTS is for?
[22:25] <m1x10> forget the CTS things
[22:26] <m1x10> just rx/tx vcc gnd
[22:26] <m1x10> i dont wire directly
[22:26] <m1x10> i pass through regulator
[22:27] <m1x10> ah you said you got 3v3
[22:27] <m1x10> yeah go on then
[22:27] <timbobel> what did you do
[22:27] <timbobel> i got it hooked up now
[22:27] <m1x10> rx/tx go to tx/rx
[22:28] <m1x10> cross them
[22:28] <timbobel> obviously
[22:28] <m1x10> ok
[22:28] <m1x10> ucenter?
[22:28] <timbobel> but, what did you configure
[22:28] <timbobel> yeah
[22:28] <m1x10> timbobel really dont remember what i did. I was in a freaked out situation.
[22:28] <m1x10> just try the menus
[22:28] <m1x10> its rather easy
[22:29] <m1x10> looks like driving a spacecraft when satellites come in
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[22:51] <timbobel> mine is now broken though
[22:51] <timbobel> broken on impact. surely
[22:51] <timbobel> i reboot the falcom.. it finds sat's for 5 seconds
[22:51] <timbobel> then goes blank again
[22:51] <timbobel> so VERY unrecommended in terms of use for hab & hard landings
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[22:54] Nick change: SpeedEvil1 -> SpeedEvil
[22:54] <m1x10> hmm
[22:55] <m1x10> did u try to play with ant?
[22:55] <timbobel> a bit
[22:55] <timbobel> its not ant, since it finds a signal for max 5 secs
[22:56] <m1x10> try more
[22:56] <m1x10> turning the ant
[22:56] <m1x10> left right
[22:57] <timbobel> how can it be the ant if it gets signal and then loses until watchdog reset
[22:57] <m1x10> the breakout and the chip cannot be broken
[22:57] <m1x10> its just the ant
[22:57] <m1x10> cuts the rf
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[22:58] <timbobel> well no its not the chip or breakout since it seems to function ok
[22:58] <m1x10> fsa has some funtions with to check the ant status
[22:58] <m1x10> maybe the rf is not working good and the chip stops it completely
[22:58] <m1x10> when i turned my ant
[22:59] <timbobel> LOL
[22:59] <timbobel> i turned the ant ass you said
[22:59] <timbobel> a cracking sound came out
[22:59] <timbobel> now its kinda loose
[22:59] <timbobel> no wait
[22:59] <m1x10> some tiny wires were broken but i got full rf
[22:59] <timbobel> its entirely loose now
[22:59] <timbobel> it has come off
[22:59] <m1x10> lol
[22:59] <timbobel> so lets reset now, without ant
[23:00] <m1x10> if you dont get rf
[23:00] <m1x10> try moving to other side
[23:00] <m1x10> I had that crack sound
[23:00] <m1x10> too
[23:01] <timbobel> so bad idea
[23:01] <m1x10> u destroyed it?
[23:01] <timbobel> the antenna
[23:01] <timbobel> is
[23:01] <timbobel> OFF
[23:01] <timbobel> hence the cracking sound
[23:01] <timbobel> seperate
[23:02] <m1x10> WHAT?
[23:02] <m1x10> ant separated from breakout ?
[23:02] <timbobel> funny thing is, it starts fimnding sattelites when you reset -always-
[23:02] <timbobel> so it indeed could have been the ant
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[23:12] <m1x10> i believe you can do it
[23:18] <timbobel> lol
[23:18] <timbobel> well
[23:18] <timbobel> it didnt break off the solder
[23:18] <timbobel> no
[23:19] <timbobel> it broke off the top part of the PCB of the falcom
[23:19] <timbobel> i was just trying another antenna, a normal (good) one
[23:19] <timbobel> which worked for a bit but now died
[23:20] <timbobel> so ok
[23:20] <timbobel> the antenna is a piece of crap, were sure about that
[23:21] <m1x10> yeah
[23:21] <m1x10> too fragile
[23:22] <m1x10> its the only thing i dont like
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[23:30] <timbobel> soldertime
[23:30] <m1x10> hehe
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[23:47] m1x10 (m1x10@ppp089210151148.dsl.hol.gr) left irc: Quit: I eat electrons for breakfast and I vomit thunders
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[00:00] --- Sun Aug 15 2010