highaltitude.log.20130612

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[02:02] <heathkid> hmm
[02:02] Action: heathkid is all alone here tonight?
[02:02] <arko> nah
[02:02] <arko> im here
[02:02] <heathkid> hey arko!
[02:02] <arko> finished laser cutting stuff
[02:03] <heathkid> nice
[02:03] <arko> now it smells like acrylic
[02:03] <heathkid> I found something really awesome today
[02:03] <arko> oh?
[02:03] <heathkid> Vacuum Insulating Panels
[02:03] <heathkid> NOT cheap
[02:03] <heathkid> but read up on wikipedia
[02:03] <heathkid> wow!
[02:04] <heathkid> also can't be cut
[02:04] <heathkid> has to be custom made
[02:04] <heathkid> but the R value is insane for a 25mm thick piece
[02:04] <arko> neat
[02:05] <heathkid> http://en.wikipedia.org/wiki/Vacuum_insulated_panel
[02:06] <heathkid> slightly long paste...
[02:06] <heathkid> Based on a typical k-value of 0.007 W/(m·K), the R-value of a typical 25 mm-thick VIP would be 3.5 m2·K/W (20 h·ft²·°F/BTU). To provide the same R-value, 154 mm of rockwool or 84 mm of rigid polyurethane foam panel would be required.
[02:08] <heathkid> I'll have the name of a manufacturer tomorrow... going to try to get a "sample" to build a 6" cube "Payload Container".
[02:09] <heathkid> or maybe 4" cube (*more* than big enough)
[02:09] <arko> nice
[02:09] <heathkid> but need to figure out the camera port(s)
[02:09] <heathkid> if they can form them or not
[02:09] <heathkid> you can't cut it at all
[02:10] <heathkid> actually with our payload and tracker, a 4" cube would be on the large side giving enough room for some add-ons...
[02:11] <heathkid> I'm testing some new firmware on our tracker
[02:11] <heathkid> has telemetry
[02:11] <heathkid> nice
[02:12] <heathkid> aprs.fi is awesome
[02:12] <heathkid> want to test it on spacenear.us to see if our changes broke the decoding
[02:13] <heathkid> Upu?
[02:13] <heathkid> anyway...
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[02:13] Action: heathkid is talking to himself again
[02:13] <heathkid> arko: what are you working on?
[02:21] <arko> sorry, had to tend to the laser that could potentially burn the place down
[02:21] <arko> its a case for my sdr
[02:21] <arko> http://i.imgur.com/MI4sGE5.jpeg
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[02:29] <heathkid> how powerful is it?
[02:29] <heathkid> I've got several lasers I'm afraid to even power up...
[02:31] <arko> 90W
[02:31] <arko> cant cut metal
[02:32] <arko> yet...
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[02:44] <Darkside> ooh you have a hackrf
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[02:55] <Darkside> arko: how did you get one?
[03:05] <heathkid> 90W?
[03:05] <heathkid> dang...
[03:05] <heathkid> I'm off to sleep... more tomorrow...
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[03:08] <arko> Darkside: toorcon
[03:08] <arko> I'm stuck in an elevator
[03:08] <arko> This is not fun
[03:09] <Darkside> heh
[03:22] <arko> 45 minutes until maintenance arrivea
[03:23] <arko> So we are designing next years layerone badge
[03:23] <arko> In this elevator
[03:23] <arko> ...
[03:24] <Darkside> wait
[03:24] <Darkside> you're stuck in an elevator
[03:24] <Darkside> lol
[03:25] <arko> Yes
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[04:06] <nigelvh> That sucks dude!
[04:29] <arko> im out!
[04:29] <arko> haha
[04:29] <arko> 1 hour
[04:32] <nigelvh> Woot!
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[04:40] <arko> im never taking the elevator here again
[04:40] <arko> i got stuck once
[04:40] <arko> second time is not so much fun
[04:40] <nigelvh> Haha
[04:40] <nigelvh> You've been stuck in that same elevator twice now?!
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[04:40] <arko> yeah
[04:40] <nigelvh> Haha, sounds like a less than ideal elevator...
[04:41] <arko> pos
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[05:24] <Chetic> how do I know what kind of LiPo charger I should get?
[05:24] <Chetic> it's a freakin djungle
[05:25] <Chetic> jungle* (ffs)
[05:37] <Upu> LiPo ?
[05:37] <Upu> no idea not using LiPo on balloon ?
[05:40] <x-f> a simple 1-cell charger probably would be enough
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[05:43] <Chetic> what batteries should I use then?
[05:43] <Chetic> I like it light-weight and complicated rather than heavy and simple :p
[05:43] <x-f> Energizer Ultimate Lithium AA's are generally recommended for HABing
[05:44] <x-f> 14.5g each
[05:44] <Upu> yep those
[05:44] <Chetic> how many mAhs are in those?
[05:45] <Upu> 3000
[05:45] <Chetic> wtf that's tons
[05:45] <Chetic> why am I looking at LiPo
[05:45] <Upu> no idea
[05:45] <Upu> http://ukhas.org.uk/ideas:power_supply
[05:45] <Chetic> thanks for the tip
[05:46] <Chetic> that site is fantastic, I should visit it more
[05:46] <Upu> tbh that page is well hidden
[05:46] <Upu> silly name and sublinked from another page
[05:48] <mfa298> I think there's a few things on the wiki that are hard to find unless you know where to look, although im not really sure how to improve it
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[06:01] <Chetic> mfa298: while I think it's good that there is a sitemap, I don't find it too intuitive
[06:01] <Chetic> and why not an overview of the site that's always visible?
[06:01] <Chetic> at the top maybe
[06:05] <eroomde> the madness of navigating it is part of the charm
[06:07] <Chetic> lol :]
[06:11] <mfa298> There's a lot of useful stuff on there when you look so I'm not sure how you can sensibly provide a useful set of links.
[06:12] <mfa298> I hadn't come accross that power supply page before
[06:12] <Chetic> I'm sure some recategorizing could help a little bit
[06:15] <eroomde> well, it's organic and open and done by volunteers
[06:15] <eroomde> so, if you feel like picking up the banner and leading a cavalry charge :)
[06:18] <Chetic> I'd do it right now if I didn't sit next to my boss at work :D
[06:18] <Chetic> (fml)
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[06:36] <UpuWork> ping Gadget-Mac
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[08:02] <cn8dn> hello please arduino uno +ntx +rrty
[08:02] <cn8dn> link
[08:16] <UpuWork> ping Gadget-Mac GadgetDroid
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[08:26] <Laurenceb_> any git users here?
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[08:30] <G8UVS> yep me
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[08:31] <G8UVS> oh sorry thought you ment old gits!
[08:32] <Laurenceb_> oh nvm, fixed it
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[08:34] Nick change: [2]Geoff-G8DHE -> Geoff-G8DHE_
[08:34] <daveake> I'm an old git using git
[08:36] Nick change: MoALTz_ -> MoALTz
[08:37] <Brace> Laurenceb_: did you fix that samba problem in the end?
[08:38] <Laurenceb_> yes
[08:38] <Laurenceb_> reinstalled samba :P
[08:40] <Brace> I did wonder if you'd try that in the end
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[08:41] <Brace> glad you got it fixed :)
[08:46] <G8UVS> at work my nick name is the old git - as I am the oldest!
[08:48] <GW8RAK> You can't be that old being a G8U :)
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[08:53] <G8UVS> well I was 21 when I sat the exam, that was in 1979 dont ou think I qualify then?
[08:55] <fsphil> everything was blank and white back then wasn't it?
[08:55] <fsphil> or had colour been invented?
[08:56] <GW8RAK> Okay, you've got a couple of years on me. I was 18 when I sat it. You are the official old git. :)
[08:57] <GW8RAK> fsphil, apparently when the BBC went from b&w to colour the camera people got pay rises. And so did the sound men!
[08:57] <fsphil> sneaky
[08:57] <GW8RAK> Colour sound makes all the difference
[08:59] <G8UVS> As I recall we only had 3 TV channels BBC1 BBC2 and Southern, CHannl 4 was yet to came and so was CB what ever that is!
[09:00] <fsphil> wonder if the guys who founded Monster Cables used to work there
[09:01] <fsphil> "the extra information in the colour signal means the flavour of the sound is slightly purple"
[09:01] <fsphil> "we need more money to make it a bit more orange"
[09:01] <G8UVS> and Radio Caroline was about to broadcast from the North sea with Laser 558 only wish I could go back to the 80's
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[09:02] <fsphil> I don't :)
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[09:02] <GW8RAK> The '80's were a very good decade for me.
[09:02] <G8UVS> The future is Bright - the future is ORANGE and who owns them now? wed be 30 years younger!
[09:02] <fsphil> well, maybe take a few lottery tickets with me
[09:05] <Ugi> No lottery in the 80s, but Just remember to buy property in Docklands, shares in Facebook etc..!
[09:05] <GW8RAK> But given the choice would you go back?
[09:05] <Ugi> morning guys!
[09:05] <daveake> Buy some Icelandic bank shares
[09:05] <GW8RAK> Shares in Facebook? In the 80's? Morning
[09:06] <daveake> Invest in Greece
[09:06] <daveake> What could possibly go wrong?
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[09:06] <Ugi> No, I just meant, as you progress. Easier to remember than lottery numbers
[09:08] <GW8RAK> But if you went back with hindsight, you would run into some big decisions to make. Easy to avoid the mistakes, but other good decisions have consequences.
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[09:11] <Ugi> Oh yes, there are plenty of random factors involved. It would be hard just to pick out the best bits of your life and avoid old and new mistakes.
[09:12] <GW8RAK> Very hard. If I went back to 84, would I still marry someone who would die within a few years? The answer is yes I would, not one regret about it.
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[09:20] <G8UVS> I would of seen my wife comming, and left her single, thats for sure, - if one went back with hindsight! what a wonderful operetunity though but could it bring everlasting life I mean could you just go back every 20 years and still be in your 20s?! theres a thought
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[09:34] <gonzo_> if you went back to your 20's you'd then be able to make a whole new raft of cringe-making mistakes all afresh
[09:35] <Babs> Not sure whether this particular TED talk is out yet, but still an interesting article http://www.bbc.co.uk/news/technology-22863447
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[09:54] <costyn> Babs: interesting article
[10:00] <Babs> costyn - did you see the TED talk on autonomous drones from a year ago?
[10:05] <costyn> nope
[10:11] <Babs> its quite cool http://www.ted.com/talks/vijay_kumar_robots_that_fly_and_cooperate.html
[10:12] <Babs> albeit that the majority of the stuff that he shows is controlled via motion capture rather than being truly autonomous
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[10:13] <G8UVS> rather interesting,.. recall the hovercaft first shown off on Isle of wight in 1959, now useful for the rest of us! perhaps drones too can serve peaceful life!
[10:16] <HixWork> have they cancelled the hovercraft service? I think i remember them saying they had but not sure. Remember watching it on the beach as a child. cool
[10:17] <Babs> I made a hovercraft the once out of a polystyrene ceiling tile and the fuselage from a rubber band plane. it was mega.
[10:18] <Babs> http://www.aucm36.dsl.pipex.com/scouts/troop/Meetings/hovercraft.html here we go. mine didn't have a skirt though as I was 8 at the time and my skills were weak.
[10:20] <HixWork> wow still going http://www.hovertravel.co.uk/about-the-hovercraft.php
[10:21] <costyn> Babs: ah yea, that presentation I'd seen
[10:21] <HixWork> Christ. "OK, if you have read, understood the safety warning and accept the risk of injury, ..." such a litigous world we live in these days
[10:21] <costyn> Babs: although very impressive, I'll be really impressed when they can do it without an external frame of reference (those motion capture cameras)
[10:22] <G8UVS> Well I hear them from time to time.. the only hovercraft in Europe is the Portsmouth Ryde ( isle of Wight ) service 10 minutes each way! £16:50 day return for a go!
[10:23] <HixWork> boys do stuff like that and part and parcel of it is you expect a scalpel through a finger or similar. its part of growing up
[10:26] <G8UVS> I wonder make a big version and track it!!
[10:29] <daveake> Babs I remember making hovercraft too when I was a kid. 2 ceiling tiles + plastic bait tin with the bottom cut out + airplane prop + little motor
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[10:35] <HixWork> interesting BBc lik there Babs
[10:35] <HixWork> BBC link
[10:36] <Babs> daveake - what did you use 2 ceiling tiles for? large hovercraft?
[10:36] <daveake> Sandwich
[10:37] <daveake> Top on with round hole same diameter as the prop, and with the round pastic bait tin glued on
[10:37] <daveake> Bottom one was basically a skirt
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[10:39] <Babs> daveake - nice
[10:40] <Babs> on the 1980s theme, the plan that I used was one I wrote off for from a 1980s saturday morning tv show called No. 73. Bizarrely, it was hosted by Sandi Toksvig.
[10:41] <Babs> To bring us back on topic, I'm trying to separate a comma delimited string in the arduino ide using an indexOf(',') command
[10:42] <Babs> I've pulled in the string through the Serial.read() command
[10:42] <Babs> from the IMU]
[10:42] <Babs> IMU
[10:43] <Babs> defining ypr as a char, and using ypr = Serial.read(), indexOf(',') ypr is the correct value
[10:43] <G8UVS> Babs dont forget toi ring Me Andy about the 433Mhz aerial some time !
[10:44] <Babs> however, indexOf(',') returns -1 which indicates that it can't find the comma.
[10:44] <Babs> have i defined the string wrongly?
[10:45] <Babs> Andy - will do, I haven't forgotten your kind offer. Thanks.
[10:45] <G8UVS> No Problem Babs its sat here ready for when you yell!
[10:46] <G8UVS> be useful to know which type of connecor you will want to use so I can send it too you ready to go
[10:47] <Babs> its the twist on one used on the yaesu portable FT-917D
[10:48] <Babs> I imagine "twist on one" is not the correct technical term
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[10:50] <G8UVS> Sounds line a BNC 50 ohm! but If I am right the 917 has two connectors on eon the base one on the top! which one?
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[10:51] <fsphil> there's a 917?
[10:51] <G8UVS> 817 thinks
[10:51] <fsphil> or do you mean 817
[10:51] <fsphil> ah
[10:52] <fsphil> yea BNC on the front, those horrible old connectors on the back
[10:52] <fsphil> PL-259 or something
[10:52] <G8UVS> be a PL on the base andc a BNC onthe top just need to know which Babs is after
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[10:53] <G8UVS> and even better how long the lead needs to be might as well do a good job while I am about it!
[10:53] <LazyLeopard> SO-239 on the rig, PL-259-to-BNC adapter attached.
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[10:54] <Babs> its the 817 you are right. the BNC on the front is the one I need.
[10:54] <G8UVS> OK Babsa nd the lead length?
[10:54] <Babs> G8UVS. 1m should be fine. Thanks!
[10:54] <G8UVS> OK Ill make that tomorrow at work
[10:56] <Babs> Thats great thanks G8UVS, really no urgency though
[10:57] Nick change: [2]Geoff-G8DHE -> Geoff-G8DHE_
[10:57] <Babs> http://www.codesend.com/view/2f93334c15e566dedafa81e1421be66e/ that code that I can't make IndexOf work with in case anyone has a spare minute. I think the issue is the variable that I define the string with is probably not compatible with the indexOf function, but I'm unsure
[11:02] <fsphil> do you really need that if (Serial.available() >0) ?
[11:02] <mfa298> I was wondering the same thing
[11:03] <fsphil> read() returns a single character
[11:04] <fsphil> not a full line
[11:04] <mfa298> quick google suggests that indexOf returns an int and not a char
[11:05] <mfa298> so you're probably printing out a character with ascii value 7 (BEL ?)
[11:05] <fsphil> you need to read it in byte at a time and add to a string
[11:05] <fsphil> then do your tests when you read a newline charcater
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[11:07] <fsphil> I think print() has an overload for int
[11:08] Action: mfa298 should read the code more carefully, I thought firstcommaposition had been declared as char rather than int
[11:10] <G8UVS> M0NSA you be at raf dio club next wednesday?
[11:11] <G8UVS> MoNSA that be the Southampton radio club not the uni!
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[11:25] <x-f> what is the WGS coordinate format?
[11:27] <x-f> remove the decimal point, pad longitude with zero and add a N/S and E/W?
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[11:36] <x-f> i guess.
[11:48] <qyx_> remove the decimal point?
[11:48] <x-f> like 571234N
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[11:50] <qyx_> afaik wgs84 defines just the geodetic system itself, not the format of data
[11:51] <qyx_> there are multiple formats used, but i have never seen something like 571234N
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[11:51] <qyx_> maybe there is some known standard in hab community, i am just reader here
[11:52] <x-f> CAA asked the coords "in WGS format, for example, 571234N 0241234E"
[11:52] <x-f> googling led only to WGS84, so i got confused
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[11:56] <qyx_> yes, but can be written in several formats
[11:56] <HixWork> As far as I remember WGS is a datum system
[11:57] <qyx_> wgs84 is datum referenced to earth mass centre, equator and null meridian
[11:57] <qyx_> http://www.earthpoint.us/Convert.aspx
[11:58] <qyx_> see this for example, there are multiple ways how to write wgs84 position
[11:58] <HixWork> Would the CAA not accept an OS grid reference?
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[11:59] <x-f> OS?
[11:59] <qyx_> https://en.wikipedia.org/wiki/Ordnance_Survey_National_Grid
[12:00] <qyx_> probably that
[12:00] <qyx_> another local datum system used in GB
[12:00] <qyx_> for example we use JTSK here
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[12:00] <x-f> ah, i'm not in the UK, this is a different CAA
[12:01] <x-f> sorry for the added confusion
[12:01] <qyx_> so just send them wgs84
[12:01] <qyx_> you can get that in google earth
[12:01] <qyx_> or google maps or any other map tool
[12:01] <x-f> i did, thanks
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[12:04] Action: UpuWork slaps Gadget-Mac with a Herring
[12:04] <Darkside> rsup
[12:04] <fsphil> old skool style
[12:04] <Darkside> CUT DOWN THE BIGGEST TREE IN THE FOREST
[12:04] <Darkside> WITH A HERRING
[12:04] <UpuWork> I had to type it manually
[12:05] <UpuWork> mIRC doesn't seem to ship with it any more
[12:05] <Darkside> 21:36 -!- Irssi: Unknown command: slap
[12:05] <Darkside> goddamnit
[12:05] <fsphil> probably a good thing
[12:05] <qyx_> herring?
[12:05] <Darkside> trout
[12:05] <Darkside> thats right
[12:05] <Darkside> its meant to be a trout
[12:05] <UpuWork> it was trout
[12:05] <UpuWork> herrings are better
[12:05] <qyx_> ah
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[12:18] <Babs> sorry, got pulled away from my monitor for an hour - just looking through the code comments
[12:25] <eroomde> poo
[12:30] <Laurenceb> http://diydrones.com/profiles/blogs/skywalker-x8-hand-injury
[12:30] <Laurenceb> new prop test method
[12:31] <Darkside> ouch
[12:32] <Laurenceb> "38mm between cuts"
[12:32] <Laurenceb> useful info
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[12:34] <HixWork> I'm sure some of the guys on diydrones qualify for the DEarwin awards
[12:34] <HixWork> doh
[12:38] <HixWork> Babs, http://arduinobasics.blogspot.co.uk/2011/06/reading-text-or-csv-file-using.html might be of use?
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[12:39] <Babs> fsphil, mfa298. understood. I presume my contention that ypr was the correct string was wrong, all the sketch was doing was printing out one character at a time and then newlining when it hit the carriage return. If I put a delay in the loop (I'm not with the Uno here but can't ) I imagine I would see the string building up, teletype fashion
[12:39] <Babs> its just going so quickly I didn't appreciate it
[12:40] <Babs> I think it should be easy to do from this point on, thanks
[12:40] <Babs> some of the servos you can use to drive off the IMU are amazingly quick. 0.06secs to turn 60 degrees if I am reading them correctly. Although presumably, they are a bit less torquey than the slower ones.
[12:42] <HixWork> wow! that's some speedy servo rate, which ones are you using?
[12:42] <Babs> some sh1tty basic futaba ones, not the quick ones
[12:43] <HixWork> 148s?
[12:43] <Babs> 0.26 seconds to turn 60 degrees.
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[12:43] <Babs> http://www.amazon.co.uk/dp/B004RBV7UA/ref=pe_217191_31005151_3p_M3T1_dp_1
[12:43] <Babs> Don't tell me I can get them for like 0.2 pence from ebay
[12:44] <HixWork> :D
[12:44] <HixWork> I wasnt.
[12:44] <Babs> The camera will not be rotating around that quickly, so that should do for camera stability Mk 1.
[12:44] <Laurenceb> hmm
[12:45] <Babs> I bet you were tempted though HixWork
[12:45] <Laurenceb> have you looked at the direct drive stuff?
[12:45] <HixWork> Though I was thinking of getting hackvana to do some of those sparkfun boards
[12:45] <Babs> Laurenceb is about to throw a spanner into my works, I can feel it.
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[12:45] <HixWork> small brushless motors seem to be taking off in the worlkd of stabilisation
[12:45] <UpuWork> ok if anyone is interested I put the LMT2's on the shop
[12:45] <UpuWork> obviously speak to me before ordering....
[12:46] <fsphil> hello
[12:46] <HixWork> http://ava.upuaut.net/store/index.php?route=product/product&path=71_63&product_id=84
[12:46] <Laurenceb> http://www.youtube.com/watch?v=LWqNwKsH7mA
[12:46] <WillDuckworth> are the lmt2's any good?
[12:47] <Laurenceb> http://vimeo.com/65686869
[12:47] <UpuWork> Very stable WillDuckworth
[12:47] <UpuWork> and frequency agile
[12:47] <UpuWork> they have a TCXO in
[12:47] <WillDuckworth> hmmm - i'll have to say i'mm interested then
[12:47] <UpuWork> but speak to me before ordering :P
[12:47] <Laurenceb> http://www.freeflysystems.com/products/moviM10.php
[12:47] <UpuWork> or "just work it out"
[12:47] <Babs> Laurenceb - nice. I had seen that in action actually, but not the youtube
[12:48] <Laurenceb> i cant see youtube atm...
[12:48] <Laurenceb> flash broke
[12:48] <Babs> I wonder whether I could get Olivia Speranza to review BABS-HAB?
[12:49] <HixWork> allow her to get her hands on your platform you mean
[12:49] <Laurenceb> hehe
[12:49] <Babs> laurenceb - have you got any direct drive links? I'm only pulling up stuff about washing machines, and I'm not convinced that that is where you were pointing me
[12:49] <Laurenceb> erm nope
[12:49] <HixWork> SUDS HAB
[12:49] <HixWork> I might have Babs gimme a mo
[12:50] <Laurenceb> http://www.virtualrobotix.com/group/vr-gimbal-user-group/forum/topics/vr-gimbal-3-axis-32bit-direct-drive-gimbal-controller
[12:50] <Laurenceb> https://code.google.com/p/vrgimbal/
[12:50] <HixWork> http://www.iso1200.com/2013/04/are-you-ready-for-diy-movi-2-axis.html
[12:52] <HixWork> http://www.simplebgc.com/eng/buy/
[12:52] <HixWork> http://forums.openpilot.org/topic/13471-actuators-for-a-camera-gimbal/
[12:53] <eroomde> direct drive?
[12:53] <Laurenceb> ie no servos
[12:53] <Laurenceb> rewound brushless
[12:53] <Laurenceb> run as a stepper
[12:53] <eroomde> ah yes
[12:53] <eroomde> that is my approach
[12:53] <eroomde> for fine pointing accuracy
[12:53] <eroomde> never made one though
[12:53] <HixWork> still trying to get my head arounf the lack of encoder though
[12:53] <eroomde> was going to make a large lever arm thing
[12:53] <Laurenceb> http://www.youtube.com/watch?feature=player_embedded&v=g9RbcDOGAR0
[12:54] <Laurenceb> HixWork: mount imu on the camera
[12:54] <HixWork> yeah, so are they driven with pwm?
[12:54] <Laurenceb> http://www.youtube.com/watch?v=PCngdQJFrsU&feature=player_embedded
[12:54] <Laurenceb> ^very nice
[12:54] <Laurenceb> yes, pwm
[12:55] <Laurenceb> pity russia looks like shit
[12:55] <HixWork> hmm. seems less complex then
[12:56] <eroomde> my reason for direct drive is that 1) there's lots of inertia and nonlinearity in gear trains
[12:56] <eroomde> 2) stiction
[12:56] <eroomde> i just want to apply a torque to a well-balanced cradle
[12:57] <Laurenceb> sounds like a swarm of angry wasps
[12:57] <HixWork> backlash is a big issue too
[12:57] <mfa298> Babs: for debug messages I tend to put something before it to indicate what it is something along the lines of: print "Got Data: " + data
[12:57] <eroomde> backlash is the non-linearity in the geartrain i was refering to
[12:58] <eroomde> sorry i talk like a mathmo
[12:58] <eroomde> backlash = nonlinearity
[12:58] <Babs> understood - thanks mfa298
[12:59] <Babs> there is nothing wrong with talking like a mathmo eroomde
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[13:00] <eroomde> not sure that's always true
[13:00] <eroomde> function of audience as always
[13:00] <eroomde> er, it's to do with the audience, as always
[13:01] <Babs> the girls might act as if one has come from another planet when one talks mathmo
[13:01] <Babs> but underneath they respect it I'm sure
[13:01] <Babs> arf
[13:03] <Laurenceb> id worry about stability
[13:03] <Laurenceb> payload moment of inertia will be small
[13:03] <Laurenceb> unless....
[13:04] <Laurenceb> lok carbon fibre tubes are added at weird angles
[13:04] <Laurenceb> Babs has experience of this
[13:04] <Babs> if it's a core area of skill in this hobby, it is the insertion of carbon fibre tubes at weird angles
[13:05] <Babs> (weird angles into plastic)
[13:06] <Babs> Babs tip of the day: make your hole .33mm wider than your carbon fibre rod and it fits in and stays in without glue, but can also be pulled out with enough force without breaking the plastic part
[13:06] <Babs> I spent about £40 in broken plastic establishing that particular rule
[13:07] <SpeedEvil> you mean narrower?
[13:10] <HixWork> bit of BS4500 i swhat you want http://i.imgur.com/KOPGxD2.png
[13:11] <HixWork> H7 though difficult to achieve with RP parts unless you ream them by hand after making them
[13:14] <eroomde> i have bought maybe 5 zues tables in my life
[13:14] <eroomde> they always dissappear
[13:14] <eroomde> always
[13:14] <eroomde> i think the lathe eats them
[13:16] <HixWork> eroomde, adrian-hicksd.co.uk/zeus
[13:17] <HixWork> zeus in the cloud[s]
[13:17] <HixWork> adrian-hicks.co.uk/zues
[13:17] <HixWork> you know its bad when you typo your own bloody name
[13:17] <eroomde> thanks
[13:17] <HixWork> nps
[13:17] <HixWork> you can now lose a set a day :)
[13:18] <eroomde> yay
[13:18] <HixWork> feed the lathe and let it be happy
[13:20] <eroomde> along with the slide oil
[13:20] <eroomde> its tipple of choice
[13:20] <eroomde> it's been very unhappy since someone did a graphite chamber on it
[13:20] <HixWork> and some suds chasers
[13:20] <eroomde> someone being not me
[13:21] <HixWork> yeah yeah
[13:22] <HixWork> someone cleaned their gearbox casing in the ultrasonic cleaner at Renault a few years back. Race techs were not happy at all
[13:25] <eroomde> my colleage andy gets the same with me
[13:25] <eroomde> i use the ultrasonic cleaner to clean solder paste off the stnecils
[13:25] <eroomde> he uses it as a stage in making rocket parts oxygen safe (basically a very very thorough cleaning)
[13:26] <eroomde> you occassionally hear a roar when he sees lead-ey sludge in the bottom
[13:26] <SpeedEvil> Flux + oxygen = lol
[13:27] <HixWork> I bet he love you
[13:27] <eroomde> mmm
[13:27] <HixWork> *loves
[13:27] <eroomde> yes
[13:27] <eroomde> lots of fire
[13:27] <eroomde> the stainless will burn
[13:28] <eroomde> the trouble is it's not that the dirty bits burn
[13:28] <eroomde> it's that the dirty bits start a fire that causes absolutely everything to burn
[13:28] <eroomde> all the metalwork and everything
[13:28] <eroomde> it all goes michael bay
[13:28] <Laurenceb> even with gaseous oxygen?
[13:29] <eroomde> yup
[13:29] <eroomde> seen it happen on one of ours last year
[13:29] <Laurenceb> wow i didnt know that
[13:29] <eroomde> 200 bar gaseous oxygen, granted
[13:29] <Laurenceb> ah
[13:29] <eroomde> right at the back of the injector
[13:29] <Laurenceb> seems more sane :P
[13:29] <Laurenceb> i can see that being bad
[13:29] <eroomde> where there was a bit of cutting fluid trapped under a burr from a scraping operation
[13:30] <HixWork> My "Programming in C" by Stephen Kochan arrived. Princely sum of £14 in as new condition. Looks good
[13:30] <eroomde> the injector started coming out of the nozzle as a series of bright sparks
[13:30] Action: HixWork likes amazon second hand sellers
[13:31] <HixWork> I found that as good as K&R is, you need something that has a bit more to it, to get you more engaged in it.
[13:31] Action: SpeedEvil grrs at the post office.
[13:32] <SpeedEvil> It's damn expensive to ship books >1 inch thick.
[13:32] <HixWork> and laso I learned that occasionally skipping forwards in LCTWH gets some very useful insight so you can go back and learn easier
[13:32] <HixWork> SpeedEvil, are you UK?
[13:32] <SpeedEvil> Yes
[13:33] <HixWork> http://www.interparcel.com/
[13:33] <HixWork> pretty good
[13:33] <eroomde> but the post office is not bad compared to couriers
[13:33] <eroomde> £11 for insured guaranteed by 1pm next day things up to a fairly substantial size
[13:33] <SpeedEvil> Yeah - by 'very' - I mean >£2 or so
[13:34] <SpeedEvil> And that a 23mm book is much, much cheaper to ship than a 26 one.
[13:34] <HixWork> ive used Interparcel UK Standard before and it's usually UPS
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[13:56] <eroomde> we've just got a fedex account at work now
[13:56] <eroomde> it makes things a lot easier
[13:56] <eroomde> the van pitches up within about 20mins of being ordered
[13:57] <SpeedEvil> Can you give fedex a TLE to ship to?
[14:00] <eroomde> TLE?
[14:00] <SpeedEvil> two line element
[14:00] <eroomde> boeff
[14:01] <eroomde> oh do you actually mean like sattelite TLE?
[14:01] <eroomde> is this a joke i'm missing?
[14:01] <SpeedEvil> It wasn't very amusing.
[14:01] Action: SpeedEvil is exhausted from moving a large pile of wood.
[14:01] <Laurenceb> whooosh
[14:03] <Laurenceb> after enlightenment: chopping water and carrying wood
[14:03] <HixWork> paint da fence
[14:03] <SpeedEvil> It's not quite chopping water weather.
[14:03] <SpeedEvil> It's June.
[14:04] <SpeedEvil> It'll be at least a month before the frosts.
[14:04] <SpeedEvil> http://www.metoffice.gov.uk/climate/uk/anomacts/ - as a random cool site.
[14:04] <SpeedEvil> (Or warm)
[14:04] <SpeedEvil> Showing differences over average per month for a map of the uk
[14:06] <Laurenceb> so it gotr colder?
[14:06] <Laurenceb> oh, in 2013
[14:06] <Laurenceb> i see now
[14:09] <Laurenceb> http://www.gizmag.com/clip-air-modular-aircraft-epfl/27861/
[14:09] <Laurenceb> what are they smoking
[14:11] <Babs> Speedevil - no, wider. the 0.33mm gap is ideal, any less and the manufacturing tolerance of the carbon fibre tube gets you into difficulties by getting it stuck in there
[14:12] <SpeedEvil> Err - you mean the assymetries of the tube hang up on the hole?
[14:12] <SpeedEvil> Or that you're talking ID and OD?
[14:12] <SpeedEvil> Laurenceb: yeah
[14:13] <SpeedEvil> I saw that on /. and couldn't bring myself to read beyond the headline because it would be so deeply retarded.
[14:13] <Babs> inside diameter Speedevil
[14:13] <Babs> for your 7mm tube, use a 7.33mm hole
[14:14] <SpeedEvil> Ah - right
[14:14] Action: SpeedEvil has been looking at structural materials.
[14:14] <SpeedEvil> It's really surprising how bloody awesome wood is.
[14:15] <Babs> as for the outer diameter, the best thing to use is a set of splines http://www.flickr.com/photos/91049302@N00/8462025127/in/set-72157632733154985
[14:15] <Babs> as you are paying only for volume of polymer printed, the spline method (not the correct term) is a cheaper way of getting more or less the same result for cheaper
[14:16] <SpeedEvil> I mean - sure it's 30 times less stiff than steel - but you are not going to replace a 2*6" bit of wood with a solid 2*6" bit of steel - so that's a fair amount down already.
[14:16] <SpeedEvil> Babs: hmm
[14:17] <Laurenceb> wow nice structure
[14:17] <Laurenceb> did you use a solvent there?
[14:17] <SpeedEvil> 'araldited'
[14:17] <Laurenceb> looked solvent welded to me
[14:18] <SpeedEvil> What is that?
[14:18] <Babs> no, just araldite (not a verb I know)
[14:19] <Babs> Speedevil, it is the bit that sits in the middle of BABSHAB and forms the mount for the gimbal http://www.flickr.com/photos/91049302@N00/8685754749/in/set-72157632733154985
[14:19] <Babs> just to the left of the SPOT logo on the top of the capsule
[14:19] <SpeedEvil> Ah
[14:20] <Babs> Laurenceb - if you make something 3-D printed the thing I learnt was you can make it a lot smaller and stronger by putting holes in for smaller carbon fibre tubes to use as cross braces
[14:23] <Babs> but i'd only figured that out when i got to the end of the build, hence that one is the only bit with the carbon fibre braces
[14:26] Nick change: azend_ -> azend
[14:33] <marcosscriven> Babs: what 3D printer do you have?
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[14:36] <Babs> this guy does it, although he did it with the objet one as he's only just got the SLS one. The polymer is OK, but does perish over time (visually at least) http://www.3dprint-uk.co.uk/
[14:38] <marcosscriven> ah yes, know that fellow
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[14:49] Action: Laurenceb grabs "the liberator"
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[14:51] <HixWork> sup chrisstubbs waterpump sorted?
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[14:55] <chrisstubbs> Afternoon, nope not yet! booked in for friday
[14:55] <chrisstubbs> launch will still be going ahead though
[14:56] <HixWork> cool
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[15:47] <Upu> http://www.4-traders.com/SARANTEL-GROUP-PLC-4005092/news/Sarantel-Group-PLC-Corporate-Update-16920226/
[15:49] <daveake> All your fault for using so many chip antennas ;)
[15:49] <Upu> haha
[15:49] <eroomde> kapow
[15:49] <eroomde> fare thee well
[15:49] <eroomde> hope someone buys up the tech
[15:49] <eroomde> as it's nice
[15:51] <Laurenceb> oops
[15:51] <Laurenceb> how do companies with good tech always seem to screw up financially
[15:52] <Laurenceb> yet theres so many people selling junk/bullshit
[15:53] <eroomde> marketing
[15:53] <Laurenceb> seems so
[15:54] <eroomde> depressing isn't it
[15:54] <Laurenceb> yes :(
[15:55] Action: Laurenceb returns to trying to install subfiles.sty on ubuntu 10.04
[15:55] <Laurenceb> more depressing....
[15:57] <Babs> companies with good tech often care more about the solution per se than the commercially viable solution
[15:57] <Babs> which is why they end up producing lovely stuff that makes a loss. they are just happy they are making lovely stuff.
[15:58] <Babs> the guys who buy the IP on the cheap with the secured creditor taking the hit for the money they originally pumped into the company will be the ones that make the money
[15:58] <eroomde> yup
[15:58] <Babs> the margin on those antennas must be huge - variable cost will be close to nothing
[15:58] <eroomde> i have long suspected my propensity to be just-happy-making-lovely-stuff
[15:59] <eroomde> i'm mindful of it
[15:59] <Babs> its paying back the guys who stumped up the loan to develop the thing in the first place that will be killing the company
[15:59] <eroomde> maybe you should swoop in Babs
[15:59] <Babs> eroomde - sometimes that approach works
[15:59] <Babs> see McClaren for eg.
[15:59] <eroomde> secure sarantel antennas for the massive hab market
[15:59] <eroomde> i often wonder how on eart mclaren manage that
[16:00] <Babs> but more often than not it doesn't - see Iridium
[16:00] <eroomde> their burn rate must be obscene
[16:00] <eroomde> where is all the money coming from?
[16:00] <Laurenceb> don't they sell pushchairs?
[16:00] <daveake> lol
[16:00] <Laurenceb> whatever they are called nowadays
[16:00] <daveake> very quick ones
[16:00] <Babs> I was sitting next to a guy at the tennis yesterday who had travelled back on Ron Dennis's private plane with Ron Dennis
[16:00] <Laurenceb> the three wheel things
[16:00] <eroomde> perambulators i think, Laurenceb
[16:00] <Laurenceb> ah yes
[16:01] <Babs> He said his obsessiveness with perfection was extraordinary
[16:01] <Babs> everyone knows about in the factory
[16:01] <eroomde> mmm, but that can often go both ways
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[16:01] <daveake> it is. Shame his F1 car is, er, not perfect
[16:01] <eroomde> for every steve jobs there are 100 cargoculting dickheads
[16:01] <Babs> but apparently his obsessiveness on perfection extended to taking the guy into the toilet on the private plane
[16:02] <daveake> To make sure he didn't splash?
[16:02] <eroomde> but where does mclaren get all its money from? are they actually self-sufficiently profit-making?
[16:02] <Babs> and showing him the exact way that he should wipe the seat and basin down so it was in perfect working order for when Ron needed to go and take a dump
[16:02] <Babs> eroomde - cigarettes in the 1970s and 1980s
[16:03] <daveake> I assume the basin had a high level of aerodynamic downforce
[16:03] <eroomde> sure but in the last 30 years
[16:03] <Babs> along with cereal manufacturers, cigarette manufacturers are the only guys in business who struggle to get rid of the humungous amounts of cash they generate in day to day operations.
[16:04] <Babs> daveake - there is a fine line between aerodynamic splitters and aerodynamic sh1tters
[16:04] <fsphil> opinion of human race dropping slightly
[16:04] <daveake> that's a line I'll stay clear of
[16:04] <eroomde> they have a historic vehicle collection that is about 1/3 their annual turnover
[16:04] <eroomde> but a lot of that turnover must be sponsorship
[16:04] <Laurenceb> ok... anyways
[16:04] <Laurenceb> where the hell are sty files?!?
[16:04] <Babs> ciggies gave them the money to get going, and then they broadened out to get revenue from all over the place
[16:04] <eroomde> oh they have 40% of daimler
[16:05] <Laurenceb> i hate ubuntu
[16:05] <Babs> F1 took off, and with it the prize money. Then telecoms came about (another industry struggling to get rid of its cash, which is why I am a vodafone buyer right now).
[16:06] <eroomde> what do you buy for vodafone?
[16:06] <eroomde> other companies?
[16:07] <eroomde> gosh apparently vodafone alone give mclaren about £45m a year
[16:07] <eroomde> just think of the tech development you could do with that money
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[16:07] <eroomde> rather than whizzing around tracks hunting for 0.0001% improvements and rule loopholes
[16:09] <Babs> I guess we all know this, but in case anyone doesn't the "f-duct" that did all that improvement in F1 a few years ago was so called because the hole was by the 'f' in vodafone on the cars nose. Babs Trufact.
[16:11] <Babs> eroomde - a buyer of vodafones shares. or i was when it was at 175p, it yielded 7% and its US asset was worth more than its market capitalisation. A nice one way bet.
[16:11] <eroomde> mmm
[16:12] <eroomde> maybe I should pitch a Vodafone Smallsat launcher
[16:12] <Babs> one way bets, you have to have heard of them. Tulips in the 1600s, dotcoms in the 2000s, that kind of thing.
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[16:13] <eroomde> i still can't beleive that you could become a world superpower on the back of tuplips
[16:13] <eroomde> tulips*
[16:16] <SpeedEvil> 'oil'? Why were there world superpowers based on oil, it makes no sense - they already had fission.
[16:18] <eroomde> yes but oil was/is a fairly easy way to make energy
[16:18] <eroomde> unlike tuplips
[16:18] <SpeedEvil> Fair point.
[16:18] <SpeedEvil> Tulips were a bit wacky.
[16:19] <SpeedEvil> My parents _almost_ made a modest fortune during bunker+hunt's manipulation of the silver market.
[16:19] <eroomde> i guess gold tho
[16:20] <eroomde> pretty useless
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[16:21] <SpeedEvil> Oooh.
[16:21] <SpeedEvil> I diddn't realise this.
[16:21] <SpeedEvil> https://en.wikipedia.org/wiki/Uranium_bubble_of_2007
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[16:53] Nick change: Upu -> UpuWork
[16:53] Nick change: Upu- -> Upu
[17:03] <cuddykid> Upu: do you know of a way to connect terrestrial aerial to BNC or SMA? or perhaps your pre-amp?
[17:04] <cuddykid> this dongle thing has only got terrestrial antenna
[17:10] <mfa298> you could probablt make up a short lead with belling lee (Standard TV connector) on one and and something useful on the other.
[17:10] <mfa298> other people have changed the socket over to sma on the dongles
[17:11] <cuddykid> ah yes, changing socket might be best
[17:12] <mfa298> my dongle like that came with the smaller connector and a small magmount antenna so I just jut the cable and stuck a bnc on the other end to make a patch cable (I happened to have a suitable bnc in the junk box)
[17:19] <Upu> cuddykid http://www.ebay.co.uk/itm/6in-IEC-DVB-T-TV-PAL-male-plug-to-SMA-female-jack-jumper-cable-RG316-/161009698537?pt=US_Radio_Comm_Coaxial_Cables_Connectors&hash=item257ced06e9
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[17:20] <cuddykid> excellent, just right for the job - thanks Upu
[17:21] <Upu> normally I'd say swap the connector but your PCB is nasty
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[18:09] Nick change: [1]chrisstubbs -> chrisstubbs
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[18:43] <fsphil> I missed rain, right up until 30 seconds after it started raining
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[18:45] <GW8RAK> You've had it quite dry over there I believe fsphil
[18:45] <fsphil> for quite a while
[18:46] <fsphil> our summer lasted over a week this year
[18:46] <fsphil> it will be talked about for years
[18:46] <GW8RAK> More than 3 days is a drought
[18:46] <fsphil> something to tell the kids
[18:46] <GW8RAK> You'd better get busy then :)
[18:46] <fsphil> lol
[18:49] <fsphil> http://habhub.org//predict/#!/uuid=e0710fbe9779a8fc0caeefb22d54a2ed8454d8bb
[18:49] <fsphil> if only the ferry was cheaper
[18:49] <GW8RAK> Just wondering if I can sync Dropbox to Ubuntu One
[18:50] <GW8RAK> Is that in visible range from NI?
[18:50] <fsphil> yep
[18:50] <GW8RAK> How frustrating
[18:50] <fsphil> on a clear day anyway
[18:51] <fsphil> I was over at the weekend, you could just make out the other side
[18:53] Action: mfa298 wonders if we can swap the weather fsphil has had with the weather down here. Been wet for a couple of days now (and some rain at the weekend)
[18:54] <mfa298> half the time I look out the window the rain looks to be horizontal
[18:55] <fsphil> the sky is looking quite grumpy
[18:55] <fsphil> wouldn't be surprised to get some thunder
[18:55] <GW8RAK> Only got slightly damp on the way home tonight. Escaped the rain
[19:01] <Upu> ping Gadget-Mac
[19:02] <fsphil> ot, but does anyone know how to extract audio from an iso image?
[19:02] <fsphil> in linxu
[19:02] <fsphil> x<>u
[19:03] <mfa298> use losetup to attach it to a loop device ?
[19:03] <fsphil> tried that
[19:04] <mfa298> there's probably some bit of software that would do it direct from the iso image as well but not something I've tried
[19:04] <fsphil> then ran cdparanoia on it, just complained it wasn't a cdrom
[19:04] <mfa298> vlc might do it - I know it can play iso images of video on windows
[19:04] <fsphil> hmm.. worth a try
[19:05] <mfa298> if your fedora/centos it's available on rpmfusion
[19:05] <fsphil> nope
[19:06] <fsphil> I tried cheating, writing it to disk, but it's too large
[19:06] <mfa298> * total grammar fail there so I won't even try and fix it/
[19:08] <mfa298> I'm not sure I have any other ideas after that - It's not something I've done for a while.
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[19:09] <mfa298> I think last time I tried ripping CD's on a *nix it was on Solaris (didn't have a windows box with a CD drive to hand)
[19:11] <fsphil> I've never done it backwards
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[19:12] <mfa298> there must be a way to do it. It's Linux it can do everything!
[19:23] <DanielRichman> fsphil: wikipedia says "This also means that CD-Audios, which are usually composed of multiple tracks, can't be stored inside an ISO image."
[19:25] <mfa298> I suspect it's technically a disk image rather than an ISO (presumably created with the likes of dd)
[19:27] <g4fui> fsphil : I just Googled "isobuster for linux" and it came up with a few (mostly dodgy looking) hits, but apparently there's something called "dvdisaster" which apparently worked for someone ...
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[19:28] <Lunar_Lander> evening
[19:33] <fsphil> suspect that's correct DanielRichman
[19:34] <x-f> evening
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[20:02] <Lunar_Lander> hi S_Mark
[20:02] <S_Mark> hello Lunar_Lander
[20:03] <Lunar_Lander> how's life?
[20:05] <x-f> S_Mark, you know Stratodean is mentioned on the rtl-sdr.com blog?
[20:06] <S_Mark> ah no I dont!
[20:06] <S_Mark> back in 2 mins and I'll have a look
[20:06] <S_Mark> brb
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[20:06] <Lunar_Lander> again gone
[20:06] <Lunar_Lander> like yesterday when I wanted to ask him where he buys his electronics
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[20:37] <WILLdude> Is Iron Man around?
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[20:38] <WILLdude> (Upu)
[20:38] <WILLdude> Choosing IP cameras is so difficult.
[20:38] <Upu> Iron Man ? :/
[20:40] <WILLdude> Anthony Stark
[20:43] <fsphil> no, Upu is Iron Man's British cousin, Aluminium Man
[20:44] <daveake> Bit of a lightweight?
[20:47] <gonzo_> showing his metal
[20:47] <fsphil> shiny
[20:48] <fsphil> I'm surprised none of Iron Man's enemies haven't just got a giant magnet
[20:49] <gonzo_> didn't the iron man lure the dragon into the sun?
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[20:51] <S_Mark> Sorry about that x-f
[20:51] <S_Mark> what was the name of that site please?
[20:52] <Lunar_Lander> S_Mark, got a question
[20:52] <S_Mark> yep
[20:52] <Lunar_Lander> where do you buy your electronics?
[20:53] <S_Mark> So far it has been a combination of ebay, Upu and Maplin! Looking at Farnell for the next tracker
[20:54] <Lunar_Lander> yea
[20:57] <S_Mark> you dont happen to know the name of that blog do you Lunar_Lander
[20:57] <S_Mark> or I can check zeusbot
[20:58] <x-f> S_Mark, http://www.rtl-sdr.com/receiving-weather-balloon-data-with-rtl-sdr/
[20:58] <S_Mark> ah cool thank you!
[20:58] <Lunar_Lander> actually I haven't seen the blog myself
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[21:13] <Laurenceb_> http://diydrones.com/profiles/blogs/today-we-sent-the-1-vr-3-axis-gimbal-dev-kit-at-first-developer
[21:18] Nick change: heathkid|2 -> heathkid
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[21:19] <Willdude123> I'm planning on getting one of these ftdi boards once I can afford it, I've had enough SS for now.
[21:23] <Willdude123> To be clear ftdi boards are so I can use hardware serial and debug at the same time right?
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[21:32] <chrisstubbs> Willdude123, you use hardware serial for your ublox, then opwn an SS port to sebug over the FTDI cable
[21:32] <chrisstubbs> *open *debug
[21:33] <Willdude123> Yeah, that's what I thought.
[21:33] <chrisstubbs> Need to start reading these things before I press enter!
[21:33] <heathkid> anyone want to yell at me over an antenna choice? :)
[21:33] <chrisstubbs> Is it a stubby antenna? ;)
[21:33] <heathkid> no... OPEK HR-603VU-BNC
[21:33] <heathkid> 1/4 wave whip
[21:33] <heathkid> BNC
[21:34] <Willdude123> I'll wait till the end of the month to get one, that's when I get my pocket money and interest.
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[21:34] <heathkid> was thinking of soldering four stiff wires to the BNC connector for an actual ground plane
[21:34] <heathkid> thoughts?
[21:34] <heathkid> works great on the ground
[21:36] <chrisstubbs> Is that for home use or mobile use?
[21:36] <heathkid> at 300mW I get about 25 miles
[21:36] <heathkid> pointing down for HAB use
[21:36] <chrisstubbs> Oh right sorry for the balloon
[21:37] <heathkid> other than weight... chassis mount BNC connector to SMA for the tracker
[21:37] <heathkid> via short adapter cable
[21:37] <chrisstubbs> I guess it would work just fine, not sure if it would be any better than a 1/4 wave made from coax and wire radials
[21:37] <heathkid> true
[21:38] <heathkid> would it be any worse?
[21:38] <chrisstubbs> Nevery used anything like that before so lets wait for someone else to jump in... :P
[21:38] <chrisstubbs> heathkid, is this for 434mhz in the UK?
[21:39] <heathkid> 2m USA
[21:39] <chrisstubbs> Ahh right
[21:39] <heathkid> or switched to 70cm band for RTTY *IF* I can do both. :)
[21:39] <chrisstubbs> Upu and arko are probably the guys to talk to for 2m hab antennas
[21:39] <arko> i used a center fed dipole
[21:39] <Upu> I used a 2 meter slim jim made from twin core feeder which worked really well
[21:40] <arko> http://wiki.032.la/nsl/HABEXpico1
[21:40] <Upu> http://www.m0ukd.com/Calculators/Slim_Jim/
[21:40] <arko> oh yeah, slim jims are nice too
[21:40] <heathkid> is the dog part of the payload?
[21:40] <heathkid> :P
[21:41] <arko> i just cut two 50 centimeter thick wire
[21:41] <Upu> https://plus.google.com/photos/118244444241111963790/albums/5851139201894660721/5851139479436023122?banner=pwa&pid=5851139479436023122&oid=118244444241111963790
[21:41] <arko> both vertical
[21:41] <arko> fed at center, derr
[21:41] <arko> heathkid: yes
[21:41] <heathkid> lol
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[21:42] <arko> the one downside to dipole is that directly under and above the antenna gets no signal
[21:43] <arko> but it's not that critical since you travel far out
[21:43] <arko> it worked flawlessly these last two habs
[21:43] <fsphil> flaw with the quarter waves too
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[21:43] <fsphil> though you'd have to be directly under it to lose the signal
[21:43] <arko> Upu's travelled europe with a slim jim
[21:43] <arko> heh
[21:44] <heathkid> I was just thinking with a whip... I could build the payload to be "self righting" so the antenna is pointing up when on the ground (assuming it lands on the ground!)
[21:44] <fsphil> was thinking about that the other day, is Upu's flight the second most distant payload to be recovered?
[21:44] <Upu> apart from K6RPT probably
[21:44] <Laurenceb_> http://www.epicfail.net/wp-content/uploads/2013/01/20130113-103153.jpg
[21:45] <mfa298> I've got a feeling the slim jim is even more of a squashed donut for the radiation pattern than a dipole so would have the same issue if you're directly under it
[21:45] <heathkid> what about the J-Pole?
[21:45] <heathkid> that's what I use for a home antenna
[21:46] <heathkid> built out of twin-lead... not copper pipe
[21:46] <mfa298> I've got a feeling it's similar to the slim jim but it's been a while since I've looked.
[21:47] <heathkid> did you use ladder line to build the Slim Jim?
[21:47] Action: heathkid trying to wrap his head around the spacing...
[21:48] <mfa298> for home/ground based ham stuff I've stuck with home made dipoles or comercial white stick verticals so far. Although I know people who've made slim jims from ladder line
[21:48] <mfa298> I think Upu's slim jim was ladder line.
[21:48] <Upu> it was
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[21:49] <heathkid> Upu, have a spare you'd sell me for 2m?
[21:49] <heathkid> known working
[21:49] <heathkid> :)
[21:49] <Upu> nah it home made wouldn't sell it
[21:49] <Upu> easy to make though
[21:49] <heathkid> ok
[21:49] <Upu> you just need to make a choke which is just some 40mm PVC tube with the coax wrapped round it
[21:50] <mfa298> there's plenty of guides to making them online
[21:50] <Upu> I just used that link I posted
[21:50] <heathkid> thanks, I have it book marked and will try to build one soon
[21:50] <heathkid> Upu can you help me run a test on spacenear.us?
[21:50] <heathkid> APRS
[21:50] <heathkid> like before
[21:51] <Upu> sure whats the call sign ?
[21:51] <heathkid> KA8MAV-11
[21:51] <heathkid> running new code with telemetry and want to make sure it's not messing things up in the decoding process
[21:51] <Upu> done
[21:51] <heathkid> thanks!
[21:52] <heathkid> although my temp sensor is a bit flaky... not soldered in... just stuck it in the holes. :)
[21:53] <heathkid> so much for that...
[21:53] <heathkid> batt voltage, internal temp, etc. not showing up
[21:53] <heathkid> guess I can't make both aprs.fi and spacenear.us happy at the same time?
[21:53] <heathkid> not even showing how many sats
[21:53] <heathkid> hmm
[21:55] <heathkid> Upu, if you could leave it up and running for a bit (no one else has anything in the air) maybe we can tweak the firmware a bit...
[21:55] <Upu> sure I'll leave it going
[21:55] <heathkid> thanks!
[21:59] <chrisstubbs> On habitat genpayload it says BST is detected from the date, Is that right and it just displays in UTC on spacenear.us?
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[22:11] <Willdude123> It took me ten minutes in a science lesson to explain why geothermal energy would be useless in the gulf republic to someone. All the renewable energy stuff can be quite interesting
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