• 2 Posts
  • 118 Comments
Joined 2 years ago
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Cake day: July 10th, 2023

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  • This would work but assumes the primary use of the machine is Windows and derates your performance under Linux significantly due to USB speeds. Even if you’re storing your data on the Windows HDD, NTFS drivers are dog slow compared to EXT4 and other *nix filesystems.

    Also some BIOSes are a pain to get to boot off removable drives reliably so it really depends on what your machine is.

    I’ve used Linux as a primary dev system for well over a decade now, and with the current state of Windows I’d really recommend just taking the leap, keep your Windows box if you need Windows software and build a dedicated Linux workstation.





  • That’s a valid point, the dev cycle is compressed now and customer expectations are low.

    So instead of putting in the long term effort to deliver and support a quality product, something that should have been considered a beta is just shipped and called “good enough”.

    A good example I guess would be a long term embedded OSS project like Tasmota, compared to the barely functional firmware that comes stock on the devices that people buy to reflash to Tasmota.

    Still there are few things that frustrate me like some Bluetooth device that really shouldn’t have been a Bluetooth device, and has non-deterministic behaviour due to lack of initialization or some other trivial fault. Why did the tractor work lights turn on as purple today? Nobody knows!


  • My type is a dying breed too, the guys who do their best to write robust code and actually trying to consider edge cases, race conditions, properly sized variables and efficient use of cycles, all the things that embedded guys have done as “embedded” evolved from 6800 to Pic, Atmel and then ESP platforms.

    Now people seem to have embraced “move fast and break things” but that’s the exact opposite to how embedded is supposed to be done. Don’t get me wrong there is some great ESP code out there but there’s also a shitload of buggy and poorly documented libraries and devices that require far too many power cycles to keep functioning.

    In my opinion one power cycle is too many in the embedded world. Your code should not leak memory. We grew up with BYTES of RAM to use, memory leaks were unthinkable!

    And don’t get me started on the appalling mess that modern engineers can make with functional block inside a PLC, or their seeming lack of knowledge of industrial control standards that have existed since before the PLC.





  • I designed my heating system around a fairly efficient non-condensing NG boiler that takes 40W for the fan. I can run it and the circulators off my battery bank no problem, and handle a sustained power failure. But only because of the natural gas.

    I’ve been integrating a water-water GSHP into it to provide summer cooling and a supplemental heat source from my solar panels. It works well, but in my climate (Rural Canada) I would be insane to completely remove my gas boiler IMO. Heating demand is just way too high on the sort of days where the power goes out. I’ve been working on plans for a wood boiler but insurance has put their foot right down on anything that burns wood in the last couple years.

    Here in Canada we can’t get lithium at a reasonable price so I have 10kWh of lead-acid (which as you know is actually 5). Doesn’t go very far on a cold winter day with 4 hours of sun and snow on the panels!

    On the upside I haven’t had to hook my generator to my house in years, I’m really happy with my “grid-independent” system.


  • Double would be a COP of over 10. That’s a stretch for an overbuilt GSHP and not even slightly feasible for air-air.

    High COPs are usually easy on a compressor as they represent low compression ratios and low differential temps. For example I can hit around COP 7 in cooling on my scrap heap GSHP, with an evap temp around 10C and condenser temp around 20C. That’s a high side pressure around 100 psi and only 30 psi of differential, “barely working” as far as the compressor is concerned.

    The only way I know to get high COPs is to have an oversized condenser and a way to get your refrigerant below ambient, like evaporative, ground source or overnight radiant so you can get the compression ratio down, unless you know a secret in which case I’m not afraid to burn out a compressor or two trying it out!


  • Great to hear this story of success. That plus

    $266.99 per probe for the original proprietary one

    Reminds me of Schneider’s stupid proprietary dongle for programming their PLCs. It’s just a CH341 in a funny shaped case that fits into the funny shaped slot on the PLC, where it plugs onto an ordinary 0.1" pin header to talk logic level serial.

    Plus it has a custom USB ID of course. Probably costs $2 to manufacture, sells for almost $300 as well.


  • The interesting thing to me regarding both power and blasphemy is that by the fact that it was on display in a major cathedral, those in charge have already given it their blessing. Anyone calling “blasphemy” only looks like a fool.

    So you have these “traditionalists” wanting to drag the Church backwards. But due to the hierarchical structure of the Catholic Church that’s just not how it works. Church leadership has made significant progressive strides over the last decade, leaving people like this Tschugguel with only impotent rage and vandalism as their options. And as you state this only adds new context to the art, giving it more power and ensuring that their regressive goals are not taken seriously.

    Meanwhile the Evangelicals have gone absolute nutters, I never thought I would see the day where the Catholics were the “progressive” church. But they play the long game, and have always changed along with society over the millenia.