• 2 Posts
  • 79 Comments
Joined 5 months ago
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Cake day: March 23rd, 2025

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  • Agreeing with you, just adding to it.

    The same thing happens to any old house, not only soviet ones.

    In my city most houses are close to 200 years old. That’s well before plumbing going into every flat, well before electricity and well before any of the other cool stuff like central heating, internet and so on.

    Most of these houses don’t even retain the original apartment layout.

    Houses are living things that see a lot of change when they get old enough.




  • We did the same thing, going so far as to “build” a simple imaginary CPU. It was interesting but ultimately dead knowledge.

    I built an emulator for that CPU, which the university course took over and used for a few years for the course. But after that I never did anything with logic gates or anything like that.

    I got into DIY electronics lateron as a hobby, but even then I never used logic gates and instead just slapped a cheap microcontroller on to handle all my logic needs.

    I do use transistors sometimes e.g. for amplification, but we didn’t learn anything about that in university.

    In the end it feels like learning how to theoretically mine sand when studying to become an architect. Interesting, but also ultimately pointless.



  • Aliexpress. Spares are €3-6. Quality differs, so it’s a bit luck of the draw if you get a good one. But for that price I could just order a handful different ones and pick the best.

    I printed a cut-off case that doesn’t cover the keyboard attachment part. I just took a random case 3D file for my phone from yeggi.com and cut the bottom part off in the slicer.

    On an old phone I used before I printed the attachment big enough to wrap around the case I was using.

    I hope you didn’t throw out the priv and key. In working order they are ~€150 each on ebay.


  • Not any more waste of time than reading 90% of other tech news (or any news in general). It’s basically entertainment, not education.

    So if I wasted some time reading a interesting article about some prototype technology, I haven’t wasted any more or less time than reading some news article about some other topic that doesn’t affect me.

    I’m not holding my breath that this specific technology will beat Li-Ion in a year and I will not use the article as investment advice, but there’s nothing wrong with using it for free entertainment.






  • LiFePo4 was first brought up in lab experiments in 1996/1997.

    NaIon first came up in the 80s, but were shelved and most research happened in the 2010s.

    But as you rightfully noticed: It took Li-Ion Batteries 20 years to become usable and another 20 years to become really good. Why would you expect that other battery technologies would be faster to market? Many other chemistries are on the market but just haven’t (yet) become better than Li-Ion.

    Battery development is a huge amount of trial and error, and Li-Ion was also a series of throwing things at the wall and seeing what sticks. On the way to develop Li-Ion hundreds if not thousands of chemistries had to be tried, tested and discarded. That specific technology went through multiple companies and research facilities who each discarded the idea when they got stuck and coundn’t find a way around the problems, and then the next company picked it up to continue working on it.