highaltitude.log.20100924

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[10:23] <Laurenceb> hi
[10:23] <Stratisphere> yo
[10:24] <Randomskk> heya
[10:28] <EI5GTB> yo guys.. long time no chat
[10:38] <m1x10> hi
[10:56] <Laurenceb> i thought of a good idea for ANC
[10:56] <Laurenceb> use two cc receivers, one with a whip and one with a yagi
[10:57] <Laurenceb> then put the data into an ANC
[10:57] <Laurenceb> it should supress the sidelobes of the yagi by miles
[10:59] <Laurenceb> simple to make as well - i have two cc1020 boards
[11:09] <EI5GTB> Or... get a pitch fork, and use it to fling dung over lighthouses...
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[12:33] <Laurenceb> anyone familar with windows
[12:33] <m1x10> :p
[12:33] <Laurenceb> how do you close a com port without having acess or knowing which application opened the port
[12:34] <Laurenceb> windows7
[12:34] <Laurenceb> without restarting
[12:34] <m1x10> oh
[12:35] <m1x10> i remember there is a small utitity that shows you which port is being used by a process. Then you simply shutdown that process.
[12:35] <Stratisphere> Laurenceb generally if you wait a little bit it'll free up
[12:36] <Stratisphere> otherwise processmon by sysinternals can do it iirc just search for it in the open handles
[12:38] <m1x10> http://technet.microsoft.com/en-us/sysinternals/bb795533.aspx
[12:38] <m1x10> Process Explorer
[12:38] <m1x10> Process Monitor
[12:38] <m1x10> try those
[12:55] <Darkside> fuuuuu this is annoying....
[12:55] <Darkside> for some reason the timing on my RTTY code has just gone out slightly
[12:55] <Darkside> also avr-gcc has a bug
[12:55] <Laurenceb> w=hat?
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[12:56] <Darkside> when you try and use strtod, or atof, it stuff up
[12:56] <Darkside> and throws an error about libc.a
[12:56] <Randomskk> is that avr-gcc having a bug, or you not linking to correct libraries?
[12:57] <Darkside> you can 'fix' the problem by addind -lm to the end of the linker line in the makefile
[12:57] <Darkside> but i think that may be the reason behind my RTTY problems, since i only started having troubles since using -lm
[12:57] <Darkside> (.text.avr-libc.fplib+0x0): multiple definition of `__ltsf2'
[12:59] <Randomskk> -lm makes it link against the maths library
[12:59] <Darkside> yes
[12:59] <Darkside> AHA
[13:00] <Darkside> i just removed all the stuff using atof, and now RTTY works again...
[13:00] <Darkside> fffs
[13:00] <Darkside> am i going to have to write my own implementation of atof for this to work...
[13:00] <Darkside> urgh
[13:02] <Randomskk> try the string functions
[13:02] <Randomskk> sscanf say
[13:03] <Darkside> ok
[13:04] <Darkside> sscanf?
[13:04] <Randomskk> it's like printf but backwards
[13:05] <Darkside> heh
[13:05] <Darkside> other option is to look at some other NMEA parsing libraries
[13:05] <Darkside> for ones tht do string rearrangeing without convertint the value to a double first
[13:06] <Randomskk> tinygps or something has been used before
[13:07] <Darkside> i'm not using an arduino
[13:08] <Randomskk> I see
[13:08] <Randomskk> what are you using?
[13:08] <Darkside> an xmega
[13:08] <Randomskk> I don't see why tinygps wouldn't work.
[13:08] <Darkside> i could port it..
[13:08] <Darkside> it would mean mixing c++ and c code
[13:08] <Randomskk> does it read the serial port directly?
[13:08] <Laurenceb> sscanf can hang
[13:08] <Laurenceb> theres lots of code on the wiki
[13:09] <Darkside> Randomskk: i can get to the point of having the NMEA string ready for parsing
[13:09] <Darkside> after that is where it gets interesting
[13:09] <Laurenceb> http://ukhas.org.uk/general:code
[13:09] <Randomskk> Darkside: I thought tinygps parses the char by char data you feed it.
[13:09] <Randomskk> but yes, c++
[13:09] <Laurenceb> http://ukhas.org.uk/code:interrupt_driven_nmea
[13:09] <Randomskk> you could write your own nmea state machine
[13:10] <Randomskk> or use any of that excellent code on the wiiki
[13:10] <Darkside> http://ukhas.org.uk/code:interrupt_driven_nmea
[13:10] <Darkside> woah
[13:11] <Darkside> woah mfsk-64 code
[13:12] <Darkside> static u08 GGA;
[13:12] <Darkside> wha?
[13:12] <Darkside> is that just the same as uint8_t?
[13:13] <Darkside> also Laurenceb theres code missing from that - i.e. where's the gps_type defined
[13:14] <Laurenceb> http://ukhas.org.uk/code:i2c_ubx
[13:14] <Laurenceb> try the header from there
[13:16] <Darkside> ypedef unsigned char u08;
[13:16] <Darkside> ugh
[13:16] <Darkside> WHY
[13:18] <Laurenceb> simple to write
[13:20] <Darkside> heh..
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[17:21] <rjharrison> Evening all
[17:22] <rjharrison> Been filming with the BBC today for local program
[17:23] <SpeedEvil> :)
[17:26] <meefs> cool
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[17:34] <SpeedEvil> Insane.
[17:34] <SpeedEvil> AD mailed me today about their 16 bit 105MHz ADCs
[17:38] <DagoRed> those sound fun
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[18:13] <griffonbot> @nearsys: The NearSpace UltraLight kit is complete. I tested the flight computer this morning and am happy wth the results. #ARHAB [http://twitter.com/nearsys/status/25427304510]
[18:14] <griffonbot> @nearsys: The UltraLight is a simple, programmable flight computer for near spacecraft. I have notes on my blog, nearsys.blogspot.com. #ARHAB [http://twitter.com/nearsys/status/25427372834]
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[19:51] <Laurenceb> hi
[19:51] <SpeedEvil> hi
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[19:54] <Laurenceb> http://i.imgur.com/NXaBW.jpg
[19:55] <Laurenceb> http://i.imgur.com/wX5kF.jpg
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[20:01] <Laurenceb> I've got 14 :D
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[21:01] <Laurenceb> SpeedEvil: want any of the pcbs?
[21:01] <Laurenceb> i have quite a few spare now
[21:14] <fsphil> heh, linked from slashdot today: http://yayeveryday.com/post/4330
[21:14] <fsphil> wish I could do something like that at work :)
[21:20] <SpeedEvil> Laurenceb: of the pilot?
[21:21] <SpeedEvil> Practically, I'm unlikely to do anything with it.
[21:21] <SpeedEvil> :(
[21:22] <SpeedEvil> They look good?
[21:33] <Laurenceb> very good quality
[21:34] <Laurenceb> unfortunately they used 1.6mm board and plated the mount holes
[21:34] <Laurenceb> which wasnt what i asked for
[21:34] <SpeedEvil> why unfortunately?
[21:34] <Laurenceb> i asked for 0.8mm and unplated mount holes
[21:35] <Laurenceb> i guess they cant read english at the factory
[21:35] <SpeedEvil> Should it work - there are no striplines?
[21:35] <Laurenceb> in future ill send the gerbers to the sales info email with the instructions
[21:35] <Laurenceb> no - actually impedance matching will be a bit better
[21:35] <Laurenceb> less parasitic capacitance
[21:36] <Laurenceb> but there may be more RF leakage and itll be heavier
[21:36] <SpeedEvil> you were looking for less weight?
[21:36] <Laurenceb> mainly RF leakage is what i was worried about
[21:36] <Laurenceb> the weight isnt a big beal and its stronger
[21:37] <Laurenceb> theres 5 e tested boards and apparently they fab 15
[21:37] <SpeedEvil> Got the other parts?
[21:37] <Laurenceb> so looks like i have around an 80% sucess rate with the manufacture
[21:37] <Laurenceb> only the gps so far
[21:37] <Laurenceb> not 100% sure if ill make up these boards fully
[21:38] <Laurenceb> or go for version 2
[21:38] <SpeedEvil> what's V1->v2
[21:38] <Laurenceb> the lsm303dlh footprint is rather nasty - the pads are a bit too close
[21:38] <Laurenceb> id like to change that as well, but it can probably be soldered as it is with flux + hot air tool
[21:39] <SpeedEvil> ah.
[21:39] <Laurenceb> ublox6, dual ants with UFL connectors
[21:40] <SpeedEvil> I suppose the parts are lots more expensive than the boards.
[21:42] <Laurenceb> yes, but customs is a pita
[21:42] <SpeedEvil> Oh - right
[21:42] <Laurenceb> need to ring them up and argue - they have charged me about double what they should
[21:42] <SpeedEvil> Why double?
[21:43] <Laurenceb> you can hardly blame them - theres different taric codes for pupulated vrs unpopulated boards ffs
[21:43] <Laurenceb> also if its passive or active components
[21:43] <SpeedEvil> Insane.
[21:43] <SpeedEvil> :/
[21:44] <Laurenceb> you look up the taric code for the product, put it into the database with the coutry of origin code, then out pops a percentage
[21:44] <Laurenceb> then thats compounded with the VAT
[21:44] <Laurenceb> it can easily end up being an insane charge
[21:45] <Laurenceb> luckly all my good are 0%
[21:45] <Laurenceb> general electronics stuff is usually 7% to 10% if its from china, thats what they put it down as
[21:46] <Laurenceb> but actual unpopulated boards, lipo cells and alu enclosures have taric enterise that give 0%
[21:46] <Laurenceb> so ill argue my case
[21:46] <Laurenceb> bbl
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[22:03] <SpeedEvil> Good luck. Fighting with another arm of government - benefits agency - ATM.
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[22:28] Action: SpeedEvil goes back to rooting his kindle.
[22:30] <Laurenceb> im off, cya
[22:30] <SpeedEvil> Good luck.
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[22:45] <jcoxon> evening
[22:53] <Upu> evening
[22:53] <jcoxon> see the automonous boat on hackaday?
[22:53] <Upu> saw it not read it yet
[22:58] <fsphil> ah, that's the boat I've been following -the one that broke and is drifting :)
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[00:00] --- Sat Sep 25 2010