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[07:22] <fsphil> mornings
[07:24] <UpuWork> moring
[07:25] <UpuWork> +n
[07:26] <number10> morning
[07:27] <number10> another week of bad weather ahead :(
[07:28] <fsphil> looks like
[07:33] <fsphil> good weather for programming :)
[07:43] <number10> how is swift comming along?
[07:49] <fsphil> pretty much ready to test in the air. just waiting on DM and conditions to align
[07:50] <fsphil> so winter 2013 probably :)
[07:52] <number10> lol
[07:56] <eroomde> so this week's weather looks awesome
[07:56] <eroomde> purest solidest rain
[07:56] <eroomde> oh i see litterally evrone else has already said this
[07:56] <eroomde> 1. make coffee
[07:56] <eroomde> 2. sit at ipad
[07:56] <eroomde> 3. check bbc weather
[07:57] <eroomde> 4. tell ha
[07:58] <number10> sort of thing most people do on these islands
[08:00] <fsphil> indeed
[08:01] <fsphil> it was nice here yesterday evening
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[08:09] <fsphil> guess I picked the wrong moment to take up gardening
[08:11] <gonzo_> always a bad time to take up gardening
[08:12] <gonzo_> unless it involves planting lumps of ali, and hoping that a latice tower will sprout
[08:12] <gonzo_> (That's what I tell the neigbours is happening in my garden)
[08:13] <Darkside> omfg
[08:13] <Darkside> we got 10 pages in AR :D
[08:14] <Darkside> our equiv of Radcom
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[08:14] <fsphil> wow
[08:14] <fsphil> result
[08:26] <Darkside> habitat got a mention
[08:26] <Darkside> :P
[08:29] <UpuWork> pah mainstream :)
[08:29] <Darkside> :P
[08:35] <WillDuckworth> any link darkside?
[08:44] <Darkside> its not online
[08:44] <Darkside> i'm going to scan it in tomorrow
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[08:50] <Darkside> http://yfrog.com/odpi4ykj
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[08:52] <fsphil> we should send ofcom a copy
[08:56] <Darkside> lol
[08:56] <Darkside> yes
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[09:03] <Laurenceb_> having a .ac.uk email is brilliant
[09:03] <Laurenceb_> just got about £500 worth of free samples
[09:03] <Darkside> haha
[09:03] <Darkside> wait, what is .ac.uk?
[09:03] <Darkside> uni?
[09:03] <Laurenceb_> yes
[09:03] <Darkside> aha :P
[09:05] <andrew_apex> Laurenceb_: who from/what components :)?
[09:06] <Laurenceb_> Rogers Bisco
[09:06] <Laurenceb_> silicone rubber stuff
[09:06] <andrew_apex> never heard of them
[09:06] <andrew_apex> for HABing or something else?
[09:07] <Laurenceb_> i now have several carpet tubes of silicone sheet and foam
[09:07] <Laurenceb_> no - work stuff
[09:07] <andrew_apex> :)
[09:11] <Laurenceb_> grr wheres the F3 discovery :(
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[09:13] <Laurenceb_> id grab one the moment they shipped it.. but nothing
[09:13] <Laurenceb_> only the f4 discovery
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[10:50] <Laurenceb> http://www.b3tards.com/u/888fd2ceafeed217d657/flying_helicopter_cat_orville_death_star_b3ta_herman.gif
[10:53] <SpeedEvil> :)
[10:53] Action: SpeedEvil wonders what the regulation of a piloted ultralight octocopter in the UK would be.
[10:55] Action: fsphil imagines it would be horrible
[10:56] <SpeedEvil> Indeed.
[10:56] <SpeedEvil> Stick it in with a pile of balloon launches - hopefully they'd just rubberstamp it.
[10:57] <SpeedEvil> 'a 10cm balloon, and a 100kg payload - must be a typo'
[10:58] <Laurenceb> i think a hexacopter would work
[10:58] <Laurenceb> backpack with 3 rotors off each side
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[11:21] <gonzo_> sounds like a beheading machine!
[11:23] <SpeedEvil> My thoughts exactly
[11:24] <SpeedEvil> I would not be happy trying one of thesedevices without either rotor cages tested to contain failed blades, or me being significantly out of the plane of rotation
[11:25] <SpeedEvil> 12" of prop blade going at mach 1 can sting.
[11:26] <Laurenceb> http://www.st.com/internet/analog/product/253884.jsp
[11:28] <SpeedEvil> Wow - an integrated quadcopter in a qfn36!
[11:28] <SpeedEvil> err
[11:28] <SpeedEvil> Isn't that part number a straightforward accel?
[11:28] <SpeedEvil> Or is that LIS303D
[11:28] <SpeedEvil> ah - nvm
[11:30] <SpeedEvil> 150ug/sqrt(Hz) is OK. Is magnetic noise good?
[11:30] <SpeedEvil> I've not really looked at specs in detail
[11:30] <Laurenceb> yes
[11:30] <Laurenceb> the accel temperature drift is annoying
[11:31] <Laurenceb> ST used to be 0.1mg/C
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[11:31] <Laurenceb> freescale is that low now, and 90ug/sqrt(Hz) noise
[11:31] <Laurenceb> its got a 16bit adc which is actually an overkill
[11:32] <Laurenceb> but spi and fifo is nice
[11:33] <SpeedEvil> How long is the fifo?
[11:34] <cuddykid> looks like no launch until mid august for me :( awful weather
[11:35] <SpeedEvil> the 'clicking' interrupt aso looks handy - but probably not for INSythings
[11:37] Action: SpeedEvil fails at reading.
[11:37] <SpeedEvil> I can't see how long the FIFO is.
[11:42] <fsphil> something to do when I'm bored on the ISS: http://www.youtube.com/watch?v=m0Ei6h3LVb0
[11:47] <Laurenceb> FIFO stored data level.
[11:47] <Laurenceb> FSS4-0 bits contain the current number of unread FIFO levels
[11:48] <Laurenceb> so 32 samples
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[11:50] <SpeedEvil> Ah
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[14:48] <nick_> Damn
[14:48] <nick_> I had a question I was going to ask the channel but I forgot.
[14:49] <SpeedEvil> Was it about puppies?
[14:49] <nick_> I'd remember if it was about puppies.
[14:49] <nick_> I think it was about electronics.
[14:54] <BrainDamage> was it about electronic puppies?
[14:54] <nick_> Is there a simple way to phase lock a couple of 555 astables?
[14:55] <nick_> (or perhaps an astable with a monostable)
[14:56] <gonzo_> what's the application?
[14:56] <BrainDamage> you could sync the discharge signal on the transition, but rc-based are lousy oscillators in the first place
[14:56] <SpeedEvil> nick_: don't decouple them very well.
[14:56] <SpeedEvil> Job done
[14:57] <nick_> Say I want to measure a short voltage pulse a number of times in the pulse.
[14:58] <nick_> So I have a monostable triggered by going over some threshold, and an astable running with a shorter time period so I can trigger an ADC n times during the monostable pulse.
[14:59] <Randomskk> sounds like you'd be better off using a microcontroller, an interrupt and DMA ADC into RAM
[14:59] <SpeedEvil> What do you have hooked to the ADC?
[14:59] <SpeedEvil> On both sides.
[14:59] <SpeedEvil> And that
[14:59] <nick_> But if the pulse is very sharp at the beginning it could be good to have it so the first ADC trigger is at the beginning of the pulse, not the next period after the monostable triggers.
[15:00] <SpeedEvil> It sounds like you're probably doing it wrong.
[15:00] <nick_> DMA is direct memoray access?
[15:00] <SpeedEvil> yes.
[15:00] <Randomskk> okay, so
[15:00] <Randomskk> have a free running ADC
[15:00] <Randomskk> and a bounds interrupt that starts DMA
[15:00] <SpeedEvil> What is the speed of the pulse.
[15:00] <nick_> Whole thing is ~50ns
[15:00] <Randomskk> or just cyclic DMA into RAM and stop after the pulse is over
[15:01] <Randomskk> getting ten samples into that will be interesting
[15:01] <SpeedEvil> nick_: you can't use the 555 at that timescale
[15:01] <nick_> (Which I think means I need a dedicated flash ADC or something rather than using the micrcontroller, that will need some clock cycles to interrupt)
[15:01] <Randomskk> a 555 won't come close to 200MHz
[15:01] <SpeedEvil> In short - this is going to be a problem.
[15:01] <Randomskk> also at this point you have a fairly serious problem
[15:01] <nick_> OK, so not a 555 but some other oscillator.
[15:01] <SpeedEvil> Why are you trying to sample over the pulse?
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[15:02] <SpeedEvil> What are you trying to measure about the pulse that you care about.
[15:02] <SpeedEvil> This is likely to be a problem you're approaching with a hammer, when in fact you need an eggplant.
[15:02] <nick_> Eggs are not plants!
[15:02] <Randomskk> a common misconception
[15:03] <nick_> I guess I just want to measure the amplitude of the pulse. Measuring a few times just helps me know whether I caught the pulse in time.
[15:06] <nick_> Or lets consider another application where it could be 555s and we're not worrying so much about crazy speeds.
[15:06] <Randomskk> well once you get to the point where you could use 555s you should use a microcontroller
[15:06] <nick_> Lets say I want to turn on and off some LEDs in a sequence.
[15:06] <Randomskk> basically
[15:06] <Randomskk> then you probably want a counter
[15:06] <Randomskk> (or a microcontroller)
[15:07] <Randomskk> a 555 clocking a 4017 will sequence one to ten LEDs for you
[15:07] <nick_> for example: 1) red on, white off 2) red off, white on 3) both off
[15:07] <Randomskk> but so will an ATtiny2313 for lower cost, less board space, fewer components, software-adjustable timing, etc
[15:07] <Randomskk> yea, so you'd hook red and white to a microcontroller and call it a day
[15:08] <Randomskk> you could do it with a 555 clocking a 4017 and then red to the 1 output, white to the 2 output, reset to the 4 output
[15:08] <Randomskk> and that'l obtain your sequence
[15:08] <daveake> If the pulse is very short, can you stretch it using a diode and cap? i.e. Store the peak then catch up after?
[15:08] <Randomskk> but now you need a new PCB to change it or new parts to change the period, vs using a microcontroller
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[15:09] <nick_> YEah, but the application I was thinking of (a warning light sequence) I think the timing would be pretty fixed.
[15:09] <Randomskk> you still may as well use a microcontroller
[15:09] <Randomskk> especially as it's probably already in the project and you only require two outputs
[15:09] <nick_> So why use the brain power of a uC that could be focussed on the problem of when to turn on/off the warning lights?
[15:10] <Randomskk> cheaper, easier, less board space, can be changed when the situation unexpectedly changes, fewer passives, fixed timing, won't drift anything like as much with temperature or age...
[15:10] <nick_> Although I guess if it's just some timed interrupts firing a few times per second it really is using almost no brain powers.
[15:10] <Randomskk> yea
[15:11] <nick_> Just a bit more wiring if the warning lights are separate from the uC.
[15:11] <nick_> A wire for each LED colour rather than a single on/off wire.
[15:12] <Randomskk> rarely a massive issue
[15:12] <Randomskk> you could even be clever
[15:12] <Randomskk> connect the two LEDs in reverse polarity
[15:12] <Randomskk> and together
[15:12] <Randomskk> and hook both ends to a GPIO
[15:12] <Randomskk> now you have two wires, the same two you'd have before to carry on/off and ground
[15:12] <Randomskk> if you set both wires to ground, nothing lights, set one high and one low to get one LED, set the other high and the first low to get the other LED
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[15:35] <kokey> I think I should get a small cheapo arduino clone
[15:41] <Laurenceb> http://www.bbc.co.uk/news/magazine-18644343
[15:41] <Laurenceb> stereotypical nerd is stereotypical
[15:42] <Laurenceb> also
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[15:44] <Laurenceb> http://www.youtube.com/watch?feature=player_detailpage&v=zYWUKFWo1BU#t=10s
[15:44] <Laurenceb> someones been buying Hammond enclosures
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[15:56] <tomm_> hi!
[15:56] <griffonbot> Received email: Adam Greig "[UKHAS] EMF Camp"
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[16:01] <tomm_> i was just having a look at this http://www.mr-lee-catcam.de/pe_cc_o2_en.htm and i've heard its been used as a primary tab tracker, how viable would this be? i'm considering it as a first-time balloon project, as there seems to be less that can go wrong as opposed to a traditional setup?
[16:01] <SpeedEvil> Well - yes.
[16:02] <SpeedEvil> Several issues.
[16:02] <SpeedEvil> Firstly - Is the GPS in it good to 40000m or so.
[16:02] <SpeedEvil> Some GPSs lock up, and require a power cycle once they go over 60000ft
[16:02] <Randomskk> also cats really hate that
[16:03] <tomm_> http://nsballoonproject.wordpress.com/missions/mission-1/
[16:03] <r2x0t> if it lands near cat, it will probably be destroyed
[16:03] <SpeedEvil> Secondly - will it gain lock to phone, and signal back in the ~10-30s or so it may have in signal before it hits the ground.
[16:03] <tomm_> it works according to this
[16:03] <tomm_> http://nsballoonproject.wordpress.com/missions/mission-1/
[16:03] <tomm_> oops double link\
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[16:04] <SpeedEvil> Thirdly - if it hits the ground without signalling, will it actually have a signal on the ground at all
[16:04] <SpeedEvil> - phone coverage at ~10cm, compared to ~1.5m is _MUCH_ worse - even in 'good' areas.
[16:05] <tomm_> it should have good ground signal, as its for use on cats?
[16:05] <SpeedEvil> Fourthly - you have no tracking through most of the flight, so you can't get a rough idea where it's landed if you don't get a signal close to the ground.
[16:05] <tomm_> true
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[16:07] <SpeedEvil> But balloons tend to land in less populated areas.
[16:07] <SpeedEvil> Also - cats tend to come back on their own.
[16:09] <kokey> I got my hands on two broken iphone 4 phones this weekend
[16:09] <kokey> the one has a smashed screen, the other is said to have water damage
[16:09] <griffonbot> Received email: Russ Garrett "Re: [UKHAS] EMF Camp"
[16:11] <daveake> [17:07] <SpeedEvil> Also - cats tend to come back on their own.
[16:11] <daveake> I have a plan .... :p
[16:11] <Randomskk> hahaha
[16:11] <Randomskk> they also land on their feet and have a non-terminal terminal velocity, right?
[16:11] <daveake> exactly
[16:12] <daveake> A homing pigeon would be lighter
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[16:21] <tomm_> so are there any all in one trackers which would overcome those problems, or is the cat tracker idea too much of a gamble?
[16:22] <SpeedEvil> It will probably work - most of the time.
[16:22] <SpeedEvil> But there is a reason why we do the radio thing.
[16:23] <tomm_> for sure
[16:24] <tomm_> i'm just thinking as a 16 year old with limited resources, I feel hiring the tracker would allow me a better chance of making a balloon, as I feel I'd have more chance of expensively messing up my arduino uno than the tracker would have of messing up by losing contact or resetting due to altitude
[16:25] <SpeedEvil> Umm - hiring?
[16:25] <Laurenceb> lol
[16:25] <SpeedEvil> You're not by any means guaranteed to get it back
[16:25] <Randomskk> learn more making the tracker
[16:25] <Randomskk> really it's worthwhile doing
[16:25] <SpeedEvil> I'd guesstimate 60% or so for a first flight
[16:25] <SpeedEvil> At best
[16:26] <Randomskk> not knowing where the thing is in flight significantly reduces your liklihood of recovery too
[16:27] <eroomde> very significantly
[16:27] <eroomde> also tomm_ keep faith, there have been plenty of 16 year olds who have successfully built trackers before
[16:28] <danielsaul> tomm_: In Apex (www.apexhab.org), we're all 16 and 17 year olds and make our own trackers :)
[16:31] <tomm_> haha on hiring i was reading a blog which mentioned being able to hire tracking equipment, obviously i could buy it instead :) i'm seriously impressed, i'm meaning more that even though we're both 16, your levels of knowledge far exceed mine when it comes to trackers
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[16:33] <SpeedEvil> Reading stuff helps.
[16:33] <eroomde> they had to learn it
[16:33] <eroomde> you've got a lot of people here who will help
[16:35] <tomm_> yeah, i'm waiting on a delivery of tracker components (resistors and radio receiver) so learning how was the original plan - but its seriously daunting, and its undeniable that an all in one tracker is tempting
[16:35] <SpeedEvil> You can test large fractions of what you're going to do without flying
[16:35] <SpeedEvil> With the aid of small hills, or even teeny tethereed balloons, running it in the freezer/...
[16:36] <eroomde> tomm_: where abouts are you based geographically?
[16:36] <danielsaul> tomm_: Do you have an electronics/DT dept. at your school at all?
[16:36] <danielsaul> Our DT and physics departments are very supportive of Apex
[16:37] <tomm_> schools just finished :/ and yeah there is, all very basic though -- and south west
[16:38] <Randomskk> whereabouts in the south west?
[16:38] <tomm_> bath
[16:40] <eroomde> not sure if anyone of us are in bath explicitly, though certainly in newbury, oxford, southampton etc
[16:40] <cuddykid> tomm_: I started when I was ~16, seemed extremely daunting at first - it's actually not too bad once you get stuck in :)
[16:41] <tomm_> i think the hardest looking bit is to get the arduino to connect to a gps breakout board and transmit the location data with rtty
[16:41] <tomm_> as in coding
[16:41] <nigelvh> As in most of the functionality of the device.
[16:42] <eroomde> that's not the 'hardest looking bit'
[16:42] <eroomde> that's the entire job
[16:42] <cuddykid> tomm_: there is a lot of code floating around which helps a lot :P
[16:42] <eroomde> so if you can do that, then you've done it all
[16:42] <tomm_> i meant the overall balloon
[16:42] <eroomde> ah right
[16:42] <eroomde> yeah the balloon itself is easy
[16:42] <tomm_> as in i'll be ok building the payload container etc
[17:03] <tomm_> https://github.com/jonsowman/ferret/blob/1d1de28f709e45615dc770e6c4ffd2a6c847a99a/ferrettwo/program/program.pde i'm imagining it would look sim iliac to this, except it would be different for a different gps, and maybe have a different baud, as its mentioned here http://ukhas.org.uk/guides:linkingarduinotontx2 that some baud rates don't seem to work
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[17:19] <nick_> OK, ultrasound rangefinder working
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[17:24] <nosebleedkt> yo
[17:24] <nosebleedkt> that's me two weeks before the flight
[17:24] <nosebleedkt> https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-prn1/553722_3456982788126_778080636_n.jpg
[17:24] <nosebleedkt> xaxaxa
[17:25] <fsphil> you're looking a bit ruff
[17:25] <nosebleedkt> hihih
[17:26] <fsphil> all going well?
[17:27] <nosebleedkt> erh
[17:27] <nosebleedkt> if we ignore the fact that the CAA is not responding
[17:27] <nosebleedkt> everything is a go
[17:28] <fsphil> that's normal then
[17:28] <nosebleedkt> well, I am a bit under stress that they don't respond
[17:29] <fsphil> I always get a bit nervous before a launch
[17:30] <nosebleedkt> :)
[17:30] <fsphil> trying to remember if I've remembered everything
[17:30] <nosebleedkt> yeah!!!!!!!!!
[17:30] <nosebleedkt> thats exactly
[17:30] <nosebleedkt> lol
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[19:03] <daveake> SSDV from a Pi :-) http://i.imgur.com/cKEQ4.png
[19:03] <Randomskk> niice :D
[19:05] <daveake> Using fsphil's program to encode the image
[19:05] <daveake> then some simple code to do the transmission
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[19:23] <nosebleedkt> daveake: what is pi?
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[19:26] <nigelvh> delicious
[19:27] <nigelvh> also a number
[19:27] <fsphil> those bits taste great
[19:27] <nigelvh> in all seriousness nosebleedkt it's in reference to this: http://www.raspberrypi.org/
[19:28] <daveake> It's a cheap computer that can run Linux and plugs in to a TV or monitor
[19:28] <daveake> I'm hoping to fly one soon
[19:28] <fsphil> hah, their magazine is called MagPi
[19:29] Action: fsphil is easily amused
[19:29] <nigelvh> Happens to the best of us fsphil
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[19:48] Action: SpeedEvil is full of pizza.
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[19:52] <fsphil> mmmm
[19:52] Action: fsphil is not
[19:53] Action: Randomskk wishes he were, no food :(
[19:54] <SpeedEvil> I just go tthis months shopping in, which included a large stack of reduced pizza.
[19:54] Action: daveake is full of spag bol
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[19:59] <nigelvh> I sure hope "reduced" is one of those odd english uses of words with a meaning for frozen, because otherwise that sounds unpleasant.
[20:00] <daveake> He means cut-price, not dried or cut in half :)
[20:00] <gonzo_> boiled down?
[20:00] <nigelvh> Ah, it is on sale then.
[20:01] <nigelvh> That makes more sense
[20:01] <nigelvh> Though, that's never something you'd hear over here without explicitly stating it was the price that was reduced.
[20:03] <SpeedEvil> Indeed.
[20:03] <SpeedEvil> And you generally have to be careful, because supermarkets here are bastards.
[20:03] <SpeedEvil> And 50% off often means 'we sold it 33% higher in december 2008'
[20:04] <nigelvh> If it's still cheaper than the other options, what difference does it make?
[20:04] <nigelvh> (leaving them being shifty out of it)
[20:05] <SpeedEvil> It's often not.
[20:05] <nigelvh> Then don't buy it.
[20:05] <SpeedEvil> Indeed.
[20:05] <nigelvh> Seems like a pretty simple solution.
[20:05] <daveake> Sometimes "50% off" means "Half the price we sold it for 2 years ago in 10 stores you've never heard of"
[20:05] <SpeedEvil> Before buying stuff on special offer, I specifically check the price history over the last year
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[20:06] <daveake> Or "Same price as 2 weeks ago before we doubled the price for a day"
[20:06] <nigelvh> I just look at the other options next to it.
[20:06] <SpeedEvil> this leads to wierd purchases, like 15kg of sugar.
[20:06] <nigelvh> That's a lot of sugar.
[20:07] <Laurenceb_> lol
[20:07] <SpeedEvil> But I figure that I'm unlikely to stop liking sugar, and it's a fair chance that if it's at a yearly low, it's not going to go much lower in the future.
[20:07] <nigelvh> True
[20:07] <Laurenceb_> if you combine the adcs on the stm32f3, you can get 36Msps
[20:07] <SpeedEvil> heh
[20:07] <SpeedEvil> Laurenceb: that's a leeetle bit insane.
[20:07] <Laurenceb_> actually maybe not
[20:07] <SpeedEvil> Laurenceb: They're not multiplexed?
[20:07] <Laurenceb_> if you used it with dma
[20:07] <Laurenceb_> theres 4 5msps adcs
[20:08] <Laurenceb_> you can overclock them to 9msps
[20:08] <Laurenceb_> with reduced accuracy
[20:08] <Laurenceb_> if you used them with dma you could make a decentish scope
[20:08] <SpeedEvil> Neat.
[20:08] <nigelvh> Or just get a faster external ADC.
[20:09] <Laurenceb_> yeah but it wont come with dma
[20:09] <nigelvh> Yeah.
[20:18] <nick_> How do you use DMA?
[20:19] <Laurenceb_> give it a pointer to an array
[20:20] <nick_> Give what a pointer to an array?
[20:20] <Laurenceb_> the dma controller register
[20:25] <Laurenceb_> the ST periph libs make it easy
[20:30] <nick_> I had a little read.
[20:31] <nick_> I might try to use it for fast AFC
[20:31] <Laurenceb_> i want to try some frequency locking experiments
[20:31] <Laurenceb_> but ive got way way too much stuff on atm
[20:32] <Laurenceb_> i need some minions
[20:34] <Laurenceb_> http://hackaday.com/2012/07/02/hack-a-days-entry-into-the-red-bull-creation-contest/#comments
[20:34] <Laurenceb_> haha genius
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[20:49] <SpeedEvil> Laurenceb: You need to get with them and do a deployed rolago.
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[21:02] <Laurenceb_> with tho?
[21:02] <Laurenceb_> *who
[21:04] <Laurenceb_> oh red bull
[21:04] <Laurenceb_> heh
[21:04] <Laurenceb_> already done
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[21:06] <Laurenceb_> http://video.google.com/videoplay?docid=4858664474879256299
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[21:06] <Lunar_Lander> hello
[21:07] <Lunar_Lander> hi daveake and Upu
[21:07] <Lunar_Lander> I ran the test code from the Arduino & NTX2 tutorial
[21:07] <Lunar_Lander> and then I tried out the 600 baud option which was annotated "unlikely to work"
[21:07] <Lunar_Lander> in my case it worked
[21:08] <Lunar_Lander> but I think it is not practical on a balloon
[21:08] <fsphil> not as the main method of tracking at least
[21:08] <Lunar_Lander> yea
[21:08] <fsphil> maybe as a second channel
[21:08] <Lunar_Lander> yea, that you like switch to 600 like every fifth string or so?
[21:09] <fsphil> nah, two ntx2s
[21:09] <fsphil> I don't like switching baud rates
[21:09] <Lunar_Lander> yeah
[21:09] <Lunar_Lander> IIRC that never worked before, right?
[21:09] <fsphil> it works, just is annoying
[21:09] <Lunar_Lander> ah
[21:09] <Lunar_Lander> wasn't it with Horus or so that the 50 baud lines came through OK but 300 didn't work?=
[21:09] <Lunar_Lander> or Apex Alpha
[21:10] <fsphil> horus always uses 300
[21:10] <Lunar_Lander> ah
[21:10] <Lunar_Lander> then it was Alpha
[21:10] <fsphil> not sure which one switched
[21:10] <Lunar_Lander> I think Apex Alpha had that
[21:10] <fsphil> I use 300 myself and it works, but I lost the signal about 100km away
[21:10] <Lunar_Lander> yeah
[21:10] <fsphil> although upu has gotten quite a bit further with the same antenna setup
[21:11] <Lunar_Lander> yea
[21:15] <Lunar_Lander> in other news I added a green LED to my board
[21:15] <Lunar_Lander> xD
[21:15] <fsphil> yay
[21:15] <Lunar_Lander> xD
[21:15] <fsphil> leds are amazing
[21:16] <Lunar_Lander> yeah
[21:16] <Lunar_Lander> I want to add a yellow and red one too
[21:16] <Lunar_Lander> but tie these to digital pins on the arduino
[21:16] <fsphil> add a red/green dual colour led, and you get yellow for free
[21:16] <Lunar_Lander> and make some criteria to have them light up so we can see a fault on the launch pad
[21:16] <Lunar_Lander> yea
[21:16] <Lunar_Lander> and then comes the best thing
[21:16] <Lunar_Lander> xD
[21:16] <daveake> I did that on Buzz1
[21:17] <Lunar_Lander> I want to invent a way to have the LEDs go out after launch
[21:17] <Lunar_Lander> :)
[21:17] <daveake> Plus got them all to flash in a sequence for the hell of it
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[21:17] <Lunar_Lander> :)
[21:17] <daveake> And yes they switched off during flight
[21:17] <Lunar_Lander> yea
[21:17] <Lunar_Lander> cause nobody can see them
[21:17] <fsphil> or so you think
[21:17] <Lunar_Lander> XD
[21:18] <fsphil> I liked how they did telemetry recording on early rockets, by pointing a camera at some gauges
[21:18] <Lunar_Lander> yeah
[21:19] <Lunar_Lander> do you know of the National Geographic stratosphere project from 1934/35?
[21:19] <fsphil> nope
[21:19] <Lunar_Lander> the "Explorer" and the "Explorer II"
[21:19] <Lunar_Lander> manned balloons
[21:19] <Lunar_Lander> and they also had photographic recording
[21:19] <Lunar_Lander> like the gauges were in a cabinet with an automatic camera
[21:20] <fsphil> fun times
[21:20] <Lunar_Lander> they had a aneroid barometer and alongside a small mercury barometer which only went along below 150 mmHg
[21:21] <Lunar_Lander> to get the highest altitudes
[21:21] <Lunar_Lander> in the first Explorer they had a full lenghth mercury barometer with a camera that could be moves
[21:21] <Lunar_Lander> *moved
[21:21] <Lunar_Lander> probably impractical
[21:22] <fsphil> this is the sort of tech that got to the moon :)
[21:22] <Lunar_Lander> :)
[21:22] <Lunar_Lander> they had even two barometers
[21:22] <fsphil> and yet we can't with our super fancy computers
[21:22] <Lunar_Lander> the other had another liquid which was about the density of water
[21:22] <Lunar_Lander> but some hydrocarbon
[21:22] <Lunar_Lander> so that it didn't freeze
[21:23] <fsphil> smart
[21:23] <Lunar_Lander> the idea was that the mercury one could be a bit sluggish
[21:23] <eroomde> i just saw prometheus
[21:23] <fsphil> wonder if a block of ice would survive at 30km
[21:23] <eroomde> it's shit
[21:24] <fsphil> it looks great though :)
[21:24] <eroomde> yeah
[21:24] <fsphil> but yea, the writers need to be blown out of the airlock
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[21:24] <Lunar_Lander> xD
[21:24] <fsphil> sorry, god-damn airlock
[21:24] <eroomde> if only the plot and dialogue writers could do something to jusitfy the abilities of the visual people
[21:24] <Lunar_Lander> fsphil, but the thermometers for outside were awesome
[21:24] <eroomde> you might havea film
[21:24] <Lunar_Lander> aspirated wheatstone bridge system
[21:25] <eroomde> ?
[21:25] <eroomde> oh sorry science
[21:25] <fsphil> ScienCE!!
[21:25] <fsphil> talking about really old sensors
[21:25] <Lunar_Lander> :)
[21:25] <fsphil> and how they used to record them with cameras
[21:25] <Lunar_Lander> yeah
[21:26] <Lunar_Lander> if you are interested, your library could have the books
[21:26] <Lunar_Lander> "National Geographic" and "Stratosphere Series"
[21:26] <fsphil> our town library is a bit naff
[21:27] <fsphil> although that was a long time ago
[21:27] <fsphil> I've not been in a while
[21:27] <fsphil> silly internet spoiled me :)
[21:27] <Lunar_Lander> ah
[21:27] <Lunar_Lander> fsphil, https://www.abebooks.co.uk/servlet/SearchResults?bt.x=34&bt.y=6&sts=t&tn=The+National+Geographic+Society+-+U.S.+Army+Air+Corps+Stratosphere+Flight+of+1935+in+the+Balloon+%27Explorer+II%27
[21:28] <Lunar_Lander> Volume I https://www.abebooks.co.uk/servlet/SearchResults?bt.x=34&bt.y=6&sts=t&tn=The+National+Geographic+Society+-+U.S.+Army+Air+Corps+Stratosphere+Flight+of+1934
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[21:40] <Lunar_Lander> fsphil, do the links work?
[21:41] <fsphil> not checked
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[21:44] <Lunar_Lander> ah
[21:45] <fsphil> too late at night, my brain no works
[21:51] <Lunar_Lander> ah ok
[21:54] <daveake> I live in hope that my brain will reset back to normal by the morning
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[21:56] <Lunar_Lander> xD
[21:58] <fsphil> it's not worked for me yet
[21:58] <fsphil> my brain normally starts working at about lunch time, then stops immedialy after
[21:58] <fsphil> +some missing letters
[21:59] <Lunar_Lander> xD
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[22:58] <Lunar_Lander> hello Dan-K2VOL
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[23:13] <Dan-K2VOL> hey kevin
[23:13] <Lunar_Lander> how are you?
[23:13] <Laurenceb_> http://spadworld.net/forum/
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[00:00] --- Tue Jul 3 2012