[00:02] hmm [00:02] how to leave a msg [00:02] aha [00:03] done [00:06] SpeedEvil (~user@tor/regular/SpeedEvil) left irc: Quit: Leaving. [00:06] SpeedEvil (1000@tor/regular/SpeedEvil) joined #highaltitude. [00:32] http://www.w0otm.com/iHAB/iHAB-2/Launch-Photos.html [00:34] Flight today? [00:34] yesturday [00:34] Aha. [00:34] Pictures look great. [00:35] thx [00:36] Not sure if NV1K has been spreading the word, but we're going for an altitude record this week. [00:37] I mentioned something in #hamradio kd0fxp [00:37] Good luck guys! [00:37] ill be rooting for you [00:38] It's nice now that I have a new program written up that looks at the GFS winds predictions for a weeks time...then runs a prediction on each one [00:39] I'll throw it out for download once I get a GUI put togeather [00:39] It is pretty handy. [00:41] awesome! [00:43] I hop to have a bot whipped up so we can post the APRS data in #sscl but given how busy I am lately, don't rely on it. [00:54] darknesslord_ (~darknessl@189.164.11.125) left irc: Quit: darknesslord_ [01:12] natrium42 (natrium42@CPE000625d867e2-CM0014045885be.cpe.net.cable.rogers.com) left #highaltitude. [01:22] doughecka (~Tad@74-143-13-162.static.insightbb.com) left irc: Read error: Connection reset by peer [01:22] doughecka (~Tad@74-143-13-162.static.insightbb.com) joined #highaltitude. [01:35] LA3QMA (~kgb@150.120.189.109.customer.cdi.no) left irc: Ping timeout: 245 seconds [02:09] Tekin (~Tekin@CPE0013f7abb29c-CM0013f7abb298.cpe.net.cable.rogers.com) joined #highaltitude. [02:09] hi, anyone active here [02:09] Nick change: madEngineer -> nv1k [02:09] not really [02:09] shh [02:10] :) [02:10] well I have something that puzzles me [02:10] go on... [02:10] I get the idea of setting up a radio between the payload of the HAB and the computer [02:10] yes [02:10] you can also use a wire. [02:10] but what I don't get is how to transfer all the data I want, to the computer (I want shitloads of things) [02:10] a 20 mile wire [02:11] very thin wire :) [02:11] what sort of things? [02:11] 9600 baud is pretty quick for most things [02:11] Range goes down as baud goes up. [02:11] yes [02:11] not only do I want temperature (x2) pressure [02:12] besides all those usual stuff, I want to be able to control things from my computer [02:12] what kind of things? [02:13] hmm for example cutting the rope to the balloon over the computer when necessary [02:13] bidirectional is harder [02:14] cutting the rope is quit easy [02:14] *quite [02:14] if you have relatively few commands you could get away with DTMF [02:15] yeah just a couple [02:15] that's how ArgentData controls their simplex repeater system [02:16] but mostly, I will want GPS signals continuously transmitting to my computer, temperature readouts indoor and outdoor, pressure, altitude, magneto [02:16] thats not really an entirely huge amount of data [02:17] but continuous transmission would be a drain on the batteries [02:17] not a problem [02:17] I'll put thousands of them if necessary [02:17] umm...weight issues come to mind with that... [02:17] if not continuous, once every 15-30 seconds is good enough for me [02:18] whats the FAA weight limit? [02:18] slothearn (~Christine@pool-98-111-116-30.hrbgpa.fios.verizon.net) joined #highaltitude. [02:18] especially if every 30 seconds, that is no problem at all [02:18] Tekin: In the UK we send on 433MHz and 10mW [02:18] ok, 15 sec is a big difference from continuous lol [02:18] Basically continually at 50bps [02:18] oh and also, for every battery pack, I want batter status readouts [02:19] voltage and percentage [02:19] yeah - easy [02:19] SpeedEvil: easy for you, I've never done this before [02:19] FAA is 6 pounds without reporting it...I think up to 12max without a time consuming waver [02:19] waiver* [02:19] will the FAA actually approve things >12 lbs.? [02:19] http://ukhas.org.uk/guides:tracking_guide [02:19] yes [02:19] if you have microcontroller experinece, it's cake [02:20] we have flown 40+ payloads before [02:20] nice :O [02:20] 40+ lbs [02:20] that's 2.72 killograms... I'm gonna shoot this thing off Turkey so I can prolly bring it up even more [02:21] I can write the software, as long as I can connect and send the data to the computer and learn the API to get the data out of there to parse it [02:21] but I need to know how to connect the pieces [02:22] do you have a TNC or something similar already? [02:22] nope [02:22] make a shopping list :) [02:22] that's easy [02:23] how am I going to connect the batteries, temperature things to the radio? I read the tutorial on sparkfun [02:23] wasn't much of a tutorial though :P [02:23] more like an info thing [02:23] you jam a microcontroller in the middl [02:23] if you use something like the open tracker [02:23] e [02:24] you can almost directly connect 5 analog sensors [02:27] I'm having a look at sparkfun now [02:32] anybody got pics from their launches? [02:34] http://picasaweb.google.com/kb0mgq/LX109B02# [02:36] anyways thanks a lot [02:36] yea these look like extremely fun projects :O [02:38] Tekin (Tekin@CPE0013f7abb29c-CM0013f7abb298.cpe.net.cable.rogers.com) left #highaltitude. [02:43] My motorcycle! http://picasaweb.google.com/kb0mgq/LX109B02#5473484194421660994 [02:44] vroom! [02:44] Zuph (~Zuph@69.64.6.67) left irc: Ping timeout: 245 seconds [02:46] Sorry, I <3 my bike. Anyway.... [02:58] wat the fuck [02:58] how do you guys do that [02:59] should smuggle drugs on those things [02:59] o-O [03:01] androoid: What? How do we do what? [03:04] just kidding guys [03:04] howh do you guys know how to do this kinda stuff [03:05] flip coins mostly [03:05] You can ask us. #sscl [03:05] occasionally apply laws of physics [03:07] hm intesreting [03:07] Action: slothearn smells a troll :P [03:07] well i just got into electronics [03:07] this is fun stuff [03:08] it is fun [03:08] slothearn: i'm not a troll, just cynical lol [03:08] very, and it's nice that the school pays for our toys :) [03:08] nv1k: lol nah, I meant androoid [03:08] hm [03:08] DagoRed: lucky [03:08] i wanan goto the school [03:08] what school you goto [03:08] if I wanna do this it'll be out of pocket for sure [03:08] ah [03:15] is iowa state a good school? [03:17] depends what you want out of it. [03:17] looking to do EE [03:17] I can say both fuck yeah and hell no. [03:17] Action: DagoRed just graduated in EEE [03:17] *EE [03:17] oh nice [03:17] yeah i just finished up cs [03:17] what part of EE? RF? Controls? VLSI? [03:17] but cs is kinda boring [03:18] you know i'm not too sure [03:18] Heh, CS majors always make me laugh. [03:18] congrats btw, DagoRed [03:18] Are you looking for a masters or double degree. [03:18] most likely masters [03:18] slothearn: I wouldn't say that, I'm grad school now in aerospace. [03:18] Same school though. [03:18] well that's worth a congrats, isn't it? :P [03:18] i want to do combine my cs with ee, i like the whole gps field [03:20] slothearn: I guess, it's just I haven't really felt like anything changed so... I'm either humble or numb as a result. [03:20] that would be cpre [03:21] androoid: Do EE, you can assume what happens in the middle. [03:21] yeah [03:21] The last chair of the EE department never took a ComputerE class and teaches mostly CprE classes as well as mostly published in CprE topics. [03:25] welp, I'm out. [03:25] got work tomorrow [03:25] slothearn (~Christine@pool-98-111-116-30.hrbgpa.fios.verizon.net) left irc: Quit: 'night all [03:27] androoid: Unless you really feel like you need a masters, don't go for one. If you want to learn EE for a specific reason, go for it. Just be warned it's hard, and all the fun stuff isn't taught in the courses very well. [03:27] Action: nv1k can't wait for grad school [03:28] oh man haha yeah thats the only thing keeping me from going to school again [03:28] nv1k is a CS minor and AerE major, and I can say he's more of an EE through being a HAM than one of our actual EE's in the lab. [03:29] i want to go back to school because my job right now is too boring, it's too mudane [03:31] what do you do? [03:31] Btw, with a masters that may get worse. [03:31] i currently do corporate programming, making an online banking system [03:32] that just sucks [03:32] Action: nv1k is using my HF radio to listen to bears football game lol [03:32] i worked for a gps company last couple of years for a startup company [03:32] it sucks but it's a stable job [03:32] and it pays well [03:32] and it's not stressful [03:33] nv1k; nice [03:33] little bit of overkill [03:33] nv1k: Really? Just a little? [03:44] Zuph (~Zuph@2001:470:8:626:222:43ff:fe71:9992) joined #highaltitude. [04:01] kd0fxp (~Christoph@ics174-52.icsincorporated.com) left irc: Quit: Leaving [04:05] Zuph (~Zuph@2001:470:8:626:222:43ff:fe71:9992) left irc: Ping timeout: 276 seconds [05:01] darknesslord_ (~darknessl@189.164.11.125) joined #highaltitude. [05:02] Nick change: darknesslord_ -> israelzuniga [05:15] israelzuniga (~darknessl@189.164.11.125) left irc: Ping timeout: 245 seconds [05:26] Upu (~Upu@ubn.upuaut.net) joined #highaltitude. [05:38] MoALTz (~no@92.18.28.97) left irc: Ping timeout: 252 seconds [05:47] DagoRed (~dago@2610:130:102:1200:21c:b3ff:feb8:da45) left irc: Quit: sleepy time [05:48] nv1k (~madEngine@173-26-204-56.client.mchsi.com) left irc: Quit: Leaving [06:02] jcoxon (~jcoxon@cpc1-lanc4-0-0-cust720.3-3.cable.virginmedia.com) joined #highaltitude. [06:02] morning [06:11] hi [06:19] hey Darkside just popping in [06:19] seems like your hf radio is going well [06:19] heh [06:19] look forward to people decoding by HF :-p [06:19] its working [06:19] hehe [06:20] well when i finish up a proper PCB it will all be released under creative commons [06:20] great [06:20] currently i'm having fun getting the onewire libraries from arduino ported to the xmega [06:21] even more fun when i don't really know C++ all that well [06:21] haha [06:21] right i have to dash [06:21] will chat later [06:21] cya [06:21] jcoxon (~jcoxon@cpc1-lanc4-0-0-cust720.3-3.cable.virginmedia.com) left irc: Remote host closed the connection [06:21] ../UART_Test.c:65: error: no matching function for call to 'DallasTemperature::DallasTemperature(OneWire (*)())' [06:42] Simon-MPFH (~simon@81.187.157.65) joined #highaltitude. [06:48] jasonb (~jasonb@adsl-66-124-73-250.dsl.sntc01.pacbell.net) left irc: Ping timeout: 255 seconds [06:56] juxta_ (juxta@ppp203-122-193-94.static.internode.on.net) joined #highaltitude. [06:58] juxta (Bogaurd@ppp203-122-193-94.static.internode.on.net) left irc: Ping timeout: 245 seconds [07:13] hehe [07:13] juxta was here a few minutes ago [07:16] slothearn (~Christine@pool-98-111-116-30.hrbgpa.fios.verizon.net) joined #highaltitude. [07:27] Nick change: russss_ -> russss [07:38] slothearn (~Christine@pool-98-111-116-30.hrbgpa.fios.verizon.net) left irc: Quit: leaving [07:39] slothearn (~Christine@pool-98-111-116-30.hrbgpa.fios.verizon.net) joined #highaltitude. [07:40] slothearn (~Christine@pool-98-111-116-30.hrbgpa.fios.verizon.net) left irc: Client Quit [07:58] slothearn (~Christine@pool-98-111-116-30.hrbgpa.fios.verizon.net) joined #highaltitude. [08:06] m1x10 (m1x10@ppp089210167031.dsl.hol.gr) joined #highaltitude. [08:09] hi [08:15] yo [08:20] futurity (~anonymous@cpc6-cmbg15-2-0-cust236.5-4.cable.virginmedia.com) joined #highaltitude. [08:26] nathan7_ (nathan@69.61.15.114) left irc: Changing host [08:26] nathan7_ (nathan@unaffiliated/nathan7) joined #highaltitude. [08:26] Nick change: nathan7_ -> nathan7 [09:04] GW8RAK (~chatzilla@host86-148-242-31.range86-148.btcentralplus.com) joined #highaltitude. [09:06] w00t [09:06] got temp sensors working [09:17] :p [09:18] tis awesome [09:18] now i just need to get my board into a box and it'll be ready [09:18] :D [09:44] Laurenceb (80f3fd75@gateway/web/freenode/ip.128.243.253.117) joined #highaltitude. [10:08] kerblammo (~dom@192.130.194.2) joined #highaltitude. [10:23] slothearn (~Christine@pool-98-111-116-30.hrbgpa.fios.verizon.net) left irc: Quit: Lost terminal [10:28] Hey does anyone know a place to order sounding balloons in the EU? [10:29] yes [10:30] http://ukhas.org.uk/general:suppliers [10:31] Yeah, most of those are in the US, it seems. Import duties are fairly hefty here in Finland. I tried Random but they seem to be very busy right now, and out of stock. [10:32] Do you happen to know if the Totex/Kaymont 1000g is suitable for a 1kg payload? I'm a beginner at this. The neck load seems very low on the Kaymont site. [10:33] neck load is not the point at which it will fail. [10:33] It's the point at which it will meet the altitude spec with that load. [10:34] If you fill it 3 times that much, it will lift 3Kg (ish) but burst quite a bit earlier [10:36] OK, yeah I got it [10:36] thanks [10:37] I used the burst simulator and it seemed fine, but the specs seem so different it was good to check [10:37] between the 1200 and the 1000 [10:37] HAHAHA latest XKCD is lol [11:20] defyt (~defy@120.136.2.50) joined #highaltitude. [11:21] defy (~defy@120.136.2.50) left irc: Ping timeout: 264 seconds [11:27] slothearn (~Christine@pool-98-111-116-30.hrbgpa.fios.verizon.net) joined #highaltitude. [11:34] defyt (~defy@120.136.2.50) left irc: Ping timeout: 276 seconds [11:38] MoALTz (~no@92.1.253.43) joined #highaltitude. [12:43] juxta_ (juxta@ppp203-122-193-94.static.internode.on.net) left irc: Ping timeout: 264 seconds [12:47] GW8RAK (~chatzilla@host86-148-242-31.range86-148.btcentralplus.com) left irc: Quit: ChatZilla 0.9.86 [Firefox 3.6.10/20100914125854] [12:56] kerblammo (~dom@192.130.194.2) left irc: Quit: kerblammo [13:36] Problems in metrology of rocket engines. [13:36] http://www.youtube.com/watch?v=upTYrixDbeU&feature=player_embedded [13:36] Zuph (~Zuph@ulsecure-belknap-12086.wireless.louisville.edu) joined #highaltitude. [13:37] jasonb (~jasonb@adsl-66-124-73-250.dsl.sntc01.pacbell.net) joined #highaltitude. [14:29] openpilot looks impressive [14:29] i might nick their code [14:29] as im evil and lazy like that [14:29] wiki.openpilot.org [14:30] :) [14:30] http://svn.openpilot.org/filedetails.php?repname=OpenPilot&path=%2Ftrunk%2Fflight%2FAHRS%2Finsgps.c <-madness [14:30] i cant beleive someone actually went and worked that out by hand [14:30] use a matrix library ffs [14:31] the brute force? [14:31] DagoRed (~dago@2610:130:102:1200:21c:b3ff:feb8:da45) joined #highaltitude. [14:31] Possibly a dodgy code generator [14:32] yeah maybe - very impressive nonthless [14:32] looks like they used EKF with position,velocity,attitude,gyrobias [14:32] 13 component state vector [14:33] 01:00 < Laurenceb> i might nick their code [14:33] spoken like a true engineer [14:33] thats a lot to work out - but they have a dedicated stm32 to do the position [14:34] i dont really see why they need the rtos as theres two processors... guess it helps with the oversampling and interpolating they are doing [14:34] holy crap that code is fucking insane [14:34] oversampling is a nice move as well [14:34] yes, but in a good way [14:34] i'm not entirely sure whats going on there [14:34] Laurenceb: Doesn't matter, matrix math is something the microcontrollers are not optimized for. I can see why they would need to get creative. [14:34] looks like some kind of weird state space crap? [14:34] i cant believe it actually runs fast enough - shows how much it helps to crunch it all out like that [14:35] Darkside: extended kalman filter [14:35] we covered a bit of state space filtering in one of my control subjects [14:35] jeez [14:35] i was previously planning on something a bit simpler [14:35] position, velocity, quaternion [14:35] theyve stuck gyro bias in as well [14:36] also they have a ublox5 on spi - another nice move [14:37] ooh something interesting i just spotted, they have modified the standard EKF algorythm to use a Runge-Kutta estimator in the propogator [14:37] Where is this code? [14:37] 01:00 < Laurenceb> i might nick their code [14:37] argh [14:37] Heh, nice try. [14:37] // ************* RungeKutta ********************** // Does a 4th order Runge Kutta numerical integration step [14:37] these guys are coding gods [14:38] Action: DagoRed wants a link [14:38] http://svn.openpilot.org/filedetails.php?repname=OpenPilot&path=%2Ftrunk%2Fflight%2FAHRS%2Finsgps.c [14:39] thank you [14:39] http://svn.openpilot.org/filedetails.php?repname=OpenPilot&path=%2Ftrunk%2Fflight%2FAHRS%2Fahrs.c [14:39] downsample_data is a really sweet move [14:40] proper fir filter as well [14:41] oh man [14:41] signal processing! [14:41] :P [14:41] got to do a signal processing subject last semester, but we used matlab for everything :( [14:42] only recently got to do some simple FIR filters in java [14:42] im tempted to try and rewrite this to one stm32 - it already seems to be built around PiOS [14:42] Is there a way to do checkout on this server? [14:42] aha "piOS" seems to be their custom build of FreeRTOS [14:43] DagoRed: should be - im no svn expert tho sorry [14:43] I've tried: svn co http://svn.openpilot.org/trunk/ and got nothing [14:43] this is like someone did 6 months of work for me for free XD [14:44] its pretty much all the features you want in a good state space kalman filtery thing rolled inot one [14:44] with sensible hardware [14:45] http://svn.openpilot.org/listing.php?repname=OpenPilot [14:46] not sure how to check it out from there [14:54] jasonb (~jasonb@adsl-66-124-73-250.dsl.sntc01.pacbell.net) left irc: Ping timeout: 240 seconds [14:54] wow the forum is a goldmine [14:54] http://choosh.csee.ogi.edu/spkf/spkf_files/SPKF-INS-Overview.pdf [14:54] thats a good link they posted [14:55] Hahaha, the helicopter they're using is the one that my friend developed for his research!!! [14:56] http://www.youtube.com/watch?v=cjmTYXBLOI8 and http://www.youtube.com/watch?v=DzVnVLEw2qc&feature=related are the helicopters we built in house and used to sell as turn key research platforms. [14:56] Our next iteration... holy crap. [14:57] crappy, I better head off to my DSP class. [14:57] bbl [14:57] Nick change: DagoRed -> DagoRed|class [15:05] this is the only place ive found where people who actually know what they're talking about are discussing this :D [15:12] "I am cynical university professor in engineering going through a mid life crisis." <-thats the sort of person we need to talk to XD [15:13] "in my opinion you are wasting time considering all these different variants of optimal state estimation (EKF, UKF, square root implementations, etc.). Just do a good job on the straight forward EKF and get it working. Maybe you are falling into the same trap as my graduate students and I do sometimes, where we let the explosion of bad (and some good) info in research articles overwhelm our decisions. You must realize that [15:13] sounds like good advice [15:18] IMO if you're using a kalman filter you're already pushing the boundaries of good sense [15:22] :) [15:22] It'd be really nice if RC servo companies started making servos accept higher frequency PWM signals [15:22] its a pretty awesome beast [15:23] the kalman [15:31] e.g. you take a 3 axis gyro and accel, and have attitude and gyro bias as the state vector [15:32] the kalman will correct the yaw rate bias based on the imu behaviour when tilting [15:32] despite the fact theres no heading reference sourc [15:35] It's just hideously expensive [15:38] expensive huh? [15:38] They're running an entire 72MHz processor for that [15:38] actually no - they overkilled [15:39] and the other processor isnt doing much [15:39] looks like they are using mediatec 10hz chipsets [15:40] How much are they using on the IMU? [15:40] with custom firmware - i dont trust it [15:40] i dont know, prob <50% [15:40] That's still an entire processor that I'd consider using though [15:41] as they are using a slightly fudged EKF with hand tweaked matrix code [15:41] the fir filtering is done with integers so that'll be very fast on a cortex M3 [15:41] - to downconvert the mems data [15:42] Action: Laurenceb wonders if he should try the mediatec + custom firmware option [15:49] http://www.epsontoyocom.co.jp/english/info/2010/0824.html <-yum [15:51] Zuph (~Zuph@ulsecure-belknap-12086.wireless.louisville.edu) left irc: Ping timeout: 276 seconds [15:52] jerry507_mac (~jerry507@173-26-191-251.client.mchsi.com) left irc: Quit: This computer has gone to sleep [15:56] Laurenceb (80f3fd75@gateway/web/freenode/ip.128.243.253.117) left irc: Ping timeout: 265 seconds [16:05] Nick change: DagoRed|class -> DagoRed [16:10] hjhj [16:10] uh, ignore. [16:11] davidjc (davidjc@87-194-188-86.bethere.co.uk) joined #highaltitude. [16:15] jasonb (~jasonb@12.201.129.162) joined #highaltitude. [16:31] LazyLeopard (~irc-clien@chocky.demon.co.uk) joined #highaltitude. [16:31] Max (5eaa7e31@gateway/web/freenode/ip.94.170.126.49) joined #highaltitude. [16:31] Nick change: Max -> Guest40591 [16:38] Hello, is it possible to design a baloon which could stabilize at a lower altitude - without explode - and travel through the wind, sending datas to the ground ? [16:38] powered by solar energy obviously [16:40] smealum (~smealum@85-171-205-215.rev.numericable.fr) joined #highaltitude. [16:47] google superpressure balloon [16:47] Basically, in principle it's possible [16:47] The envelope is more challenging to design. [16:48] ok, thanks for the info [16:51] I'm doing a master degree in interactive design and I would like to make a project of a baloon sending datas on twitter according to his location and what the sensors embeded are recording [16:51] that's why I need a long duration flight [16:51] How long duration? [16:51] If you get involved inthunderstorms, things get very complex. [16:52] Twitter is somewhat of a problem - internet connectivity is hard. [16:52] but it's looks really professional.. not really possible for amateurs [16:52] You're basically looking at sat-phones. [16:53] Especially for long duration. [16:53] I don't know, enough time to allow people to follow the twitter and make sense to create an exhibition after the flight [16:53] jontyw (~jontyw@jonty.co.uk) left irc: Quit: Defenestrated [16:54] I've seen some baloons are loosing the GPS connectivity after 24 km, it it always true ? [16:55] not always true, but for some chipsets it is [16:56] I think we've had the best luck with uBlox based chips [16:57] smealum (~smealum@85-171-205-215.rev.numericable.fr) left irc: [16:57] jontyw (~jontyw@jonty.co.uk) joined #highaltitude. [16:58] have you ever heard about any amateur super pressure baloon lauch ? [16:59] I'm on the website of "spirit of knoxville" [16:59] quite interesting [17:10] Zuph (~Zuph@lutz310-02.loutz.louisville.edu) joined #highaltitude. [17:12] stilldavid (~dave@68-64-214-18.static.forethought.net) left irc: Read error: Connection reset by peer [17:14] Guest40591: Got a link? [17:14] My High altitude balloon flight system: based on ATMega324. Supports GPS,Servo,Jpeg Camera,Internal/External Temp, Pressure, Humidity, microSD, Ham Radio, external FTDI breakout and powered with 4AA. --> http://imagebin.org/116968 [17:16] Jasperw (~jasperw@skeleton2.london.iofc.org) joined #highaltitude. [17:16] iHAB-2 Photos are posted: http://www.w0otm.com/iHAB/iHAB-2/Launch-Photos.html [17:17] DagoRed > http://www.spiritofknoxville.com/index.html [17:18] Action: m1x10 likes iHAB2 pics [17:18] Action: DagoRed likes iHAB as well. [17:19] m1x10: I'm working on a similar system: http://imgur.com/cpKyA.png [17:19] W0OTM: Only criticism of iHAB, build your payloads instead of using foam coolers. [17:20] You guys should see what we have up or sleeves for our baloons. [17:20] *balloons [17:21] Zuph, nice [17:22] m1x10: That image is about 3 revisions behind. That's what we sent to the PCB house, though. A couple minor errors and missing features which will be corrected next run-around. [17:23] jerry507_mac (~jerry507@jsmac.student.iastate.edu) joined #highaltitude. [17:23] :p [17:23] DagoRed: whats wrong with foam coolers? [17:24] W0OTM: Just slightly lacking in the wow factor. [17:24] I guess it's just a personal preforance. [17:24] *preference [17:24] DagoRed: But ranking very, very high on the "Easy and cheap" factor :-P [17:25] Agreed. [17:25] DagoRed: In my assessment, I can't build a vehicle as light as what the foam coolers are [17:25] fsphil (~phil@beastie.sanslogic.co.uk) joined #highaltitude. [17:26] DagoRed: by the time you figure in tape, glue ect [17:26] We've been getting lighter by building our own. [17:27] Plus, I found a method to make very strong and very light payloads using a fiber glass super structure and 2lb marine foam. [17:28] DagoRed: thats the beauty of this hobby, you get the opportunity to test anything :) [17:28] Very tre. [17:28] *true [17:28] btw, payload with that marine foam are being pushed up to the website, give me a minute and I'll have a link shortly [17:31] W0OTM: Click on idiot proof*, report final draft, and if you want final presentation. http://home.engineering.iastate.edu/~static09/Files/ [17:37] natrium42 (~natrium@CPE000625d867e2-CM0014045885be.cpe.net.cable.rogers.com) joined #highaltitude. [17:39] earthshine, got a tomtom -- you're right, it's a bit rubbish [17:45] DagoRed: thats alot of work [17:45] DagoRed: :) [17:46] W0OTM: It actually isn't too bad. There is a picture of us on top of the roof doing a drop test (no parachute) with 12lb of sand. [17:46] Visibibly no damage was done. [17:46] DagoRed: how much did it weigh? [17:46] Almost a pound, and we used WAY to much foam. [17:46] DagoRed: 1 pound empty? [17:47] yup [17:47] DagoRed: thats seems like alot. [17:47] Well... we OVER built it, we can get it down to about just about 1/2lb if we remove some foam. [17:47] DagoRed: im no expert, but I wasn't really pleased my foam box weighed in a 120g [17:48] Well if we used just the foam we would have the same effect, and it's stronger then the styrofoam. [17:48] Plus... I like what we did. And the best part is that with APRS it's the worlds greatest beer cooler for floating down a river. [17:49] DagoRed: I agree, well done! [17:49] Thank you! [17:49] DagoRed: I think there is many ways to achieve it [17:49] DagoRed: there certainly isn't a right/ /wrong way [17:49] True, but we hate using off the shelf parts in the lab. We're elitist on that. [18:02] jerry507_mac (~jerry507@jsmac.student.iastate.edu) left irc: Quit: This computer has gone to sleep [18:03] ping DanielRichman or sbasuita [18:03] hi [18:03] oh that was quick [18:03] http://github.com/danielrichman/ssh_irssi_fnotify [18:03] sweet [18:04] basically, I need a sample image -- mind if I use one of the alien-1 shots? [18:04] go ahead; they're all CC [18:04] do you need a full res one? [18:04] nah, it's for the image tx'ing thing [18:04] glorious 320x240 [18:04] aaah, nice :D [18:08] jasonb (~jasonb@12.201.129.162) left irc: Read error: Connection reset by peer [18:09] fsphil: are you going to put the image on a dataflash or sd card and have the atmega read it? You can't fit that all into PROGMEM, let alone ram, can you? [18:09] jasonb (~jasonb@12.201.129.162) joined #highaltitude. [18:10] the scaled version is only 7k - I think this chip has 32k progmem [18:10] jasonb (~jasonb@12.201.129.162) left irc: Read error: Connection reset by peer [18:11] jasonb (~jasonb@12.201.129.162) joined #highaltitude. [18:13] LazyLeopard (~irc-clien@chocky.demon.co.uk) left irc: Quit: Bye [18:17] ahh, nice [18:17] jasonb (~jasonb@12.201.129.162) left irc: Read error: Connection reset by peer [18:18] jasonb (~jasonb@12.201.129.162) joined #highaltitude. [18:18] jasonb (~jasonb@12.201.129.162) left irc: Read error: Connection reset by peer [18:19] jasonb (~jasonb@12.201.129.162) joined #highaltitude. [18:21] jasonb (~jasonb@12.201.129.162) left irc: Read error: Connection reset by peer [18:21] jasonb (~jasonb@12.201.129.162) joined #highaltitude. [18:23] jasonb (~jasonb@12.201.129.162) left irc: Read error: Connection reset by peer [18:24] jasonb (~jasonb@12.201.129.162) joined #highaltitude. 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[18:58] Zuph (~Zuph@lutz310-02.loutz.louisville.edu) left irc: Ping timeout: 245 seconds [19:01] new ssdv sample now up at: http://www.sanslogic.co.uk/ssdv/capture-20101004.flac [19:01] will need the latest dl-fldigi from my github to decode it [19:01] seems to work! [19:03] fsphil: I won't say I told you so :P [19:03] haha [19:03] it looks nice, and even has a lovely interface [19:04] but it lacks basic features the cheaper models have [19:04] Yeah they do lo0ok good, but functionality is lacking [19:11] fsphil: 300baud 8bit 1stop no parity? [19:11] yea [19:11] 350 shift [19:11] it's working (!) [19:11] haha [19:11] this is awesome [19:11] now try to untune it, then move it back -- see if it recovers ok [19:12] and I skipped the first 5th of the transmission and it started just fine [19:12] recovered from nowhere [19:12] yup it recovers [19:12] very cool [19:12] fantastic [19:12] I'd like to have a high resolution video recorded, does anyone thought of using a GoPro HD camera ? [19:13] also when the sample loops around, it should fill in the gaps (because the image ID hasn't changed) [19:13] should be resistant to everything in addition [19:13] thought about it, yes [19:13] fsphil: are you going to have it transmit the same picture a few times? [19:13] stilldavid launched a gopro camera didn't he? [19:14] DanielRichman, don't have enough memory to keep the entire image [19:14] fsphil: I was thinking of making a TODO list for a2 today. I don't know yet but I think we'll fly a camera and an uplink so it might be a possibility [19:14] the idea is that with multiple listeners all uploading to a server, most packets should be received [19:14]