Dear Tom's Hardware,
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Sincerely,
The Back Button
Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site
181–190 of 221 posts
Re: Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site
#182Earlier quoted context omitted.
This is a camera outside the sub, and the electronics are inside sealed enclosure. If that had any leak for water to get in some conformal coating isn't going to save you, it will get pancaked. Of course random arduino module and teensy used for product is amateur hour, even for low volume production. They must have crazy margins on that camera and producing custom board is very cheap.
>They must have crazy margins on that camera and producing custom board is very cheap. It's expensive in time and expertise to do a custom board, and to debug a custom board. All to what, save 20$ on a bom which might not even be 1% of the profit per unit? Far more efficient to just ship the dev board. They could have perhaps picked a better dev setup to start with, but if it looks stupid and it works...
Point isn't to save BOM cost, margins are high already and they can eat into them.
Unless they are making literally less than 10 of those, custom board will be easier to manufacture than that mess of dev boards and more reliable than random wires and headers all over the place. Plus they can spend money where it makes sense, using better regulators etc.
Re: Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site
#183Earlier quoted context omitted.
On iOS, every browser is required by Apple to use WebKit. I just tried it again myself and FireFox on iPhone has no ublock Origin add on possibility. Firefox Focus does work as an alternative. Apple created a special system-level API for Safari Content Blockers. Apps like Firefox Focus, AdGuard, 1Blocker, Wipr can register filtering rules with Safari using this API. That’s why Focus can block ads/trackers inside Safa…
> On iOS, every browser is required by Apple to use WebKit Didn’t this change recently?
In EU only, and to my knowledge no mainstream browser vendor has shipped a real browser with their own engine yet. Too much work, and they need to maintain two different versions (EU and non-EU). The whole situation is a mess.
Re: Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site
#184Earlier quoted context omitted.
I'm not talking about which methods are being used, I'm talking about which methods could be used. Further, potting, where you let the epoxy drip off, gives you a conformal coating.
Conformal coating is much less viscous and would leave a layer orders of magnitude thinner then letting potting epoxy drip off. It's not at all comparable.
You are talking about a conventional conformal coating.
Re: Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site
#185If a hardened camera can survive, I'm surprised subs don't have a floating black box that can survive an implosion and then float to the surface and begin emitting a radio signal. I guess the trick would be finding a way to securely attach the black box in a way that would ensure its release in a catastrophic disaster.
I'm not aware of anything quite like that, but most submarines have something like a Rescue Buoy [0], Submarine Emergency Position-Indicating Radio Beacon (SEPIRB) or Submarine Emergency Communications Transmitter (SECT). I think those might differ based on whether they're attached by a cable and allow communicating to the submarine, or just broadcast a distress signal with the position. In any case, they're designed to be automatically deployed in the event of an emergency or catastrophic event, and based on this Quora answer [1] they're attached by an independent mechanism with a timer which has to be regularly reset to stop it deploying. I think it might be a clockwork mechanism, with an electronic alarm when it's about to go off to remind the crew to wind it.
[0]: https://en.wikipedia.org/wiki/Rescue_buoy_(submarine)
[1]: https://www.quora.com/Don%E2%80%99t-submarines-have-communic...
Re: Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site
#186Earlier quoted context omitted.
Everything you said makes sense except you haven't explained why you can't just seal up a Teensy in an enclosure and sell it that way, except for "you're not supposed to do that". Are Teensies prone to random failure or something? Because if they just work and you're only selling <50 devices for extremely specialized nieche then I really don't see a problem with this?
(I previously wrote something rather crude. I am attempting to revise that into something more positive.) In this context, all people are free to do whatever they want. It is beyond me to suggest that any person cannot do a thing.
Well, but it's not about whether someone can or cannot do something. Since you seem experienced with these devices I'm just asking if there's any technical reason why this might be a bad idea other than the fact that it just doesn't seem like a very professional thing to do. Like for example even though I'm far from an expert I know Raspberry Pis would be awful for any commercial application because they are notorious for killing their SD cards rendering the device useless.
Re: Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site
#187Earlier quoted context omitted.
> 1. The Camera+Card was encased in a separate enclosure made of titanium+sapphire, and did not seem to be exposed to extreme pressures. I wonder what the price of the enclosure was then. Feels a bit like click bait...
Clickbait? Where? How? It's literally in the NTSB report, and it's not like, a crazy concept?
Here; the title focusing on the price is implying that the cheap SD card survived ocean floor environment alone. A surprising amount of stress for its price.
Instead, a pressure-proof deep sea camera module was found at the wreckage site. It’s less interesting that an expensive thing rated for ocean depths was intact at ocean depths.
Its like “missing child found after 4 days in Alaska temperatures!”
gasp! How did they survive!
“The child was on holiday in their grandparents’ holiday log cabin, with their grandparents, a log fire, food, water..”
Oh. Clickbait. Hiding the boring bit to make the story appear more of a tease.
Re: Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site
#188Earlier quoted context omitted.
On iOS, every browser is required by Apple to use WebKit. I just tried it again myself and FireFox on iPhone has no ublock Origin add on possibility. Firefox Focus does work as an alternative. Apple created a special system-level API for Safari Content Blockers. Apps like Firefox Focus, AdGuard, 1Blocker, Wipr can register filtering rules with Safari using this API. That’s why Focus can block ads/trackers inside Safa…
> On iOS, every browser is required by Apple to use WebKit Didn’t this change recently?
Only for EU.
Re: Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site
#189Earlier quoted context omitted.
Clickbait? Where? How? It's literally in the NTSB report, and it's not like, a crazy concept?
Here; the title focusing on the price is implying that the cheap SD card survived ocean floor environment alone. A surprising amount of stress for its price. Instead, a pressure-proof deep sea camera module was found at the wreckage site. It’s less interesting that an expensive thing rated for ocean depths was intact at ocean depths. Its like “missing child found after 4 days in Alaska temperatures!” gasp! How did th…
That was a laugh I needed and I’m using that in the future. The timing was perfect and I lost some coffee. Thank you!
Re: Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site
#190Earlier quoted context omitted.
Can't bit flip errors also destroy encrypted volumes much more easily?
Most FDE systems are not authenticated so you would only lose one block (16 bytes for AES). Can this be bad? Yeah, but it's not that bad for data recovery.
Not to mention that most drives start having issues with dead sectors rather than bitflips, and that's (usually) 4K.