highaltitude.log.20130411

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[00:09] <arko> anyone here familiar with the HX1?
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[00:11] <codrBlu> Greetings! Any U.S. ballooners on here?
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[00:15] <arko> yep
[00:15] <arko> sup codrBlu
[00:15] <codrBlu> Hii Arko! I was told earlier to reach out to you.
[00:16] <arko> where you from?
[00:16] <codrBlu> Ohio
[00:16] <arko> oh neat
[00:16] <codrBlu> You?
[00:16] <arko> Los Angeles
[00:16] <arko> you got some good land to land on :P
[00:16] <codrBlu> That is very true, and no oceans to worry about. I'm just getting into HAB and I'm trying to learn all I can.
[00:17] <codrBlu> Do you use APRS in your balloons?
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[00:29] <arko> yes i do
[00:29] <arko> 144.390Mhz
[00:29] <arko> it works great
[00:29] <arko> as long as your radio lives
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[00:30] <codrBlu> Cool. I don't have a HAM license, but I am trying to get one quickly. Studying right now actually.
[00:31] <codrBlu> Have you played with any non APRS tracking using your own receiving antennas?
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[00:32] <arko> yeah
[00:32] <arko> RTTY transmitter on 434.075
[00:32] <arko> using dl-fldigi
[00:32] <arko> it's pretty awesome
[00:33] <arko> and i would prefer it.. but sadly, we dont have a great network here
[00:33] <arko> like all the fine folks in the uK
[00:34] <codrBlu> Hmm. I'll have to look into fldigi.
[00:35] <codrBlu> As I understand it, if your balloon transmits APRS, no one needs to do anything special. Existing HAM equipment being used for other things automatically pick up the data and send it on through to aprs.fi
[00:35] <Darkside> it gets picked up by the APRS network, yes
[00:35] <Darkside> which is useful, for sure
[00:36] <Darkside> the UK guys don't do that as they aren't allowed to use amateur radio transmitters airborne
[00:36] <Darkside> so they are limited to the ISM bands
[00:36] <Darkside> in australia we generally use the RTTY system too, as it more reliable with less power than an APRS transmitter
[00:36] <Darkside> but we do fly APRS occasionally
[00:36] <codrBlu> With 434.075, you need people to be actively looking for the signal and sending you the telemetry via what? Over the phone?
[00:36] <Darkside> dl-fldigi uploads it automatically
[00:37] <Darkside> to a backend server system called 'HABitat'
[00:37] <Darkside> from there, it is plotted automatically on spacenear.us/tracker/
[00:37] <Darkside> and on other systems such as habhub.org/mt/
[00:37] <Darkside> it's also logged, and stats generated
[00:37] <codrBlu> So there are systems always running that are looking for RTTY signals on certain frequencies and automatically forward the telemetry to HABitat?
[00:37] <Darkside> yes, it requires people to be actively turning on a radio and receiving data, but we find it adds to the 'spectator involvement'
[00:37] <Darkside> no
[00:38] <Darkside> operators must have a radio going
[00:38] <codrBlu> Ok.
[00:38] <Darkside> but it lets what would normally be spectators participate in teh launch
[00:38] <codrBlu> Cool
[00:38] <Darkside> hold on, i have an excellent example of the system at work
[00:39] <Darkside> http://i.imgur.com/4QMQduK.jpg
[00:41] <codrBlu> That's awesome.
[00:42] <Darkside> so the balloon is showin in the centre of the image (approx)
[00:42] <Darkside> the straight green lines show the paths from the balloon to receivers that captured that particular packet
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[00:42] <Darkside> thje blue circle (barely visible) is the radio horizon, and the green circle is where the balloon is 5 degrees above the horizon
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[00:42] <Darkside> so the downside of using a RTTY based system is that you need people yo go out and turn on a radio to track it
[00:42] <Darkside> (though you shoudl have your own radio of course)
[00:43] <Darkside> but it uses a hell of a lot less pwoer than APRS
[00:43] <Darkside> we transmit at 25mW, the UK guys use 10mW
[00:43] <Darkside> and its receivable to the radio horizon
[00:43] <Darkside> APRS, being modulated on FM, is less efficient, and needs a bit more power to work. We usually fly 300mW
[00:44] <codrBlu> Wow. So fldgi runs on a standard computer connected to the internet and uses the microphone to capture rtty sounds from any radio capable of receiving your signal, decodes it, and forwards the data on to HABitat.
[00:44] <Darkside> yep thats pretty much it
[00:45] <Darkside> dl-fldigi though
[00:45] <Darkside> its a mod of fldigi
[00:45] <Darkside> stands for 'distributed listener' fldigi
[00:45] <codrBlu> ah
[00:45] <Darkside> and you'd want to use a cable to connect to the radio :P
[00:45] <codrBlu> Ah. Sure. I see.
[00:45] <Darkside> the other issue with RTTY is you need a SSB-capable receiver
[00:46] <Darkside> most 'all-band' ham rigs will do this fine
[00:46] <Darkside> some scanners will do it, and there's always the SDR option
[00:46] <codrBlu> Can you go the other way? Send a command over the internet and have it transmitted by someone's antenna to your balloon?
[00:46] <Darkside> not yet
[00:47] <codrBlu> Can you do that with APRS?
[00:47] <Darkside> that has been discussed, i gave a talk on an uplink system we use on project horus flights
[00:47] <Darkside> not really
[00:47] <Darkside> with APRS you can't transmit a packet out of an arbitrary node
[00:47] <Darkside> not easily anyway
[00:47] <codrBlu> So what methods to people use to transmit to the balloon?
[00:47] <Darkside> we generally don't bother
[00:47] <codrBlu> Ok
[00:47] <Darkside> the balloon is going to pop at some point
[00:48] <Darkside> that being said..
[00:48] <Darkside> we (project horus) fly a cutdown system that i designed, which allows us to cut the balloon away from the payloads
[00:48] <Darkside> that uses a RFM22B transceiver module, which listens for packets from the ground
[00:49] <Darkside> http://vimeo.com/46031355
[00:49] <Darkside> video of the first test flight
[00:50] <codrBlu> How high were you able to talk to the balloon?
[00:50] <Darkside> over the entire flight
[00:50] <Darkside> height doesn't matter
[00:50] <codrBlu> Sweet.
[00:50] <Darkside> note that we don't transmit with a RFM22B module
[00:50] <Darkside> i transmit the packets through a amateur transceiver
[00:51] <Darkside> that lets me boost the transmit power up to 50W if needed (which i've never had to do)
[00:51] <codrBlu> Will "most 'all-band' ham rigs" allow you to do that?
[00:52] <Darkside> not all
[00:52] <Darkside> and you need an amateur licence of course
[00:53] <codrBlu> I wonder if I used 434MHz, if I could do that without a license.
[00:53] <Darkside> no
[00:53] <Darkside> you can't transmit more than 25mW
[00:53] <codrBlu> Ah. And that wouldn't be enough at altitude?
[00:53] <Darkside> which isn't enough to reliably ping the balloon
[00:53] <Darkside> yeah, too much path loss
[00:53] <codrBlu> Got it. Wow. Lots of great info. I really appreciate it.
[00:54] <Darkside> 25mw is fine for the very low baud rate downlink telemetry
[00:54] <Darkside> not enough for the higher baud rate uplink
[00:55] <codrBlu> I would love to eventually do two-way, and I want to make sure that when I buy a radio it will be good for that.
[00:55] <Darkside> you basicallt can't do the uplink side without an amateur radio licence
[00:56] <Darkside> downlink, yes
[00:56] <codrBlu> I am actually studying right now. :-)
[00:56] <Darkside> i think you need more than a technician licence too
[00:56] <Darkside> not 100% on that though
[00:56] <[a]Train> APRS i think you just need the basic licence
[00:56] <codrBlu> Well, my first flight computer won't have uplink, so I have some time.
[00:58] <[a]Train> are you building a flight computer?
[00:58] <codrBlu> Yes. I have experience building systems around Arduino Pro, just not radio or GPS.
[00:59] <Darkside> not hard to link them together
[00:59] <Darkside> not hard at all
[00:59] <codrBlu> Yeah. Just need to better understand the frequency shifting circuit into the NTX2
[01:00] <Darkside> its basically biasing the input to a certain voltage, then shifting that point up and down
[01:00] <codrBlu> Right now I'm learning what frequency NTX I should get.
[01:00] <Darkside> the shift in voltage translating to a shift in output frequenxy
[01:00] <Darkside> 434.075 or 434.650
[01:00] <Darkside> i'd probably reccomend 434.650
[01:01] <Darkside> http://i.imgur.com/bMAWl3T.jpg
[01:01] <Darkside> there's my latest flight computer
[01:01] <codrBlu> With 434.x can I do APRS and RTTY and two-way telemetry?
[01:02] <Darkside> no
[01:02] <Darkside> with the NTX2's you can only do one-way RTTY
[01:03] <codrBlu> Ah right. They are just receivers.
[01:03] <Darkside> no, they are just transmitters
[01:03] <codrBlu> That is a nice Horus board btw.
[01:04] <Darkside> thanks
[01:04] <Darkside> >20 hours off a single AA
[01:04] <[a]Train> file://localhost/var/folders/p_/lv26q1v13jq4q1tlj7678c0r0000gn/T/Messages/Transfers/IMG_3972.jpg
[01:04] <[a]Train> opps
[01:05] <codrBlu> There don't seem to be very many transceiver modules out there. I've only seen the RFM22B
[01:05] <[a]Train> http://www.flickr.com/photos/avader/8638205025/in/photostream/
[01:05] <Darkside> yeah, the RFM22B is the most popular one for our purposes
[01:05] <[a]Train> here is my flight computer
[01:06] <Darkside> [a]Train: what radio are oytu using?
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[01:08] <codrBlu> I guess you could put an NTX and an NRX on the same board to make a tranceiver?
[01:08] <Darkside> kind of
[01:08] <Darkside> but the NRX isn't really the kind of receiver you want
[01:08] <Darkside> i guess it could be made to work
[01:09] <Darkside> no-one has flown one yet though
[01:09] <codrBlu> What is the difference between an NRX and the receiver in the RFM22?
[01:09] <Darkside> the RFM22B will handle packetising
[01:09] <Darkside> and checksumming
[01:10] <Darkside> and, well, demodulation in general
[01:10] <Darkside> the NRX2 will give you a voltage dependent on the input frequency
[01:10] <codrBlu> Ah. It is more of a modem? With the NRX you would have to write your own logic?
[01:10] <Darkside> somewhat, yes
[01:11] <codrBlu> So much to learn. I understand the theories from my EE days, but all the different chips and ways to transmit is still confusing me.
[01:11] <Darkside> the RFM22B can be set into a mode that allows its data transmittions to fit within the passband of a standard amateur SSB transceiver
[01:11] <Darkside> this allows me to record and play back packets from the device
[01:12] <Darkside> so instead of having to use a RFM22B on the ground (with an amplifier), i can play audio files through my amateur transmitter at higher powers
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[01:12] <codrBlu> I see.
[01:13] <[a]Train> Dardkside here is the radio I used http://www.flickr.com/photos/avader/8638227825/in/photostream
[01:13] <Darkside> thought so
[01:13] <[a]Train> I had to go find it
[01:13] <Darkside> we use the same module (though o a different frequency) for our aprs payloads
[01:14] <Darkside> http://rfhead.net/wp-content/uploads/2012/05/aprs_payloads.jpg
[01:14] <Darkside> there's our APRS payloads
[01:14] <codrBlu> member:identifier:%5Ba%5Dtrain where are you located?
[01:14] <codrBlu> aTrain where are you located?
[01:14] <[a]Train> Nebraska
[01:15] <codrBlu> Oh good, another U.S. ballooner. I'm in Ohio.
[01:15] <codrBlu> Seems like the UK has the corner on HAB info on the web.
[01:15] <Darkside> most of the US groups don't publish much
[01:15] <Darkside> apart from 'oh we used aprs'
[01:15] <[a]Train> I have only done one. When I did it I knew 0 of radio, electronics, or balloons but somehow I launched it and got it back.
[01:15] <Darkside> which is boring
[01:16] <codrBlu> We need to change that.
[01:16] <Darkside> all the launches in the US seem to be APRS.
[01:16] <Darkside> only WB8ELK does any serious experimentation with the telemetry systems
[01:17] <codrBlu> Well, I intend to be an experimenter.
[01:19] <codrBlu> It looks like I should get my license and use a 144.x radio to start out.
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[01:57] <griffonbot> Received email: John Couto "Re: [UKHAS] Altitude control with valve"
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[02:26] <griffonbot> Received email: John Couto "Re: [UKHAS] Altitude control with valve"
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[02:55] <griffonbot> Received email: John Couto "[UKHAS] Re: Altitude control with valve"
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[05:22] <griffonbot> Received email: Steve Aerospace "Re: [UKHAS] Altitude control with valve"
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[06:51] <arko> Holy cow... https://www.youtube.com/watch?v=jwC544Z37qo&feature=youtube_gdata_player
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[06:56] <fsphil> I used to think I was pretty good at tetris. thanks :p
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[07:00] <arko> Lol
[07:00] <arko> Thats just wild
[07:00] <arko> Mm breakfast tomorrow morning...
[07:00] <arko> :D
[07:01] <x-f> you can have an UTC breakfast right now :)
[07:01] <eroomde> i just did
[07:02] <eroomde> coffee toast nana
[07:19] <fsphil> I had toast and hot chocolate
[07:20] <fsphil> well toast, waiting on the hot chocolate magically turning into not-just-as-hot chocolate
[07:22] <number10> I was going to bring breakfast and lunch into work.. left it at home :(
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[07:24] <M0TVU> Morning ..
[07:24] <fsphil> morn'
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[07:25] <M0TVU> are there any launches planned for the weeken?
[07:26] <fsphil> oh, you know, loads :)
[07:26] <fsphil> check out the title on http://spacenear.us/tracker/
[07:27] <M0TVU> I'd like to attend one. Get some idea of what's involved and how to go about it.
[07:28] <M0TVU> AVA maybe?
[07:29] <fsphil> you'll need to ask the launchers
[07:29] <M0TVU> yeah. I'll see what I can find out on the yahoo thingy
[07:30] <number10> look at group launch announcement emails
[07:30] <M0TVU> I don't seem to have any
[07:31] <M0TVU> back in a bit off to canteen for toast before the queue builds ....
[07:31] <number10> you need to be in the google group
[07:31] <daveake> It's a google group not yahoo. The flights have been announced there. The AVA one is probably going to be a bit busy with people as it is
[07:32] <number10> https://groups.google.com/forum/?fromgroups#!forum/ukhas
[07:32] <number10> and its an early one
[07:38] <M0TVU> yeah sorry google not yahoo
[07:38] <M0TVU> im in there
[07:39] <Maxell> lol, LAUNCH-O-GEDDON WEEKEND
[07:39] <M0TVU> I think i'll spend this one tracking instead
[07:42] <M0TVU> out of interest where do people buy the balloons from?
[07:42] Action: Maxell is happy he fixed a desktop with remote access for tracking HAB :P
[07:43] <daveake> Balloons - http://randomsolutions.co.uk/Random_Aerospace/Welcome.html
[07:45] <Maxell> "434.074Mhz 8N1 300 baud" intresting :-)
[07:45] <UpuWork> SSDV
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[07:48] <M0TVU> Thanks Daveake
[07:49] <Maxell> Images? Can I do that with dl-fldigi?
[07:50] <daveake> yup
[07:50] <daveake> nothing special to do at all
[07:52] <Maxell> Nice. AVA is also going to float? That means I'll have a great time :-)
[07:54] <Maxell> Regensburg, Germany is a bit far, but wel'll see
[07:55] <fsphil> we need a giant version of this: http://i.imgur.com/b5DK9q0.gif
[07:55] <UpuWork> Maxell : http://imgur.com/sc4YR8a
[07:55] <UpuWork> yes its going to float
[07:57] <UpuWork> Daves is going to float too
[07:58] <x-f> that is gonna scare the person who will recover AVA
[07:59] <Maxell> omg floaters \o/
[08:00] <Maxell> I want rtl_tcp to split the stream
[08:03] <Maxell> UpuWork: lol creepy
[08:03] <UpuWork> :)
[08:04] <M0TVU> In the Steve Randall burst estimator spreasheet what is meant by Launch Volume?
[08:05] <daveake> volume of balloon at launch
[08:05] <daveake> = amount of gas you need
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[08:08] <M0TVU> What is an 'average' payload weight/
[08:08] <M0TVU> I'm thinking 1kg?
[08:08] <jonsowman> average is probably below that these days, but 1kg is fine
[08:08] <M0TVU> Infact I think a lot less actually
[08:08] <daveake> less really
[08:08] <jonsowman> guideline maximum is 2kg
[08:09] <M0TVU> Yeah. more like 1/2 that thinking about it.
[08:09] <daveake> My first one was 1kg, with 2 cameras and GPS backup and a not very small radio tracker
[08:09] <M0TVU> There's only a PCB battery and small camera
[08:09] <M0TVU> I'll get it as light as possible
[08:09] <jonsowman> always a good idea
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[08:10] <M0TVU> Interesting Payload weight has no bearing on burst altitude?
[08:10] <M0TVU> Makes sense I guess
[08:11] <M0TVU> What altitude should I am for on a first launch?
[08:11] <jonsowman> it has no direct dependency
[08:11] <M0TVU> Yeah makes sense. It's just rate of ascent ....
[08:11] <jonsowman> payload weight affects how much helium you put in for a given ascent rate or burst altitude
[08:11] <jonsowman> more helium -> lower burst alt
[08:12] <jonsowman> the thing that actually determines burst alt is the envelope reaching a critical diameter
[08:12] <jonsowman> and of course with more He it reaches that sooner
[08:13] <jonsowman> pV=mRT etc
[08:13] <eroomde> M0TVU: 33km
[08:14] <M0TVU> 350g balloon with 2 cu m 500g payload = 21045. I notice most of you guys hit 30000 and above. Will 21045 be ok?
[08:14] <eroomde> noh sorry
[08:14] <eroomde> you'll get relegated to UKLAS
[08:14] <jonsowman> you've been using vim too much eroomde
[08:14] <M0TVU> Bigger balloon?
[08:14] <jonsowman> :noh
[08:15] <eroomde> M0TVU: no it's fine :)
[08:15] <jonsowman> M0TVU: lol, 21km is fine
[08:15] <M0TVU> ukLAS - lol
[08:15] <eroomde> save the bigger balloons for the second flight
[08:15] <eroomde> once you've got the launching anc ahsing down
[08:15] <M0TVU> So that would be ok for first launch?
[08:15] <eroomde> yep certainly
[08:15] <jonsowman> there's no lower limit
[08:15] <eroomde> sea level
[08:16] <M0TVU> Ok i'll bite the bullet and give it a go
[08:16] <jonsowman> even that doesn't stop some launches
[08:16] <jonsowman> it's the record minimum like 6ft or something
[08:16] <M0TVU> I might break that
[08:17] <number10> I thought eroomde holds the minumim - let ballon go payload not attached
[08:17] <jonsowman> lol
[08:17] <M0TVU> Ok so parachute. What size ? 350g balloon
[08:17] <eroomde> to be fair, it took part of the fill rig as the payload
[08:17] <number10> parachute based on payload mass
[08:17] <jonsowman> M0TVU: ^
[08:20] <M0TVU> Final thing filling tube wossit pipe thingy
[08:22] <eroomde> you got it
[08:24] <eroomde> a bit of hose from the regulator to a bit of pvc pipe
[08:24] <eroomde> maybe 32-40mm in dia - whatever you can find at h9mebase
[08:25] <eroomde> the interfacing between hose and pipe can be done with any sort of engineering you like - on a spectrum between a lathe and gaffer tape
[08:25] <M0TVU> lathe - i'll make one
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[08:26] <M0TVU> Parachute - 30 ins fast descent 36inch slow descent - which is better?
[08:26] <HixWork> Exploding cap anyone http://i.imgur.com/NEyGXTm.jpg
[08:27] <daveake> nive
[08:27] <daveake> nice even
[08:27] <eroomde> M0TVU: whichever you want
[08:27] <eroomde> slower is probably safter
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[08:27] <HixWork> blew straight ijnto my face too, excellent shot
[08:27] <eroomde> but if you are borderline on the predictions, maybe a faster descent might be better
[08:28] <jonsowman> HixWork: :O
[08:28] <M0TVU> Ok 36ins will be better for a heavier payload in future
[08:28] <fsphil> someone bust a cap on yo' face?
[08:28] <M0TVU> oh ok
[08:28] <HixWork> popped a cap in my ass
[08:29] <HixWork> replaced fried vreg on GSM development board and this is what happend on power up
[08:30] <Babs> gangsta hab - "how large does the hole in the capsule need to be for the gun barrel to work effectively?"
[08:30] <fsphil> "When I said blow up the balloon, I meant inflate!"
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[08:32] <HixWork> Haven't got the first clue as to how I know go and find out what is wrong with the board
[08:33] <number10> I bet that cap smells bad - once smelt never forgotton
[08:33] <number10> forgotten
[08:33] Nick change: Guest62179 -> danielsaul
[08:33] <daveake> Well for a cap to blow it was either given too many volts or the wrong polarity or it had suicidal tendencies
[08:34] Nick change: danielsaul -> Guest25648
[08:34] <M0TVU> time for work. Thanks for all the advice and help back later
[08:34] Nick change: Guest25648 -> Guest62179
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[08:40] <gonzo_> how about a shotgun cart in the payload, to remote burst the balloon
[08:40] <HixWork> Nice, the cap is the Vin decoupling cap, so hopefully it's just a swap and go exercise
[08:40] Nick change: Guest62179 -> danielsaul
[08:41] <mfa298> Maxell: if you've got a windows box take a look at http://v2.sdr-radio.com/ for recieving multiple payloads, you might also need something like virtual audio cable to route the audio to different copies of dl-fldigi
[08:43] <Maxell> Yeah, stereo mix isn't going to be suffcient.
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[08:45] <mfa298> with that software you can listen to 6 different payloads - you might start needing several monitors to keep an eye on it all
[08:46] <lz1dev> is that available for download?
[08:46] <Maxell> Yeah, you'd need to install some extra rtl-sdr plugins
[08:46] <Maxell> but i had sdr-radio running on the machine
[08:47] <Maxell> the interface was to noisy. I could not find basic button so i got scared
[08:47] <mfa298> yes, but the links are a bit hidden, they're on the right hand side look for preview 10
[08:48] <mfa298> for the rtl-sdr's i think the extra files you need are under support -> rtl-sdr
[08:51] <mfa298> HixWork: that's an impressive explosion. I've only acheived smoking caps
[08:52] <HixWork> I assume that it was damaged when i fried the vreg
[08:52] <HixWork> and it decided it had had enough on next power up
[08:53] <HixWork> mfa298, and I had to move 5 feet away to get the guts of the cap which i placed nback on the board for the pic
[08:54] <mfa298> some of them age quiet quickly. I had one output one in the psu for my radio go and looking at the data sheet it's only rated for 1000 hours
[08:54] <fsphil> that's a bit useless
[08:55] <daveake> Upu gets more time from a battery :p
[08:55] <mfa298> looking at the data sheets for a replacement a lot of that type have short lives
[08:58] <daveake> What use are they intended for? Because 1000 is almost nothing.
[08:58] <fsphil> maybe it's 1000 hours fully charged?
[08:58] <mfa298> its the output of a SMPS (13.8 @ 20A)
[08:59] <mfa298> they're small aluminium electrolytic. - I suspect the small part is the real issue
[09:00] <mfa298> they're also rated with a max working temp of 105C! which may not help.
[09:01] <HixWork> hopefully the cap on my board blew before taking anything else out
[09:04] <HixWork> or is that unlikely?
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[09:05] <jonsowman> HixWork: what was the cap doing?
[09:05] <HixWork> mostly exploding in my face :)
[09:05] <jonsowman> HixWork: what was the cap _meant to be_ doing?
[09:06] <HixWork> seriously, it goes from Vin to the power buttin for IGT
[09:07] <jonsowman> IGT?
[09:08] <HixWork> assume it's ignition on the MC-35 module
[09:08] <HixWork> basically it needs something like 200ms high to fire up the module
[09:09] <jonsowman> right so holding the button charges the cap which holds the voltage high for >200ms
[09:09] <HixWork> reckon so
[09:09] <jonsowman> in which case I think it's highly unlikely anything else was damaged
[09:09] <jonsowman> but I would check the current limiting resistor (please tell me there is one) to make sure you're not charging the cap too fast
[09:09] <HixWork> was hoping that would be the case. cap goes pop, no curent can flow anywhere else
[09:10] <jonsowman> I assume Vin is below the cap's voltage rating?
[09:10] <HixWork> 5V Vin, no sure what the cap was as it's destroyed and have no schematic for it
[09:10] <HixWork> guessing 12v
[09:10] <jonsowman> and is there a resistor from cap+ to ground to control the discharge?
[09:11] <jonsowman> very fast charging and then slow discharging is not an easy life for a cap
[09:11] <jonsowman> which could be the cause of its demise
[09:12] <HixWork> not by the looks of it
[09:12] <jonsowman> you can replace the cap and it'll work again, but the same issue may reoccur
[09:13] <HixWork> I'll give it a go tonight
[09:13] <jonsowman> really there should be a current limiting resistor between Vin and Vcap+ valued such that the rise time of the cap voltage is a suitable length of time for a user to be pressing the button
[09:13] <HixWork> may be able to solder a resistor inline to the lead then put that in the + through hole
[09:13] <jonsowman> yep
[09:14] <HixWork> look messy but hey
[09:14] <HixWork> gotta love chinaboards.inc
[09:14] <jonsowman> if it prevents explodey-in-face
[09:14] <jonsowman> then it's probably worth it
[09:14] <HixWork> motorcross goggles :)
[09:14] <jonsowman> haha
[09:14] <HixWork> tin helmet
[09:16] <jonsowman> probably better if electronics doesn't come with a PPE warning
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[09:49] <griffonbot> Received email: Steve Aerospace "Re: [UKHAS] Altitude control with valve"