<Luke-Jr>
does a photo of mine specifically matter? it looks the same minus the wires
<Luke-Jr>
oh, and the resistors are still there
<Luke-Jr>
not sure if my use case needs them removed yet
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<whitequark>
no i just want to see the general layout
<Luke-Jr>
(nor how to remove them if it does)
<whitequark>
oh i see
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<whitequark>
did you tin the wire?
<Luke-Jr>
yes, I think so
<Luke-Jr>
melted solder and spread it over the wire
<whitequark>
ok
<Luke-Jr>
(at this point I'm questioning everything I thought I knew about soldering)
<whitequark>
so the issue is probably the router using pb-free solder
<whitequark>
put a *very small* blob of your pb/sn solder on the resistor terminal and make sure it melts well and mixes with whatever was on board
<whitequark>
the iron should be set to 300, maybe even 330°C if you work with pb-free
<Luke-Jr>
it just sticks to my soldering iron
<whitequark>
then it is not hot enough
<whitequark>
the tip isn't, at least
<wpwrak>
trivial question first: are you using flux ? :)
<whitequark>
oh ^
<Luke-Jr>
I don't know what flux is?
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<whitequark>
wpwrak: you win okay
<wpwrak>
sometimes it's just too easy ;-)
<Luke-Jr>
the solder is labelled "Standard Rosin-Core Solder"
<wpwrak>
Luke-Jr: flux is what makes the difference between such a solder job being your worst nightmare and it actually working without a fuss :)
<wpwrak>
for SMT and such, you need to add extra flux. what little is in your solder is not enough.
<Luke-Jr>
does this count as SMT? :o
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<whitequark>
rosin-core solder would probably work, if you put the tip at the resistor terminal and then touch the heated terminal with the solder
<wpwrak>
flux can come in many forms. more common ones are syringes (gel), felt pens (liquid), etc.
<whitequark>
yes, of course this counts as SMT, it's an SMD resistor
<whitequark>
wpwrak: rosin-core solder pretty much always worked for me for SMT jobs
<Luke-Jr>
no terminal visible :/
<whitequark>
Luke-Jr: huh? the terminals are the metal caps on the ends of the resistor
* Luke-Jr
wonders if it's normal to have a hard time keeping hand steady
<wpwrak>
Luke-Jr: the felt pens are the most convenient. if you find a pen that dispenses flux through a pipe (a bit like a syringe), they're also nice to use. syringes tend to be a bit messy because it's hard to get the right quantity and you may need to spread it with a toothpick or such.
<wpwrak>
Luke-Jr: only when sober ;-)
<Luke-Jr>
whitequark: yes, but it's so small I can't really see it - just a reflection of a tiny speck of light
<Luke-Jr>
eh, soberness is bad for this? XD
<whitequark>
Luke-Jr: get a loupe then
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<wpwrak>
whitequark: (rosin-core) i wouldn't even know when i tried the last time without extra flux :)
<whitequark>
wpwrak: i usually don't bother. i always use flux for reworking, but not really when initially soldering
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<DocScrutinizer05>
Luke-Jr: hey! long time no see
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<Luke-Jr>
DocScrutinizer05: hm, I've never drunk alcohol before. I guess this is as good a reason as any
<Luke-Jr>
unless there's something else that works
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<xiangfu>
wpwrak: we receive all the components except this KL26 and the PCB.
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<xiangfu>
each component I bought 50 of them.
<wpwrak>
wow ;-)
<wpwrak>
is the KL26 a problem ? or does it just take a little longer ?
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<qi-bot>
[commit] Werner Almesberger: sfc/slicer.py: when flipping, also flip Z positions used for selecting levels (master) http://qi-hw.com/p/cae-tools/4cc43e1
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<xiangfu>
wpwrak: it is just slow. I will get it at 27 Jan.
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<wpwrak>
ah yes, that's pretty slow for this kind of chip. well, nothing we can do about it.
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<whitequark>
niiiice, bundestag has video recordings of meetings available online
<DocScrutinizer05>
80. Sitzung vom 16.01.2015 typical pathetic number of joining dudes
<whitequark>
you seem to have a particularly unflattering view of germany
<DocScrutinizer05>
ssort of, mostly. yes
<DocScrutinizer05>
GroKo, coalition between left and right mainstream, opposition is negligible. Always a poor government, not giving a f* about what the people thinks and wants
<DocScrutinizer05>
aaah satisfaction, well the Germans are satisfied with politics that don't annoy. Which means the less news the better
<DocScrutinizer05>
Merkel's secret sauce
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<DocScrutinizer05>
wpwrak: air asia - same maneuver as that other airbus: steep climb, then sudden drop (prolly after stall). I bet on similar combination of idiocy in autopilot / stall warning programming and instrumentation misguiding
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<DocScrutinizer05>
also funny: google goes global sat internet
<DocScrutinizer05>
bright future for mobile phones everywhere
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<DocScrutinizer05>
though I doubt google will allow VoIP (whatever flavor) except their very own service, and most likely not for free either
<DocScrutinizer05>
I just wonder how to make some bucks from that emerging market for 3 billion dirt cheap embedded mobile sat transceivers
<wpwrak>
"the aircraft was climbing at a vertical rate of up to 6000 fpm exceeding the aircraft's capabilities"
<wpwrak>
that sounds more like a rather violent wind system than an AF447-type incident
<DocScrutinizer05>
well, when the stall warning stops yelling when aircraft speed < 40 knots, what do you expect the pilots to do? Particularly when airspeed iinstrumentation flawed by e.g. ice
<wpwrak>
also, the pilot was extremely experienced. former fighter pilot, etc. the sort of AF447 mess seems extremely unlikely there.
<DocScrutinizer05>
hmm, sound reasoning
<DocScrutinizer05>
but why the crahs after that extreme climb then?
<DocScrutinizer05>
AF447 the pilot wasn't even in cockpit afaik, he joined later (pissing? coffee? sex?) and failed to grok the situation
<wpwrak>
the plane may have ended up at a place where it couldn't fly on its own. or maybe it suffered structural damage as a consequence of that ride.
<DocScrutinizer05>
structural damage from winds? not heard of during last ~50 years, right?
<wpwrak>
well, the PIC was out of the cockpit. but also note that AF447 was a long flight. QZ-8501 was comparably short. so they didn't need to rotate the cockpit crew.
<DocScrutinizer05>
(except during landing)
<DocScrutinizer05>
hope they soon will decode the voice recorder
<wpwrak>
(structural damage in flight) doesn't happen often, but it does happen. also, there have been numerous incidents in the preceding weeks just in the general area with severe turbulences. so one can assume that the conditions were worse than normal for the season
<DocScrutinizer05>
however >>the aircraft was climbing at a vertical rate of up to 6000 fpm exceeding the aircraft's capabilities, its airspeed decreased and it appears the aircraft entered a stall<< sounds exactly like AF447
<DocScrutinizer05>
extreme conditions been what canceled out the autopilot on AF447
<wpwrak>
AF447 was fully flyable at the time it stalled. QZ-8501 may not have had that luck.
<DocScrutinizer05>
W*T*F?!
<wpwrak>
and yes, pilot overwhelmed when the AP disconnects is a surprisingly common cause of death
<wpwrak>
but the again, this was a pilot with real flying experience. not just "take off, turn on AP, take a nap, autoland, go home"
<DocScrutinizer05>
hehe
<wpwrak>
of course, even experienced people can make mistakes. but in this case, it doesn't look like a basic aviation failure like in AF447
<DocScrutinizer05>
as scary as all AF447 series of events was, my first reaction been "I prolly had shut down all instrumentation and flew the bird from my ass sensors only"
<DocScrutinizer05>
yeah, I know my senses, so that's prolly why I say so. A frequent pattern when I run into weird instrumentation readouts of any kind. I'd prolly trigger the sparks of my car engine manually when I suspect the engine control is doing nuts
<wpwrak>
the #1 rule in aviation if you can't see where you're going is to only trust your instruments, not your senses
<DocScrutinizer05>
hmm, damaged landing gear? Doesn't look unusual or spectacular
<wpwrak>
guess there were many dead pilots who trusted their senses as much as you trust yours ;-)
<wpwrak>
it's not the blown tires, it's the taxiing ...
<DocScrutinizer05>
ooh, ignoring all rules?
<wpwrak>
these dead pilots may be the reason why these rules are there ...
<DocScrutinizer05>
"damg thing doesn't woll, give a tad more throttle!"
<wpwrak>
yeah :)
<DocScrutinizer05>
omg
<DocScrutinizer05>
"dang thing doesn't roll, give a tad more throttle!"
<DocScrutinizer05>
I doubt the pilot even noticed
<wpwrak>
"let's just taxi with take-off thrust" :)
<DocScrutinizer05>
(trust senses) look, the difference is: I only overrule the instruments when they act extreme (stall warning etc). When my senses act extreme while instrumentation is pretty normal, I'd never even poncer which to trust more
<DocScrutinizer05>
ponder*
<wpwrak>
hehe :)
<wpwrak>
but yes, LH-1829 was a very nice example of what to do when the plane is acting weird. don't bother debugging the computer, just fly.
<DocScrutinizer05>
I'm not going to fly head down thinking all horizons went mad
<DocScrutinizer05>
exactly
<DocScrutinizer05>
(not knowing LH-1829 case, just ack'ing the general approach)
<wpwrak>
NB: in the comments someone explains that this aircraft has a wingspan of 34 m
<DocScrutinizer05>
>> actually airbus should Have a simple computer protection override switch<< hehe!
<wpwrak>
i guess it's a two-edged sword: airbus are pretty aggressive with automation, and i think this does make the planes safer. on the other hand, it also means that pilots with insufficient training can fly them for years without any sign of trouble.
<DocScrutinizer05>
also the meaning of "insufficient training" suddenly changes when the computer can outsmart the pilot
<DocScrutinizer05>
when APA(?) can force node down and pilot can't overrule that - e... :-((
<DocScrutinizer05>
nose*
<DocScrutinizer05>
I shouldn't type today
<wpwrak>
it's the ADRU that implements alpha protection (alpha being the angle of attack. i.e., the thing that was waaaay off in AF447)
<DocScrutinizer05>
AOA
<DocScrutinizer05>
yep
<DocScrutinizer05>
no idea about all that, it's my friend and landlord who got a license, not me ;-)
<DocScrutinizer05>
I think that's what he told me about - weird messy actions on horn (sidestick), right?
<wpwrak>
i kinda wonder if the computers in the airbus also do a longer-term assessment of the effect of their actions. e.g., would LH-1829 eventually have stopped the descent on its own ?
<wpwrak>
yup. and look at the angle of attack.
<DocScrutinizer05>
sorry, mimetype odd, doesn't play in any video player on my machine
<wpwrak>
that AF447 simulation reminded me a bit of how i "fly" in a flight simulator when i try it for the first time and haven't read the instructions
<DocScrutinizer05>
(would have stopped) aiui nope
<wpwrak>
download, then view ?
<DocScrutinizer05>
the suppositious angle of attack?
<DocScrutinizer05>
(download) meh!
<DocScrutinizer05>
"open with" vlc
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<DocScrutinizer05>
bwoahh scary
<DocScrutinizer05>
what's the A321 going to "do" when lft and right sidestick are diametrically opposite steering position?
<DocScrutinizer05>
seems the pilots trained on a spaceshuttle ;-)
<DocScrutinizer05>
though, only regarding angle of attack and sink rate/mode, not regarding taking into account the fact that such a critter reacts on steering like a wet sponge
<DocScrutinizer05>
my friend told me there's just two things to care about, after making sure fuel=100% and liftoff: altitude and speed. lots of both
<DocScrutinizer05>
I really don't understand what the pilots tried to do. Why didn't they push throttle to max and nose down?
<DocScrutinizer05>
I mean, even in their coffe cups they must have seen that the plane is nose-up or at least not too much nose-down
<DocScrutinizer05>
and the airspeed meter was between 60 knots and zero most of the time, right?
<DocScrutinizer05>
did they just check altimeter and conclude they need to pull up to stop decline?
<DocScrutinizer05>
don't pilots train to get a plane out of stall?
<DocScrutinizer05>
they must have been in that situation in simulator before, no?
<wpwrak>
(two things to care about) that's the aviation part. you may also want to pay attention to navigation from time to time. especially if you live in a mountainous area :)
<wpwrak>
there seems to be a specific "unreliable airspeed" procedure that would have saved them. why they didn't will remain their secret forever ...
<wpwrak>
(opposed sidestick) that's when you get the "Dual input" warning
<DocScrutinizer05>
(spaceshuttle) even for that the "landing" procedure would be incorrect - way too low airspeed
<DocScrutinizer05>
(dual inp) I guess captain's sidestick rules then
<DocScrutinizer05>
hmm, maybe not
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<DocScrutinizer05>
I bet there's some other weird rule that aims to cope with erratic input from epileptic attacks, defect sidestick, et el
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