• Montagge@kbin.earth
    link
    fedilink
    arrow-up
    43
    ·
    9 months ago

    HP’s test and measurement division is now called Keysight which was also called Agilient Technology in between HP and Keysight.

  • veroxii@aussie.zone
    link
    fedilink
    arrow-up
    36
    ·
    9 months ago

    I did Electronic Engineering in the 90s and HP stuff was amazing. The HP oscilloscopes were unreal. My trusty HP 48GX calculator still works 30 years later. HP built the best calculators ever made. (TI people have no idea what they’re missing).

    And even their laserjet series of printers were behemoths that lasted decades.

    It makes me literally sick how shit they are now as a company.

  • JiveTurkey@lemmy.world
    link
    fedilink
    arrow-up
    30
    ·
    9 months ago

    I recently threw my HP printer scanner in the trash. It worked fine until I decided to stop paying monthly for ink and they bricked the cartridges and because the ink was dead I couldn’t use the scanner. Fuck HP.

  • KoalaUnknown@lemmy.world
    link
    fedilink
    arrow-up
    30
    ·
    9 months ago

    My mom used to have an HP inkjet with an ink subscription. It stopped working and so she asked me to trouble shoot it. I did a factory reset (per the employee written intrusions on the HP forum) and when I booted it back up, it refused to use the ink cartridges inside of it. Turns out factory resetting it made it think the ink cartridges inside of it were not connected to her HP subscription. And because the printer last reported it has plenty of ink, she couldn’t get new cartridges from HP. When I called HP to try to get it resolved they said I would have to pay for someone to come out and fix it.

    I will never buy anything from HP again, even if it’s an ecotank.

  • reddithalation@sopuli.xyz
    link
    fedilink
    arrow-up
    16
    ·
    9 months ago

    i bought an old hp server to mess around with. took me a few days to find and pirate the firmware update utility i needed. fuck hpe

    • You999@sh.itjust.works
      link
      fedilink
      arrow-up
      9
      ·
      edit-2
      9 months ago

      (stolen from homelab, might help you in the future)

      Individual firmware, ILO and Intelligent Provisioning downloads for HPE servers can be found at https://support.hpe.com:

      1. Search for your machine type - for instance dl380p.
      2. Click on first result representing the correct machine to “select your product”.
      3. Click on Drivers&Software and browse the list to find at least one link per firmware/bios/ILO etc. | OS to deploy from.
      4. On the individual firmware pages, click on Revision History to find specific versions.
      5. Linux downloads can be deployed by following the official instructions for scexe or in case of rpm by unpacking those first with rpm2cpio (search online for more detailed instructions).

      GEN 8: All latest versions available!

      GEN 9: Only “Critical” versions available!

      (see step 4. on how to find them easily)

      note: on gen 9 Intelligent Provisioning can sometimes pull firmware newer than “critical” but only up to its own release date.

      • reddithalation@sopuli.xyz
        link
        fedilink
        arrow-up
        2
        ·
        9 months ago

        Thanks for that, at the time I wanted the SPP to update everything conveniently though, and they don’t provide that. I don’t remember if I could’ve updated things one by one, but I found a sketchy download of it eventually.

  • bleistift2@feddit.de
    link
    fedilink
    English
    arrow-up
    6
    ·
    edit-2
    9 months ago

    If the rise time isn’t 0, it’s not a square wave.

    Also (honest question): Is this a hard thing to do in engineering? What makes it hard?

    • stevestevesteve@lemmy.world
      link
      fedilink
      arrow-up
      51
      ·
      9 months ago

      If the rise time isn’t 0, it’s not a square wave.

      And if that’s your definition then there’s no such thing as a real square wave.

      Just like no physical objects can have a perfectly square corner, there will always be some radius, even if it’s just 1 atom

      The reason making a true square wave is hard is that there are physical properties of real life electrical components that prevent voltage (or current) from changing instantly. Similar to how we can’t instantly accelerate a mass from 0 to some speed, it’s physically impossible. The faster you try to do it, the harder it is due to inertia. In electronics, there’s always natural capacitance and inductance slowing things down. If you want a 10v square wave, you have to push some amount of electrons through some amount of capacitance and inductance and that, while it can be very fast, is never instant.

      • bleistift2@feddit.de
        link
        fedilink
        English
        arrow-up
        22
        ·
        9 months ago

        The more I read of your answer the more I think I should’ve come to that conclusion myself.

    • Num10ck@lemmy.world
      link
      fedilink
      English
      arrow-up
      29
      ·
      9 months ago

      if you get deep enough into software you realize its all ones and zeroes.

      if you get deep enough into electronics you learn there’s actually no such thing as a 1 or 0. check out the bit error rate of an eye diagram.

    • Holzkohlen@feddit.de
      link
      fedilink
      arrow-up
      15
      ·
      9 months ago

      lol 0.02 microseconds is 0.00000002 seconds. Don’t know electronics tho. No idea what exactly makes it difficult.

      • verdare [he/him]@beehaw.org
        link
        fedilink
        arrow-up
        3
        ·
        9 months ago

        It’s difficult because a rise time of zero is physically impossible. You can’t instantaneously jump from one voltage to another in real life; There’s always a transient response. Circuits are made of physical components and electrons are moving objects.

  • numberfour002@lemmy.world
    link
    fedilink
    English
    arrow-up
    5
    ·
    9 months ago

    My very first PC was a Compaq. It was not the cheapest low-end piece of shit available in those days, yet it was still an absolute low-end piece of shit. USB ports broke with minimal use. CD-ROM drive broke despite minimal use. The case started falling apart after a year or so. RAM went bad. I could go on, but you get the point. PIECE OF LITERAL FECES.

    And then they got bought by HP, which was already on my list of PIECE OF LITERAL FECES companies.

    So, that’s when I knew I’d never buy anything HP branded. That was 20+ years ago.

    And literally (I’m using literally in the literal sense), every single person I know who has bought something (anything) HP branded after I advised them not to has regretted their decision. It’s honestly baffling how they are still in business on the consumer end. Their stuff is crap. PIECES OF LITERAL FECES.