151–160 of 221 posts
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It's a solid piece of silicon encased in epoxy, so there's nothing really to get crushed. Contrast this to something like a cellphone that's made of hundreds of separate parts and has void space that will get crushed.
Why isn't a cellphone filled with epoxy?
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That’s my entire experience in embedded. Everything I get from other companies basically looks like an internship project right down to the pointer arguments with unspecified bounds on the function calls. One of the companies we bought hardware from keeps representing things are working when they only work on devices in the lab. Almost nobody in the space produces anything professional and everything uses Yocto even…
What kind of hardware projects do you work on? I'm mostly in the software space but in the past few years I've been doing a lot more embedded stuff, and the trend I notice is that companies are making great hardware, and then completely ruining its usefulness with bad software and firmware. It's kind of mind blowing to me because I always considered software to be the easy part of making a product, compared to, you k…
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It continues to amaze me how indestructible SDCards are. Until they're sold as supplemental hard drives ( cough Transcend Jetdrive cough ). Then they'll fail if you even look at them strangely.
Put one in a Raspberry pi and it will be dead in a month.
Write an image to a smallish SD card using dd (to remove most of the blocks from wear-levelling circulation), mount without -noatime, and you should be able to get the lifespan down to a few hours!
Figure 3 from the report- that's an Adafruit sensor module on a 3d printed bit of plastic with a teensy-brand microcontroller just sitting in there! Actually, the entire electronics enclosure appears printed. Very funny to see in what I assume is a million-dollar product.
What was the water condensation situation like in this submarine? Semi bare electronics sounds very very bad.
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.
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I think most would disagree XD. Phones these days are often more expensive than the chair and can be pretty inconvenient to replace, especially if you have nonrecent backups.
Yeah not sure about you guys but me and everyone I know buys their stuff in ikea where a chair definitely doesn't cost more than a good cell phone
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It also amazes me that people are using the internet w/o an adblocker in the year 2025
i was also in shock, then someone reminded me there are iphone users. the horror. paying thousands of dollars just to be forbidden to block ads.
The NTSB's original report has more detail on how the SD Card was encrypted and how the NTSB managed to decrypt it: https://data.ntsb.gov/Docket/Document/docBLOB?ID=18741602&Fi...
The System on Module board is an Inforce 6601 SOM. [0] It uses a Qualcomm Snapdragon 820 and they provide prebuilt Ubuntu Linaro distros for it, preconfigured for the board. The camera manufacturer likely just tossed it straight in as configured and thus didn't know how the full disk encryption was setup. This whole camera design looks like one of those 'we gave this project to some undergrad engineering students who…
> See also: almost any specialty medical electronic device ever manufactured.
These are not design mistakes.
When building products in short runs and where the costs of part have little impact on your margins compared to R&D, it completely makes sense to go for a full computer rather than bother with embedded development where everything is more complicated. Medical also has to deal with certification which is a much more significant concern than saving on parts and will often reuse already certified components.
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What was the water condensation situation like in this submarine? Semi bare electronics sounds very very bad.
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.
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...
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Can I ask why? I'm not really into microprocessors.
Usually (not always), something like a Teensy or a Pi Pico or an Arduino is treated like a development board for prototyping. A person builds out their circuit using hardware they can solder/wire-up by hand on a workbench, maybe even with relatively-giant solderless breadboards, to prove the concept and the general design. And a dev board can be great for spinning a few prototypes. It's quick to get started (code can…
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To add to that. My son got his phone caught in a reclining chair without realizing it. The fact that the phone bent in half instead of destroying the chair is a nice bonus. Replacing the phone was cheap, replacing a chair would not have been — yes, both are insured, but replacing/repairing a chair takes a hell of a lot longer.
I think most would disagree XD. Phones these days are often more expensive than the chair and can be pretty inconvenient to replace, especially if you have nonrecent backups.