• 17 Posts
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Joined 2 years ago
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Cake day: June 12th, 2023

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  • Time to DIY!

    Waveshare touchscreen for pi, 1200x800 is a good price and for home assistant that is fine. $70/75 for 8inch/10.1inch version. (10.1DP-CAPLCD)

    Raspberry pi 3/4/5 can mount directly on the back of it. For whatever outrageous price Pis are now. (Around here, a 4B/4GB is 60€.

    Wave share PoE hat for $20

    Assemble it like Lego, put it in a wooden frame or 3D print, done. Around 160 USD plus shipping for a full build of a POE battery-less touchscreen display that runs full Linux of whatever flavor. (And is quite overkill as far as power).

    You could probably do it even cheaper with an orange pi zero 3 with a PoE to USB-C converter or a Banana Pi BPI-P2 Pro IoT which has PoE built in.

    It is cheaper than a tablet and strips out the useless things like a battery, camera, really high DPI display, LTE radios, etc… For a simple home assistant kiosk.

    But yeah, epaper displays are 3x the display cost without touchscreen. Though in my opinion, epaper is better for static non-interactive sensor display which can run on battery with an MCU for almost no power because it only has to update once an hour or so.



  • What other people haven’t quite touched on is that the in-built system certainly won’t be powerful enough to run demanding VR games with good frame rates and resolution.

    I also have my doubts about the 6GHz WiFi connection being enough for it, I hope there is also a wired option.

    But it will be awesome to be able to do normal tasks like coding, writing, etc… outside in the garden, as an example. I think for people that don’t have a dedicated VR space, this could be awesome with 6GHz WiFi outside without needing base stations.






  • Hey, something I can maybe help with.

    Flatpak IDEs on the main system are not very useful for development. I got rid of mine entirely. I am developing firmware so it might be a bit different from your case, but what I did in have a single arch distrobox where I could install everything embedded-dev-related that had to work together (JLink, nordic tools, code-oss, etc…) on that. Then a few standalone debugging tools like STLink and Saelae logic2 could be installed to the home folder by default and Code could still find them from the distrobox (but they could be installed in the distrobox also). It doesn’t even need to have an init system, but I ran into a few problems like having to manually chmod usb devices to give STLink access. Udev rules are also hit or miss in /etc/udev/rules.d, e.g. the STM udev rules just don’t work, but nordic does.

    High storage consumption is likely negligible (or at least nitpicky) since storage is so cheap nowadays. Your SSD doesn’t care if it has 15GB or 20GB of system programs, especially when development codebases and SDKs, games, and media will likely make up 90% of space and almost never share libraries even on traditional systems.


  • But actual results and bugs have very little to do with corporate firings or open positions, as 30 years of history show us.

    If corporations “think” they can fire people, with AI as an excuse, and put that cost in their pockets, they will do it. We are already seeing it in the US tech-bro sphere.

    Companies will tank themselves in the medium-long term to make short term profits. Which I think is the “dev market” that OP is talking about. It shouldn’t affect the market, but it will because you have MBAs making technical decisions. I could be wrong, but the tech market is very predictable as far as behavior. They will hire a skeleton crew and work them to burnout to fix the AI slop. (Tech industry needs unions now)


  • What about the performance info is wrong, may I ask?

    Sodium ion has far higher lab-tested cycle count than standard lithium ion/LiPo (3000-6000 cycles vs 300-500, max 1000 cycles) though in reality since sodium iron batteries are a chemistry that has been around for a few years instead of decades, real world is only 1000-3000 for the first generation while lithium iron phosphate still beats it with 3000-5000 cycles real-world, though that lithium chemistry is significantly more expensive, but indeed relevant to grid storage.

    Sodium ion batteries also have a much broader temperature range (-40 to 80C vs -20 to 60C where lithium cells are often capped at 45C to prevent damage).

    Charging times: sodium ion can charge between 2C and 3C while lithium ion is recommended to charge <1C. There are a ton of methods to get around that, but those would likely also apply to sodium ion

    It falls apart a bit more on density, voltage range, and discharge speed.

    Sodium ion can also handle 8C discharge rates, but not up to 10C like lithium, due to their higher internal resistance.

    The voltage swing is way larger (4V->1.5V) which isn’t a huge “problem” per-se, but not convenient as all of the current BMS chips and inverters were made for the very low voltage swing of lithium, so you will need seperate ICs or only use 50% of the capacity.

    And of course the 30% less density or so.

    I don’t think any of those are deal breakers for grid storage or a lot of “general use” when it will be much cheaper as it gets adopted and scaled.

    Very true that it is not optimal for EVs, but there are already Chinese Sodium-Ion EVs that perform quite well outside of the reduced capacity


  • Pretty bad. The whole summer I was pretty depressed from job searching and at the same time trying to get as far as possible on a big renovation that I only ran like 1x per week max.

    Now I started a new job, but the weather was bad so I only got through the first week and a half of my fitness schedule goal then got violently ill. Now I haven’t run or lifted for another 3 weeks.

    Every time I start back up, I get sick immediately, right now my throat has had razor blades in it for 4.5 days such that all I can eat is soup.

    Now that I go to work when it is dark and come home when it is dark, there is even less motivation and I have to find my headlamp or it is just dangerous.