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.
In the near to mid future, I think an answer to this question are Internal Combustion Engines. I love electric vehicles and look forward to the tech improving. But the sheer coolness factor of moving a large machine through perfectly timed and calibrated explosions is tough to beat.
It’s why I’m hoping that hydrogen ICE become a thing instead of going to full electric.
It won’t. Hydrogen has terrible efficiency even when fuel cells are in the pipeline. Putting it in an ICE only makes it worse. It’ll have some racing applications, but that’s it.
You have any sources for this? A quick glance at wikipedia says that hydrogen ICE has about the same energy efficiency as gasoline, if the engine is properly tuned.
Yes, that’s correct. Fuel cell efficiency is over 60%. The best gasoline ICE is around 50%, and hydrogen isn’t going to be much better.
The problem becomes especially apparent when you stack the end to end efficiency together. Grid -> battery for battery EVs, and grid -> electrolysis -> fuel cell for hydrogen. There’s a couple of different ways to run these numbers (are you using 120VAC or 240VAC or DC, for example), but when using like-for-like comparisons as much as you can, batteries tend to win at efficiency by a lot. Running hydrogen through an ICE is only going to make its biggest flaw even worse.
Edit: there is a recent breakthrough in fuel cell efficiency that might put it on par with batteries. Note that even if it works in production cars, a fuel cell would be turning an electric motor, not an ICE. https://www.youtube.com/watch?v=ISuUlc8widc
I fucking hate cars, including electric ones… And I still agree. Combustion engines are cool as hell.
Thoughts on motorcycles? Totally fine if you really don’t like them either, I’m just curious :)
Grudging respect.
I don’t like motorcycles either, but they are the “noble steed” of my country’s entire service industry, and being a worker in said service industry is a very sucky (and dangerous!) position to be in.
So I don’t like bikes. But. I respect their riders. Their lives are hard and they are therefore stronger than I.
Interesting, that’s very different in my country so I appreciate hearing your perspective!
Hope you have a good one :)
Please tell me this doesn’t run on gas! Gas explodes, you know?
I recognize that reference, but I can’t quite place it. Futurama? Star Trek: Lower Decks?
maybe I, Robot? been a minute…
It’s from the “I, Robot” movie, but would fit perfectly well in Futurama hahaha
Heinlein’s “The Rolling Stones” had a similar description.
As a subset of this, the fact that carburators worked as well as they did, until we had the technology to invent the simpler fuel injector, I think is pretty cool.
Constant velocity carburetors blew my mind when I learned how they worked, and I got the funniest introduction to them.
I had an Aprilia RS-50 motorcycle which had a slide-type carburetor. Instead of a coin-in-a-pipe throttle, this thing basically had a portcullis across the intake. Pulling on the throttle cable pulled the slide upwards making the aperture/venturi larger, allowing in more air, while also lifting a needle up out of the jet to allow more fuel in. It’s a 2-stroke race bike, so you could easily bog down the engine if you opened the throttle too fast.
Then I bought a Ninja 250F, which has constant velocity carbs. Which also have a slide, AND a butterfly valve. The butterfly valve is operated by the throttle cable to control power. The slide is vacuum powered from the engine, and opens and closes the venturi to keep the air velocity through the carburetor constant, in order to keep the suction at the jet constant. It also has a needle in the main jet which it lifts along with the slide, so the needle’s taper meters the fuel mixture for the amount of air going through the carb. This inherently compensates for air density; if the air is less dense the vacuum mechanism can’t pull the slide open as far so the slide doesn’t open as far, and neither does the needle valve. So it automatically maintains the mixture.
Which is why using constant velocity carburetors on the Rotax 912 engine is such a brilliant idea. A carbureted airplane engine with no cockpit mixture control.
RS50 is such a fun bike, and I know the pain with the carb, I have to ride mine uphill, also, just replaced the 12mm flat slide carb with a 17.5mm round slide, runs quite nice
I had one of the very few of them in North America. I don’t think they ever imported them at any great scale. I bought mine used, and it was obviously used as a track bike. It had a cylinder kit that took it up to about 72cc, the damn thing could do 70.
Whenever I hear a running hit and miss engine it brings a smile to my face, similar with small stationary steam engines. There’s a club in Baraboo WI that does a big meetup once a year where there’s just tons of early tractors and stationary engines powered by all sorts of different types of combustion with all sorts of creative new engine designs that stopped being viable around the time of the first world war. I haven’t been able to go most years but it’s really incredible to see so many wonky engines wirring and popping and hissing and clanking around, all while struggling to reach the performance of a present day lawnmower (and not a good one at that)
And the fact is “mechanic automated” system for me is what makes it even cooler. All you had to do to start is twist it a couple revolutions and bang, it works as long as you have fuel because everything simply works. Of course, today you have electronic fuel injection and so one, but if you want you can make it works just with a lot of metal to do the right parts.
Man, I’ll miss combustion engines (but I hope its use ends ASAP because planet can’t wait anymore)
That’s why I kinda like my carburated 2-stroke motorcycle.
Needs just 3 wires from the engine to work and 1 to shut it off. Weighs just around 100kg and will propel me to 90km/h with just a 50cc cylinder.
Not to mention the smoke, sound, and the narrow powerband, just love that feeling.
Suck, squeeze, bang, blow
Sounds like a good way to spend a Friday evening.
I never knew the complexity of ICE until watching the Garbage Time YouTube channel. They repair old cars (and sometimes break them to fix them later) and show the whole process, but do it as a hobby, so it’s all for entertainment.
Drag disagrees. If you want transportation with fire, ride a dragon. No need to pollute the earth. The emissions make it uncool, just like the ridiculous Mad Max cars.
Does your dragon not fart?
If you want transportation with fire, ride a dragon.
Username checks out. I see you everywhere, and your comments often make me happy.
I definitely agree with you that cars are terrible, and I wish they didn’t exist. Even though I’m a hater, I gotta admit the engineering and history behind them fascinates me, still.
Thank you!
The internet when it wasn’t overtaken by a few major corporations.
The Subaru Outback.
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!
The phones with the internal hidden camera, I was sure it would be the future
https://www.91mobiles.com/list-of-phones/pop-up-camera-phones
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).
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.
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!
Is there some filter that you could put up over the LEDs that would block everything but a very narrow frequency of light?
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.
This was a really cool video!
Also, waving a magnet around a crt was fun.
Yes!
Also, the static on the screen. I don’t mean snow, but the actual static that raised your arm hairs. Whenever my parents needed to leave a note for us, they’d just stick the paper to the TV screen and it would stay there because of the static.
Great way to not have a crt anymore.
Not in my experience. You use a degaussing tool (which is an electromagnet) on crts when the picture gets all “wonky” (technical term).
Nah, that didn’t harm it.
Toasters. Specifically the Sunbeam Radiant Control toaster, with the tag line “Automatic Beyond Belief!”. There is a fan site (https://automaticbeyondbelief.org/, excellent url). Like, what other appliance line has a fan site? Surely no modern day toaster!
But of course I first heard about it from Technology Connections video.
I could mention toasters or pinball machines or flickering light bulbs or unusual people movers, but instead I’ll save some time and just link the whole obligatory channel: https://www.youtube.com/@TechnologyConnections
Technology connections is the gent that inspired this thread. Was watching one of his videos about old camera flashes (LITERALLY TINY FLASHBANG GRENADES. WE USED TO USE FUCKING BOMBS TO TAKE PHOTOS IN THE DARK HOW FUCKING COOL IS THAT???) and figured “huh… There are a lot of old inventions that might suck to use but are conceptually really cool, aren’t there?”
Fun fact, he’s in the fediverse! He’s @techconnectify@mas.to over on mastodon.
I love that about CRTs, man.
How the fuck could we invent a tiny pocket sized particle accelerator electron beam gun that magnetically aimed its fire with such precision as to hit every individual phosphor, with the appropriate charge to make the right color, across an entire fucking screen, and do that 30+ times a second (for TV, or 60+ for a monitor)…
Yet the LCD is the high tech fancy monitor when its just a little grid of globs being electronically fired? How did the CRT get invented before the LCD?!
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
The Internet.
Early to mid 90s was peak internet, even go as far as late 90s still being pretty solid!
Early 2000 was best IMO.
Fair, looking back, was a lot of good on the net still, you thinking around MySpace launch was the last of the good times??
Up to around the launch of the iPhone I guess, the web was so diverse and so many ‘places’, before youtube, google, facebook.
Computers making Fennec Fox noises at each other over the telephone line. And that connected you to the world.
LED panel, which really is just a bajillion very tiny lightbulbs.
It is not, but for the sake of the argument it’s ok.
I’m biased because I’m building up a small collection, but radios were cooler when they were made of Bakelite.
My modest collection:
Also, I realize that digital tuning is more accurate, but there’s something I find very pleasant about turning a knob and the station suddenly comes in clearly. Just that little “aha” serotonin hit.
Any mechanical regulation process that used to be handled by actual machine parts. Think of the centrifugal governor, this beautiful and elegant mechanical device just for regulating the speed of a steam engine. Sure, a computer chip could do it a lot better today, and we’re not even building steam engines quite like those anymore. But still, mechanically controlled things are just genuinely a lot cooler.
Or hell, even for computing, take a look at the elaborate mechanical computers that were used to calculate firing solutions on old battleships. Again, silicon computers perform objectively better in nearly every way, but there’s something objectively cool about solving an set of equations on an elaborate arrangement of clockwork.
The idea of punch card programming blows my mind.
He’s not talking about punch card programming, that’s way more advanced and requires a Turing machine, what he’s talking about is computers as the term was using before what you would think as a computer existed.
The example in the video is for the computer on a cannon in a battleship. If there wasn’t a computer you would need to adjust the angle and height of the cannon, but that’s not something a human can know, what humans can know is angle to the ship and the distance to it, so instead you put two inputs where a human inputs that and you translate that into angle/height. Now those two would be very straightforward, essentially you just rename the height crank to distance. But this computer is a lot more complex, because wind, speed, etc can affect the shoot, so you have cranks for all of that, and internally they combine into a final output of angle/height to the cannon.
That’s cool, but punch card programming blows my mind.
Centrifugal governors are possibly one of the origins of the phrase “balls out” or “balls to the wall” (although many say “balls to the wall” has to do with the ball-shaped handles on old aircraft throttle levers)
Also somewhat similar to governors are centrifugal switches, which are used in just about anything with an electric motor to disconnect the motor from a capacitor which gives the motor a little extra juice to get it going (I like this video for an explanation of how they work)
I didn’t know that was a thing. Thanks! I’m honestly surprised some MBA bean counter hasn’t replaced those with a chip of some sort by now. Really cool!
To add, there is something about those old 40s and 50s era technical films like you linked that is just so… I don’t what exactly it is, but I find them fascinating and genuinely informative, even though they are explaining tech that is decades obsolete.
It’s pretty awesome that they are still available 70+ years later in excellent quality!
H model C-130s, the ones with the 4 square blade props? The engines and props are mechanically governed. There are electronic corrections applied, but the core of the systems are purely mechanical. Still flying.
Source: former flight engineer on them.
Someone showed me a record turntable with what must have been a centrifugal governor! What an ingenious device. (I got the impression from him this was unusual for a turntable, at least…)
I was under the impression that all wind-up turntables (I.e.: from the shellac records and steel needles and mechanical reproducers era) were using mechanical governors
Maybe I’m wrong though.
Oh I know little to nothing about turntables, so you’re probably right :-)
