[00:00] <edmoore> nope
[00:00] <Laurenceb_> hmm I cant find it now
[00:00] <jnd> jcoxon: have you seen any trams in russia?
[00:00] <Laurenceb_> they seem to have changed their datasheets - there is no mension of self test over spi
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[00:09] <jcoxon> jnd, hmmmm i used them in warsaw, poland
[00:09] <jcoxon> in moscow i used their underground
[00:10] <jcoxon> and there is a good tram in istanbul (was there earlier this year)
[00:14] <jnd> other company from my country made 14000 trams of one type, it should be still in many cities :)
[00:14] <jcoxon> jnd, where you from?
[00:14] <jnd> czech rep
[00:14] <jcoxon> oh cool
[00:15] <jcoxon> i've got a friend from Brno
[00:16] <Laurenceb_> hmm whats the best way to glue in lipo cells?
[00:16] <Laurenceb_> I need to fix them to blue foam... but ideally it has to be fairly removable
[00:17] <jcoxon> haha, Laurenceb_ thats a bit of a contradiction
[00:17] <Laurenceb_> lol I guess so
[00:18] <Laurenceb_> I'm thinking coat the foam with a bit of epoxy, then use that as a base for adhesive foam pads
[00:20] <jnd> nice, I live in Prague
[00:28] <jcoxon> night all
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[00:40] <Laurenceb_> cya all
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[01:18] <jnd> night
[01:40] <jiffe88> hmm, mixw seems to have a lot more options over truetty
[01:41] <jiffe88> still not able to remove crc checks though
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[08:23] <edmoore> morning jcoxon
[08:24] <jcoxon> hey edmoore
[08:25] <jcoxon> ooo new arduino dev environment
[08:28] <jcoxon> exciting plans for the day?
[08:32] <edmoore> jcoxon: back to guildford to carry on making stuff
[08:32] <edmoore> till about midday
[08:32] <edmoore> then lunch at home, then london this eve
[08:33] <jcoxon> cool cool
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[11:57] <jcoxon> morning all
[11:59] <SpikeUK> Hi jcoxon!
[12:00] <jnd> afternoon :)
[12:00] <SpikeUK> Good night - your go ;-)
[12:01] <jcoxon> its only just afternoon here!
[12:01] <SpikeUK> ooooh - by one min!
[12:02] <SpikeUK> Just working my way through the Sparkfun tutorial http://www.sparkfun.com/commerce/tutorial_info.php?tutorials_id=57
[12:03] <SpikeUK> well written!
[12:03] <jcoxon> yeah looks very good
[12:03] <jcoxon> might have to read that sometime soon
[12:04] <SpikeUK> as if!
[12:04] <SpikeUK> as if you need to I mean jcoxon!
[12:04] <jcoxon> oh my electrical knowledge is pretty rubbish
[12:05] <jcoxon> i only hack stuff together
[12:05] <SpikeUK> Really? Had me fooled!
[12:05] <jcoxon> hehe, its why my stuff only works half the time
[12:05] <jcoxon> i'm getting better at it though
[12:06] <SpikeUK> The results prove that I'd say!
[12:08] <SpikeUK> Going away for 30mins - be back later!
[12:08] <jcoxon> cya
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[12:22] <rocketboy> robert1971: didn't you have some problems with the IQ data connector - I just got one so didn't want to get it the wrong way round
[12:31] <jcoxon> rocketboy: i've forwarded to you the correct pinout
[12:32] <rocketboy> tnx
[12:36] <rocketboy> do you know anything about bending the metal tabs to get the connector in?
[12:36] <rocketboy> or lifting the shield
[12:38] <jcoxon> nope, sorry
[12:41] <jcoxon> rocketboy: which antenna did you get for the lassen?
[12:42] <rocketboy> the little one - with the short cable
[12:42] <rocketboy> heavy though
[12:44] <jcoxon> interesting
[12:44] <rocketboy> did you send the email to steve@... ?
[12:44] <jcoxon> yup
[12:45] <robert1971> rocketboy
[12:45] <jcoxon> its in my sent mail box
[12:45] <robert1971> Yep the one from dpie is around the wrong way whne compared to the dhielding
[12:45] <robert1971> Shielding
[12:46] <robert1971> rocketboy: I bent the metal tabs
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[12:46] <rocketboy> ah ta robert1971 - that seems the best thing to do
[12:47] <rocketboy> just webmail being slow .... grrrrrrrrr
[12:50] <rocketboy> I think the one from dpie is the correct one FFSD-04-S-06-01 - its whats listed in the lassen manual - so the picture in the manual must be wrong
[12:52] <rocketboy> so basically the pin 1 marking on the connector is on the wrong side if the wire is to come out in line with the indent in the shielding?
[12:52] <rocketboy> (i.e. the red wire is on the wrong side?
[12:56] <jcoxon> bbl
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[12:56] <rocketboy> bbl2
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[13:22] <edmoore> greetings alll
[13:22] <ShellEvil> Meep.
[13:23] <edmoore> it's nice weather for once
[13:23] <edmoore> I' enjoying this outsideness
[13:24] <ShellEvil> :)
[13:24] <robert1971> I need to launch something
[13:24] <ShellEvil> It is nice - I'm debating if it's nice enough - and won't rain for the rest of the day - spraying my gazebo.
[13:24] <edmoore> robert1971: it's called HABitis
[13:24] <edmoore> it occurs at about 2 months
[13:25] <robert1971> I'm haveing probles withthe gps working when next to the radiometrix
[13:25] <robert1971> Common?
[13:25] <edmoore> starts in the midn and spreads all ove3r until you twitch with excitement/frustration/freneticism
[13:25] <edmoore> cure: launch.
[13:25] <edmoore> robert1971: yes, not altogether unexpected
[13:25] <robert1971> Such a nice day how long to those met ballon hold their heliom
[13:25] <robert1971> Helium
[13:25] <edmoore> a very large source of interefering radio waves next to a very sensitive radio receiver
[13:26] <ShellEvil> http://www.piratejesus.com/nerdcore/077.html
[13:26] <edmoore> I'm not sure - it diffuses out by I don't have a co-efficient on it
[13:26] <edmoore> certainly we have done drop tests on a saturday and used the same balloon for a launch on a sunday
[13:26] <ShellEvil> insane pun.
[13:26] <edmoore> it has less helium in it, but I don't know by how much
[13:27] <robert1971> Hum Some playling needs to be done
[13:27] <ShellEvil> I wonder if O2/N2/H2O diffuse in.
[13:27] <robert1971> I have too much helium in the garage not to have a play with the parachute.
[13:27] <robert1971> I need some string
[13:28] <robert1971> Fist fix takes a while
[13:29] <robert1971> first
[13:31] <edmoore> you can play parachutes with cars too
[13:31] <edmoore> stick a vertical pole to the roof rack of the land cruiser, then put the chute atop that
[13:31] <edmoore> that way it's out of the disturbed flow of the car
[13:32] <edmoore> if you want to be super cunning, log speed via gps and put some kind of load cell into the adc
[13:32] <edmoore> and you can then work out the drag co-efficient accurately
[13:32] <ShellEvil> I have some scribbles for a thing like that.
[13:32] <ShellEvil> 3-axis turntable, and wind-meter
[13:33] <ShellEvil> And lots of load cells.
[13:33] <ShellEvil> For working out thrusts/torques at various attitudes/airspeeds/thrust settings for my UAV
[13:34] <edmoore> no pitot?
[13:35] <edmoore> I mean, my basic control theory says that, for a PID loop, it's just Kp/(0.5*density*v^2), i.e. proportional gain divided by dynamic pressure
[13:35] <ShellEvil> yes.
[13:35] <robert1971> wow
[13:35] <ShellEvil> But it's basically a ducted prop, and nothing else.
[13:35] <ShellEvil> I need information on how it performs when it's flying sideways.
[13:35] <robert1971> I'm going to send a balloon up say 100meters and drop shute with payload
[13:35] <ShellEvil> :)
[13:36] <robert1971> Nothing scientific
[13:36] <robert1971> Other than does it open
[13:38] <edmoore> :)
[13:38] <edmoore> the most important question!
[13:38] <edmoore> we just tested 2 chutes, designed to the same spec. one woul open, one would not
[13:38] <edmoore> to the untrained eye they both looked the same
[13:39] <edmoore> but one had less flexible spectra lines, the other had more flexible kevlar lines. the kevlar would open, the spectra would sit there in the tunnel flow like an epileptic jellyfish
[13:41] <ShellEvil> edmoore: and yes - I have at least 3 pitots planned on the thing - possibly more.
[13:41] <ShellEvil> edmoore: but I want to see how the propwash interacts with them.
[13:42] <ShellEvil> edmoore: before it smacks into the ground at 90MPH, and I have to work it out from the black-box.
[13:42] <robert1971> Can you rf shield between devices?
[13:42] <edmoore> ShellEvil: fair enough :)
[13:42] <edmoore> robert1971: yes
[13:42] <edmoore> first - veroboard can be a bit dodge with rf. make sure the tracks are as short as possible and no longer
[13:43] <edmoore> otherwise they are just antennas
[13:43] <edmoore> second, if you put a wall of foil between the gps and the radiometirx, and connect the foil to RFGND, that will help
[13:43] <robert1971> I have removed the tracks arounf rf gnd and active
[13:43] <edmoore> third - physical seperation.
[13:44] <robert1971> OK I'll get that sorted
[13:46] <edmoore> 4th - a 10nF capacitor connecting +V to gnd in various places - especially right by the pins to the gps, will help
[13:46] <ShellEvil> http://www.mauve.plus.com/test.png Bad render - of it flying overhead - showing motor in yellow, prop in purple, and thrust vector vanes in purple.
[13:46] <Hiena> Yeah, and adding PI filter between the receiver and the other parts.
[13:47] <edmoore> it's blank for me
[13:47] <edmoore> Hiena: I believe the lassen's have pretty good filtering built in
[13:47] <ShellEvil> Odd - works for me.
[13:47] <edmoore> i think it might be a problem with front end saturation
[13:48] <edmoore> it's a white png
[13:48] <edmoore> osx 10.5
[13:48] <edmoore> safari
[13:48] <edmoore> 3.1.2
[13:48] <Hiena> edmoore, i fought weeks with a "well designed" wireless cameras, due the switching regulator spikes.
[13:48] <ShellEvil> It should be 68343 bytes
[13:49] <edmoore> good lord, I saw it for about 3 seconds
[13:49] <edmoore> then it went black
[13:49] <edmoore> works in firefox
[13:49] <Hiena> Six different camera six different trouble, one of them has modulation on the audio channel. Kind of trippy modulation.
[13:49] <edmoore> how odd!
[13:50] <edmoore> ShellEvil: looks very cool I must say
[13:51] <ShellEvil> edmoore: the intent is for it to be ~30cm, and 1Kg.
[13:51] <ShellEvil> edmoore: ascend to 1-4Km, take 100MP panorama, land on takeoff spot automatically.
[13:55] <robert1971> Any ideas where to get braided coord for theathered launch?
[13:55] <ShellEvil> renders are the easy part :)
[13:57] <edmoore> robert1971: not sure. any pace that sells braided nylong or something. a chandlers, maybe
[13:57] <edmoore> though there can't be many of them round your partss
[14:09] <robert1971> Phone the local chandlers they're closed at the w/e
[14:10] <edmoore> annoying
[14:10] <edmoore> that's when peope sail, surely
[14:10] <edmoore> they missed a trick
[14:10] <robert1971> I pointed that out.
[14:11] <robert1971> Will try a couple of others. There are lots of cannals in yourkshire
[14:11] <edmoore> ah yes, I forget
[14:11] <edmoore> I live just by chichester so there are a few round here. Fishing or camping places might be good too
[14:11] <edmoore> or anywhere that does kites
[14:29] <robert1971> On a mission found an open marina
[14:29] <robert1971> Has small chadlry
[14:30] <robert1971> bbl
[14:30] <robert1971> :)
[14:30] <edmoore> :)
[14:30] <edmoore> god speed!
[14:30] <robert1971> Thankyou sir
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[15:40] <edmoore> whoops
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[16:39] <robert1971> There is going to be a teatherd launch of sorts tonight
[16:40] <robert1971> My even broadcast attempt on tracker
[16:41] <SpikeUK> Nice one robert1971! Got your braided cord then ;-)
[16:49] <robert1971> After a fashon. A B&Q fixit
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[16:59] <robert1971> jcoxon: There is going to be a teathered launch this evening.
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[17:04] <jcoxon> robert1971, oooo cool
[17:04] <jcoxon> what sort of height?
[17:04] <jcoxon> and be careful not to let it go!
[17:05] <SpikeUK> robert1971 - B&Q good!
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[17:47] <robert1971> jcoxon: 360ft it sounds higher
[17:47] <robert1971> And I'm at 176m above sea level
[17:47] <robert1971> I'm counting it all
[17:49] <robert1971> The weather is going to be still tomorrow so there is going to be another few test launches and para drops tomorrow
[17:50] <robert1971> All teathered
[17:50] <jcoxon> okay cool
[17:51] <robert1971> A bit above kite restriction but whos counting
[17:51] <jcoxon> kite restriction being 100m?
[17:51] <robert1971> 60m
[17:51] <jcoxon> oh right :-p
[17:53] <jcoxon> so 286m above sea level in total
[17:53] <robert1971> Fingers x'ed
[17:54] <jcoxon> hmmm doubt i'd be able to hear it
[17:54] <robert1971> Completing beacon to send info back tonight so will have a true'ish data tomorrow
[17:54] <robert1971> This balloon filling and camera test
[17:55] <jcoxon> so just a 1Hz beacon then
[17:55] <jcoxon> yeah balloon filling is a little bit of an art
[17:55] <robert1971> How many launches are the in a big cylinder 2+?
[17:56] <robert1971> 9m3 I know it depends on the sixe of the balloon
[17:56] <jcoxon> indeed
[17:56] <jcoxon> i reckon 2 launches
[17:56] <robert1971> Cool and this is a baby one
[17:56] <robert1971> 500g
[17:56] <jcoxon> well you won't need much gas
[17:57] <jcoxon> peg I was 1kg on a 200g balloon
[17:58] <jcoxon> you should be able to reuse the balloon tomorrow if you are careful
[17:59] <robert1971> Excellent that's the plan
[17:59] <robert1971> I think I can infate in the conservatory
[18:00] <robert1971> I will get the laptop set up and broadcasting if anyone is interesested. I may be a slow night
[18:00] <robert1971> it*
[18:00] <jcoxon> hehe
[18:00] <robert1971> I have till sunset
[18:00] <jcoxon> you really won't need that much helium
[18:00] <robert1971> Great
[18:01] <jcoxon> i'm sadly out tonight
[18:01] <jcoxon> but if you do something again i might listen for it
[18:01] <jcoxon> though it would be a long shot
[18:01] <jcoxon> but it might be possible to distinguish a beacon
[18:05] <robert1971> More for the 4th. I'll use the least amount to lift the payload and string + a bit for tomorrow
[18:05] <robert1971> I'll try the beacon tomorrow if you want to listen. We have a big hil neaby
[18:05] <robert1971> near by
[18:06] <robert1971> SHould be able to get it to 340m above sea level
[18:06] <ShellEvil> That does relatively little
[18:06] <ShellEvil> once you're well over the horizon I mean
[18:07] <jcoxon> robert1971, don't go out of your way, its a massive long shot
[18:07] <jcoxon> i'm pretty far away!
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[18:48] <SpikeUK> robert1971 - where about are you?
[18:49] <SpikeUK> I'm in Surrey - Weybridge way
[18:50] <SpikeUK> Is your beacon on 434.650MHz?
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[19:31] <SpikeUK> Hi rocketboy! robert1971 is in the process of running a tethered test - been a bit quiet for about 90-mins though
[19:42] <robert1971> Back
[19:42] <robert1971> Done it. Bit dark out there
[19:42] <robert1971> Pics in an hour after I put the kids to bed
[19:42] <robert1971> Going up again tommorw 6 am
[19:43] <robert1971> Wakefield
[19:45] <SpikeUK> Nice one robert1971!
[19:48] <SpikeUK> "Wakefield"! I'll need more than a dipole to rx your beacon I feel ;-)
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[20:17] <robert1971> Back
[20:17] <robert1971> Kids fed and down
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[20:17] <robert1971> Well teatherd launch and indeed my first launch was a bit rushed
[20:18] <robert1971> But managed to lift off 7 minutes after sunset.
[20:18] <robert1971> This is not a good time to take picturs as the shutter speed is too slow to get anything more than a blur#
[20:18] <robert1971> I know this for certain now
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[20:40] <robert1971> RocketBoy: Did you get your iQ up and runing
[20:56] <RocketBoy> na not yet - the email from jcoxon hasn't come through - although I think I have worked out the pinout - I can just see it marked on the board
[20:57] <RocketBoy> its my 2nd priority at the moment - I need to fionish off the packet and sstv code
[21:06] <robert1971> Oh I have the email here I sent it to jcoxon the other day
[21:07] <robert1971> Do you want me to send it on to you
[21:07] <RocketBoy> please - that would be good do you have my addy?
[21:09] <robert1971> Sent
[21:09] <RocketBoy> tnx
[21:09] <robert1971> Yep from the balloons
[21:09] <RocketBoy> oh yeah
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[22:47] <jiffe88> hmm, I'm looking at truetty and not seeing any pocket specific configuration options
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[23:34] <Laurenceb_> hi everyone
[23:38] <robert1971> evening Laurenceb_
[23:41] Action: Laurenceb_ has a new gyro ready to go
[23:42] <Laurenceb_> just replaced the filter cap so its got 3Db attenuation at 19Hz
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[23:48] <jcoxon> evening all
[23:48] <jcoxon> robert1971, how did the tether go?
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[00:00] --- Sun Sep 21 2008