highaltitude.log.20081116

[00:00] <Laurenceb> well I've done over 1meter
[00:00] <Laurenceb> behold the amzing speed
[00:01] <Laurenceb> also managed to swist it... grrr
[00:01] <Laurenceb> it might iron out
[00:03] <Laurenceb> http://wiki.ukhas.org.uk/_media/projects:ukhas_glider_project:pict7921.jpg
[00:03] <Laurenceb> I'm making one of those, only about half the size
[00:03] <Laurenceb> and much better made (hopefully)
[00:04] <Laurenceb> thats from last year
[00:04] <Ei5GTB_> pretty sweet
[00:04] <Ei5GTB_> you dont have any idea what kinds of motors those quad copters were using?
[00:04] <Ei5GTB_> seemed strange, the entire outside of them rotated..
[00:04] <Laurenceb> brushless
[00:04] <Laurenceb> same as on that
[00:05] <Ei5GTB_> hmnm, i see
[00:05] <Ei5GTB_> sparklfun?
[00:05] <Laurenceb> as I wasaying, you can mod the tower pro boards to use I2C
[00:05] <Laurenceb> ebay
[00:05] <Laurenceb> its the RC plane scene
[00:05] <Ei5GTB_> hmm
[00:06] <Laurenceb> very cheap
[00:06] <Laurenceb> tower pro boards are ~£3
[00:06] <Laurenceb> and motors are <£5
[00:07] <Laurenceb> http://www.rcgroups.com/forums/showthread.php?t=766589
[00:08] <Laurenceb> http://www.rcgroups.com/forums/attachment.php?s=b6bd5857ef694f7a69aaec06f9d96e0e&attachmentid=1554990 <-- basically you squirt some custom firmware onto the uC
[00:12] <Laurenceb> then you dont have to use goofy pwm
[00:12] <Ei5GTB_> aah..
[00:12] <Laurenceb> so you can have all your motors on one bus
[00:13] <Laurenceb> and after writing a driver its just set motor x to throttle y
[00:13] <Ei5GTB_> aww man
[00:13] <Ei5GTB_> nice
[00:14] <Ei5GTB_> omg, those motors are small, yet can draw like 20 amps
[00:14] <Laurenceb> you could even get back error reports/do self testing ect
[00:14] <Ei5GTB_> serious?
[00:14] <Ei5GTB_> nice..
[00:14] <Ei5GTB_> i must get one of them boards then
[00:14] <Laurenceb> yeah, all the firmware is open
[00:14] <Ei5GTB_> ones enough for all 4 motors?
[00:14] <Laurenceb> no
[00:14] <Ei5GTB_> 1 per motor..
[00:14] <Laurenceb> one per motor
[00:14] <Laurenceb> hence you need the bus
[00:14] <Laurenceb> so all the driver board live on one bus
[00:15] <Ei5GTB_> aaah, ok
[00:15] <Laurenceb> *boards
[00:15] <Ei5GTB_> thats why your modding them firmware
[00:15] <Ei5GTB_> i get it now
[00:15] <Ei5GTB_> http://cgi.ebay.ie/H206-EMAX-BL2215-20-Brushless-Motor-3D-Plane-Engine_W0QQitemZ150298461677QQcmdZViewItemQQptZUK_ToysGames_RadioControlled_JN?hash=item150298461677&_trksid=p3286.c0.m14&_trkparms=72%3A1301|66%3A2|65%3A12|39%3A1|240%3A1318
[00:15] <Laurenceb> yeah
[00:16] <Laurenceb> thats the sort of thing
[00:16] <Ei5GTB_> nice
[00:16] <Laurenceb> hmm 4Kg quadcopter :P
[00:16] <Ei5GTB_> lol!
[00:16] <Ei5GTB_> it might need to be to power those things
[00:16] <Ei5GTB_> need a flippin neuclear reactor..
[00:17] <Laurenceb> lipo cells
[00:17] <Ei5GTB_> i suppose im aiming at 1.5 - 2 kg
[00:17] <Laurenceb> its very easy with lipos
[00:17] <Ei5GTB_> and if those motorrs can give me 4800g of thrust..
[00:17] <Laurenceb> the biggest problem is attitude control by far
[00:18] <Ei5GTB_> its gonna be one heck of a machine!
[00:18] <Ei5GTB_> lol, i know
[00:18] <Laurenceb> the rest is just go it ebay, buy kit
[00:18] <Ei5GTB_> im trying to forget abvout it
[00:18] <Ei5GTB_> yea, and just fabricate the shell
[00:18] <Ei5GTB_> i designed it so i can move the cog
[00:18] <Laurenceb> or bolt to alu rods
[00:19] <Laurenceb> duck tape tronics in middle :P
[00:19] <Ei5GTB_> lol, naw, i manna make it look good as well as everything else
[00:19] <Ei5GTB_> then get a cool 2.4ghz 2way data stream going...
[00:19] Action: Ei5GTB_ drools
[00:19] <Laurenceb> there is one way to do this....
[00:20] <Laurenceb> nano itx motherboard
[00:20] <Ei5GTB_> get funding from nasa and do it right?
[00:20] <Ei5GTB_> hmmmm
[00:20] <Laurenceb> that will laugh at floating point
[00:20] <Ei5GTB_> that is a way....
[00:20] <Ei5GTB_> lol
[00:20] <Ei5GTB_> omg, that could be done..
[00:20] <Laurenceb> but its going to have to have an os
[00:20] <Ei5GTB_> what about io busses..
[00:20] <Laurenceb> and operating systems are laggy
[00:20] <Ei5GTB_> hmm, yea
[00:21] <Laurenceb> you can handle that with serial or something
[00:21] <Ei5GTB_> you think>
[00:21] <Laurenceb> serial - uC -- I2C bus
[00:21] <Ei5GTB_> hmm yea..
[00:22] <Laurenceb> but the os would be too laggy I think
[00:22] <Ei5GTB_> yea, naw, best to stick with uC i think
[00:25] <Ei5GTB_> all i know is.... its gonna be intesting
[00:25] <Laurenceb> yeah it may be fairly easy, I just heavent tried
[00:25] <Ei5GTB_> and educational on the most part for me.
[00:25] <Laurenceb> people at work use x86 with FPU for this
[00:25] <Ei5GTB_> heck, the thing could do as my final year project in college
[00:26] <Laurenceb> but they are not exactly practical for something like this
[00:26] <Ei5GTB_> yea
[00:26] <Ei5GTB_> wait, people at work? what you work at>?
[00:26] <Laurenceb> http://www.sstl.co.uk/ well I'm on a phd studentship
[00:27] <Ei5GTB_> omg
[00:27] <Ei5GTB_> neat
[00:27] <Ei5GTB_> haha, i worked it out, a shunt current on my uav could ber as much as 244 amp..
[00:31] <Laurenceb> http://cgi.ebay.ie/NEW-2850mAh-25C-30c-11-1v-Li-Po-LiPo-Battery-RC-11-1_W0QQitemZ220312164926QQcmdZViewItemQQptZUK_ToysGames_RadioControlled_JN?hash=item220312164926&_trksid=p3286.c0.m14&_trkparms=72%3A1301%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318
[00:33] <Laurenceb> two of those would do
[00:34] <Ei5GTB_> look good
[00:35] <Laurenceb> you could actually get 100A burst from one
[00:35] <Ei5GTB_> wow,
[00:35] <Ei5GTB_> what weight are they?
[00:35] <Laurenceb> it doesnt say
[00:35] <Laurenceb> I'd guess ~120 grams
[00:36] <Laurenceb> say 250 grams total for the two
[00:36] <Ei5GTB_> yea, so motors and batteries have me at say around .5kg
[00:36] <Laurenceb> omg
[00:36] <Laurenceb> just fly a laptop up with it
[00:36] <Ei5GTB_> haha
[00:37] <Ei5GTB_> but, i have 4.8 kg of lift at my fingertips
[00:37] <Ei5GTB_> or softwaretips
[00:37] <Laurenceb> seriously, you could have a little laptop stand in the middle
[00:37] <Ei5GTB_> haha
[00:37] <Laurenceb> webcam clipped on, then wifi
[00:38] <Ei5GTB_> thethings complicated enough as it is..
[00:38] <Ei5GTB_> eventually i would hope to have a datastream, that i can pout video into
[00:38] <Ei5GTB_> but figuring out flight controll is my main priority
[00:39] <Laurenceb> yeah
[00:41] <Ei5GTB_> lol, iv yet to lean embedded design ffs
[00:42] <Ei5GTB_> oh well, better go to bed
[00:42] <Ei5GTB_> night
[00:43] <Laurenceb> cya
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[09:50] <jcoxon> morning edmoore
[09:50] <edmoore> hello
[09:50] <jcoxon> you made me laugh on friday evening :-)
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[10:40] <rjharrison> moring all
[10:40] <rjharrison> The little one is asleep so I have an hours grace
[10:41] <jcoxon> haha
[10:48] <Ei5GTB_> morning
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[11:27] <edmoore> jcoxon: sorry i drifted off
[11:27] <edmoore> yes don't remind me too much of friday
[11:28] <jcoxon> its all in the logs :-)
[11:29] <edmoore> great
[11:30] <jcoxon> hehe
[11:30] <jcoxon> hows things then?
[11:30] <edmoore> not bad. went to the n-prize dinner last night
[11:30] <edmoore> very very nice indeed
[11:30] <jcoxon> oh cool
[11:30] <edmoore> a slightly cloudy head again this morning
[11:30] <jcoxon> :-)
[11:31] <jcoxon> were there lots of teams there?
[11:31] <edmoore> 4
[11:31] <edmoore> 17 peeps in total
[11:32] <jcoxon> cool
[11:34] <rjharrison> moring edmoore, I'm going to have to dash off to a playground in linconshire with the kids. intrigued as to what the friday logs hold. Fuzzylugnuts is another one for alcohol fulled chat.
[11:34] <rjharrison> Have a good hangover Sunday edmoore
[11:34] <edmoore> thanks
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[11:34] <edmoore> good luck with the playground
[11:35] <jcoxon> urgh we are in for some awful weather this week
[11:37] <edmoore> yeah it's dire
[11:37] <edmoore> orange jetstreams above us
[11:39] <jcoxon> fixed the shift problem on pegasus
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[12:50] <Ei5GTB_> ffs, just spent an hour watching rc vids on utube
[12:50] <Ei5GTB_> its a dam curse :P
[13:16] <edmoore> youtube is a curse
[13:22] <Ei5GTB_> i know :P
[13:23] <Ei5GTB_> how can someone give a thrust value in kg?
[13:24] <Ei5GTB_> shouldnt it be in Newtons?
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[13:44] <edmoore> Ei5GTB_: correct
[13:44] <edmoore> sloppy
[13:45] <Ei5GTB_> hmm, so... when im convertying to newtons... have they assumed G is 9.81?
[13:46] <Ei5GTB_> I.E 4KG = 4/9.81 = .4 NEWTONS?
[13:50] <edmoore> 4*9.81
[13:50] <edmoore> so ~40N
[13:50] <edmoore> wight = mg
[13:50] <edmoore> weight*
[13:51] <Ei5GTB_> shit... haha
[13:52] <Ei5GTB_> theres my problem..
[13:52] <Ei5GTB_> shugar, and iv gone and modeld my whole thing assuming less stress than is reall
[13:52] <Ei5GTB_> oops
[14:01] <edmoore> it's fun doing the sums :)
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[14:10] <Ei5GTB_> heh, yea
[14:11] <Ei5GTB_> my physics class is the only class i go into and enjoy!
[14:11] <Ei5GTB_> well, it aint too bad..
[14:11] <Ei5GTB_> it only takes me 5 mins to do the ecdl assignment, so i surf the net then
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[14:22] <edmoore> what's an ecdl assignment?
[14:24] <Ei5GTB_> (european computer driving licence)
[14:24] <Ei5GTB_> they baiscally terach you how to use microshaf office
[14:25] <Ei5GTB_> its a load of donkey bollox
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[20:21] <jcoxon> evening fnoble
[20:21] <fnoble> hi jcoxon
[20:29] <gordonjcp> evening
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[21:26] <EI5GTB> howdy
[21:27] <gordonjcp> hello
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[21:36] <EI5GTB> how are things this eve?
[21:37] <natrium42> watching the docking
[21:38] <natrium42> fixing my 8051 bootloader
[21:38] <natrium42> you?
[21:45] <EI5GTB> bugger all, just finishing up a drawing, and now gonna learn some morse
[21:45] <EI5GTB> just finished a gruelling essay on john keats poertry, makes me wanna friggin cry
[21:46] Action: EI5GTB points out he rather strongly dislikes school and the subsiquent pointless work
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[22:49] <laurenceb> hello
[22:51] <jcoxon> evening laurenceb
[22:52] <laurenceb> hi jcoxon
[22:52] <laurenceb> I've finished assembling the mini rogallo
[22:53] <laurenceb> it seems to want to fly, but I just need to check the trim before finally epoxying everything in place
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[22:58] <RocketBoy> yo chaps!
[22:58] <laurenceb> hi RocketBoy
[23:07] <jcoxon> hey RocketBoy
[23:10] <RocketBoy> Any of you guys remember Prof Chris Bishop at EARS?
[23:12] <RocketBoy> He was going to mentor Ian W next year I think.
[23:13] <RocketBoy> anyway he is giving a set of Royal Institution Christmas Lectures this year
[23:13] <RocketBoy> Keep an eye out for it on Channel 5 in December.
[23:14] <jcoxon> oh cool
[23:14] <jcoxon> RocketBoy, thanks for the tip on the shift issue, got it sorted
[23:15] <RocketBoy> spiffing - i thought that would be it
[23:15] <RocketBoy> I need to make the different argumanets for all of the modes a little less confusing
[23:15] <jcoxon> hehe
[23:15] <RocketBoy> one day when I jave the time (yeah right)
[23:15] <RocketBoy> have
[23:15] <jcoxon> what do you think about packet?
[23:16] <jcoxon> will the range be okay do you think?
[23:17] <RocketBoy> oh yeah should be of 100km+ - but best to alternate it with rtty though
[23:18] <jcoxon> okay
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[23:28] <RocketBoy> night
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[23:50] Nick change: laurenceb -> Laurenceb
[00:00] --- Mon Nov 17 2008