highaltitude.log.20101224

[00:00] <Darkside> cool
[00:00] <Darkside> oh man
[00:00] <Darkside> i should try and get hold of a plush tux
[00:00] <Darkside> and fly it
[00:01] <Darkside> might be able to auction it off at linuxconf for charity
[00:01] <DanielRichman> penguin <3
[00:01] <Darkside> hell, get a picture of it at 35km or so, same setup as the statue
[00:01] <Darkside> get a nice printout, and auction both the printout and the penguin off at the charity auction :D
[00:03] <Darkside> http://www.thinkgeek.com/geektoys/plush/288e/
[00:03] <Darkside> bah they only have the 12" version in stock
[00:05] <Darkside> anyway, back to christmas cooking
[00:06] <juxta> are you in tassie Darkside?
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[01:31] -:#highaltitude- [freenode-info] please register your nickname...don't forget to auto-identify! http://freenode.net/faq.shtml#nicksetup
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[06:56] <m1x10> Good morning!
[07:00] <Upu_> morning m1x10
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[07:41] <m1x10> ping fsphil
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[09:52] <fsphil> pong!
[09:56] <m1x10> :)
[09:56] <m1x10> I can't find a european shop to buy the 7.3mhz crystals
[09:56] <m1x10> can u help me ?
[09:57] <Darkside> buy elewhere?
[10:04] <m1x10> 3 shops in my city dont have them
[10:04] <m1x10> and they are the biggest ones
[10:04] <m1x10> on internet i found futurlec.com and mouser.com but they are in US and ask for >20$ shipping
[10:05] <m1x10> and my order is not going to be over 10$
[10:10] <fsphil> rapid online in the uk have them
[10:12] <fsphil> farnell have them too
[10:12] <m1x10> rapid online is a name?
[10:12] <fsphil> yea, www.rapidonline.com
[10:12] <SpeedEvil> http://cgi.ebay.co.uk/QUARTZ-CRYSTAL-7-3728MHz-Low-Profile-3-5mm-Lot-25-/230555181518?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item35ae28e1ce
[10:13] <fsphil> oh, yea and ebay :)
[10:13] <m1x10> lol
[10:14] <SpeedEvil> http://cgi.ebay.co.uk/2-Crystal-GaAs-Wafer-40mm-Polised-Both-Sides-Closed-/370429795248?pt=LH_DefaultDomain_0&hash=item563f561bb0
[10:17] <m1x10> is there any difference between those two that I cant see:
[10:17] <m1x10> http://uk.farnell.com/euroquartz/7-3728mhz-hc49-4h-30-50-40-18pf-atf/crystal-tht-7-3728mhz/dp/1640866
[10:17] <m1x10> http://uk.farnell.com/aker/ca-7-3728-18-3050-x/crystal-hc49-us-tht-7-3728mhz/dp/1538737?in_merch=true&MER=i-9b10-00001422
[10:20] <SpeedEvil> frequency stability marginally better on one
[10:21] <m1x10> which one?
[10:21] <SpeedEvil> err - no - they are the same
[10:21] <SpeedEvil> just different makers
[10:21] <m1x10> ok
[10:22] <m1x10> SpeedEvil: the crystals on ebay you gave me have min temp -10C
[10:22] <m1x10> those from farnell have -40C
[10:24] <SpeedEvil> I'm not pushing the ones from ebay - I just happened to notice
[10:24] <m1x10> ok
[10:25] <m1x10> Do u know what means the V --> ATMEGA644PV
[10:25] <fsphil> it'll be in the datasheet somewhere
[10:28] <SpeedEvil> probably RoHS
[10:29] <m1x10> ee
[10:29] <m1x10> I just got a mail from radiometrix
[10:29] <m1x10> but there isnt a radio module in the folder
[10:29] <m1x10> just a mail with the receipt
[10:29] <m1x10> not e-mail, normal mail
[10:30] <fsphil> yea, they send the invoice separately
[10:30] <m1x10> ffff
[10:30] <m1x10> I suppose the module will arrive sortly?
[10:30] <fsphil> likely
[10:31] <m1x10> can i use this invoice somehow?
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[10:31] <m1x10> i mean for taxes
[10:31] <m1x10> its not in euro but in pounds I think
[10:31] <fsphil> doubt it
[10:32] <m1x10> so why send it !
[10:33] <fsphil> all businesses send an invoice
[10:33] <m1x10> anyway
[10:33] <m1x10> I never paid attention to financial lessons
[10:33] <m1x10> neither Ill do in the future
[10:33] <fsphil> nor did the politicians :)
[10:33] <m1x10> I dont like economic knowledge
[10:33] <fsphil> or the bankers for that matter
[10:34] <m1x10> mv bankers politicians /dev/null
[10:35] <m1x10> fsphil you got the 10mhz 644p? or the 20mhz?
[10:35] <fsphil> it can do 20mhz, but I've only run it at 7.3
[10:35] <m1x10> so u think i should use a normal 20mhz?
[10:36] <m1x10> cause i found the 644p at 10mhz
[10:36] <m1x10> http://uk.farnell.com/atmel/atmega644pv-10pu/avr-mcu-64k-flash-4k-ram-spi/dp/1455124
[10:36] <fsphil> ah, the v probably means it runs at lower voltages
[10:36] <m1x10> yes it does
[10:36] <m1x10> min is 1.8v
[10:36] <m1x10> i suppose you run the 644p at 3v3. right?
[10:36] <fsphil> yea
[10:37] <fsphil> everything runs at 3.3v thankfully
[10:37] <fsphil> makes it a lot easier
[10:37] <m1x10> so u got a normal 20mhz running at 3v3 with a 7.3mhz crystal
[10:37] <fsphil> aye
[10:37] <m1x10> So i guess i dont need to buy a 10mhz 644p
[10:37] <m1x10> :p
[10:38] <fsphil> not unless you want a spare :)
[10:39] <m1x10> yes Im thinking of that
[10:39] <m1x10> but in he bank i just have 12 euro
[10:39] <m1x10> and if i will add an mcu in the order
[10:39] <m1x10> price gets 12pounds which i guess its more than 12 euro
[10:39] <fsphil> yep
[10:39] <m1x10> oh i have the shipping too :p
[10:40] <m1x10> something else
[10:40] <m1x10> you use the LD33v regulator?
[10:40] <fsphil> honestly not sure what regulator I have, found it in a drawer
[10:41] <m1x10> in any case I need a reg that i give it ~6v and outputs 3.3v
[10:41] <m1x10> right?
[10:41] <fsphil> you need an LDO regulator
[10:41] <m1x10> yes
[10:41] <fsphil> they should be fine with 4.3v or higher
[10:43] <m1x10> ok I got LD1117
[10:43] <m1x10> http://www.rapidonline.com/Electronic-Components/Integrated-Circuits/Voltage-Regulators-LDO/800mA-Low-drop-out-voltage-regulators-LD1117/34991
[10:43] <m1x10> low dropout outputting 3v3
[10:45] <fsphil> remember to get the capacitors
[10:46] <Darkside> if youre running it off batteries, then it diesnt matter so much
[10:46] <Darkside> the caps are more to get rid of PSU ripple... i've run stuff without them a lot
[10:46] <fsphil> ah, fair point
[10:47] <m1x10> mhh
[10:47] <m1x10> farnell asks for >20pounds for an order
[10:48] <Laurenceb_> surely theres somewhere in greece?
[10:48] <Laurenceb_> isnt the a local farnell site for eg
[10:50] <fsphil> oh, neat google logo today
[10:52] <m1x10> ohhh farnell has all countries except greece. OMG!
[10:52] <m1x10> even got bulgaria!
[10:53] <fsphil> http://www.darlas.gr/
[10:53] <fsphil> they sell farnells stuff
[10:53] <fsphil> I think :)
[10:55] <m1x10> i dont like this guy
[10:56] <m1x10> but he got the crystal!
[10:58] <m1x10> ok
[10:58] <m1x10> he asks for minimum of 70E for order
[10:58] <m1x10> everything sucks
[10:59] <m1x10> fsphil got a spare crystal? :p I can pay you the mail expenses :p
[10:59] <m1x10> I got 12E in paypal
[11:00] <m1x10> I can send you the expenses
[11:00] <m1x10> :p
[11:01] <fsphil> hmm.. needa check
[11:01] <m1x10> ok im here ! :P
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[11:26] <m1x10> brb, gonna buy milk !
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[11:53] <m1x10> I wonder if ozone O3 exists in my room
[12:12] <m1x10> ping fsphil
[12:12] <m1x10> tell me that knowledge about uploading program from avrdude
[12:23] <fsphil> woo, walked the dog -- took the flight computer, got a nice track on spacenear.us :)
[12:23] <Darkside> hahahaa
[12:25] <m1x10> woot?
[12:25] <fsphil> there are a few low parts I didn't expect it to work, but it tracked it all the way
[12:25] <fsphil> woof
[12:26] <m1x10> you got dog? what flight computer did u got? what track?
[12:26] <fsphil> lol
[12:26] <fsphil> http://spacenear.us/
[12:26] <m1x10> you laucnhed a balloon?
[12:27] <fsphil> nope, I walked it with the dog :)
[12:27] <fsphil> just a test
[12:27] <m1x10> lol
[12:27] <StrayVoltage> Hahah. :)
[12:27] <fsphil> I have to say, the accuracy is amazing
[12:28] <fsphil> I could loose a few decimal places in the coordinates and it would still be more than enough
[12:28] <m1x10> how can i see the path of hadie?
[12:29] <m1x10> i only see the blue line
[12:30] <fsphil> on the right you should see three payloads, on the hadie one click 'pan to'
[12:30] <fsphil> then zoom in
[12:30] <fsphil> it's the green track
[12:30] <m1x10> ah lol it was in US
[12:30] <m1x10> found you!
[12:30] <m1x10> and your dog!
[12:31] <m1x10> fsphil tell me that thing about uploading program
[12:31] <m1x10> without arduino
[12:31] <m1x10> something like that
[12:31] <Upu_> We have an iPhone app ready to go
[12:31] <m1x10> u said yesterday
[12:31] <Upu_> will post screen shots this afternoon
[12:32] Nick change: Upu_ -> [STAR]Atanyi
[12:32] <fsphil> you can compile your program into a hex file, and upload that with the programmer
[12:32] Nick change: [STAR]Atanyi -> Upu
[12:32] <fsphil> sweet
[12:35] <m1x10> how to compile it to hex?
[12:35] <m1x10> no need for bootloader then?
[12:36] <m1x10> im uploading through arduino
[12:36] <m1x10> it has .pde
[12:39] <m1x10> ok, its a big story
[12:41] <fsphil> don't do arduino, no idea
[12:50] <Laurenceb_> http://www.bbc.co.uk/news/science-environment-12074162
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[12:53] <Laurenceb_> its not got high efficiency cells
[12:53] <Laurenceb_> hes exaggerating
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[13:15] <Laurenceb_> Randomskk: table 23-5 in atmega168 datasheet - those triggering modes might be useful for BESC
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[14:19] <bcrosby> anyone have any numbers as the the level of accuracy of the CU predictor website?
[14:19] <eroomde> no
[14:19] <eroomde> i can do adjectives
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[14:19] <bcrosby> sorry ;)
[14:20] <bcrosby> let me rephrase.
[14:20] <bcrosby> Does snyone know how accurate the CU predictor website is?
[14:20] <eroomde> yes [CUSF person here]. It's accuracy is a function of two things
[14:21] <eroomde> 1) How long into the future you're asking it to predict
[14:21] <eroomde> 2) How accurate the input numbers you give are
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[14:21] <bcrosby> eroomde: thanks! I'm looking at a 2 day prediction window
[14:21] <bcrosby> (48 hours)
[14:22] <eroomde> If you get 2 accurate (i.e. you have a reliable filling strategy to nail ascent rate) and you do it say, 6 or fewer hours before launch, we've had it be as good as +/- 1km over a 120km flight.
[14:22] <bcrosby> oh nice
[14:22] <eroomde> at 2 days out I doubt your numbers would be as accurate as that
[14:22] <eroomde> sorry gtg
[14:22] <bcrosby> thanks
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[14:34] <eroomde> bcrosby: sorry, back now
[14:34] <eroomde> so, for 2 days out it's good enough
[14:34] <eroomde> to make a call. usually
[14:34] <eroomde> i.e. to say you're probably going to land somewhere in this woodland area between two towns, rather than the towns themselves
[14:37] <eroomde> usually the accuracy is better too if the forecast is less dramatic
[14:38] <eroomde> if it's all tumlutuous and the jet stream is flailing around like a scalded cat then you really need to be careful.
[14:38] <eroomde> bcrosby: where are you based, do you mind if I ask?
[14:42] <juxta_> hmm, merry Christmas from Australia
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[14:51] <eroomde> thanks juxta_
[14:51] <eroomde> and to you
[14:51] <eroomde> it's chaos at home
[14:51] <juxta_> :)
[14:51] <eroomde> mega preparations for tomorrow
[14:52] <juxta_> at least there's no snow here ;)
[14:52] <eroomde> there's a smattering here, but actually the last 3 days have been a lot calmer from the point of view of the weather
[14:52] <juxta_> oh good - are you in London?
[14:53] <eroomde> from my point of view, there are 28 people to feed tomorrow, and I've stupidly decided to do fresh bread all da so I'm baking like a b!tch at the moment
[14:53] <eroomde> just south of london - nearer brighton
[14:54] <juxta_> haha, wow, that does sound like a lot
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[14:54] <juxta_> did jcoxon go back home or is he still working?
[14:54] <eroomde> he mentioned he was working till about 4 i think
[14:57] <juxta_> hopefully gets some time off then
[14:59] <juxta_> I'd best to get to bed - busy day of eating at other peoples houses in the morning, I think I got off easy this time
[15:02] <juxta_> enjoy the rest of Christmas eve eroomde et al
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[15:14] <SpeedEvil> Showing possible ~20cm of snow here xmas morning.
[15:14] <SpeedEvil> http://www.yr.no/place/United_Kingdom/Scotland/Glenrothes/hour_by_hour.html
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[15:30] <natrium42> :(
[15:40] <laurence_> http://www.slackers.co.za/uploads/20101118/epic_wins_28.jpg
[15:42] <natrium42> your horse is amazing
[15:44] <SpeedEvil> It is obvious that this notification will come to you as a surprise but please find time to read it carefully as we congratulate you over your success in the following official publication of results of the E-mail electronic online Sweepstakes organized by Microsoft, in conjunction with the foundation for the promotion of software products, (F.P.S.)
[15:44] <SpeedEvil> held December 2010, in London United Kingdom. Where your email address emerged as one of the online Winning emails in the 2nd category and therefore attracted a cash award of 850,000.00 {Eight Hundred and Fifty Thousand Great British Pounds Sterling's}.
[15:45] <SpeedEvil> Well - that's nice of them.
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[16:15] Nick change: laurence_ -> Laurenceb_
[16:15] <Laurenceb_> http://gsmserver.com/shop/equipment/soldering_sssembly/hot_tweezers/aoyue_hhl3000_5_stage_fully_programmable_rework_reflow_oven.php
[16:16] <natrium42> is it better than the cheap ebay ones?
[16:19] <Laurenceb_> dunno, thought it was cheapish
[16:26] <Laurenceb_> http://cgi.ebay.com/Infrared-Bulb-BGA-Rework-Station-T-862-T-862-/190481716919?pt=LH_DefaultDomain_0&hash=item2c599856b7
[16:26] <Laurenceb_> nice didnt realise you could get tohse
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[16:35] Nick change: SpeedEvil1 -> SpeedEvil
[17:06] Action: Laurenceb_ has active antenni working
[17:06] <SpeedEvil> :)
[17:06] <SpeedEvil> Congrats.
[17:06] <Laurenceb_> ive added an "antenni supervisor" to the sdr that detects an active antenni and turns on the bias voltage
[17:07] <SpeedEvil> What sort of gain?
[17:07] <Laurenceb_> still need to tune the ant properly and do range tests
[17:07] <Laurenceb_> but its way to cold to go out in the garden atm
[17:07] <SpeedEvil> You killed the oscillation though?
[17:07] <Laurenceb_> seem to - im just looking at the current draw now
[17:08] <Laurenceb_> it needs proper range tests to see if its causing any issues still
[17:08] <SpeedEvil> Great.
[17:08] <Laurenceb_> theoretically 13.8dBi gain and 0.6dB noise figure
[17:09] <Laurenceb_> so insane performance, but need to see if thats true in reality
[17:10] <Laurenceb_> it should annihilate the competition in most specs - the only issue is the analogue front end bandwidth of 160KHz, so strong interference in that band can make it go screwy
[17:10] <SpeedEvil> Better now though.
[17:10] <SpeedEvil> Cryogenics always helps.
[17:10] <Laurenceb_> heh
[17:11] <SpeedEvil> Awww. I was forecast 20cm of snow xmas 1AM-6AM - but it's gone away in the update
[17:11] <Laurenceb_> theres quite a few dirt cheap ism transceiver ics with the same architecture but may more hackable
[17:11] <SpeedEvil> Just a dusting now
[17:11] <Laurenceb_> maxim make one that needs external SAW filters
[17:11] <SpeedEvil> The cc* looks fine for a proof of concept
[17:11] <Laurenceb_> its be easy to hack some adc on there
[17:12] <SpeedEvil> Can you get in-band SAW filters?
[17:12] <SpeedEvil> As in ~160khz wide
[17:12] <Laurenceb_> maybe, but the cc will do 400 to 470mhz which is nice to have
[17:12] <SpeedEvil> true
[17:12] <SpeedEvil> AFK - tidying up before visitors. Nice it's working. :)
[17:13] <Laurenceb_> have fun
[17:13] <fsphil> apex is launching in the new year, so hopefully you can test it then on a moving target :)
[17:16] <jonsowman> with any luck
[17:16] <jonsowman> given time & weather
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[18:27] <m1x10> Hi all
[18:28] <SpeedEvil> hi
[18:28] <SpeedEvil> http://www.youtube.com/watch?v=UGquX-SQtZA
[18:28] <SpeedEvil> Ok - this is bad. But strangely catchy.
[18:29] <SpeedEvil> Basshunter - Jingle all the way.
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[18:30] <natrium42> is it new?
[18:31] <natrium42> boten anna is the best song ever
[18:31] <SpeedEvil> ~4yo
[18:35] <m1x10> Hi natrium42!
[18:35] <m1x10> Have I sent you my army epic picture?
[18:35] <natrium42> nope
[18:35] <natrium42> omg, pix
[18:35] <natrium42> :D
[18:36] <m1x10> wait
[18:36] <m1x10> http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs1188.snc4/151065_1511949483509_1377549819_1223462_3443505_n.jpg
[18:36] <m1x10> :p
[18:36] <SpeedEvil> Is this another in the 'm1x10 stands next to large military hardware in the snow' series?
[18:36] <SpeedEvil> ah - same one.
[18:36] <SpeedEvil> :)
[18:36] <m1x10> hahahaha
[18:36] <natrium42> hardcore
[18:36] <natrium42> but this is not greece
[18:37] <natrium42> there is snow
[18:37] <m1x10> lol
[18:37] <m1x10> it is
[18:37] <m1x10> mountain :)
[18:37] <natrium42> ah
[18:37] <m1x10> we had this snow for 1 week
[18:37] <m1x10> no one was coming to see if we are ok
[18:38] Action: SpeedEvil wonders how long.
[18:38] <m1x10> so we started playing instead of guarding :p
[18:39] <m1x10> http://sphotos.ak.fbcdn.net/hphotos-ak-ash2/hs588.ash2/151065_1511949523510_1377549819_1223463_6690136_n.jpg
[18:39] <m1x10> same place but previous day before snow
[18:39] <m1x10> -7C
[18:39] <m1x10> too cold for mixio
[18:39] <m1x10> :(
[18:40] <natrium42> happy XpucToc-mas :P
[18:40] <m1x10> wtf
[18:40] <m1x10> :p
[18:40] <SpeedEvil> Closing on a month of lying snow
[18:40] <SpeedEvil> here
[18:40] <m1x10> lol
[18:41] <m1x10> im not used to much snow
[18:41] Action: SpeedEvil needs to get his insulation sorted.
[18:41] <natrium42> UK will be pwned pretty badly soon anyway, once the gulf stream is messed up
[18:41] <SpeedEvil> If it does, yes.
[18:42] <SpeedEvil> Though truly stopping would take a _long_ time
[18:42] <m1x10> Hey
[18:43] <m1x10> Single axis gyroscope LISY300AL doing the Z axis
[18:43] <m1x10> does it matter how i have the gyro in the payload?
[18:44] <m1x10> looking vertical or horizontal?
[18:44] <SpeedEvil> they do different things
[18:45] <SpeedEvil> this is in a balloon?
[18:45] <SpeedEvil> payload
[18:45] <m1x10> yea
[18:45] <m1x10> i want to measure the spinning of the payload
[18:45] <SpeedEvil> with the axis vertical, you will detect rotation about the swing
[18:45] <SpeedEvil> about the string
[18:45] <m1x10> how i know where the axis is looking?
[18:45] <SpeedEvil> with it horizontal, you detect either north-south, or east-west 'pendulumn' swing
[18:45] <SpeedEvil> read the datasheet
[18:45] <m1x10> the chipset?
[18:46] <m1x10> mhh
[18:46] <SpeedEvil> It will have a diagram with an arrow
[18:46] <m1x10> yes it has a circlying arrow
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[18:47] <m1x10> if i place it just normal it will count the vertical?
[18:47] <m1x10> http://www.sparkfun.com/products/8955
[18:47] <m1x10> look the pic
[18:48] <m1x10> if i have it sitting like that
[18:48] <m1x10> that will count the payload spin?
[18:48] <m1x10> in vertical axis
[18:48] <m1x10> ?
[18:48] <m1x10> brb christmas food
[18:48] <SpeedEvil> It detects spin aroudn the pins
[18:48] <SpeedEvil> wave
[18:48] <SpeedEvil> In the plane of the chip
[18:49] <SpeedEvil> If you rotate it so you can always see the letters, it picks up that rotation
[18:53] <SpeedEvil> http://www.sciencedaily.com/releases/2010/12/101222071831.htm
[18:53] Action: SpeedEvil sighs at the quality of science journalism.
[18:53] <SpeedEvil> Trinitramid is the name of the new molecule that may be a component in future rocket fuel. This fuel could be 20 to 30 percent more efficient in comparison with the best rocket fuels available today,
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[19:13] <Upu> http://www.youtube.com/watch?v=mSoPJevJyeE&feature=player_embedded#!
[19:16] <m1x10> SpeedEvil: yes
[19:16] <m1x10> if i place it in the payload like its on the pic
[19:17] <m1x10> it will measure how the payload turns
[19:17] <m1x10> in the vertical axis
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[19:27] <m1x10> Now they only components that work at 5v is the humidity sensor and the O3 sensor
[19:27] <m1x10> Also
[19:27] <m1x10> I got another question
[19:28] <Laurenceb_> lol efficient
[19:28] <m1x10> I have 4 AA in serial providing ~6v
[19:28] <m1x10> lithiums 3000mah
[19:29] <m1x10> i want to increase the capacity
[19:29] <m1x10> can i do
[19:29] <m1x10> :
[19:29] <m1x10> (4AA in serial) + 1AA in paraller
[19:29] <m1x10> so i get 6v and 3000mah
[19:29] <m1x10> sory
[19:29] <m1x10> 6000mah
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[19:35] <DanielRichman> m1x10: I don't think so. I think that if that worked you'd be able to build a perpetual motion machine and violate quite a few laws
[19:35] <DanielRichman> I think it might just explode.
[19:38] <m1x10> eerr
[19:38] <m1x10> lol
[19:38] <m1x10> i sew some tutorials saying that you can combine serial + paraller
[19:38] <m1x10> to increase both element
[19:38] <m1x10> voltage and capacity
[19:40] <DanielRichman> Don't you have to do (4 AA in series) and (4 AA in series) in paralell
[19:41] <m1x10> http://docs.google.com/viewer?a=v&q=cache:rm4IvnxHVCIJ:www.nyc-arecs.org/Connecting_Batteries_and_Chargers_in_Series_and_Parallel.pdf+parallel+and+serial+connected+batteries&hl=en&pid=bl&srcid=ADGEESj1_MsQjybig2Rupxxy9Yf4UXvg7-w_qJbHAd3VzFMbdliCgJ2jJB6zjqunwtbxEGBQh6SMip4d61U16TZty0-Bqj7tAO-jXhejP43xU6w56ZDyKMDGyNpns1WzZLx-JQxmEbyL&sig=AHIEtbTzXp2voU0J59yVgEMuwsqz4wz1MQ
[19:41] <m1x10> sory for big link
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[19:41] <m1x10> ah so the numbers must be equal
[19:42] <m1x10> 8 batteries mhhh :(
[19:42] <m1x10> i can fit 2 more AAs in my 10x10 pcb surface :(
[20:01] <m1x10> what can I do to provide 5v from 3v3 ? Im desparate!
[20:07] <m1x10> step up converter?
[20:08] <m1x10> http://www.sparkfun.com/products/8999
[20:09] <m1x10> is that going to eat the batteries?
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[20:20] <SpeedEvil> at what current?
[20:20] <m1x10> what do u mean ?
[20:20] <SpeedEvil> What current at 5v
[20:21] <SpeedEvil> the answers are differnet at 1mA and 1KA
[20:21] <m1x10> the humid sensor draws microA
[20:21] <m1x10> 200¬ľA
[20:21] <SpeedEvil> I'd go with a lithium coin battery to make 6V, and a 5V reg
[20:22] <m1x10> what?
[20:22] <m1x10> add a lithium coin and a 5v ldo ?
[20:23] <m1x10> fff adding too many components :(
[20:25] <m1x10> is there any cheap 3v3 humid sensor?
[20:25] <m1x10> up to 15$ eg
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[20:27] <SpeedEvil> A lithium coin cell is almost $0, weighs nothing
[20:28] <m1x10> its takes up space with the reg on th epcb
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[20:31] <SpeedEvil> As to the sparkfun thingy - go and look at the quescent current - this is how much it'd drain from your bats
[20:31] <m1x10> it says 200microAmp
[20:31] <m1x10> http://www.sparkfun.com/products/9569
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[20:31] <m1x10> just 17$
[20:32] <m1x10> strange that i cant find a 3v3 at the same price
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[20:57] <m1x10> hmmm
[20:57] <m1x10> I got an idea
[20:57] <m1x10> from the raw ~6v straight for the batteries
[20:58] <m1x10> i can put a diode to drop the voltage to 5v
[20:58] <m1x10> can i do that?
[21:01] <SpeedEvil> no
[21:02] <SpeedEvil> Because it will vary from ~7 to ~4 depending on state of charge
[21:04] <m1x10> mhh
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[21:34] <Upu> http://ava.upuaut.net/?p=83
[21:34] <Upu> iPhone based chase car tracker updater
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[21:37] <Upu> evening jcoxon
[21:38] <Upu> http://ava.upuaut.net/?p=83 if you have an iPhone
[21:38] <jcoxon> evening
[21:38] <jcoxon> sadly not
[21:38] <jcoxon> android
[21:38] <Upu> he's probably going to port it
[21:42] <jcoxon> cool cool
[21:42] <jcoxon> hows everyone
[21:42] <Upu> ready for some serious not getting up in the morning and deicing my car
[21:42] <Upu> be nice to get some time off
[21:42] <jcoxon> haha
[21:43] <jcoxon> 4 days off?
[21:43] <Upu> yeah
[21:43] <jcoxon> :-)
[21:43] <Upu> unfortunately my car has gone in for a service
[21:43] <Upu> and I have a very nice A4 courtisy car that sadly feels like it has ice for tyres
[21:43] <Upu> its just a nightmare in this slush
[21:44] <Upu> on the plus side the excess is less than mine
[21:44] <Upu> courtesy even
[21:45] <jonsowman> that app looks neat!
[21:45] <jonsowman> very nice work :)
[21:45] <Upu> not me
[21:45] <Upu> one of my engineers at work
[21:46] <jonsowman> oh okay
[21:46] <jonsowman> still, lookg really good
[21:46] <jonsowman> *looks
[21:46] <Upu> getting there
[21:46] <Upu> it works
[21:46] <Upu> just needs tarting up
[21:47] <Upu> if someone sees him tell him I'm after some balloons, I have mailed him but no response yet
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[22:12] <jcoxon> oh i've added rig control to dl-fldigi
[22:14] <jcoxon> but it doesn't work well on linux
[22:14] <jcoxon> needs more investigation
[22:15] <jonsowman> oh nice, what's been changed?
[22:17] <jcoxon> oh just added in freq control
[22:17] <jcoxon> simple change
[22:17] <jonsowman> :)
[22:17] <jcoxon> but i think i need to make some adjustments - works fine on os x
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[22:23] <jonsowman> fair enough
[22:23] <jcoxon> would appreciate people to have a go
[22:23] <jcoxon> don't have a linux box to fix it on
[22:23] <jcoxon> (well i don't have one with me right now)
[22:26] <jonsowman> i'll give it a go on ubuntu tomorrow
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[00:00] --- Sat Dec 25 2010