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24,294 karma · joined January 8, 2020

aspiring electronics engineer

reachable via avian dot seas at gmail

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picture··on Replacing the old battery on rechargeable bike lights
That seems like an intentional design choice as truly unregulated LEDs without even ballast resistors will burn out.

It's probably this way because companies design products to cater to their customers, who would likely prefer a Damn Bright Light to feel like they got their money's worth.

picture··on Scientists build most accurate atomic clock
You can pull the frequency of a crystal resonator circuit by changing the loading capacitance, for example. You may use a varactor or any semiconductor junction. Doing so doesn't really affect phase noise.
picture··on Attention is all you have
As a counter example, a couple days ago I was to install DaVinci Resolve on a new windows installation, so I searched "davinci resolve." Since I was used to having adblocker, I just clicked the top result, which is titled "DaVinci Resolve" but actually takes you to some awful shady thing like wondershare or softonic/uptodown, I forgot.
picture··on Async Rust vs RTOS showdown (2022)
The gap is a low narrower than those exaggerated numbers. Cortex-M goes to 1 GHz and beyond with MIMXRT117x, while loads of x86 chips down-clocked to the couple GHz or are capped lower, like laptop CPUs
picture··on Meta reaches $16.68B settlement over social media harms to children
What's to say they're ignorant?
picture··on Xiaomi: New CPU matches Apple cores single threaded, much faster multithreaded
Here is an excellent video showing silicon die analysis and comprehensive performance-power curves compared against other leading products. Please skim through it and skip the speculating. https://youtu.be/BCCJuOopLK8

Edit: There are also memory latency charts

picture··on Xiaomi: New CPU matches Apple cores single threaded, much faster multithreaded
While the other comments are correct to point out that majority of mobile workloads are rush to completion, many users (especially in China) still do a lot of heavy gaming on their phones. This is exactly why the newer SoCs are so interesting- that they can deliver more performance for the same power consumption. (Directly increasing run time and decreasing heating)
picture··on Scientists stunned by children's lung recovery in ultra low emission zone
I came across this site which has pretty comprehensive data about PQ curves (the chart for determining CADR given filter impedance) at different noise and power levels: https://www.cybenetics.com/evaluations/fans/204/ (many other fans tested as well but I've been liking the value of P14 Pro PST)

However they look somewhat commercial and I'm not sure the funding/incentives so definitely corroborate with other sources.

picture··on Qwen 3.8 27B is excellent, but it defaults to overthinking things
Well, it's good that there's some competition within the space. More compact/correct/elegant code is simply better code, and people will catch on to that eventually. I think there is a stronger incentive to gain market share and higher profits vs. naively skimming a small additional margin by sandbagging efficiency/performance
picture··on Japanese court overturns Red RAW video patent
It's not the idea of RAW that's being patented, but rather components of "Red RAW" that includes things like compressing before debayering, as the other comment points out. I also remember hearing something about Red having a patent on directly recording to swappable SSDs or something ridiculous like that as well..
picture··on Video2NAND – Abusing video codecs for great computational power
What is this math from? How do you suppose there to be less gates than pixels? Also, different implementations may unroll to different degrees, with some lower thruput hardware doing stuff sequentially by reusing the same logic
picture··on Our position on open-weights models
It's possible for something to be overpriced to the customer and simultaneously underpriced for the business to be profitable. Theoretically speaking, they could just be selling such an inefficient product.
picture··on Ghost Font: A font that humans can read but AI cannot
Is the answer correct? I don't seem to see any demo video with "this is a ghost font" encoded
picture··on The bottleneck might be the air in the room
Electrochemical pile style oxygen sensors continuously deplete themselves whether actively measured or not. Common smart home oxygen piles have a fixed lifetime of a few years, and they're quite sizable (probably about as much volume as a whole smartwatch). Putting the same chemistry in an even smaller package would likely result in lifetime measured in hours
picture··on Polymarket has flooded social media with deceptive videos by paid creators
Yes all forms of gambling, except certain government sanctioned lotteries, are illegal and criminally prosecuted
picture··on Shall we play a game? – LLMs use tactical nukes in 95% of simulations
There's no such thing as a "nuclear" bomb. A bomb is a bomb.

..Is what you are saying?

picture··on A successful Japanese trial of a ramjet engine designed for Mach‑5 aircraft
From my experience with working for defense/aerospace companies as well as civilian b2b ones in the US, the general situation is that defense/aero companies pay less but demands less of a grind. People usually take the lower pay (usually 70% of equivalent role in commercial sector) for the better culture
picture··on Why does it take so long to release black fan versions?
Yes you provide a great example of binning and market separation. Though I think in this case there's some limiting factors that make it infeasible to bin these fancy Noctua fan rotors including: 1) tooling have limited lifetime and will get sloppier and worse yields as time goes on. It's inefficient to use precious cycles of a precise tool and die on producing lower grade parts. 2) the material itself is likely more expensive than what industrial/lower grade use cases require. Why use reject Noctua when you can get regular crappy plastic for 1/500th the cost? 3) I expect Noctua stuff to be a much lower volume than lower cost/quality vendors so the volume of Noctua rejects is likely too low for a company to dedicate a product line using it. 4) brand/marketing reasons

Another obvious use case of binning is for microchips where the same die can be "wounded" to create multiple product variants that target different market segments, and also yield improvement from being able to isolate and disable an area of the die that are defective. However improving the manufacturability and yield itself is still fundamentally important

picture··on Ask HN: Who is hiring? (May 2026)
Are you thinking of futanari?
picture··on Fast16: High-precision software sabotage 5 years before Stuxnet
In pedantic tradition, I would like to gently remind you that there should be a space between a number and its unit, according to SI standard/NIST.
picture··on Just 'English with Hanzi'
> Traditional Chinese relies on context: “Rain heavy, not go”, “雨大,不去了”.

> Modern Chinese demands explicit logic: “Because the rain is heavy, therefore I will not go.””因为雨下得很大,所以我决定不去了。”

Interestingly the "traditional grammar" is much more conversational and natural, while the latter is expected for modern written work.

picture··on Just 'English with Hanzi'
Probably true. Though as someone who can read both English and Chinese, I thought the translations in the article does a good job of representing the traditional vs modern grammar styles. Not sure what more explanation would be necessary
picture··on Hold on to Your Hardware
It seems like you largely agree with the article - people shall own nothing and be happy. Perhaps the artificially induced supply crunch could go on indefinitely.

Also, I wonder how many of us, even here on HN, have the ability to spend that amount of money on computer for personal use. Frankly I wouldn't even know what to do with all the RAM - should I just ramdisk every program I use and every digital thing I made in the last five years?

Anyhow, I suppose for the folks who can't afford hardware (perhaps by design), one ought to own nothing and be happy.

picture··on Student beauty and grades under in-person and remote teaching
China has made for-profit extracurricular tutoring illegal since 2021. [1] Of course there can be under the table operations and discussion to be had about regionally biased gaokao difficulty, but I think it's worth recognizing gaokao being a real chance for upward class mobility, hence why it is so competitive.

[1] https://en.wikipedia.org/wiki/Double_Reduction_Policy

picture··on Iran launched unsuccessful attack on UK's Diego Garcia
How do you know their intentions?

It's also a bit unreasonable to launch live munitions that have some 90% probability of being intercepted by a given system on a good day, while intending for "just a warning"

picture··on Ireland rolls out basic income scheme for artists
There are many things that are valuable to people, but which they would rather not pay for. They include public goods and externalities, like infrastructure and education and a reasonable amount of military. It makes a lot of sense that people would rather enjoy art for free if they had the option, and since the majority of art experience can be easily duplicated and transmitted, why pay for it yourself? There is also another benefit of art stimulating further intellectual and creative development of a society, perhaps yielding second order benefits that are hard to quantify. Thus overall, it can make a lot of sense for government to pay for art as a society.
picture··on Converting a $3.88 analog clock from Walmart into a ESP8266-based Wi-Fi clock
The escapement is "synchronous" in that the motion is controlled by the number of pulses applied to the motor over time rather than the duration/width of each pulse. The pulsetime constant is only to accommodate mechanical/analog differences with the driving circuitry, from what I understand. https://en.wikipedia.org/wiki/Lavet-type_stepping_motor
picture··on Gpg.fail
So what toolbag or workshop of excellent specialized tools would provide the same capability as GnuPG?
picture··on Nokia N900 Necromancy
It's because the phone design needs the battery to help stabilize the voltage under load. As we know, digital devices can nearly instantaneously change the amount of current they consume and thus require layers of energy storage to accommodate the transient currents quickly. However, the changing current consumption doesn't just happen briefly. It sometimes continues to ramp for more than milliseconds (a glacial time frame for modern electronics). Thus generally every component in the power supply network of a design serves some stabilization and filtering role, including the batteries.

It appears that in this case, as the original battery aged, its internal apparent resistance (ESR) increased beyond the original design expectations, to a point where the phone won't work when plugged in to a charging cable because despite the charging cable most likely being able to deliver sufficient power at DC, it had too much impedance to supply it quickly enough. When current is demanded from a source that has too high impedance to supply it, the voltage drops. This will result in significant voltage ripple to the power supply of the digital circuits, which can cause logic to not function correctly.

Adding a large capacitor basically replaced the filtering and stabilization role of the original battery.

Interestingly people often intentionally remove capacitors for side channel measurements and glitching attacks.

picture··on “One Student One Chip” Course Homepage
Yes, and the vast majority of Chinese would now write it as 汉字 instead of 漢字
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