highaltitude.log.20130504

[00:00] <heathkid> closest repeater takes me 25W *minimum* on 2M to hit...
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[01:56] <x-f> Ariane Space Vega launch in 10 minutes - http://www.arianespace.tv/
[01:57] <Randomskk> I thought that got scrubbed
[01:58] <x-f> what? why?
[01:58] <Randomskk> bad high alt winds
[01:58] <Randomskk> postponed
[02:02] <x-f> yeah, really, heh
[02:03] Action: x-f heads back to bed.
[02:26] <KT5TK> Tracking SolarImpulse across America: http://live.solarimpulse.com/
[02:31] <arko> oh wow
[02:31] <arko> what is this?
[02:31] <KT5TK> Solar plane
[02:31] <arko> nice!
[02:32] <KT5TK> trying to cross the US
[02:32] <arko> i remember seeing the promo for this
[02:32] <arko> hmm
[02:32] <arko> obviously not all in one run ay?
[02:32] <nigelvh> KT5TK, unrelatedly, do you guys have any 220MHz stuff down there?
[02:35] <KT5TK> Yes, we have a running repeater in Houston and our group is about to put up another repeater soon
[02:35] <nigelvh> Any packet or APRS stuff?
[02:35] <KT5TK> not on 220
[02:35] <KT5TK> do you?
[02:35] <nigelvh> Hmm, I've got a 220 radio that I'm considering setting up to be a 220 digipeater.
[02:36] <KT5TK> I always thought that 2m only was stupid for APRS. But nobody uses other freqs. Not even 70cm
[02:37] <nigelvh> We've got a little 70cm 9600 baud up here, but might as well have this radio do more than absolutely nothing, so I'm thinking of setting up a 1200baud digipeater.
[02:38] <nigelvh> Trying to figure out if there exists an "APRS" frequency on 220 like there is on 2m.
[02:38] <arko> KT5TK this is awesome
[02:38] <KT5TK> Our local 2m repeater is close to the APRS qrg 144.39, so I often get desensing and splatter in the speaker
[02:38] <arko> how many days are they going to do it over
[02:40] <KT5TK> I think 5 flights are planned: http://www.solarimpulse.com/en/across-america/
[02:40] <KT5TK> with several days pause between each
[02:41] <KT5TK> I was discussing the 70cm APRS frequency with Robert Buringa himself, but I didn't get a final reply. Nothing for 220 yet
[02:42] <nigelvh> Yeah. There seems to be some 220 digital communications around here, so I'll probably end up trying to chat with that group to see what's there, and not use their frequencies.
[02:44] <KT5TK> If you link 2m APRS with 220 that may make sense
[02:44] <nigelvh> Yeah
[02:45] <KT5TK> forward in both directions
[02:53] <nigelvh> First challenge is figuring out what freq to use.
[02:56] <KT5TK> http://en.wikipedia.org/wiki/1.25-meter_band may help
[02:59] <KT5TK> 223.39223.490 and 223.59223.890 seems to be assigned for high speed data
[02:59] <KT5TK> Not sure if 20 wpm morse counts as high speed data...
[02:59] <nigelvh> Yeah, I've seen that elsewhere, but it's not terribly specific as to a agreed upon frequency for APRS/Packet
[02:59] <nigelvh> Like 144.39 is/
[03:00] <KT5TK> There is no such thing.
[03:00] <KT5TK> If you set up yours will be probably the first on 220
[03:00] <nigelvh> Hmm
[03:01] <KT5TK> I'd encourage 220 (and also 70cm) APRS
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[03:02] <KT5TK> The advantage for 70cms is that there should be plenty of radios out there that can use APRS on440 just out of the box
[03:02] <KT5TK> But without infrastructure nobody goes there.
[03:03] <nigelvh> Yes. We do have 70cm APRS. It's not used by everyone, but we do have digipeaters there.
[03:03] <KT5TK> It simply needs someone to start it
[03:03] <nigelvh> http://www.nwaprs.info/
[03:03] <KT5TK> I've heard that, but WA is really the exception
[03:03] <nigelvh> 220 looks to need a little help
[03:04] <KT5TK> in deed
[03:05] <KT5TK> Our group used to have a 220 repeater up but lost the location several years ago.
[03:05] <KT5TK> Now we want to put up the still working repeater on my office building
[03:06] <nigelvh> Yeah, My house is on a decent hill, right near the water tower, so it should be a decent location.
[03:06] <nigelvh> Seattle is a hard area geographically to reach everyone.
[03:08] <griffonbot> @Mariano817: No me acordaba que el estudio cansaba tanto, aguante #CUSF [http://twitter.com/Mariano817/status/330519350186504192]
[03:13] <griffonbot> @Mariano817: #CUSF aguante comunicación social [http://twitter.com/Mariano817/status/330520613972221952]
[03:15] <griffonbot> @fedemuratoresf: RT @Mariano817: #CUSF aguante comunicación social [http://twitter.com/fedemuratoresf/status/330521064612442112]
[03:16] <KT5TK> nigelvh: do you personally use 440.800MHz at 9k6?
[03:17] <nigelvh> No
[03:17] <nigelvh> I don't have any 9k6 packet capability
[03:17] <KT5TK> I believe 96kbaud is a typo on the nwaprs.info page :)
[03:19] <nigelvh> Yes.
[03:20] <nigelvh> It's not a terribly well put together page.
[03:20] <KT5TK> Well, it doesn't matter as long as the info and content is helpful
[03:20] <KT5TK> Better this than no page at all
[03:21] <KT5TK> No Flash required
[03:22] <nigelvh> True enough
[03:22] <nigelvh> No flash is certainly a good thing.
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[06:43] <KT5TK> solarimpulse preparing for landing: http://live.solarimpulse.com
[06:45] <jcoxon> morning KT5TK
[06:46] <KT5TK> good morning
[06:47] <KT5TK> Solar plane trying to cross the US just on solar power
[06:47] <arko> neato
[06:47] <jcoxon> KT5TK, got my Si570 doing RTTY last night
[06:48] <jcoxon> found a licence exempt freq we could use (13.553Mhz)
[06:48] <KT5TK> very nice. What shift are you using?
[06:48] <jcoxon> about 470hz
[06:48] <KT5TK> This might be used by many Amateur receivers
[06:48] <jcoxon> https://github.com/jamescoxon/si570
[06:49] <jcoxon> rtty1
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[06:49] <jcoxon> its currently set to 10.140Mhz
[06:50] <KT5TK> nice. Do you amplify the signal?
[06:50] <jcoxon> not currently
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[06:50] <jcoxon> if i was to fly it in the UK i'm limited as always
[06:51] <jcoxon> so would run it through a filter but other then that direct
[06:51] <KT5TK> do you have any way to measure the output?
[06:51] <KT5TK> power^
[06:52] <jcoxon> not really
[06:52] <jcoxon> is there a clever trick i could do to measure it?
[06:52] <jcoxon> it'll be quite low
[06:52] <KT5TK> With a bolometer
[06:52] <KT5TK> just use a 50 ohms SMD resistor
[06:53] <KT5TK> and a small temperature sensor.
[06:53] <KT5TK> You can calibrate that with simple DC voltage
[06:53] <KT5TK> since 50 ohms is constant
[06:54] <jcoxon> will do that at some point
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[06:55] <KT5TK> What is the allowed output at 13.5MHz?
[06:56] <griffonbot> Received email: Steve Aerospace "Re: [UKHAS] Flight Announcements - Elsworth launch fest
[06:56] <ibanezmatt13> Good Morning everyone! Not sure if you remember me, but I've finally ordered the NTX2 radio transmitter and the Ublox GPS module in readiness for my first launch this Summer. Once those exams are out of the way, I'm ready!
[06:57] <jcoxon> KT5TK, you ready for this...
[06:57] <jcoxon> 42 dBuA/m at 10 m
[06:57] <jcoxon> which we've worked out to be about 10mW
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[06:57] <KT5TK> OMG what a unit!
[06:58] <KT5TK> They are afraid that you don't get cooked from RF
[06:58] <codrBlu> ibanezmatt13, great to hear it. I'm about at the same place. Where are you located?
[06:59] <jcoxon> KT5TK, our theory is that its because they don't expect you to have efficient dipoles at that freq to measure an e.r.p
[07:02] <KT5TK> Well with your 5 element 20m yagi on your roof tuned to 13.5 MHz this should not be a big problem to receive...
[07:04] <KT5TK> Did you think about a similar mode like WSPR?
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[07:06] <KT5TK> Great job with coding rtty1
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[07:11] <jcoxon> KT5TK, yeah i did think about wspr
[07:11] <jcoxon> and there is code out there
[07:12] <jcoxon> i thouht i'd make it do something i'm familiar with
[07:12] <KT5TK> The key is probably the 6 digit locator on WSPR
[07:12] <jcoxon> and with the dl-fldigi network its actually possible that we could track a balloon with a si570 doing rtty
[07:12] <KT5TK> Yes, true
[07:13] <KT5TK> PSK works with dl-fldigi as well btw.
[07:13] <KT5TK> PSK31
[07:13] <jcoxon> not as straight forward as rtty :-p
[07:14] <KT5TK> I had no problems
[07:14] <KT5TK> on 15m and on 40m from an actual balloon
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[07:14] <jcoxon> KT5TK, you just need more listeners :-p
[07:15] <KT5TK> easier to say than to do in a country with huge distances
[07:15] <KT5TK> between stations
[07:15] <jcoxon> yeah
[07:15] <jcoxon> i understand
[07:16] <jcoxon> europe would be better suited
[07:16] <KT5TK> Texas is larger than France
[07:16] <jcoxon> well its certainly worth a go
[07:16] <jcoxon> i think we might fly it on a 35km floater
[07:16] <jcoxon> with a back up radio on 70cm
[07:17] <KT5TK> Yes, floaters and shortwave are always a good idea
[07:18] <KT5TK> when they reach regions with a low listener density
[07:18] <jcoxon> well the winds have shifted
[07:18] <jcoxon> http://nstar.org/GFS/10mb/10mb.012.png
[07:18] <jcoxon> in theory
[07:18] <jcoxon> i mean in theory
[07:18] <jcoxon> we could do a trans-a
[07:19] <KT5TK> So can we expect a floater soon?
[07:19] <KT5TK> I'm ready to track on 70cms
[07:20] <jcoxon> i'm sure we'll give it ago
[07:20] <KT5TK> When is the best time for an E>W crossing?
[07:21] <jcoxon> during the summer months
[07:21] <jcoxon> but those winds are slow
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[07:22] <KT5TK> Not too bad at the picture
[07:22] <fsphil> definitly want to try that trans-a path
[07:23] <jcoxon> on that note i better go and do revision for the exam i have on tuesday
[07:23] <jcoxon> which is getting in the way of ballooning
[07:23] <jcoxon> cya
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[07:23] <KT5TK> Good luck jcoxon!
[07:24] <fsphil> I doubt it could be done east to west without a different kind of balloon
[07:24] <KT5TK> Maybe the winds are faster in spring than in summer?
[07:26] <KT5TK> solarimpulse cleared for landing in Phenix
[07:26] <KT5TK> http://live.solarimpulse.com/
[07:27] <arko> here we go
[07:29] <fsphil> it looks like it's stuck in the air
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[07:30] <KT5TK> Note the cyclist
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[07:58] <arko> hah!
[07:58] <arko> he's wearing a spot
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[08:26] <drlizau> I'm VK2XSE and on channel after an IRLP chat with VK5QI
[08:26] <Darkside> aha
[08:26] <Darkside> yep
[08:26] <Darkside> hi
[08:26] <Darkside> VK5QI here
[08:29] <Darkside> so the callsign list I have is:
[08:29] <Darkside> VK2URB-7 - Balloon
[08:29] <Darkside> VK3YT-11 - Balloon
[08:29] <Darkside> VK2URB-11 - Car
[08:29] <Darkside> VK2URB-10 - Car
[08:29] <Darkside> VK2XSE-9 - Car
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[08:29] <drlizau> I'm hoping to find Robert early enough to get those URB callsigns confirmed
[08:29] <Darkside> thanks
[08:30] <Darkside> the APRS standard says -11 and -12 for balloons
[08:30] <drlizau> I will have internet access and be running my mobile iGate out there
[08:30] <Darkside> so having his cars reporting -10 and -11 is very confusing
[08:30] <drlizau> but we can't access the 2m repeater system from the launch area
[08:31] <Darkside> no probs
[08:31] <drlizau> so I hope to find him in good time to confirm those
[08:31] <Darkside> my phone number is 0407 302 353
[08:31] <Darkside> might be faster than emailing me
[08:31] <drlizau> last time he was using -13
[08:32] <drlizau> and -11 for the balloon
[08:33] <Darkside> ok
[08:33] <Darkside> well I jsut need to know, else i can't get the live preictions running
[08:33] <drlizau> VK2KNV-7 will be in my car
[08:34] <drlizau> I'm going to get him to drive so I can play radios and computers
[08:34] <Darkside> hrm, KNV-7?
[08:34] <Darkside> i thought your car was 2XSE-9?
[08:34] <drlizau> but it may be a callsign that comes up as well
[08:34] <drlizau> my car's permanent call is VK2XSE-9
[08:34] <drlizau> but I have an OM
[08:35] <drlizau> KNV-7 is capable of walking from the car but the radio is very low power!
[08:36] <Darkside> ok, i dont have uch capability of putting portable aprs stuff on the map
[08:37] <Darkside> it'll be cars and balloons
[08:37] <drlizau> http://aprs.fi/info/?call=VK2URB* shows the unusual configuration
[08:39] <Darkside> yeah..
[08:39] <Darkside> dammit robert, why can't you confirm to standard...
[08:39] <Darkside> grrg
[08:39] <Darkside> oh well
[08:39] <Darkside> i'll figure it out tomorrow
[08:40] <Darkside> vk3yt appears to have realised his mistake
[08:40] <drlizau> and VK2URB-7 appears to be in VK3YT-7 's possession
[08:41] <drlizau> I'll message him on APRS
[08:41] <drlizau> that'll be fun!
[08:42] <Darkside> haha
[08:42] <drlizau> VK3YT, are you lost??
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[08:43] <drlizau> 05/04 18:42 VK2XSE-2 >are you lost?
[08:43] <drlizau> 05/04 18:42 VK2XSE-2 >return to Sturt Highway
[08:43] <drlizau> 05/04 18:42 VK2XSE-2 >and travel to Narrandera
[08:43] <drlizau> 05/04 18:43 VK2XSE-2 >use repeater on 146.850 with 91.5 CT
[08:43] <drlizau> he he
[08:43] <Darkside> hehe nice
[08:44] <drlizau> if he has the transmitter for the balloon he can confirm the setting
[08:46] <drlizau> he's still very lost
[08:48] <drlizau> next (s)he'll hit a roo
[08:48] <drlizau> wrong place to be at night
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[08:51] <Darkside> im plotting his car on spacenear.us/tracker/ as a test
[08:52] <drlizau> I think I have his attention at last
[08:52] <drlizau> after a series of APRS messages
[08:53] <Darkside> he's on the repeater?
[08:53] <drlizau> the poles have a balloon up
[08:53] <drlizau> he's not on the repeater
[08:53] <Darkside> they havent launched it yet
[08:53] <Darkside> will be doing that soon enough though
[08:54] <drlizau> i've given him a series of call signs
[08:54] <drlizau> and my phone number
[08:54] <Darkside> haha i see
[08:54] <drlizau> but he's still trying to go north
[08:54] <Darkside> just looking at the message log
[08:54] <drlizau> instead of north west
[08:54] <malgar> what do you think about using a really short connection string? somethink like 30 cm or less (none?) :)
[08:55] <Darkside> malgar: from the balloon?
[08:55] <Darkside> you want to be very careful that the payload antenan doesn't hit the balloon and burst it
[08:55] <malgar> yes
[08:55] <Darkside> remember the balloon will expand in size a lot, making this more likely at high altitudes
[08:56] <Darkside> some people have put payloads in the balloon neck
[08:56] <malgar> on the balloon neck! interesting
[08:56] <malgar> is there a webpage about?
[08:56] <Darkside> that works, but the balloon can tumble quite a bit, as the centre of gravity is closer to the centre of the balloon
[08:56] <Darkside> dont think so
[08:56] <Darkside> a tumbling payload is bad for reception
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[08:56] <Darkside> we prefer to have our payloads *well* below the balloon
[08:56] <malgar> ok
[08:56] <Darkside> like, 5-10m
[08:57] <malgar> ok
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[08:57] <daveake> More is good, so when the chute lands in the top of a tree the payload is hanging at the bottom :)
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[08:58] <daveake> On the other hand, more likely to hit a tree/pylon in the first place
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[09:04] <tim601> jak tam balon ?
[09:05] <SQ5AAG> test
[09:05] <Darkside> balloon has launched
[09:06] <Kciukowski> test
[09:07] <sq5cjz> leci!
[09:08] <Darkside> i'm enabling predictions for the poland flight now
[09:08] <Darkside> assuming 31km burst
[09:08] <Darkside> no idea if this is accurate or not, but it's something
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[09:14] <sq5cjz> okolice Warszawy zapraszamy na 145.575 w celu komentowania sygnaBu
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[09:16] <drlizau> VK3YT has finally chosen an appropriate route
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[09:16] <drlizau> so he has now stopped
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[09:34] <drlizau> darkside can now confirm balloon on VK2URB-7 for tomorrow
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[09:52] <Darkside> drlizau: ok thanks
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[10:01] <Darkside> oh7lzb: ping
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[10:09] <drlizau> Darkside: I've just run 2 different prediction scenarios for VK2URB-7. Glad I filled the car this arvo, we could be going a long way
[10:10] <Darkside> yep
[10:10] <Darkside> 33km expected burst for robs balloon, right?
[10:12] <drlizau> i was putting in 31km
[10:12] <Darkside> ok
[10:12] <drlizau> i'd better run them again
[10:12] <Darkside> i'll be setting the predictor for 30km tomorrow
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[10:37] <timm_> 25513 now
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[10:38] <timm_> 25914bnow
[10:39] <Hix> whats the url fo rthe mobile tracker pls? lost it
[10:40] <Darkside> habhub.org/mt/
[10:41] <timm_> please see http://aprs.fi/#!call=a%2FSP9UOB-11&timerange=3600&tail=3600 name SP9UOB-11
[10:42] <timm_> 27441 NOW
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[10:43] <Darkside> we don't need the running commentary timm_
[10:43] <Darkside> we can all see
[10:44] <Upu> timm_ we are importing SP9UOB-11 into www.spacenear.us/tracker
[10:45] <Upu> interesting loop
[10:45] <Upu> if loops intest you
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[10:46] <Upu> interest
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[10:51] <timm_> OK
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[10:55] <timm_> Will record ?
[10:58] <Upu> got a way to go yet
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[10:58] <Upu> I'll get excited when it clears 43km
[11:01] <timm_> wait-see
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[11:06] <m0tfo> just out of interest, what is the ground temp.
[11:07] <timm_> Temperature: -8 °C
[11:08] <chrisstubbs> Does anyone know of a good tutorial/schematic for how to add a microsd reader to 3.3v arduino projects (eg not a module, just solder straight onto a custom board)?
[11:08] <m0tfo> wow cold!
[11:09] <m0tfo> are you sure it -8 at ground level sound too cold for this time of the year.
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[11:10] <timm_> temperature in Poland ? now
[11:10] <m0tfo> yes
[11:11] <timm_> now is 15°C
[11:11] <m0tfo> ok thanks...
[11:11] <timm_> ok
[11:12] <drlizau> Darkside: we have parked all at the same place the following callsigns VK2URB-9 VK3YT-7 VK2FABX VK3XCO which look like the remainder of the chase team
[11:15] <sq5cjz> pekl?
[11:15] <timm_> o cholipa ... chyba ...
[11:16] <timm_> szkoda
[11:17] <x-f> burst :(
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[11:18] Nick change: tommat -> sq9rox
[11:19] <x-f> i was in the middle of building a yagi for it, lol
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[11:28] <domlin> fork handles
[11:30] <x-f> :|
[11:30] <domlin> afternoon all, is what i meant to say
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[11:37] <Hix> cheers Darkside i missed that
[11:39] <Hix> chrisstubbs: this may help, i know its a std sd but the principles are there http://www.ladyada.net/make/gpsshield/
[11:41] <chrisstubbs> Great cheers man
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[11:53] <cuddykid> anyone know if power from 3v3 arduino IO pins will be enough to trigger these rocket motor ignitors?
[11:54] <Hix> i would have thought they pull too much current
[11:54] <Hix> http://ava.upuaut.net/?p=143 cuddykid
[11:54] <cuddykid> cheers Hix
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[12:08] <RocketBoy> or where the idea originated from http://wiki.ukhas.org.uk/ideas:flight_support?s[]=pyrotechnic&s[]=cutdown
[12:10] <RocketBoy> standard rocketry igniters are about 1 to 2 ohm and need about an amp or so to fire
[12:10] <RocketBoy> but only for a short time
[12:11] <Upu> I never measured the current required
[12:11] <RocketBoy> its worth noting that when they fire the plasma almost shorts out the 2 leads for a split second
[12:12] <RocketBoy> thats why some rocketry flight computers have a 2nd battery
[12:13] <RocketBoy> so that the igniter firing doesn't kill the flight computer
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[12:13] <Upu> you can use a big cap but my designs power the cutdown from a separate battery
[12:14] <Upu> not that I use it
[12:16] <RocketBoy> cough (not that I use them) but I tie in the pyro battery to the main battery with a shotkey diode - otherwise the pyro battery is a bit o a waste of weight.
[12:18] <RocketBoy> there is a (now somewhat old but) good article on rocketry igniters here http://www.gwiz-partners.com/igniters.pdf
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[12:19] <Hiena> Well, why notgoing to the HV ignition? Simple converter, a HV cap with a few hunred uF and a DC connector.
[12:20] <Darkside> hrm
[12:20] <Darkside> i power my cutdown board and the nichrome itself from 2xAA batteries
[12:20] <Darkside> the cutdown board boosts up to 3.3v, and hgte boost converter handles the voltage drop
[12:21] <Darkside> if the batteries get too flat it might not work though, but that only happens after about 20 hours of flight
[12:21] <Hiena> At the ground the cap charged with an external battery. The flight battery only topping it, running the HV converter for a few sec on every minutes.
[12:21] <Darkside> so hasnt been a problem so far
[12:21] <Upu> I put a cut down on a new board
[12:21] <Upu> needs testing
[12:21] <Darkside> i just used a fet and some nichrome wire
[12:21] <Darkside> works nicely
[12:22] <Upu> well thats what I made
[12:22] <Upu> need to do some soldering
[12:22] <Darkside> how are you going to trigger yours
[12:22] <Darkside> uplink?
[12:22] <Upu> no
[12:22] <Darkside> aww
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[12:22] <Upu> in code
[12:22] <Darkside> aww
[12:22] <Darkside> i prefer manual control
[12:22] <henk__> hi
[12:22] <Upu> with the RFM22B being EoL
[12:22] <Upu> I need to look at alternatives
[12:22] <Darkside> Upu: mm
[12:23] <Darkside> for the moment our RFM22B payloads work fine, and i have spare RFMs
[12:23] <Upu> they sent me 5 of the replacements
[12:23] <Upu> but they don't run @ 1.8v
[12:23] <Darkside> yeah i dont mind the non-1.8v business for the cutdown
[12:23] <Darkside> as i need 2xAAs in parallel there anyway for it to work
[12:23] <Darkside> so 3.3v is fine
[12:23] <Upu> but they don't work with a step up anyway
[12:23] <Darkside> plus the cutdown payload isnt goign to be used on a floater
[12:23] <mattbrejza> *cough* cc430 *cough*
[12:23] <Darkside> mattbrejza: yeah
[12:23] <Darkside> mattbrejza: something i'm looking at
[12:24] <mattbrejza> or just cc1101
[12:24] <Darkside> though 10mw down is a bit shit
[12:24] <Darkside> or Si1000
[12:24] <Upu> 4464 ?
[12:24] <Darkside> Si1000 has an 8051 core in it
[12:24] <mattbrejza> you can get cheap cc1101 boards of da internet
[12:24] <mattbrejza> *off
[12:24] <Darkside> Upu: the RFM22Bs do work with a stepup
[12:24] <Upu> they do but noise causes issues
[12:24] <Darkside> with enough decoupling i've got the noise floor on them down to acceptable levels
[12:24] <Darkside> i.e. -105dBm
[12:25] <Upu> oh ok
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[12:25] <Upu> anyway
[12:25] <Darkside> lots of decoupling on the board, and small ferrites on the power leads
[12:25] <Upu> this board has an LMT2 on it
[12:25] <Darkside> works like a charm
[12:25] <Darkside> ahh the LMt
[12:25] <Darkside> LMT2
[12:25] <Darkside> isnt that thing hueg?
[12:25] <Darkside> and heavy
[12:25] <Upu> well its larger than RFM22B
[12:25] <Upu> 6g
[12:25] <Darkside> mm
[12:26] <Upu> frequency agile
[12:26] <Upu> and has a TCXO
[12:26] <Upu> so nice and stable
[12:26] <Darkside> mm
[12:26] <qyon> SP9UOB baloon over 40km and rising.
[12:26] <Upu> for this board its ideal
[12:26] <Darkside> mm
[12:26] <Upu> this needs to be rock solid
[12:26] <Upu> nothing trick just needs to work
[12:26] <Darkside> yeah we dont care so much with the cutdowns
[12:26] <Darkside> +- 10KHz is fine
[12:26] <Upu> been a whle since we've had one top 41km
[12:26] <Upu> go SP9UOB
[12:27] <Darkside> go go go
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[12:27] <qyon> 41km :)
[12:27] <Upu> awesome
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[12:28] <daveake> Buzz2 goes down 1 more place :( :p
[12:28] <Upu> not in the top 10 yet :)
[12:28] <daveake> nope
[12:29] <Darkside> pretty high ascen rate
[12:29] <Upu> H2
[12:29] <RocketBoy> Hiena: If your suggesting using high voltage to fire a rocketry igniter then it won't - I've seen standard rocketry igniters not fire on 18V - the filament burns out before it has time to transfer enough energy to the pyrogen
[12:29] <Darkside> wheres the records
[12:29] <Upu> normal
[12:29] <Upu> its 10th now
[12:29] <Upu> http://ukhas.org.uk/general:uk_records
[12:29] <daveake> <2010> You can't get to 40km; beyond 38 there be dragons
[12:29] <Upu> UK record pretty much = world records
[12:29] <qyon> 41797m
[12:30] <daveake> 2011 too
[12:30] <Darkside> it was 2011 when it happened
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[12:30] <Darkside> when i broke 40
[12:30] <Darkside> with Horus 15.5
[12:30] <daveake> ah I was right first time then :)
[12:30] <cuddykid> Darkside: do you have your uplink code posted yet?
[12:30] <daveake> #9 so far
[12:30] <Darkside> cuddykid: not really, no
[12:30] <qyon> 42047 :)
[12:30] <daveake> 42
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[12:31] <Upu> So glad to see some of the new balloons can do this
[12:31] <daveake> indeed
[12:31] <Darkside> cuddykid: i really can't be arsed cleaning it up
[12:31] <jcoxon> yay 40+
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[12:31] <Darkside> it works at it is
[12:31] <Upu> was beginning to think 39k was it
[12:31] <Upu> this is a new one I think Steve
[12:32] <Upu> the one this morning as an old batch
[12:32] <Upu> ~ year old
[12:32] <daveake> equal =8
[12:32] <cuddykid> Darkside: I don't mind looking through messy code :P but if you don't want to upload it that's fine
[12:32] <Hiena> RocketBoy: I tend to use high resistance, nitrocellulose coated nichrome spirals whre the pyrogen wire ratio at least 1:1 or 1,5:1. We had lot of headache with a standard 12V fuses and a long wires. Also the standard fuses has a longer delay.
[12:32] <daveake> slowing down
[12:32] <Upu> yeah
[12:32] <daveake> stretch stretch
[12:33] <qyon> dragon just hit it
[12:33] <qyon> :/
[12:33] <Upu> and listeners dropped
[12:33] <sq5cjz> odpalil
[12:33] <Upu> boom
[12:33] <Darkside> there it gos
[12:33] <Darkside> goes
[12:33] <Upu> 8th
[12:33] <Upu> not back
[12:33] <Upu> bad
[12:33] <daveake> not bad
[12:33] <daveake> Interesting it was one reading at 2m/s then pop
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[12:33] <qyon> sq5cjz ano odpalil
[12:33] <Lunar_Lander> hello
[12:34] Nick change: qyon -> sq5rwu
[12:34] <Lunar_Lander> dave, got some carbon and metal film resistors all around from 3.9 to 5.1 ohms from the store
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[12:34] <Lunar_Lander> so testing can begin :)
[12:34] <Lunar_Lander> hi RocketBoy
[12:34] <Hiena> The HV ignition systems works as the charm on the ground even with a loose, wet cableing and with idiots, whom wires the fuses to the 12V battery.
[12:34] <Lunar_Lander> how are your flights for this weekend going?
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[12:36] <Lunar_Lander> wow Tom made it across 42 km
[12:37] <RocketBoy> can t go in the UKHAS records - its not in the UK?
[12:37] <Lunar_Lander> yea
[12:37] <Lunar_Lander> but the ARHAB list?
[12:37] <Lunar_Lander> if he signed up
[12:37] <Darkside> cuddykid: im working on putting this stuff on github
[12:38] <Lunar_Lander> as I said steve, I was at my local store and picked up a selection of resistors
[12:38] <Lunar_Lander> I am excited to test them out
[12:38] <Lunar_Lander> will get a reel of Dyneema from ebay too
[12:38] <Upu> Well RocketBoy I don't think they are just UK records any more
[12:38] <Upu> we have an aussie in there
[12:38] <Lunar_Lander> hi anthony
[12:38] <Lunar_Lander> good point :P
[12:38] <cuddykid> Darkside: cool, the only bit that's uncertain for me atm is decoding the rtty received, but I haven't played about with it yet - hope to have a look in the next few weeks
[12:38] <Darkside> cuddykid: eh?
[12:38] <Darkside> i dont use rtty on the uplink
[12:38] <cuddykid> ah
[12:39] <cuddykid> what do you use?
[12:39] <Lunar_Lander> yea he said he has trained a team of pidgeons
[12:39] <RocketBoy> yeah - but it was set in the uk
[12:39] <Lunar_Lander> :)
[12:39] <Darkside> i use recorded packets, played back using an amateur radio
[12:39] <Lunar_Lander> RocketBoy, but as I said isn't there also that world record list?
[12:40] <Upu> see where you're coming from
[12:40] <Upu> he registered it with ARHAB anyway
[12:40] <Upu> I've always seen that list as UKHAS launches which this one was
[12:40] <Lunar_Lander> Upu, yea the ARHAB is that world record list, right?
[12:40] <Lunar_Lander> where the americans are on and so on
[12:41] <RocketBoy> there is a arhab (Amateur Radio HAB) list - but are the UK flights amateur radio
[12:41] <Lunar_Lander> well there are british flights on that list as far as I know
[12:42] <Lunar_Lander> XABEN is second on the ARHAB Highest Altitude list
[12:42] <Lunar_Lander> and bello mondo has the world record
[12:42] <RocketBoy> yeah - but I'm a radio amateur
[12:42] <Lunar_Lander> yea
[12:43] <RocketBoy> and other may not be
[12:43] <Lunar_Lander> I can see you, Upu, daveake and Michael in the top seven
[12:43] <Lunar_Lander> yea
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[12:43] <RocketBoy> MONDO != M0NDO
[12:44] <Lunar_Lander> yea
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[12:44] <chrisstubbs> RocketBoy, should bwe just head to the coords given on the predictor for elsworth tommorow? :)
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[12:45] <RocketBoy> i'll send some directions chris
[12:45] <Darkside> cuddykid: https://github.com/darksidelemm/osiris
[12:45] <chrisstubbs> Great thank you
[12:45] <cuddykid> Darkside: cheers :)
[12:47] <Laurenceb_> http://www.medphys.ucl.ac.uk/~jem/
[12:47] <Laurenceb_> this page isn't at all scary
[12:48] <Darkside> cuddykid: right
[12:48] <Darkside> the osiris code and the 'ground station' code is there
[12:49] <Darkside> iv'e used the ground station code, running on one of the UKHAS badges, to trigger payloads before
[12:49] <Darkside> but i needed a poweramp on the output of it
[12:49] <Darkside> normally what i do is use the ground station code to transmit a packet, and record that packet with a SSB radio
[12:49] <Darkside> then play that packet back
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[12:49] <cuddykid> ah, I see, sounds a good plan
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[12:51] <Lunar_Lander> RocketBoy, one last question on the demo video: does it matter how thick the dyneema is?
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[12:52] <RocketBoy> well yes - clearly it won't work if the dyneema is 5mm thick
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[12:52] <Lunar_Lander> OK
[12:52] <Lunar_Lander> what thickness do you use?
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[12:52] <RocketBoy> Anyways - that dyneema is about 100lb breaking strain
[12:53] <Lunar_Lander> yea
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[12:53] <RocketBoy> I've sent you some and some resistors in the post
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[12:53] <Lunar_Lander> cool, awesome!
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[12:54] <WILLdude> Hello.
[12:54] <WILLdude> chrisstubbs: Done much with the robot arm?
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[12:55] <Lunar_Lander> thank you RocketBoy
[12:55] <Lunar_Lander> when we are done with the weights and measures for flight 2, there surely will be another balloon order for you :)
[12:56] <RocketBoy> :-)
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[12:59] <Lunar_Lander> my local store also had a selection of carbon and metal film resistor of the correct range
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[12:59] <Lunar_Lander> but they were 1/3 and 0.6 W respectively
[13:00] <RocketBoy> the mf40 (Metal film 0.4W) ones I've sent are very small
[13:01] <RocketBoy> and stand being cooked
[13:01] <RocketBoy> bbl
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[13:03] <Lunar_Lander> thanks :)
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[13:06] <Darkside> cuddykid: https://github.com/darksidelemm/osiris/blob/master/README.md
[13:08] <cuddykid> awesome, thanks Darkside
[13:10] <Darkside> no probs
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[13:10] <Darkside> the ground station code should run nicely on one of the badges, but you'll ned to wire up something to the UART lines to control it
[13:10] <Lunar_Lander> Darkside, looks nice
[13:11] <Lunar_Lander> so you can actually tell it how to actuate the cutdown
[13:11] <Darkside> yes
[13:11] <Darkside> i can tell it how long to fire the FET for too
[13:11] <Darkside> which is useful
[13:11] <Darkside> i usually run it for 4 seconds
[13:11] <Darkside> works pretty well
[13:11] <Laurenceb_> http://deepmac.jedimercer.com/details.php?macadd=001C85&numresults=10
[13:11] <Darkside> as in, i've never had it not cutdown
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[13:12] <Lunar_Lander> yea
[13:12] <Lunar_Lander> :)
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[13:12] <Lunar_Lander> so you basically use the system I used as well
[13:12] <Lunar_Lander> battery, MOSFET, microcontroller wired to MOSFET
[13:12] <Darkside> yes
[13:12] <Lunar_Lander> ah
[13:12] <Darkside> didn't you base it off my system anyway?
[13:12] <Lunar_Lander> yea
[13:13] <Lunar_Lander> thanks again for the photo of the setup :)
[13:13] <Lunar_Lander> hm hope S_Mark comes back, got a question for him
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[13:23] <paultech> http://i.imgur.com/LEmdQiy.png Made some good progress on my ground station software
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[13:23] <Darkside> woah
[13:23] <Darkside> ncurses?
[13:23] <paultech> yep, python bindings
[13:24] <Darkside> noice
[13:24] <Darkside> you're sending back a fair bit of data
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[13:24] <Darkside> that all coming back down via rtty?
[13:24] <Darkside> or something else
[13:24] <Darkside> oh wait, 9600
[13:24] <paultech> 900Mhz band - havent flight tested yet
[13:25] <Darkside> ahh
[13:25] <Darkside> which transmitters?
[13:25] <Darkside> RFD900s?
[13:25] <Darkside> or whatever they are called
[13:25] <paultech> xtend from digi - Heard mixed reviews on them
[13:25] <Darkside> ahh ok
[13:25] <Darkside> yeah they are damn expensive for what they are
[13:25] <Darkside> RFD900s are cheaper and better, from what i've heard
[13:26] <Darkside> http://rfdesign.com.au/index.php/rfd900
[13:26] <Darkside> those have been flown in a HAB application, and worked fine
[13:26] <Darkside> (with suitable gain antennas on the ground)
[13:26] <Laurenceb_> http://www.meas-spec.com/piezo-film-sensors/piezo-film-sheets.aspx
[13:26] <Laurenceb_> ^interesting
[13:27] <paultech> Just pulled that up myself - I haven't yet purchased the xtend and I designed the small binary protocol to be obviously agnostic to the radio - Will do some research on those thanks
[13:27] <Darkside> paultech: they run open source firmware called SiK
[13:27] <Darkside> that firmware isnt completely content-agnostic
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[13:27] <Darkside> if you use MavLink frames it'll do nice things with them
[13:27] <Darkside> but it can still act as a transparent serial pipe too
[13:28] <Darkside> but yeah, the moduels are about half the price of the XTends
[13:28] <Darkside> and if you really need that much data through, then they'd work well
[13:28] <Darkside> if you don't really need thatmuch throughput, then i'd probably suggest using lower bitrate RTTY
[13:29] <Darkside> as its a crapload more reliable
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[13:29] <paultech> Got some reading to do then! No problem with being encapsulated in framing as the protocol is very compact in nature
[13:29] <Darkside> mm
[13:29] <Darkside> i mean, you could send it down as 8-bit rtty and demodulate it with dl-fldigi if you wanted to
[13:30] <paultech> I plan to transmit image data at certain points if possible - Still designing that aspect
[13:30] <Darkside> SSDV
[13:30] <Darkside> already been done, and already supported in dl-fldigi
[13:30] <Darkside> http://ukhas.org.uk/guides:ssdv
[13:32] <paultech> Thanks for the info, lots of new material to read up on. I've done research into SSTV so glad to see this step was done already
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[14:32] <SP9UOB_Tom> evening ALL
[14:32] <jcoxon> hey SP9UOB_Tom congratulations on the flights
[14:32] <SP9UOB_Tom> SEBA-1 recovered by SP9IWP, SQ9CNN, SQ9ODL : http://sp9uob.verox.pl/SEBA-1/seba-1-found.jpg
[14:32] <SP9UOB_Tom> jcoxon: thanks :-)
[14:34] <Upu> Colour APPROVED
[14:34] <SP9UOB_Tom> UPU :-))
[14:34] <Upu> twisty :)
[14:36] <WILLdude> Hi Upu.
[14:36] <Upu> hi Will
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[15:03] <SP9UOB_Tom> SEBA 2 is in the swamp :-(
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[15:05] <Upu> not good :/
[15:06] <SP9UOB_Tom> we try to recover it tommorow
[15:08] <griffonbot> Received email: David Akerman "[UKHAS] Dressed To Chill"
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[15:08] <SP9UOB_Tom> anyway MPL3115A2 is not really good over 32828m
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[15:21] <RocketBoy> do you mean 21828ft ? - 20pa is more like that
[15:21] <RocketBoy> 20KPa
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[15:22] <SP9UOB_Tom> RocketBoy: 107703.412 ft
[15:22] <RocketBoy> the speck says 20KPa
[15:22] <RocketBoy> spec
[15:22] <RocketBoy> thats about 32Kft
[15:23] <SP9UOB_Tom> RocketBoy: i know, but HP03SA works mut petter (also over spec)
[15:23] <SP9UOB_Tom> better
[15:23] <SP9UOB_Tom> RocketBoy: i know, but HP03SA works much better (also over spec)
[15:23] <SP9UOB_Tom> sorry :-)
[15:24] <RocketBoy> Sure - lots of them work beyond their spec - they just get more inaccurate
[15:25] <RocketBoy> I had reasonably good match to expected pressure out of a BMP085 too
[15:26] <M1AFY> anyone know if XABEN49 is happening today?
[15:28] <eroomde> the mailing list seems to
[15:28] <RocketBoy> no - its delayed to tomorrow
[15:29] <RocketBoy> i sent an UKHAS email out this morning
[15:29] <eroomde> https://groups.google.com/forum/?fromgroups=#!topic/ukhas/lgHufvseeBE
[15:29] <RocketBoy> the current calendar now has it as tomorrow
[15:30] <RocketBoy> email sent to UKHAS group at 7:55 this morning and it came back to me
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[15:31] <M1AFY> Cheers RocketBoy
[15:32] <RocketBoy> should be going up tomorrow afternoon
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[15:33] <Toom> Hello, Today flying balloon in UK?
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[15:35] <daveake> no none today
[15:36] <Toom> ok . Thanks
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[15:41] <Geoff-G8DHE> <SP9UOB_Tom> Object movie of the flight path this morning for SP9UOB callsign http://360.g8dhe.net/hab_flights/SP9UOB-20130504/SP9UOB.html
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[15:42] <cuddykid> about ready to test the pyro cutdown :)
[15:43] <Babs> *nottingham ducks
[15:43] <cuddykid> *worcester ducks :P
[15:43] <Babs> *london holds hands over ears
[15:44] Action: Geoff-G8DHE Worthing ducks as well
[15:44] <SP9UOB_Tom> Geoff-G8DHE: thanks L0(
[15:44] <SP9UOB_Tom> Geoff-G8DHE: thanks :-)
[15:44] <Babs> *County Derry calls everyone amateurs
[15:44] <eroomde> nottingham duck - a euphemism for when people collapse after a drive-by shooting?
[15:44] <Geoff-G8DHE> I'll do the other one in a mo
[15:44] <cuddykid> lol
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[16:02] <Geoff-G8DHE> <SP9UOB_Tom> Object movie of both flights looks better all on one image I think ? http://360.g8dhe.net/hab_flights/SP9UOB-20130504/SP9UOBFlights.html
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[16:03] <daveake> Ah Nottingham. Only place I've been to where McDonalds has bouncers.
[16:04] <Laurenceb_> lolz
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[16:06] <cuddykid> yes, there's even bouncers outside wetherspoons pub during the day :)
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[16:08] <Laurenceb_> once when i was in Oxford there was a street fight between rival groups of bouncers
[16:08] <daveake> classy
[16:10] <eroomde> http://www.bienpublic.com/edition-de-beaune/2013/05/04/savigny-les-beaune-entreprises-et-maisons-inondees#jimage=8744177E-8A4D-40A6-9D92-20524A9D2F60
[16:10] <eroomde> that's out house
[16:10] <eroomde> our*
[16:10] <daveake> Nice riverside location :p
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[16:11] <eroomde> the cellar is still rogered
[16:11] <eroomde> but the sun is out noiw
[16:11] <Laurenceb_> think of your cheese
[16:11] <eroomde> and is due to be for 4 or 5 days, which hopefully might have some impact on drainage
[16:11] <Laurenceb_> is there enough water still there for you to surrender to?
[16:14] <eroomde> suspect lots of it is still up in the hills, working its way down
[16:14] <eroomde> we're down where a valley meets the plane
[16:14] <eroomde> which is unideal from a flood pov
[16:15] <eroomde> not that it has ever flooded in the last 65 years, apparently
[16:15] <Laurenceb_> well if its bad you can still eat cake right?
[16:16] <eroomde> brioche
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[16:16] <eroomde> but english are not good at translating other languages
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[16:33] <cuddykid> am I right in thinking that 3AAs should be suitable for firing pyro? Can't get the thing to fire
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[16:37] <Lunar_Lander> hello again
[16:45] <RocketBoy> daveake: your phone just rang me :-)
[16:47] <Lunar_Lander> xD
[16:47] <Lunar_Lander> without him doing anything?
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[16:54] <SP9UOB_Tom> LOL i was live in TVN24 (main Polish news station :-))
[16:54] <Lunar_Lander> SP9UOB_Tom, cool
[16:54] <Lunar_Lander> how was it?
[16:54] <SP9UOB_Tom> Lunar_Lander: cool :-)
[16:54] <Lunar_Lander> :)
[16:55] <Lunar_Lander> did you find the balloons of today?
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[16:56] <SP9UOB_Tom> Lunar_Lander: yes, but one is stil not recovered - in the middle of the swamp
[16:56] <Lunar_Lander> ah
[16:56] <Lunar_Lander> was it the record one?
[16:58] <SP9UOB_Tom> Lunar_Lander: yup
[16:58] <Lunar_Lander> oh
[16:58] <SP9UOB_Tom> ok time to go now
[16:58] <SP9UOB_Tom> bye all
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[17:02] <cuddykid> wow, 6 AAs did the trick& they make one loud bang!
[17:02] <cuddykid> set all the dogs off round here
[17:03] <Lunar_Lander> what did you try?
[17:03] <cuddykid> pyro cutdown
[17:03] <cuddykid> incredible
[17:03] <Lunar_Lander> ah
[17:03] <daveake> RocketBoy - ooops sorry!
[17:04] <daveake> I wondered why your number was at the top when I called someone else after :p
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[17:07] <cuddykid> http://www.youtube.com/watch?v=E0C55BfVFcA
[17:08] <cuddykid> incredibly blurry as iPhone wasn't focused for some reason
[17:10] <RocketBoy> seems a bit OTT
[17:11] <RocketBoy> think pop
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[17:11] <Babs> There's a small hint of a mushroom cloud there
[17:11] <Babs> excellent
[17:12] <cuddykid> RocketBoy: less powder next time?
[17:12] <cuddykid> there was hardly any in this one
[17:12] <RocketBoy> id say so
[17:12] <Babs> what length of acrylic rod did you use to pack it?
[17:12] <RocketBoy> you harpy need any
[17:13] <cuddykid> about 4cm Babs - with the epoxy in both ends, came to around 1cm max of pyro
[17:13] <RocketBoy> in fact the tube will normally go with just that of the igniter
[17:13] <cuddykid> ah right
[17:13] <cuddykid> it was quite a thick walled tube so wasn't sure exactly what was required
[17:14] <RocketBoy> before you all rush off making them you might like to read the explosives act and work out what an "act of manufacture" is
[17:14] <Babs> cuddykid - on that basis yours were identical to mine I think. http://www.flickr.com/photos/91049302@N00/8462672066/in/photostream/ mine had a bit of a bang too
[17:14] <Babs> ordering detonators, explosive powder and packing tubes on the internet
[17:14] <Lunar_Lander> RocketBoy, I guess making a pyro cutdown is one?
[17:14] <Babs> what could possibly go wrong?
[17:15] <RocketBoy> mmmm H2
[17:15] <cuddykid> that looks like a lot of powder Babs!
[17:15] <RocketBoy> fragments of plastic in the eye
[17:15] <Upu> yeah I wouldn't use them
[17:15] <Babs> let me upload mine, 2 secs
[17:15] <RocketBoy> id certainly be wearing goggles
[17:15] <cuddykid> seem to be the only reliable separation mechanism though
[17:16] <cuddykid> yup, I was
[17:16] <daveake> separation of fingers from hands?
[17:16] <cuddykid> :)
[17:16] <RocketBoy> I've also have them go off unexpectly
[17:16] <daveake> Take spare pants
[17:17] <RocketBoy> when the cutdown timer expired after a huge amount of pre launch faffing
[17:17] <daveake> oops
[17:17] <cuddykid> Babs - mine before it was destroyed - https://twitter.com/adamcudworth/status/330710351802925056/photo/1
[17:18] <RocketBoy> its all very similar to the separation charges used by the rocketry boys
[17:19] <RocketBoy> I asked UKRA to let me know the legislation that made it legal to make them
[17:19] <RocketBoy> I'm still waiting
[17:19] <daveake> hah
[17:20] <Babs> I've taken out a patent on using potatoes as a payload substitute. Don't even think about ripping my idea off. http://www.flickr.com/photos/91049302@N00/8708114860/in/photostream
[17:20] <Babs> cuddykid - i think we were following identical plans
[17:20] <cuddykid> yeah, rob harrison's design
[17:20] <Babs> exactly
[17:21] <daveake> You could power the tracker from the potatoes too
[17:21] <daveake> You might want to test that in the freezer first, mind :)
[17:21] <cuddykid> nichrome cut downs are such a nuisance/unreliable
[17:21] <WILLdude> Why is it so hard to make bitcoins without mining? Urgh.
[17:22] <WILLdude> Anyway, how's stuff guys?
[17:22] <Babs> i have some code that has a bunch of failsafes : no fire unless above a pre set altitude, no fire unless satellite lock, no fire unless min number of satellites, no fire unless there are X number of consecutive readings outside of a preset geofence etc.
[17:22] <cuddykid> yeah, I'll be doing that - but still, if a bug pops up.. :P
[17:22] <Babs> haven't yet tested it though and given the quality of my coding i would rely on yours more......
[17:22] <cuddykid> I'll be keeping it well away from the H2 balloon
[17:23] <cuddykid> well, actually, the next flight won't be using it between balloon - parachute, it will be using it to separate payload from another payload, so well away
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[17:23] <Babs> happy to share though if you want to have a look at it. the coding will be amateurish but the general structure would be nice to get a second opinion on it
[17:23] <Lunar_Lander> yea
[17:23] <Lunar_Lander> I had my cutdown look for GPS lock and altitude
[17:24] <Babs> daveake - a potato powered tracker is the way forward
[17:24] <Lunar_Lander> xD!
[17:24] <Babs> its innovation that keeps this hobby alive
[17:24] <Lunar_Lander> Babs, Portal 2 reference :)?
[17:24] <daveake> brb I have to fill in a patent application
[17:24] <Babs> Lunar_Lander - no. I'm not allowed a console. Although Portal does look excellent.
[17:25] <Lunar_Lander> ah
[17:25] <Lunar_Lander> portal is also for PC
[17:25] <Lunar_Lander> :)
[17:25] <Babs> I mean of course I could have a console, its just that my fiance and I discussed me getting one.
[17:25] <Lunar_Lander> yea
[17:25] <Babs> I put my opinion across.
[17:25] <Babs> She put her opinion across.
[17:25] <Babs> and we jointly decided she was right.
[17:25] <Babs> It is a common theme.
[17:25] <daveake> That sounds so familiar
[17:26] <Lunar_Lander> yea
[17:26] <Lunar_Lander> portal is also for PC
[17:27] <Babs> I'm joking, she is more of a gamer than me.
[17:27] <Lunar_Lander> xD
[17:27] <RocketBoy> cuddykid: if your running wires between the payload box and the cutdown above the chute - you might want to consider what will happen if it comes down across a power line
[17:27] <Babs> But if I spend any more time with my head in a computer that wedding deposit is going up the swanny
[17:28] <RocketBoy> and what would happen if someone found it and tried to pull it down
[17:28] <cuddykid> similar situation if a balloon still had H2 in
[17:31] <RocketBoy> in the 40+ flights I've done flights I've done 2 have ended up in power lines
[17:33] <Babs> Its time to find a new launch site rocketboy ;-) http://2.bp.blogspot.com/-m65x12G8Hi4/UCLEFwDIA7I/AAAAAAAAFEA/4QIhp2UosgE/s1600/sea_of_power_lines_sf_520c.jpg
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[17:39] <WILLdude> Urgh. Waiting for female-male jumper wires to arrive so I can't use my new relay board.
[17:47] <WILLdude> I'm trying to figure some amazin DIY way to do it.
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[18:01] <eroomde> bodges are bad news for cables and connectors
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[18:02] <daveake> Yep. CHanges "most likely point of failure" to "definitely won't work"
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[18:12] <SpeedEvil> or just solder it
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[18:40] <eroomde> the mayor just came to visit
[18:41] <daveake> by helicopter?
[18:41] <eroomde> may or may not have anything to do with the comments in the local newspaper website wonderwhy the mayor is no where to be seen since the flooding
[18:41] <eroomde> gotta love village politics
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[18:42] <eroomde> 'Pas de maire, pas de conseiller génèral, pas de deputè....................Ils sont ou..................Encore dans une manif contre la mariage gai ou pas !'
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[18:43] <eroomde> no mayor, no councellor general, no deputy ... where are they ... something about probably still opposiing gay marriage somewhere else
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[18:43] <eroomde> newspaper website comments seem to be universal
[18:47] <chrisstubbs> Im starting to get the hang of soldering these ublox chips
[18:48] <eroomde> are you doing a production run or is there one poor chip getting all the torture?
[18:48] <chrisstubbs> haha
[18:49] <chrisstubbs> just the one :P
[18:49] <chrisstubbs> doing a little usb breakout board for the NEO6
[18:49] <chrisstubbs> i have a question for you actually eroomde
[18:51] <chrisstubbs> do you use micro sd cards on the data logging boards you design?
[18:51] <eroomde> have done in the past yep
[18:52] <chrisstubbs> Do you need any other components to interface it with a 3.3v arduino?
[18:52] <chrisstubbs> or does it just connect straight to the SPI?
[18:52] <eroomde> just straight to spi
[18:53] <eroomde> add a doucling cap acroass its ground pins
[18:53] <eroomde> decoupling*
[18:53] <eroomde> that's about it
[18:53] <chrisstubbs> Great!
[18:53] <chrisstubbs> cheers :)
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[18:54] <Lunar_Lander> hi OZ1SKY_Brian
[18:54] <Lunar_Lander> and chrisstubbs
[18:55] <chrisstubbs> Hi Lunar_Lander
[18:58] <Lunar_Lander> how are you?
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[19:00] <chrisstubbs> pretty good thanks, been having a good clearout of all my old c*** today#
[19:00] <Lunar_Lander> ah
[19:00] <chrisstubbs> etched and now putting together my ubox USB breakout board
[19:00] <OZ1SKY_Brian> hi lunar and all
[19:01] <Lunar_Lander> how are you in Denmark :)?
[19:02] <OZ1SKY_Brian> well.... my frinds house burned down during the night and i got water comming out of the antenna cables. Ive been better. u?
[19:02] <Lunar_Lander> oh
[19:03] <Lunar_Lander> yea recovering from surgery on my back
[19:03] <OZ1SKY_Brian> oh ok so you see better days as well
[19:03] <Lunar_Lander> yea
[19:04] <eroomde> hope nothing too serious Lunar_Lander ?
[19:04] <Lunar_Lander> no, an inflammation was removed
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[19:49] <Babs> Adam - try a 9V cell to blow the pyro. No capacity in the battery but if you are using it to blow the pyro it only needs to be used once. Lighter than the arrangement on your vid.
[19:50] <Babs> Link the arduino circuit to an opto coupler, then use the optocoupler in series with the 9V cell and the pyro and I've found that works well.
[19:50] <costyn> evening all
[19:51] <costyn> did SP9UOB really reach 42650m today?
[19:51] <natrium42> the altitude graph checks out
[19:52] <costyn> very impressive
[19:52] <natrium42> indeed
[19:54] <chrisstubbs> arse, theres a short on the board :( right under the ublox
[19:55] <eroomde> involve a fet somewhere
[19:55] <eroomde> that poor ublox
[19:56] <mattbrejza> i think chrisstubbs just needs a better iron...
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[19:57] <chrisstubbs> Its my obsession with self etched boards
[19:57] <chrisstubbs> i try to do it all on one layer and end up running tracked under the ublox, and they short onto the vias on the underside of it
[19:57] <mattbrejza> oh whoops
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[19:59] <eroomde> pcbs are cheap to get made
[19:59] <eroomde> do yourself a favour
[19:59] <mattbrejza> especially when you keep blowing ubloxes
[19:59] <eroomde> + 2 layers allow much much better emi robustness than 1
[20:01] <chrisstubbs> time to go and heat gun it off :P
[20:01] <eroomde> maybe stab it with a screwdriver, jump up and down on it and set fire to it
[20:02] <chrisstubbs> Yeah that could work ;)
[20:02] <eroomde> it'll end up that way anyway, this'll save you the time
[20:02] <chrisstubbs> had to get rid of a load of foam today, tried melting it with a blowtorch, disolving it in petrol. nothing would get rid of it
[20:02] <chrisstubbs> ended up running it over with a 4x4 to squash it and it just sprang back
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[20:03] <eroomde> nice
[20:04] <mattbrejza> hmm making really small tracker pcbs has one problem
[20:04] <mattbrejza> ive lost it...
[20:07] <eroomde> but where is the pcb?
[20:09] <mattbrejza> well somewhere in my tip of a room
[20:09] <mattbrejza> but thats not very useful atm
[20:10] <eroomde> did you leave it on?
[20:10] <eroomde> and so can the ps tell you?
[20:10] <eroomde> gps*
[20:10] <mattbrejza> na, but i have found the battery pack i was using for it so its not far away
[20:11] <Babs> I lost my itrent battery. How I can lose so much stuff in a flat is beyond me.
[20:12] <Babs> I expect when I move out I will just find a whole room that i have forgotten about with all the stuff I have lost over the last 5 years in it.
[20:12] <Babs> I can't wait to see my Bigtrak again
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[20:55] <chrisstubbs> What does a yellow cross over a via in eagle mean?
[20:56] <eroomde> hit f8 it should go
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[20:56] <chrisstubbs> nope
[20:56] <eroomde> it means u probs had 2 ontop of each other but just ripped one up
[20:56] <eroomde> hit ratsnest rather than f8
[20:56] <chrisstubbs> still there
[20:56] <eroomde> that might be my custom mapping
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[20:57] <chrisstubbs> just to be sure im not making a noob mistake...
[20:57] <chrisstubbs> place a via, route from top side component to via, then route from bottom side component to via
[20:58] <chrisstubbs> is that the right way?
[20:58] <eroomde> no
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[20:58] <chrisstubbs> ah thats probably where im going wrong then
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[20:59] <eroomde> rout from top pin to where you want via, click middle mouse button, the route along bottom
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[21:00] <chrisstubbs> ah perfect, cheers :)
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[21:30] <chrisstubbs> eroomde, mind if i ask another eagle question?
[21:32] <chrisstubbs> Ah awesome fixed it, nevermind :)
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[21:42] <Laurenceb_> https://fbcdn-sphotos-e-a.akamaihd.net/hphotos-ak-frc1/p480x480/420759_220617531396099_1418285304_n.jpg
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[21:48] <arko> ahh the weather is cooling down
[21:51] <Lunar_Lander> that sounds good
[21:51] <Lunar_Lander> arko, did you hear of the scrubbed Vega launch tonight?
[21:51] <Lunar_Lander> they postponed due to weather
[21:52] <arko> oh i did not
[21:52] <arko> this is neat http://vimeo.com/63653873#
[21:52] <Lunar_Lander> yea
[21:54] <jcoxon> evening all
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[21:55] <Lunar_Lander> xD
[21:55] <arko> sup jcoxon!
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[21:56] <Lunar_Lander> he disconnected
[21:56] <arko> ah crap
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[21:59] <arko> http://hyperlapse.tllabs.io/#
[21:59] <arko> very cool
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[22:04] <anerDev> hi !
[22:04] <arko> hallo
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[22:16] <Willdude123> Hello.
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[22:23] <Willdude123> How are things people?
[22:23] <Willdude123> .
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[22:23] <arko> good?
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[22:25] <chrisstubbs> Ok, and you WILLdude?
[22:25] <Willdude123> Once I've finished my arduino controlled lamp project, I'm gonna get the UBLOX out again.
[22:26] <arko> oh nice
[22:26] <arko> what are you using to control the lamp?
[22:26] <chrisstubbs> internet lamp?
[22:26] <Willdude123> Yeah
[22:27] <chrisstubbs> Cool
[22:27] <Upu> today a lamp. tomorrow a robot
[22:27] <arko> ^
[22:27] <chrisstubbs> eroomde, on the note of microSD cards, do you have a socket you can reccomend (with an eagle lib)?
[22:27] <Willdude123> Uhuh.
[22:27] <Willdude123> Where were you Upu btw?
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[22:27] <Upu> when ?
[22:28] <Willdude123> You were away for a week or so, a few days ago.
[22:28] <Willdude123> I think.
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[22:28] <Upu> yup
[22:28] <Upu> High Wray in the Lakes
[22:29] <Upu> this cottage to be exact : http://goo.gl/maps/cfhc4
[22:30] <Willdude123> That looks very nice.
[22:30] <Upu> it was
[22:30] <Willdude123> We missed you.
[22:30] <Upu> why thank you :)
[22:31] <Willdude123> Not much has happened though.
[22:31] <Willdude123> We aren't all dead.
[22:31] <Upu> Well a few launches tomorrow I think
[22:31] <Willdude123> We survived, just about
[22:32] <Willdude123> Doubt they'll be any near me.
[22:32] <Upu> well they would be recievable
[22:32] <Upu> if antenna was on roof
[22:33] <Willdude123> All that's happened with me in the past week or so is my parents won't let me build a pc, even though I have the money of even buy a new one.
[22:33] <Willdude123> *or
[22:33] <Willdude123> My laptop is a bit rubbish.
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[22:35] <Willdude123> chrisstubbs: I asked you this recently but I wasn't around to see the reply. How's the robot arm going?
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[22:36] <chrisstubbs> Willdude123 away back in the cupboard at the moment :(
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[22:36] <Willdude123> Lol
[22:36] <chrisstubbs> Did you buy the maplin one?
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[22:38] <Willdude123> Nah,.
[22:38] <Willdude123> Haven't had time.
[22:38] <Willdude123> I didn't initially because I thought my idiotic parents would actually let me build a pc.
[22:38] <Willdude123> So I was saving.
[22:39] <Willdude123> Upu: You ever built a PC?
[22:39] <Upu> one or two
[22:39] <Upu> my company was built up on building PC's
[22:40] <Upu> don't bother these days
[22:40] <arko> hah, man those were the days, same here
[22:40] <Upu> well apart from my own PC
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[22:40] <Upu> unless you want something special its easier just buy a Dell or a HP
[22:41] <Upu> however anything +SSD = win
[22:41] <Willdude123> I could get quite a good deal for £534 with a quad core amd fx series and a 7870
[22:41] <arko> i wonder if any pc cases today are still sold with "Turbo" buttons for old times sake
[22:41] <Willdude123> Then I looked at a (built) one for the same price, which had less spec.
[22:41] <Willdude123> Still answered npw.
[22:42] <Willdude123> *no
[22:42] <Willdude123> Upu: Anywhere I can get a 450 ish PC?
[22:42] <Willdude123> *decent
[22:42] <Upu> www.ebuyer.com
[22:43] <arko> does the uk have newegg?
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[22:43] <Upu> yeah but ebuyer is where its at for cheap comps
[22:43] <arko> ah
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[22:46] <Willdude123> Hmm.
[22:47] <Willdude123> I want a reasonably good graphics card, like a 7870
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[22:47] <Willdude123> Strangely, when I wanted a £1000 mac, they let me save up for one.
[22:47] <Upu> £1000...
[22:47] Action: Upu face palm
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[22:48] <arko> a mac?
[22:49] <arko> oddly enough i switched from a mac to pc, turns out apple doesnt have real usb controllers
[22:49] <arko> they are emulated
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[22:49] <arko> my debugger kept kernel panic'ing my mac, so when i got a pc everything Just Worked (tm)
[22:49] <arko> good times
[22:50] <arko> Willdude123: thats a pretty sweet graphics card
[22:51] <Willdude123> Ikr
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[22:51] <arko> the 600 series nvidias aren't too shabby either
[22:51] <arko> i assume you want it for gaming?
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[22:55] <arko> eh, now days CAD is what kills my graphics card.. how times have changed
[22:57] <chrisstubbs> Right im off!
[22:58] <chrisstubbs> better get up early tommorow and get things in order. Should be launching some time after 12
[22:58] <arko> good luck!
[22:58] <chrisstubbs> Cheers man :)
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[22:59] <arko> Upu: are you waiting on any more info from me about UKHAS con?
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[23:06] <Willdude123> Hi.
[23:06] <Willdude123> Urgh.
[23:06] <Willdude123> I'm bored with life.
[23:07] <Willdude123> Which is kinda why I want a new PC
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[23:11] <Darkside> ok i need to remove SP9UOB from the tracker
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[23:18] <arko> Willdude123: what are you using to control that lamp project? relay & arduino?
[23:18] <Willdude123> Relay board.
[23:19] <arko> :) neat
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[23:33] <andy_vk3yt> u there Darkside?
[23:34] <Darkside> yup
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[23:34] <Darkside> andy_vk3yt:
[23:35] <andy_vk3yt> Todd already told you.
[23:35] <andy_vk3yt> Only 100Baud today
[23:35] <Darkside> yup
[23:35] <Darkside> im sitting here waiting for teh APRS trackers to start broadcasting
[23:35] <andy_vk3yt> r u going to try to track?
[23:35] <Darkside> if it gets high enough
[23:36] <andy_vk3yt> cool. should be better than the last time
[23:36] <Darkside> how long until the aprs payload is on?
[23:36] <andy_vk3yt> 1.2g balloon so should be close to 30k
[23:36] <andy_vk3yt> Pretty soon, we are just connecting to the payload
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[23:37] <Darkside> k
[23:37] <andy_vk3yt> Let me check rtty, I think it might be on already
[23:37] <Darkside> if its on noone is receiving it
[23:37] <andy_vk3yt> not yet
[23:39] <Upu> gl with the flights
[23:39] <Upu> night all
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[23:47] <choppyhorse> My microcontroller and radio run off different batteries, but the gps, which is powered through the microcontroller board, sends it data to both sides. Should I tie all the grounds together? Any issue with tying the grounds of these two different battery packs together?
[23:47] <Darkside> tie them together
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[23:49] <arko> not having grounds tied sounds like an easy way to get ground loops :P
[23:50] <qyx_> easy way to receive no data from gps
[23:52] <qyx_> as you need txd & gnd, which implicates connecting the grounds
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[23:58] <drlizau> on site at launch site now
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[23:58] <Darkside> i saw
[23:58] <Darkside> no aprs data from the payload yet
[23:58] <drlizau> preparing for 1020 local launch
[23:58] <arko> is that you Rankins Springs?
[23:58] <Darkside> arko: drlizau and andy_vk3yt are there
[23:58] <drlizau> yes, at rankins springs
[23:59] <arko> :) cool
[23:59] <arko> good luck, i'll be wwatching while working on these lab assignments
[23:59] <arko> \o/ woot
[00:00] --- Sun May 5 2013