dasv

Ultrasound. I need to record and process signals up to 80kHz, so I need 192kHz sampling. No way around it.

Sorry, I was reading this late at night and must have misread the microcontroller. Then, the limitation lies in the codec and it would not be a minor modification or a matter of trading bit rate for latency.

I need to record ultrasound for work onboard construction vessels, currently we use either specialized equipment for PAM, which is limited in some aspects, or a USB sound card with a SBC and a hacky setup for sending PCM over TCP.

How difficult would it be to extend it to 192kHz, or even 384kHz? Is it limited by the ESP32 hardware?

Well, except for the time their datacenter caught on fire I haven't had any problems.

If you look at the datasheets, the SoCs in the Miyoo handhelds were originally intended for dashcams. I don't know whether these handhelds emerged as a result of excess supply of chips like the RPi or simply it was the cheapest alternative that fit their needs, however.

There are multiple grades of stainless steel, which have different proportions of metals in the alloy. The stainless steel used in the cybertruck's body panels appears to be 301 grade, which is not among the best in rust resistance, and can indeed rust depending on environmental conditions.

Given that 301 stainless is cheaper than 304 or 316, which have similar mechanical properties while having better rust resistance, I would guess that material costs resulted in choosing 301 for the cybertruck.

My metallurgy is a bit rusty (sorry), so take this with a grain of salt (which 301 does not resist well, incidentally!).

Yes, but compared to the setup for equivalent satellite services it is very cheap. The Inmarsat antennas need active compensation and they sit inside big radomes, while the Starlink antennas are smaller and do not need to move thanks to being phased arrays.

The bandwidth, latency and stability that Starlink has is also leagues better than geosynch based solutions, for a much lower monthly price.

Even without considering the better performance, the price makes it viable now to have a internet connections in places it did not make financial sense before.

In addition to that, this photo was taken onboard a cable laying vessel. There are not that many and they are booked back to back all over the world, so it is not of the question that they would have dual metric and imperial measurement devices. Also, onboard a working ship there is usually an international mixture of crew and contractors, and of course they might have American clients.

Yes, but Portugal had colonies in India!

If you don't intend to keep them fully stock there are modern solid-state drop-in replacements for reasonable prices! Given that they are fairly simple cars building one yourself from common electronic parts would not be too difficult either.

Norway is an interesting case regarding government provided services. Easy procedures, clear documentation, but then anything needing human review tends to take exactly six weeks for an answer.

I am partial to 48sx in Android, I find Droid48's UI somewhat uglier.

Also, to answer OP's question: I use the HP48 emulator in my phone very frequently. I have a solar folding 4-key Casio on my work desk which I also use since it is less distracting to fold it open and do some quick calculations there instead of opening a Python interpreter or the scientific calculator app on the computer.

I studied industrial and electronics engineering at university so I have used and abused several Casio fx-82, they are ubiquitous in Spain starting from high school. At uni, I bought an used HP 50G which saved my ass in more than one exam, being able to store equations and having only to input the coefficients saved a lot of time and errors. The programming capability and symbolic math were also very handy when dealing with big matrices. I remember turning a long and messy electronics nodes problem that took half an hour or more to solve by hand into a short program that solved it almost instantly for arbitrary matrix sizes. Having to program my own solution also meant learning the procedure in the process, of course! Not cheating!

I have been meaning to build a lithium battery pack for my 50G, it is true that it eats batteries. I used to buy a new pack before exams just in case. I have a bunch of harvested li-ion cells from disposable vapes that would fit the bill perfectly, just add a TP4056 module, a regulator and some CAD work for a printed enclosure. And a bit of free time, of course.

Curiously, here engineering schools are (were?) partial to HP calculators, TI are not as common to see. My boss still has his 48G on his desk and uses it frequently. I guess it becomes second nature when using it so much during formative years, and I definitely did. Being fast and precise on your calc could bump you from almost passing to barely passing.