I don’t mean BETTER. That’s a different conversation. I mean cooler.

An old CRT display was literally a small scale particle accelerator, firing angry electron beams at light speed towards the viewers, bent by an electromagnet that alternates at an ultra high frequency, stopped by a rounded rectangle of glowing phosphors.

If a CRT goes bad it can actually make people sick.

That’s just. Conceptually a lot COOLER than a modern LED panel, which really is just a bajillion very tiny lightbulbs.

  • captainlezbian@lemmy.world
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    7 天前

    Tiny lightbulbs fails to express how uncool led tvs are. They’re just diodes. Adulterated silicon. It’s cool in its own way. But yeah. Everything is just silicon

  • SwingingTheLamp@midwest.social
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    7 天前

    Clarke’s third law is that any sufficiently advanced technology is indistinguishable from magic. I have the notion that any technology becomes uninteresting and not cool once reaches the level of magic. We are tactile and inquisitive creatures, so objects that appeal to our hands and perceptions are cool. Once we can no longer grasp the parts, literally or metaphorically, they’re no longer alluring.

    Phones, cars, screens, computers, anything. Why is Amiga HAM mode fascinating to many people still, even when they’re emulating it on a 32-bit-depth screen that can concurrently play high-quality video streamed over the Internet? That’s why.

  • RedFrank24@lemmy.world
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    7 天前

    I dunno about you, but I have a hankering for the mid-to-late-80s aesthetic, but specifically that taken into sci-fi. I’m talking Cowboy Bebop, Outlaw Star etc. 80s tech but… Future!

    Everything’s so chunky and functional. It looks like you could hit it with a sledgehammer and it would still work!

    Basically, BUTTONS! Gimme buttons, lots of big buttons! I want things that go click so I can be sure I’ve pressed them. I don’t want a tiddly little touchpanel for my washing machine, I want a button that goes CLACK when I press it!

  • IzzyScissor@lemmy.world
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    7 天前

    I remember getting a hand-me-down digital ‘black book’ to store phone numbers during the age of the palm pilot. It had a ‘dial’ button and a speaker on the back. You could pick up the phone, put the speaker against the phone’s mouthpiece and it would ‘dial’ by playing the correct tones. Blew. My. Mind.

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    6 天前

    Electromechanical stuff. Like old jukeboxes, pinball machines or anything else that required programming before the widespread use of microcontrollers.

    Some people have already mentioned stuff akin to this, like the mechanical govenor, or the post abt THIS MUSEUM IS NOT OBSOLETE, but it really deserves its own thread.

    Technology Connections on YouTube has made some great videos about devices like that.

    Pinball Jukebox

  • magnetosphere@fedia.io
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    8 天前

    Pneumatic tubes were way, way cooler than email.

    Of course, you could only use them to send a message to someone in the same office building, so the comparison isn’t perfect… but you know what I mean.

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      7 天前

      Before ATMs, bank drive-throughs (the ones with multiple lanes for cars) had pneumatic tubes to send cash and checks to the bank teller, or receive cash.

      Some probably still do. I feel like I used one within the past 10 years.

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        7 天前

        They’re still in use at most banks where I live. Most hospitals use them too; way faster than dumbwaiters

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        7 天前

        I remember those! I wouldn’t be surprised if they’re still in use. I’ve never used the drive-through lane at my bank. I can deposit checks online by taking a picture of it (which still seems weird to me), and I use the ATM for everything else.

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      7 天前

      The factory i work at occasionally still uses them for delivering tests to the lab, pretty cool to hear them swish around in the pipes.

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      8 天前

      I’m not crazy old, but I’m old enough that the supermarket I went to as a kid had these at all the checkout aisles and the cashiers would use them to send cheques/reciepts/ whatever.

      It was awesome to see.

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      8 天前

      Big hospitals still have them to send medications and random lightweight stuff around the complex. My wife has worked in two large hospitals that had pretty extensive tube systems, used especially with pharmacy.

      • Jiggle_Physics@lemmy.world
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        7 天前

        The two major hospitals, relatively near me, use a combination of tubes, and robots, to dispense medications. One is working on completely robotic food service, and has completely robotic floor cleaning/polishing. Both, also, have robots that do the basic landscaping maintenance, like mowing/edging. There is more, it is interesting to walk around and see all these infrastructure systems work. Feels, at least partially, like the promised future of sci-fi.

      • JackFrostNCola@lemmy.world
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        7 天前

        Tom Scott does a youtube video about one in Canada (IIRC) where they send radioactive medicine from the lab a down the road to a hospital due to the half life of the medication making traditional transport (ie vehicles) impractical.

        Edit: bothered to look it up

        • fermionsnotbosons@lemmy.ml
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          6 天前

          I know of a hospital where the local university sends tracers with F-18 for PET scans in much the same way. Half-life of 110 minutes.

  • tal@lemmy.today
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    8 天前

    I like the look of vacuum-fluorescent displays (VFDs) – a high-contrast display with a black background, solid color areas. Enough brightness to cause some haloing spilling over into the blackness if you were looking at it. Led to a particular design style adapted to the technology, was very “high-tech” in maybe the 1980s.

    OLEDs have high contrast, and I suppose you could probably replicate the look, but I doubt that the style will come back.

    https://en.wikipedia.org/wiki/Vacuum_fluorescent_display

    EDIT: A few more car dashboards using similar style:

    https://s3.amazonaws.com/skillshare/uploads/session/tmp/50c99738

    https://www.pinterest.com/hudsandguis/retro-car-dashboards/

    And some concept cars with similar dash:

    https://www.hudsandguis.com/home/2022/retro-digital-dashboards

    Some other devices using VFDs:

    https://i.ytimg.com/vi/PkPSDOjhxwM/maxresdefault.jpg

    https://ae01.alicdn.com/kf/HTB1_TIdcGmWBuNkHFJHq6yatVXaZ/LINK1-VFD-Music-Audio-Spectrum-Indicator-Audio-VU-Meter-Amplifier-Board-Level-Precision-Clock-Adjustable-AGC.jpg

    • Domi@lemmy.secnd.me
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      8 天前

      Many receivers and amplifiers still have VFDs to this day. I still wonder why, LCD has to be significantly cheaper.

      They look cool as hell though, so I appreciate that they go the extra step.

      • toddestan@lemm.ee
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        7 天前

        As someone who also likes VFDs, I’ve fully expected that they’d be extinct in new products by now thanks to cheap LCDs and OLED. But I find it awesome that they’re still hanging in there.

    • ggtdbz@lemmy.dbzer0.com
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      8 天前

      Newer, but I quite like the gentle amber LCD (not LED) displays of my car. At night it’s bright enough and sharp enough without being visually loud. I wish more of these displays were still being made, I’d love to use them in car-centric Arduino projects and data displays that would be consulted at night or that sort of thing.

      I always ask my friends “How the fuck do you live like this?” when I hop into a car and the music UI is a garish color searing itself into my retinas permanently.

      Thankfully, advertising companies have identified this marginal comfort I find in the warm interior lighting of my car and have proceeded to mount insultingly blinding screens all over the city.

      The city being the midrise urban sprawl north of Beirut. What do you mean regulations on brightness habibi? You think you live in Paris? Imagine this: half the street is unlit because the power is out, but the advertising company’s invasive bullshit budget™ has enough foreign cash to burn to keep generators running all night for these shitty ads. Gotta beam an extra few kilowatts of photons straight into this sleepy driver’s eyeballs while they operate a motor vehicle, on a highway that a lot of people cross by foot. There’s a special on fish at the fancy supermarket, how will I live without that knowledge?


      Thankfully, the “state” of Israel has identified that the civilian structures of Lebanon mildly inconvenienced me, and has proceeded to

      • tal@lemmy.today
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        8 天前

        Newer, but I quite like the gentle amber LCD (not LED) displays of my car. At night it’s bright enough and sharp enough without being visually loud. I wish more of these displays were still being made, I’d love to use them in car-centric Arduino projects and data displays that would be consulted at night or that sort of thing.

        Not sure if you mean VFDs or amber LCDs, but Matrix Orbital sells both sorts in small quantities that you’d use in a project and can interface to a microcontroller – I was interested in them myself when looking for small VFDs, years back. They’re going to be segmented alphanumeric or grid displays, though, not things with physical custom display elements like those car dash things, but that’s kinda part and parcel of small-run stuff.

        https://www.matrixorbital.com/

        https://www.matrixorbital.com/blc2021

        Just choose the “amber” option if it’s an amber LCD you want.

        Can also get their displays via Mouser or Digikey.

        • ggtdbz@lemmy.dbzer0.com
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          8 天前

          That’s exactly the kind of display I’m talking about. Nice to see they’re still around.

          The ones I have are all just grids, higher resolution than these but still comfortingly blocky. I’ve actually replaced the dash display recently since the original one got deep fried under the sun and lost all contrast when the weather was above 20°C.

          • tal@lemmy.today
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            8 天前

            Ah, good to hear it. They do (or did, and I assume still do) also have higher res displays.

            Going back to an earlier bit in the conversation, where you were concerned about light sources in the car, I think that auto-dimming might also help (not just with VFDs, but the brightness of any in-car display). My car dash has the option to automatically set brightness based on ambient light levels (something that I wish my desktop computer monitor could do…part of “dark mode”'s benefit is a mitigation for devices that don’t do this). I don’t know if that was a thing back in the 1980s or so, when these display designs were popular.

            I also kind of wonder if eye-tracking, which has come a long way, could be made reliable-enough and responsive-enough to toggle off displays if the car can detect that a user is looking somewhere away from them. Maybe be conservative, not with some critical displays, but stuff like the radio or clock or something. Eye tracking systems normally use the near-infrared, as I understand it, not visible light, so I’d think that you could theoretically do it in a darkened car without problems.

            • ggtdbz@lemmy.dbzer0.com
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              8 天前

              All of the car’s interior lighting (all in amber) does dim automatically when I drive under a bridge or into a tunnel, and automatically dims when I turn on the headlights. So some rudimentary dimming was implemented in 2000 when it was made. No clue where the sensor is though.

  • Semi-Hemi-Lemmygod@lemmy.world
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    8 天前

    Cars used to be cool. Every car company had some kind of sporty car, a couple cheap cars, a big luxury sedan and, a while ago, a station wagon.

    Now every car is an SUV or CUV. Sedans are getting phased out. Cool sports cars don’t make money so they don’t make them. People don’t buy station wagons so they don’t make them. And they’re pushing big, angry trucks on everyone.

  • QuadratureSurfer@lemmy.world
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    9 天前

    Disney lost their old camera tech used to make a “yellow screen” with sodium vapor lights.

    It’s actually better than a green screen because the yellow light is so specific that even if you remove that particular frequency of light, everything else still looks fine. You can do all sorts of things that would normally be very difficult to pull off with any of our green screen tech (like drinking water in a clear bottle or wearing a rainbow dress).

    https://www.youtube.com/watch?v=UQuIVsNzqDk

    • brygphilomena@lemmy.world
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      8 天前

      Considering LEDs are so good at producing a very tight wavelength, I wonder if this could be replicated with more energy efficient lamps.

      Or if non visible spectrum lights can be used to make similar alpha channel masks that don’t affect lighting the scene.

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        8 天前

        A laser, maybe, but definitely not LEDs. Vapor/gas lamps produce the narrowest frequency bands possible, because it comes from very well defined atomic transitions (Hz range). LEDs produce frequency bands with widths in the GHz/THz range, while semiconductor lasers can maybe reach KHz if they are really good. So, unfortunately, for this type of applications, vapor lamps would probably still be needed.

        Source: I work with lasers and spectroscopy.

        Edit: very good idea about using non-visible light!

        • QuadratureSurfer@lemmy.world
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          7 天前

          Is there some filter that you could put up over the LEDs that would block everything but a very narrow frequency of light?

          • pfjarschel@lemmy.world
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            6 天前

            Well, one possibility is using something known as Fabry-Perot filter. It allows an extremely narrow frequency to pass, due to multiple reflections and interferences inside the material. Put the light source material within this filter, and you get a laser. That’s essentially the main difference between a led and a semiconductor laser. The filter makes only a narrow band of the emission be “stuck” there, creating a feedback effect that eventually tends to infinity, and a good chunk of that power passes through the filter reflectors, which are intentionally not perfect.

            Other than that, I don’t think there is a filter that could be as narrow as the line emission from vapor lamps. Maybe using metamaterials, but a laser would be so much cheaper and easier. A vapor laser would certainly get the job done, but they are large and hard to maintain.