14 Hacker News comments link this video. Each one links back to its thread.
jodrellblankMar 2022Strongly recommends
In the intro to this video he mentions analogue computers predicting tides. His video before this one[1] goes into detail on that, and it was incredible. In the 1800s, Lord Kelvin spent years working on tidal rise and fall patterns, applying Fourier Transforms to break them down into ten individual sine waves, then combining those sine waves back together to predict future tides. And built analog computers to do all the involved integration, multiplying and summing. It's a part of the history of computing I'd never heard of, despite hearing quite a lot about the dawn of electro-mechanical computers in the early 1900s. [1] ▶ this video
in “We're building computers wrong [video]” · View on HN
o4cDec 2025Recommends
Veritasium made a great video on Kelvin's Tide-predicting machine in 2021. Title: The Most Powerful Computers You've Never Heard Of URL: ▶ this video
in “Tides are weirder than you think” · View on HN
nicoJun 2024Recommends
There is a very good Veritasium video that talks about analog computers and Lord Kelvin’s tide prediction machine: ▶ this video
in “Lord Kelvin and his analog computer” · View on HN
woojoo666Jun 2022Recommends
It's a big area of research in AI. Veritasium has two great videos on it: [link] ▶ this video I found a hackernews discussion for the second one: [link]
in “Photonic Chip Performs Image Recognition at the Speed of Light” · View on HN
cultofmetatronMar 2022Recommends
basicly, we can do things like matrix operations and differntial equations using specialized hardware that performs computation over analog signals rather than buidlign discrete systems. the end result is that we dont' need anywhere near the level of compute to do the job as its done using an analog of the physical process. here's two youtube videos that explain is much better than I could. ▶ this video [link] suffice to say, your average house fly exhibits behavior that absolutely dominates our best drones and with a fraction of the circuitry.
in “Ask HN: What is your take on carbon emissions of Machine Learning” · View on HN
WJWJan 2022Recommends
You might be interested in the analog computers that were used to compute tide tables back in the day. It's quite fascinating how they even managed to do basic Fourier transforms without electricity: ▶ this video
in “Mechanical computing systems using only links and rotary joints” · View on HN
Show 8 more comments
nosianuDec 2025Cites it
So... I remember math including doing quite a bit of geometry by hand and with real tools, at least initially. "Math" is not just the symbol stuff written with a pencil, or with a keyboard. The mechanical analog computers of old (e.g. ▶ this video , or [link] ) are examples too that math is more than symbol manipulation.
in “Animated AI” · View on HN
shagieAug 2024Cites it
The Thomson (also known as Lord Kelvin of degrees K fame) tide predicting machine takes us back to the late 1800s. [link] One implementation of it was a notable part of WWII: > They came to be regarded as of military strategic importance during World War I, and again during the Second World War, when the US No.2 Tide Predicting Machine, described below, was classified, along with the data that it produced, and used to predict tides for the D-Day Normandy landings and all the island landings in the Pacific War. [link] From Veritasium : The Most Powerful Computers You've Never Heard Of - the tide calculator plays a prominent part of the video. ▶ this video (the next video is also in the same topic - Future Computers Will Be Radically Different [link] and that gets into more modern implementations and uses - [link] is the device shown in the video).
in “Basic Mechanisms In Fire Control Computers (1953) [video]” · View on HN
jodrellblankDec 2023Cites it
I used to know nothing about Lord Kelvin except he said things like " It seems, therefore, on the whole most probable that the sun has not illuminated the earth for 100,000,000 years, and almost certain that he has not done so for 500,000,000 years "[1] and allegedly "everything which can be discovered, has been discovered"; until last year's Veritasium video on YouTube[2] about analog computers, and learned he invented tide-predicting analog computers to "substitute brass for brains" and add sinusoidal curves, and a mechanical integrator to separate out individual sinusoidal frequencies from the sum. [1] [link] [2] ▶ this video from about 3 minutes.
in “Ask HN: What are some unpopular technologies you wish people knew more about?” · View on HN
mbivertOct 2023Cites it
Adding to this list of unorthodox approaches, by modern standards: I've heard in some French conferences of Etienne Klein (I'm not sure how romanticized this is though) that Einstein had some breakthrough while being in a half-asleep state. Here's another similar instance[0][1], better documented, of an engineer working on an automatic level recorder, and "realizing" in a dream that it could be used to improve the accuracy of anti-aircraft guns (WWII). [0]: [link] [1]: ▶ this video
in “Hermit 'scribblings' of French math genius Alexander Grothendieck unveiled” · View on HN
mcdonjeJun 2023Cites it
That's really neat. Veritasium did a couple of videos on analog computing a year ago. I'm glad there are people lowering the barrier to entry. ▶ this video [link]
in “An open source, educational, low-cost modern analog computer” · View on HN
ktpsnsMar 2022Cites it
The product presented: [link] made by [link] The company presented: [link] This is the second video (of a series of two) by Veritasium about analog computers. The first one was ▶ this video and discussed on Hacker News at [link]
in “Why Analog Computers May Be the Future of Artificial Intelligence (Veritasium)” · View on HN
abalajiFeb 2022Cites it
The author mentions they were inspired by the Veritasium video on the same topic (without the Lego). [1] I thought I'd link the previous HN discussion. [2] [1] ▶ this video [2] [link]
in “Predicting the tide with an analog computer made from Lego” · View on HN
faeyanpiraatDec 2021Cites it
There is an upcoming Veritasium video about the "comeback of analogue computers". Part one (teaser): ▶ this video
in “France's Jean Zay supercomputer now has an integrated photonic coprocessor” · View on HN