highaltitude.log.20100909

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[08:07] <m1x10> hi all
[08:07] <m1x10> im thinking of removing the pressure sensor from flight system
[08:08] <m1x10> seems that pressure is certain at certain altitudes and its well known
[08:08] <johnnyfive_> the barometer?
[08:09] <m1x10> y
[08:09] <johnnyfive_> well most of it is well known, isn't it? temperature? etc?
[08:09] <m1x10> yeah but internal temperature varies from payload to payload due to different designs
[08:10] <johnnyfive_> True, probably the only one besides visuals that is really important. Although i've thought about a geiger counter, or something to count radiation. That would be interesting.
[08:10] <johnnyfive_> I can't imagine humidity being all that important either.
[08:10] <m1x10> instead of pressure sensor Im thinking of adding an external thermometer
[08:11] <m1x10> johnnyfive_ this geiger stuff are expensive
[08:11] <johnnyfive_> You can get a kit for like $100
[08:11] <m1x10> any link?
[08:12] <johnnyfive_> This one is $150 http://www.sparkfun.com/commerce/product_info.php?products_id=9298
[08:12] <johnnyfive_> Hold up I know another one
[08:12] <m1x10> 100 to 150 is a big change !
[08:12] <johnnyfive_> sec
[08:12] <johnnyfive_> Here's one for $90 http://www.goldmine-elec-products.com/prodinfo.asp?number=C6979
[08:12] <johnnyfive_> There's one on sale for %105 too, w/ digital display
[08:13] <johnnyfive_> you're in greece though? not sure of any european companies
[08:13] <m1x10> y gr. I can order from US.
[08:14] <johnnyfive_> Could edit this one and take the LED off and read the values instead: http://www.goldmine-elec-products.com/prodinfo.asp?number=C6981
[08:15] <johnnyfive_> Oh I guess no values, just more audible noises/flashing
[08:15] <johnnyfive_> but either way
[08:16] <m1x10> yeah seems it works just with visual/acoustic outputs
[08:16] <johnnyfive_> would be better to have a value reading, but even this is interesting
[08:16] <m1x10> only sparkfun's outputs TTL
[08:27] LeeW (8a20b0fe@gateway/web/freenode/ip.138.32.176.254) joined #highaltitude.
[08:28] <LeeW> Good morning all, Got a question about 'ferret' connections to the radio
[08:29] <LeeW> 'ferret' gives the radio tx signal out of pin6, does that go diect into the radio or is there an intigrator on the end to 'create' the voltages, if so, what?
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[09:33] <m1x10> Today: one more addition to fsa03 and one serious code fix. http://ukhas.org.uk/guides:falcom_fsa03?do=revisions
[09:33] <m1x10> L)
[09:33] <m1x10> :)
[09:56] <LeeW> may I ask a question about the fsa03 code (being a newbie and having only owned the ardunio for 12hrs now)
[09:57] <m1x10> yeah LeeW
[09:58] <LeeW> how do you tell the board what to use as a serial port. I want to 'graft' this code onto the beginning of the 'ferret' code and use the same pins to talk to the gps
[09:58] <LeeW> I have combined the two codes but the 'initialise' doesnt go anywhere
[09:58] <m1x10> arduino has one uart called uart0
[09:59] <m1x10> sometimes ppl for some reasons dont want to use this hardware uart0 from atmega
[09:59] <m1x10> so they use a library code which emulates a uart0
[10:00] <m1x10> this lib is called NewSoftSerial
[10:00] <LeeW> ah, so thats what that is for..
[10:00] <m1x10> i dont know that ferret cod
[10:01] <m1x10> decide what u want ( hardware uart0 or software emulate )
[10:01] <m1x10> and then wire the pins
[10:01] <m1x10> NewSoftSerial(rx, tx)
[10:02] <LeeW> ferret seems to use sw emulate
[10:02] <m1x10> NSS rx go to gps tx and NSS tx go to gps rx
[10:02] <m1x10> yes most of us use the emulator
[10:02] <m1x10> but some guys here dont
[10:02] <m1x10> like SpeedEvil. he seems to hate the emulator :)
[10:04] <LeeW> ok, will give that a try now I know what the nss(3, 2) means
[10:05] <m1x10> wire arduino pin 3 to FSA TX and pin 2 to FSA RX
[10:11] <LeeW> initialise works now
[10:12] <LeeW> very steep learning curve this is !!!
[10:16] <LeeW> would the use of newsoftserial stop the pin being used by something else further down that sets it as an input or output?
[10:18] <m1x10> nss lib for sure sets the pin to output mode. This mode makes the pin understand only 0 or 5v logic 0/1.
[10:19] <m1x10> input mode makes the pin to have an undefined mode/high impendance/floating
[10:20] <m1x10> you cant use the same pin for 2 things
[10:21] <LeeW> ok, so i could use newsoftserial to initialise and the change the pins it uses so the second part of the script (gps to rtty) then could access the pins to get the data
[10:22] <m1x10> to be more specific, if pin 3 is used by nss then OC2B aka timer2 is also used by nss.
[10:22] <LeeW> I am using published scripts as the ballon goes up this weekend and I dont have a year to learn 'scripting'
[10:22] <LeeW> will experiment, cheers
[10:22] <m1x10> usually balloons in a harry fail :)
[10:23] <m1x10> why dont u use other pins than 3 and 2?
[10:23] <m1x10> arduino got many !
[10:23] <m1x10> use 7/8
[10:24] <m1x10> and keep your 3 for that other thing
[10:24] <LeeW> baloon is ok and has a load of cameras so will still fly with a gsm/gps module for recovery, only last minute live gps was though of (we didnt know you guys were here)
[10:25] <m1x10> pin 3 can do pwm so its wise not to use it just for a gps.
[10:25] <m1x10> use other simple digital pins
[10:25] <m1x10> for i/o to gps
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[10:25] <LeeW> have changed it to 2 and 4 as used by the rtty part of the script
[10:26] <m1x10> yeah thats better
[10:26] <LeeW> will play, thanks for the pointes, wont be long before I am back with another batch of questions
[10:26] <m1x10> :p
[10:26] <m1x10> where r u from ?
[10:27] <LeeW> Grimsby, North Lincs
[10:27] <m1x10> wheres that?
[10:27] <LeeW> East coast, uk
[10:27] <m1x10> this channel is world wide visited :)
[10:28] <m1x10> you might got confused by ukhas
[10:28] <LeeW> confusion comes easily at the moment...
[10:28] <m1x10> :P
[10:29] <m1x10> you should stay in the channel so to talk later with ppl who are at work right now. They can help you much more.
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[10:35] <fsphil> hmpf .. I knew my isp would turn bad when talk talk bought them out
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[10:59] <SpeedEvil> m1x10: hate is a strong word. Emulated serial or any other emulated or software implemntation of hardware can be great. It enables you to do stuff cheaper. What I'm complaining about is arduino trying to make it easy. It's like teacching 5-year-olds to drive. yes, it may work for a bit, but it has problems when they try to do something that is beyond the limits of their knowledge.
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[11:08] <timbobel> HoHoHo II: offshore edition announced
[11:08] <timbobel> http://hollandshoogte.wordpress.com/news/
[11:11] <fsphil> very cool
[11:11] <timbobel> unless it splashes down, then i will be crying.
[11:12] <timbobel> i really like the lassen iq
[11:12] <timbobel> it actually has flash memory
[11:12] <timbobel> and the battery is great
[11:13] <timbobel> i let it get lock: then i cut the power.. wait an hour, power on again: immediate lock! (battery installed).
[11:13] <fsphil> what will they be using sstv for?
[11:13] <timbobel> ehm
[11:13] <timbobel> they wanted to point the camera
[11:13] <timbobel> ...
[11:14] <fsphil> a bit slow
[11:14] <timbobel> so they will make a three degrees of freedom servo system with my cams and sstv thingy on it
[11:14] <timbobel> maybe sstv is not the word
[11:14] <timbobel> it'll be something like a guard camera system
[11:14] <fsphil> ah, cctv
[11:15] <m1x10> SpeedEvil: sure, I was just kidding, hihi
[11:16] <timbobel> by the way, my radiometrix module with selectable 5v or 3v3 works great
[11:16] <timbobel> and the mini lassen iq breakout works great too
[11:17] <timbobel> but i made a huge mistake in the motherboard, haha, i mirrored a connection the wrong way
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[11:18] <m1x10> hey timbobel
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[11:18] <m1x10> nice blog u made there
[11:19] <juxta_> hey fsphil
[11:19] <fsphil> hehe m1x10, in my head, that was followed by "... shame if something where to happen to it"
[11:19] <fsphil> hi hi juxta_
[11:19] <timbobel> m1x10: but you saw that already right?
[11:20] <timbobel> juxta: great writeups, i enjoyed it.
[11:20] <juxta_> cheers timbobel
[11:20] <timbobel> so what's next?
[11:20] <juxta_> some news re airborne repeaters - we liked the simplex repeater so much we're going to fly it as a regular component on future payloads
[11:20] <timbobel> very nice.
[11:20] <juxta_> plus we'll be adding a DTMF decoder for uplink
[11:21] <timbobel> but have you thought about yeah
[11:21] <Randomskk> juxta_: it seems like a really, really neat idea
[11:21] <timbobel> i wanted to say
[11:21] <timbobel> uplinking stuff
[11:21] <Randomskk> I'm now playing with concepts for doing something similar on the radios we can use
[11:21] <juxta_> we're also working on a cross band talk throgh repeater
[11:21] <timbobel> i am thinking of buying the NIM2
[11:21] <Darkside> juxta_: its easy to make a dodgy as hell UHF repeater
[11:21] <juxta_> yeah
[11:21] <Darkside> i made one with two half watt handhelds :P
[11:21] <juxta_> but we don't want intermod, and we don't want too dodgy :P
[11:22] <Darkside> yeah, but i wasnt getting intermode with this repeater
[11:22] <Darkside> as they were only half watt
[11:22] <Laurenceb> have you looked at stuff like the silabs and chipcon ics ?
[11:22] <juxta_> getting appropriate filters to keep repeater TX out of repeater RX will be too tricky, esp on 2m as separation is only 600khz
[11:22] <juxta_> Laurenceb, no I haven't - what are they?
[11:23] <Laurenceb> ism band transceiver ics
[11:23] <Darkside> juxta_: this was UHF :)
[11:23] <Darkside> UHF CB band actually
[11:23] <Laurenceb> CUSF use chipcon on badger
[11:23] <juxta_> oh right, I'll check them out
[11:24] <juxta_> 434mhz Laurenceb?
[11:24] <Laurenceb> http://i.imgur.com/0h3aC.png <- right nicer ground flood and i really cant be bothered with doing anything else to this :P
[11:24] <Laurenceb> yes - look at CC1020 for example
[11:24] <Laurenceb> or si4432
[11:24] <juxta_> cheers, will check them out
[11:24] <juxta_> nice board by the way
[11:25] <Laurenceb> not nice to design - ive lost the will to live
[11:25] <Laurenceb> just redid the ground planes quite a bit - but they are a lot nicer now around the servos
[11:25] <juxta_> we're able to use ham gear here which is nice
[11:25] <Laurenceb> yeah that helps
[11:26] <juxta_> yeah, it looks pretty busy, congrats :)
[11:26] <juxta_> the plan is to get the repeater + telemetry payload down to say 200g all told, then it can be used on future launches for C&C
[11:26] <juxta_> as comms between our cars out in the boondocks is tricky
[11:27] <juxta_> Darkside, the other advantage to making the repeater for public use crossband is that only hams who have half a clue will be able to use it then
[11:28] <Darkside> yes
[11:28] <Darkside> for the UHF repeater it wouldn't have been a standard repeater
[11:28] <fsphil> lol
[11:28] <Darkside> i.e. 31 input, 1 output
[11:28] <juxta_> hehe
[11:28] <Darkside> when i did it I had channel 9 input and channel 39 output
[11:28] <fsphil> did you get anyone messing about with the last repeater?
[11:29] <juxta_> fsphil, yeah a few hams came on
[11:29] <Darkside> ill need to let my dad know next time it happens
[11:29] <juxta_> http://projecthorus.org/horus6.html
[11:29] <fsphil> by messing around, I mean doing bad things
[11:29] <juxta_> Darkside, I think I put him on the mailing list
[11:29] <timbobel> i luuuuv desoldering braid
[11:29] <Darkside> juxta_: heh xool
[11:29] <Darkside> cool
[11:29] <juxta_> oh, not anything malicious
[11:29] <Darkside> i think he emailed in somewhere
[11:29] <Darkside> or talked to someone somewhere
[11:29] <juxta_> but it was a parrot repeater so it was very hard for people not to come in on top of one another
[11:30] <juxta_> until we got control established with a control station
[11:30] <juxta_> range was great - some contacts over 700km
[11:31] <fsphil> I was pondering using the ntx2 for voice, but the power just isn't enough
[11:31] <juxta_> yeah besides that you would be able to do it I guess
[11:31] <juxta_> Randomskk, what are you experimenting with?
[11:31] <fsphil> rtty repeater, definitely
[11:32] <juxta_> i'll make sure we get a recording of the repeater next time :)
[11:32] <Randomskk> juxta_: a few thoughts, but nothing in hardware yet. full duplex rtty repeating is one of the things I'm considering
[11:32] <Darkside> im wondering if it will be safe to run a HF payload in teh same box as the UHF one
[11:32] <Darkside> at 50mW, idont think it would be a problem
[11:32] <Darkside> and its TX only, no RX
[11:32] <juxta_> have a few promising launches coming up too: one flying a Canon G9 + 3 HD 1080p video cameras
[11:33] <Randomskk> ooh, that should be fun
[11:33] <juxta_> that should be fine I imagine Darkside
[11:33] <Darkside> oooooh juxta_
[11:33] <Darkside> that sounds cool :)
[11:33] <Darkside> yeah im gonna need to start on a motherboard for all my stuff
[11:33] <juxta_> yeah, I'm looking forward to it, hehe
[11:34] <Darkside> thats going to be the 10-10-10 one?
[11:34] <juxta_> nah
[11:34] <juxta_> that one will have 1 HD video camera on it I think
[11:35] <Darkside> heh
[11:35] <Darkside> hopefully i'll have a R10 or some other better receiver by then
[11:35] <juxta_> we also have organised for Jane Reily to come along to a launch by the looks of things
[11:35] <Darkside> who?
[11:35] <juxta_> for a little TV segment
[11:35] <Darkside> oh lol
[11:35] <juxta_> you know, the weather lady :P
[11:35] <Darkside> hahaha awesome
[11:36] <Darkside> thats really cool :)
[11:43] <m1x10> Ok I got some zoomed pics to fsa antenna, so ppl dont get scared !
[11:43] <m1x10> http://imagebin.org/113356 <-- broken grounds
[11:43] <m1x10> http://imagebin.org/113357 <-- broken grounds2
[11:43] <m1x10> http://imagebin.org/113358 <-- fixed
[11:45] <timbobel> looks aweful
[11:45] <m1x10> haha
[11:45] <m1x10> yeah
[11:45] <timbobel> did they break off?
[11:45] <m1x10> yeah
[11:46] <timbobel> when
[11:46] <m1x10> that time ago i had the problem...remember..m1x10_syndrom !
[11:46] <m1x10> Right now I just zoomed to see how it looks like
[11:46] <m1x10> and appears that grounds where together with rf out
[11:47] <m1x10> so i just moved the grounds to that side solder tubes
[11:47] <m1x10> away from rf out
[11:47] <m1x10> i have 3d fix inside my home :p
[11:48] <m1x10> i guess if i put some glue everything will never move again
[11:48] <m1x10> though its hard to move it right now
[11:48] <SpeedEvil> well
[11:48] <SpeedEvil> Glue on stuff that should be seperated by air is bad
[11:48] <SpeedEvil> for RF
[11:48] <m1x10> the metal gnd pins hold it firmly there
[11:49] <SpeedEvil> as it changes the dielectric constant
[11:49] <SpeedEvil> and creates an impedence mismatch.
[11:49] <m1x10> SpeedEvil i was going to ask you..
[11:49] <SpeedEvil> I'd avoid gluing it directly if possible.
[11:50] <m1x10> the metal gnd pins at the sides hold the whole antenna very firmly
[11:50] <SpeedEvil> Gluing the coax that's going from the socket, and around the socket is fine though - to remove any potential strain.
[11:50] <SpeedEvil> why did it fail?
[11:50] <m1x10> no i didnt have any problems. I just wanted right now to see how bad it looks like.
[11:51] <juxta_> glue the back of the module, where the notch sits in the PCB
[11:51] <m1x10> and i sew that gnds are on rf out !
[11:51] <juxta_> that way there is no stress on the solder points
[11:51] <m1x10> that was terrible
[11:51] <m1x10> in first pic
[11:51] <m1x10> yeah juxta_
[11:51] <m1x10> im thinking of that
[11:51] <Randomskk> probably more RF in for GPS
[11:51] <juxta_> it's not pictured here, but this is where I glue mine: http://projecthorus.org/wp-content/uploads/2010/06/IMG_3486.jpg
[11:52] <m1x10> yeah at the back
[11:52] <juxta_> i just put a blob of epoxy on the plastic notch there to bond it to the PCB then that supports everything rather than it all coming down to 2 solder points
[11:53] <m1x10> i believe fsa is the god of gps
[11:53] <m1x10> its so cool
[11:53] <m1x10> its easy to get fixed
[11:54] <m1x10> timbobel, my life goal is to persuade you buy a new fsa03 :):) haha
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[12:38] <LeeW> afternoon all, any ferret experts out there?
[12:39] <Randomskk> 'experts', what's up?
[12:41] <LeeW> pwm output from ardino to radio, I guess something othere that a bit of wire is required, integrator to generate voltages?
[12:44] <Randomskk> you'd think that, but no
[12:44] <Randomskk> I don't think we even used a capacitor which is a bit naughty
[12:45] <LeeW> think we are sorted with the code, need to flick a switch to change pins from initialise to run modes as its two bits of code glues together
[12:45] <LeeW> tried a bit of wire and couldnt get anything that 'looked right' on the receiver
[12:46] <LeeW> sounded like rtty but thats where it ended, didnt seem to have the rights shift
[12:46] <Randomskk> I take it your arduino is 5v?
[12:46] <Randomskk> you may want to put a capacitor in as a low pass filter
[12:46] <LeeW> yes
[12:47] <Randomskk> wish we'd made a proper schematic
[12:47] <Randomskk> we were quite rushed at the time though
[12:47] <Randomskk> might still have the notes in my notebook
[12:47] <Randomskk> might not still have my notebook
[12:48] <LeeW> rushed, ah, I can associate with that...
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[12:53] <m1x10> sorry to ask but whats the use of rtty?
[12:55] <Randomskk> in what context? we use it to encode text to some form of radio modulation so we can receive and decode it later
[13:00] <m1x10> hm
[13:00] <Randomskk> there are other methods
[13:01] <Randomskk> dominoex, for instance
[13:01] <Randomskk> but rtty is very very simple and good enough
[13:01] <Darkside> whee
[13:01] <Darkside> gotta get dominoEX working on my system..
[13:01] <Darkside> code is there, just need to get it tuned
[13:03] <timbobel> what is a good way to tune to 50 baud
[13:03] <Darkside> mot much tuning is needed for 50 baud
[13:04] <Darkside> stick a delay in for approximately how long it should be, then see if fldigi decodes it
[13:06] <fsphil> that's what I did last time, worked well
[13:06] <Darkside> mm
[13:06] <Darkside> for dominoEX its a bit harder
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[13:06] <Darkside> i need to tune the timing, and the frequency spacing
[13:07] <fsphil> as long as the timing over a single byte is close enough, fldigi will decode it
[13:07] <Darkside> i think in my case its more the spacing
[13:07] <Darkside> i was using DanielRichman's code, which was designed for the NXTs
[13:07] <Darkside> whereas i'm using an AD9835 signal generator, which i program a carrier frequenxy into
[13:08] <Darkside> so i basically reprogram the AD9835 at the symbol rate
[13:08] <fsphil> are you transmitting directly from the AD9835? IC -> antenna?
[13:08] <Darkside> nah
[13:09] <Darkside> doesnt put out anywhere near enough power
[13:09] <Darkside> it does maybe half a microwatt into 50 ohms
[13:09] <Darkside> i've got an AD8008 op-amp amplifier in front of it, which bumps it up to about 40-50mW into a 50 ohm load
[13:09] <Darkside> i'm workign on a Class E amplifier, which should do up to 5W output
[13:10] <fsphil> that's quite a neat setup
[13:10] <Darkside> when its in deliverable form i'll upload pics :P
[13:10] <Darkside> atm its totally ot :P
[13:10] <Darkside> also i dont know how much the AD9835 will drift with temperature - thats the next test i need to do
[13:11] <fsphil> yea bit iffy with dominoex + frequency drift. fldigi can still decode if the frequency is a bit off, but it doesn't have any kind of afc like it does with rtty
[13:13] <Darkside> ahh
[13:13] <Darkside> that sucks
[13:13] <Darkside> basically im gonna drop the AD9835 board into a box full of dry ice and see what happens
[13:13] <Darkside> (with a bit of insulation)
[13:13] <fsphil> if the drift isn't that bad then it shouldn't be an issue
[13:13] <Darkside> i did it to an XMega - it survived being chilled to -55 degrees, and worked the whole time
[13:14] <fsphil> dry ice is fun
[13:14] <Darkside> hell esy
[13:14] <Darkside> yes
[13:14] <Darkside> the transmitter is actually for a uni final yea rproject
[13:14] <Darkside> but i figure it can be applied very well to a balloon telemetry transmitter
[13:14] <Darkside> and it will make an awesome test
[13:15] <fsphil> just having a quick look at the specs .. 1Hz > 25MHz, sweet
[13:15] <Darkside> i wouldnt use it above 10MHZ without some good filtering
[13:15] <Darkside> even at 7.5MHz theres harmonics
[13:16] <Darkside> you have to remember its a Digital synth, running from a 50MHz oscillator - nyquist's law comes into play
[13:16] <fsphil> true true
[13:16] <Darkside> so thats 10 samples per cycle at 5MHz
[13:16] <Darkside> ideally you tune the antenna, and that filters it out a bit
[13:17] <Darkside> it wont be putting out much power on the harmonics anyway
[13:17] <Darkside> i still need to make a filter for my circuit - its low on my priority list because it works fine without one
[13:17] <Darkside> once i get to the power amplifier stage, then i need to do something
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[13:41] <fsphil> any recommendations for a cheapish audio dac with a serial interface? (SPI or I2C)
[13:42] <Darkside> dunno
[13:42] <Darkside> what for?
[13:42] <fsphil> er, ADC even ...
[13:42] <Darkside> :P
[13:42] <Darkside> dunno really
[13:42] <fsphil> I've got an idea for capturing and transmitting audio
[13:43] <Darkside> the chip i'm using, the XMEGA, has them inbuilt
[13:43] <Darkside> and i can attach up to 16MB of SDRAM to the XMega :)
[13:43] <Darkside> so with the Xplain board, which has 8MB of SDRAM, i could do audio recording out of the box :P
[13:44] <fsphil> haha, I've got a lowly atmega :)
[13:44] <fsphil> 4k baby
[13:44] <Darkside> hehe
[13:44] <Darkside> the xmega has ADCs and DACS
[13:44] <Darkside> go buy an XPlain board :P
[13:45] <grummund> the Xmega ADC is a bitch :P
[13:45] <fsphil> ah but can it do stereo :P
[13:45] <Darkside> fsphil: yeah, kidn of
[13:46] <Darkside> well it has 2 ADCs
[13:46] <Darkside> meant to be 12 bit ADCs too, but they have problems, so its more like 10 bit
[13:46] <Darkside> grummund: yeah, noise.......
[13:46] <Darkside> and the references arent accurate
[13:47] <grummund> noise, and offsets, and advertised modes which don't work ;p
[13:47] <Darkside> heh
[13:47] <Darkside> ive only tested single ended modes
[13:47] <Darkside> and unsigned, since its all i've needed
[13:47] <grummund> differential is better
[13:47] <Darkside> im not measuring any differential sources
[13:47] <Darkside> what have you been using it for?
[13:47] <fsphil> ooh.. live google results, that's weird
[13:48] <grummund> with single-ended input in signed mode you can get accurate 11-bit, but in unsigned the noise is so bad its more like 10 bit as you say
[13:49] <Darkside> mm
[13:49] <Darkside> i was doing pass-through audio
[13:49] <Darkside> just as a test, and yeah, it was noisy
[13:49] <grummund> so you might see an improvement just by changing to signed mode, despite the dynamic range being 0-2047 instead of 0-4095
[13:49] <Darkside> ok
[13:49] <Darkside> any problems with the DACs?
[13:49] <grummund> not touched those yet
[13:49] <Darkside> and have you used the EBI stuff?
[13:50] <grummund> EBI what? ;p
[13:50] <Darkside> i've yet to have a need for the 8MB of SDRAM on the xplain board
[13:50] <Darkside> but its there if i want it
[13:50] <Darkside> EBI is where you attach exernal memory, and it becomes part of the main memory space
[13:51] <grummund> ah, no.. not looked at that yet.
[13:51] <Darkside> so i can set a few registers, and suddenly i have 8MB more RAM
[13:51] <grummund> need to tell gcc about it?
[13:51] <Darkside> not sure how that part of it works..
[13:52] <Darkside> i was just going to use it as a buffer area, so i'd just set a pointer to the start of it, and just write to the area
[13:52] <Darkside> as i said, i haven't had need of it yet - i'll get there eventually
[13:52] <grummund> ok, that would work
[13:54] <Darkside> mm
[13:54] <Darkside> but yeah, i'm using the 32.768KHz crystal on teh xplain board to control the timing of the radio modulation stuff
[13:55] <Darkside> because i know the main chip's RC oscillator drifts by about 1MHz at low temperators
[13:55] <Darkside> low being down around -50
[13:55] <Darkside> i'm hoping the crystal won't be so bad..
[13:56] <Darkside> these are things i need to test
[13:56] <grummund> maybe you could do some smart calibration using the onchip temperature measurement
[13:56] <Darkside> nah its too inaccurate at low temperatures
[13:56] <grummund> ok
[13:56] <Darkside> but i could do it using an external temp sensor
[13:56] <Darkside> one of those ds18B20's or something
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[14:41] <timbobel> so can someone still incorporate the "#" for the checksum instaed of the "*"
[14:42] <timbobel> otherwise my awesome baudot wont wo rk!
[14:42] <timbobel> $$TBL,0,00:00:00,0.0000,0.0000,0#76
[14:42] <timbobel> $$TBL,1,00:00:00,0.0000,0.0000,0#77
[14:42] <timbobel> $$TBL,2,00:00:00,0.0000,0.0000,0#74
[14:42] <timbobel> $$TBL,3,00:00:00,0.0000,0.0000,0#75
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[15:50] Nick change: philihp|work_ -> philihp
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[17:13] <fsphil> I wonder if we could just replace the BEL character with an *
[17:13] <fsphil> although deviating from the standards is never good
[17:14] <timbobel> indeed
[17:14] <timbobel> i would not see a problem with making the # go for the * as well
[17:14] <timbobel> well my new flightcomputer is awesome
[17:15] <timbobel> the lassen is pretty awesome
[17:16] <m1x10> timbobel post me a link with lassen
[17:16] <fsphil> what did you put on the computer?
[17:16] <m1x10> i want to see price and specs
[17:18] <timbobel> oh its just my motherboard, PICTURA I
[17:18] <timbobel> sd card;radiometrix ntx2, led, lassen iq
[17:18] <timbobel> the lassen iq is modular (single PCB)
[17:18] <timbobel> the radiometrix is modular (single PCB)
[17:18] <timbobel> and the motherboard is modular, and has 3 AAA sockets
[17:19] <timbobel> built in temp sensor as well
[17:19] <timbobel> and you have to put in a arduino pro mini as processor, yes modular as well
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[18:32] <timbobel> New flightcomputer; http://hollandshoogte.wordpress.com/2010/09/09/pictura-i-flightcomputer/
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[18:45] <Upu> very nice timbobel
[18:48] <timbobel> works great
[18:48] <timbobel> could be improved though, but you never know until youve had version 1 in your hands
[18:49] <m1x10> I broke the helical antenna !
[18:50] <m1x10> timbobel I wish I had your money !
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[19:12] <timbobel> when did you berak it
[19:12] <timbobel> earning money is quite easy really
[19:12] <timbobel> mirc or habbing doesnt really help with that ;)
[19:16] <jcoxon> nice board timbobel
[19:16] <jcoxon> is the radio module meant to be at an angle ?
[19:18] Action: jcoxon new falcoms have finally arrived
[19:25] <timbobel> jcoxon: no, designflaw. luckily it doesnt short circuit anything when its slanted.
[19:26] <timbobel> next time i will put a support on opposite side.
[19:28] <jcoxon> :-)
[19:29] <jcoxon> looks really good
[19:29] <jcoxon> like how modular it is
[19:35] <fsphil> like the sd card slot
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[19:49] <timbobel> nah the sd card is not modular because of the simpel reason that all sd cards are the same: no need for improvement, ever.
[19:58] <jonsowman> wwwww
[19:58] <jonsowman> oops
[19:58] <jonsowman> ignore
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[20:38] <Upu> quick q what's a normal baloon size ?
[20:38] <Upu> 1000g ?
[20:39] <Upu> to get reasonably high with a 0.5kg payload
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[20:40] <justin> hey guys
[20:40] <Upu> evening
[20:40] <natrium42> sup?
[20:42] <justin> looking to launch a balloon
[20:42] <justin> :)
[20:43] <justin> just started doing my research though and stumbled across your chan, so I thought i Would start idling here :)
[20:43] <Upu> welcome
[20:44] <Upu> UK based ?
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[20:55] <justin> I am in the US
[20:57] <SpeedEvil> Welcome, even so. We won't hold it against you. :)
[20:57] <SpeedEvil> There are maybe 5 people in the US and canada
[20:58] <SpeedEvil> most here are UK and a few in the rest of the EU
[20:58] <SpeedEvil> And some australians.
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[21:03] <natrium42> eh?
[21:03] <Randomskk> he did say canada
[21:04] <natrium42> oh right
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[21:11] <Laurenceb> hi folks
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[21:22] <Laurenceb> eagle freemium wont work :(
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[21:23] <Laurenceb> so much for that
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[21:25] <Dently> what would be a good inxepensive gps for the MicroTrak?
[21:25] <Randomskk> Laurenceb: how come?
[21:26] <Laurenceb> dunno
[21:26] <Laurenceb> actually - im connected with another pc on my router
[21:26] <russss> hm, haven't posted this in hear I don't think
[21:26] <russss> here
[21:26] <russss> http://www.youtube.com/watch?v=CyHiMORy9tU
[21:26] <Laurenceb> if it acesses a cadsoft server that might have caused an issue
[21:26] <Laurenceb> hard to see how
[21:26] <russss> timelapse from the ISS
[21:27] <Laurenceb> will reconfigure my machines
[21:27] <Laurenceb> and have a try
[21:30] <jcoxon> russss, okay - need to photograph the aurora from a balloon...
[21:30] <russss> haha, good luck
[21:30] <russss> I'd be interested to try and stabilise a camera on a balloon
[21:30] <jcoxon> well, the main issue with aurora viewing is the weather...
[21:30] <jcoxon> but yeah long exposues would be a challenge
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[21:35] <laurence_> fixed
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[21:35] <laurence_> that is not right
[21:35] Nick change: laurence_ -> Laurenceb
[21:35] <Laurenceb> element14 screwed up their licensing thing big time
[21:35] <Randomskk> yet another reason to like kicad
[21:37] <SpeedEvil> Laurenceb: was it the lsm303 you were using?
[21:37] <SpeedEvil> Or am I mis-remembering - I thought there was a gyro/mag part - that's mag/accel
[21:38] <Laurenceb> yes
[21:38] <Laurenceb> lsm303dlh
[21:38] <SpeedEvil> Insane price. :)
[21:38] <natrium42> ismoeoedih?
[21:38] <SpeedEvil> http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=497-10474-ND
[21:39] <SpeedEvil> I'm pondering jamming one in my phon
[21:39] <SpeedEvil> e
[21:39] <Laurenceb> its free
[21:39] <SpeedEvil> free?
[21:39] <Laurenceb> if you email and ask for samples :P
[21:39] <SpeedEvil> Oh - I assumed it wasn't showing up on st.com as a sample - ...
[21:40] <Laurenceb> according the diydrones forum they'll send 2 samples of it if you email
[21:40] <Laurenceb> *to
[21:40] <SpeedEvil> I wish it was half the thickness.
[21:40] <SpeedEvil> Meh
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[21:43] <Laurenceb> bbl
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[21:44] <justin> hey stilldavid
[21:45] <stilldavid> hello justin
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[21:51] <SAIDias> howdy
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[22:41] Nick change: SpeedEvil1 -> SpeedEvil
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[23:36] Nick change: SpeedEvil1 -> SpeedEvil
[23:54] Nick change: Cleo_ -> Cleo
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[00:00] --- Fri Sep 10 2010