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OniPanda posted:Yeah, usin lead-free solder to do surface mount soldering without a reflow oven sucks. Especially with components linked to a pour. I work with critical infrastructure devices in industrial control networks. That poo poo is expected to last decades, indeed. Many big names won't even use equipment that doesn't have a decade or two or three of proven service. The Motorola 68k is still widely used, as are the numbered Intel x86 CPUs
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Mar 13, 2019 17:41
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Has Intel space rated any of their later CPUs or are you still stuck with a 386 if you want x86 in space?
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Mar 13, 2019 18:21
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A lot of the chips my work tests for aerospace use are lead free versions (only version available) that are sent out to have their leads tinned.
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Mar 13, 2019 18:27
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So can we put the Max 8 in here yet cause uh, I think it's gonna be the next DC-10.
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Mar 13, 2019 18:35
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Gynocentric Regime posted:So can we put the Max 8 in here yet cause uh, I think it's gonna be the next DC-10. Hopefully this debacle adds Government Shutdowns to the list of obsoleteness.
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Mar 13, 2019 19:00
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FilthyImp posted:Maybe the Max 8 anti-stall software. I know the design itself has greater stall dangers thanks to its engine placement, but it seems the software and training is what's doing it. Wings aren't just falling off of carbon fibre bodies or engines wrenching from the frame... yet. Well a lot of the big DC-10 problems weren't systemic either, but once you get a reputation it's hard to shake.
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Mar 13, 2019 19:47
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FilthyImp posted:Hopefully this debacle adds Government Shutdowns to the list of obsoleteness.  you know that'll never happen
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Mar 13, 2019 19:57
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Gynocentric Regime posted:So can we put the Max 8 in here yet cause uh, I think it's gonna be the next DC-10. I think it’s more training and bad luck. It’s possible Boeing oversold the Max 8 as not needing extra training when it did. But witnesses say the Ethiopian plane was on fire before it crashed, which isn’t going to be an auto-pilot, sensor, or training issue.
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Mar 14, 2019 04:09
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Lurking Haro posted:I wonder how much RoHS has increased electronic trash due to brittle, dry or cold joints and tin whiskers. Bare minimum, there was a class action lawsuit against Apple in 2014 specifically stating that the use of lead-free solders lead to tin whisker formation and caused really fucky poo poo with video display and necessitated repairs. But I haven't been able to find any kind of resolution to that.
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Mar 14, 2019 04:41
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Oops looks like an expensive insurance claim for the owner of EEVBlogs building: https://www.youtube.com/watch?v=_2LIOaZz3dw
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Mar 14, 2019 13:03
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Loöks like Björk is re-releasing a bunch of her albums on tape https://bjork.lnk.to/cassettes so goes its march into Hipster Niche music format
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Mar 14, 2019 17:02
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Collateral Damage posted:Has Intel space rated any of their later CPUs or are you still stuck with a 386 if you want x86 in space? Why would you specifically want x86 in space? There seems to be a lot of rad-hardened POWER chips around (relatively speaking).
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Mar 14, 2019 17:11
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Don't you have to specifically make the chips in a way that hard vacuum won't blow out the circuits? Or am I thinking of tube systems.
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Mar 14, 2019 22:19
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I'm nostalgic for making and trading mix tapes on cassette (I've yet to find a suitable modern substitute) but I have no idea why anyone would want to listen to a normal album on one in 2019 other than novelty factor. Vinyl is a nice big piece of shelf candy art and has "warmth", at least.
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Mar 14, 2019 22:28
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Kwyndig posted:Don't you have to specifically make the chips in a way that hard vacuum won't blow out the circuits? Or am I thinking of tube systems. The inside of a tube is already as close to a vacuum as practically possible, so at a guess they would be some of the least affected components? (Unless the glass being under compression contributes to their rigidity?) I wonder if some of the physical packaging of chips could trap air in ways that would cause problems in a vacuum, though - it wouldn't surprise me. Still, probably easier to handle than "has to return correct results while being hit by heavy radiation"?
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Mar 14, 2019 22:49
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Imagined posted:I'm nostalgic for making and trading mix tapes on cassette (I've yet to find a suitable modern substitute) but I have no idea why anyone would want to listen to a normal album on one in 2019 other than novelty factor. Vinyl is a nice big piece of shelf candy art and has "warmth", at least. Sometimes it's nice to pop one in when you're driving. If I buy cassettes that's usually where I play them.
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Mar 14, 2019 23:45
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how old is your car if you still have a cassette player in it?
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Mar 15, 2019 01:00
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flatluigi posted:how old is your car if you still have a cassette player in it? 2010 was the last year of tape decks in cars, in the Lexus SC430.
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Mar 15, 2019 19:03
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flatluigi posted:how old is your car if you still have a cassette player in it? Old enough to drive.
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Mar 15, 2019 19:14
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Many small sats only have a life of a few years and deal in numbers(planet is the example I am thinking of here) are they cutting corners with this stuff to save some money or are they compelled to use better materials by underwriters?
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Mar 15, 2019 21:16
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Mercury Ballistic posted:Many small sats only have a life of a few years and deal in numbers(planet is the example I am thinking of here) are they cutting corners with this stuff to save some money or are they compelled to use better materials by underwriters? What
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Mar 16, 2019 05:33
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Sorry that was badly worded. There are companies now putting up lots of small satellites that have a short service life. I was wondering if the short expected service life means they can cut corners in production, or if some other regulations prevent that.
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Mar 17, 2019 04:21
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I would imagine with how expensive it is to get any payload into orbit, that's the kinda thing that doesn't get cheaped out on, since even short lifespan vehicles aren't useful if they don't survive the trip.
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Mar 17, 2019 06:05
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It was either this thread or the other redundant obsolete tech megathread that introduced me to LGR, but that was some great poo poo to watch right before bed and fall asleep to. I'm running out of episodes now though. Any other Youtube channels with hundreds of videos reviewing old games and tech? It's not boring to me, but makes for a nice interesting backdrop to keep my brain busy so it doesn't think about stressful things before I conk out. LGR has a fairly relaxed narrating voice compared to other Youtube games/tech people and I wish I could find more like that.
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Mar 17, 2019 06:09
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8-Bit guy is another 1980-2000 computer enthusiast. Teachmoan is another good tech reviewer, with reviews on modern and older mostly esoteric A/V equipment and formats. Technology Connections is a great YouTuber who will teach you how analog TV works and convince you that your city is using the wrong light bulbs in it's street lighting and signals.
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Mar 17, 2019 06:13
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Wasabi the J posted:8-Bit guy is another 1980-2000 computer enthusiast. 8-bit guy also this other channel called 8-bit keys where he talks about old 80's keyboards made for children and/or amateurs: Here It's surprisingly interesting.
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Mar 17, 2019 13:23
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Wasabi the J posted:8-Bit guy is another 1980-2000 computer enthusiast. I like how Techmoan brushes off criticism of his work. He's just a guy who enjoys his subject matter without claiming to be the definitive expert.
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Mar 17, 2019 14:46
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I haven't had any issues using random-rear end non-aerospace rated chips in vacuum. Not in space but at high vacuum for weeks while everything outgases so I can refill it with radiation detector gases without the outgassing contaminating it. If they have air inside them it probably wouldn't be an issue if it found a way out anyway.
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Mar 17, 2019 14:58
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There's also AkBKukU and RetroManCave. AkBKukU bounces around a lot but he does a decent amount of retro hardware, with lots of circuit-level repairs which is great sleep entertainment. RetroManCave is really slickly edited and also does some repair work, but he's almost too slick and the videos can get kind of boring as a result at times.Wasabi the J posted:8-Bit guy is another 1980-2000 computer enthusiast. Strong recommendations for Techmoan, it's real good stuff. The 8-Bit Guy is also good, but he leans really hard into 'stereotypical nerd' including not having the best presentation skills. His unboxing vids in particular can get rather uncomfortable since he seems to be more annoyed than anything at doing them. The thing that really turned me off of those was when he skimmed through a letter that came with a package and didn't comment at all that it said all the things belonged to a now deceased person and the family was donating it all to him because it'd be the best home for it. Just flashed it on the screen and started going through the box.
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Mar 17, 2019 15:10
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Mercury Ballistic posted:Sorry that was badly worded. There are companies now putting up lots of small satellites that have a short service life. I was wondering if the short expected service life means they can cut corners in production, or if some other regulations prevent that. Designing for the life of your satellite isn't "cutting corners," it's good design. There aren't regulations that say how long your satellite needs to last.
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Mar 17, 2019 15:23
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BattleMaster posted:I haven't had any issues using random-rear end non-aerospace rated chips in vacuum. Not in space but at high vacuum for weeks while everything outgases so I can refill it with radiation detector gases without the outgassing contaminating it. It's not just vacuum, there's a hell of a lot more radiation once you get up there. poo poo, DEC once sold an Alpha cluster to LANL, and while the non-ECC cache worked in Massachusetts, it kept getting corrupted and crashing due to cosmic rays once they installed it at 7,000 feet.
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Mar 17, 2019 16:40
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Yeah it takes pretty high doses of radiation to start loving up microelectronics which the equipment I make isn't really exposed to. A while ago we were using an old consumer router donated by a colleague to talk to ethernet-connected equipment in a bunker with a D-D neutron generator and a 10 Ci cesium-137 source and after a little while it started to flake out badly. I have no evidence that it was actually related specifically to the radiation and all of our other equipment works without a hitch, but all of our equipment is expensive stuff built for the job so who knows. I had it replaced with a fancy Edgerouter X which probably isn't radiation-hardened either so it will be interesting to see if it eventually flakes out too and after how long. edit: I would love to work on a project some day related to radiation damage of electronics linking radiation track structure to the structure of individually transistors similar to how we talk about DNA damage from radiation in a living cell but I don't know if that is interesting/fresh enough to get funding because it isn't really my area BattleMaster has a new favorite as of 17:59 on Mar 17, 2019 |
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Mar 17, 2019 17:55
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I have worked at the Waste Treatment Plant in the past. Some portions of the facility are being designed for 300k rad/hr. There are very few electronic components in those areas and the few that are there are very expensive radiation-hardened special versions and heavily shielded. Example: Hardened camera, electronics behind 10 inches of leaded glass. Our cold war legacy is frightening.
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Mar 17, 2019 20:47
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TotalLossBrain posted:I have worked at the Waste Treatment Plant in the past. Some portions of the facility are being designed for 300k rad/hr. There are very few electronic components in those areas and the few that are there are very expensive radiation-hardened special versions and heavily shielded. Example: Hardened camera, electronics behind 10 inches of leaded glass. Our cold war legacy is frightening. why bother if there's no one left to drink the water?
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Mar 17, 2019 20:59
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boblemoche posted:Old enough to drive. That made me think...if we do perfect self-driving cars is it still a self-driving car if a car drives another car?
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Mar 17, 2019 21:14
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ToxicSlurpee posted:That made me think...if we do perfect self-driving cars is it still a self-driving car if a car drives another car? You mean like a tow truck? 
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Mar 17, 2019 21:24
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Somebody suggested I post this here. It's a write up of that proposed 1950s atomic train locomotive.
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Mar 17, 2019 21:43
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Nebakenezzer posted:Somebody suggested I post this here. It's a write up of that proposed 1950s atomic train locomotive. I'm reading now. This is how you prototype Snowpeircer.
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Mar 19, 2019 12:15
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Every time I think there's no more obscure formats left to cover Techmoan posts a video of one. https://www.youtube.com/watch?v=fT3_cS1KNYc I wonder how many obscure formats there actually is, feels like there's millions of them and techmoan have them all stored in his garage.
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Mar 19, 2019 12:36
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ishikabibble posted:Strong recommendations for Techmoan, it's real good stuff. The 8-Bit Guy is also good, but he leans really hard into 'stereotypical nerd' including not having the best presentation skills. His unboxing vids in particular can get rather uncomfortable since he seems to be more annoyed than anything at doing them. The thing that really turned me off of those was when he skimmed through a letter that came with a package and didn't comment at all that it said all the things belonged to a now deceased person and the family was donating it all to him because it'd be the best home for it. Just flashed it on the screen and started going through the box.
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Mar 19, 2019 13:24
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