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warble

Re:I built a hardware processor that runs Python on Monday April 28, 2025 @01:11PM (#43823682)
Wow, these FPGAs are not cheap. Don't they also have a couple of ARM cores attached on the SOC?
Highway speeds are worst case scenario so maybe you're right but I doubt it.

Your charge rate acceptance number is surprising to me, I've never seen anything like this in my years of experience designing EV batteries. Preconditioning helps extreme fast charging but isn't necessary for 1-2 C charges at all unless it's very cold out.

There's some caveats to this depending on the exact chemistry but if anything the newer semi solid state NMC cells are even less dependent on this and can charge down to -20C.

EV battery engineer here. It's not hard. Battery management systems are often over engineered but the state of the art is fairly straightforward and will allow battery packs of sufficient size last 200k miles or more easily.
Re:FFmpeg School of Assembly Language on Sunday February 23, 2025 @10:53AM (#43150134)
You're correct, I don't use SIMD instructions much, but I can, and with a C compiler. So still, not sure the advantage of ASM.
Re:DigiKey's Tariff Resources on Saturday February 22, 2025 @01:15PM (#43141519)
Not true, all my boards have been subject to the tariffs going back to the first Trump administration.
Re:FFmpeg School of Assembly Language on Saturday February 22, 2025 @01:08PM (#43141447)
I highly doubt it's true. I can usually approach the same speed in C if I'm working with a familiar compiler. Sometimes I can do significantly better in assembly but it's rare.

I work on bare metal embedded systems though, so maybe there's some nuance when working with bigger OS libs?

Re:TikTok goes dark in the US on Sunday January 19, 2025 @11:33AM (#42758508)
Which they exert through promotion or demotion of speech. In the end it's still a free speech issue in my mind.
Re:Gravity is not a force on Monday October 28, 2024 @11:48AM (#41972367)
To mimic the effect of gravity on the surface of the earth you could stand on a platform that is accelerating. As long as that platform is accelerating you will experience something similar to gravity on the surface of the earth.

The relative direction of the acceleration would be "up". This is what she means.

Re:All the electricity you'll need for 40 years on Sunday October 27, 2024 @04:27PM (#41965404)
300k on my Toyota right now. Most modern ICE engines should last 200k with no problems. EVs (other than the battery) should last a million miles. Even the batteries are turning out to last longer than everyone expected, ignoring some notable notable failures.
Re:Using SQLite as storage for web server static content on Sunday October 27, 2024 @02:25PM (#41964531)
All of this is easily done on a filesystem too. I would assume this is a performance tradeoff rather than features?
Re:Syncthing Android App Discontinued on Sunday October 20, 2024 @02:38PM (#41897506)
It works, and well, considering the constraints in iOS, but doesn't compare well with Androids version. Regular sync thing on Mac is awesome.
Re:Syncthing Android App Discontinued on Sunday October 20, 2024 @02:36PM (#41897489)
This one is way more battery conscious as well. Works great, I prefer it.
Re:Openpilot – Operating system for robotics on Friday September 20, 2024 @10:42AM (#41602484)
Maybe I'm being ignorant about something here but isn't paying less attention the whole point?
From Wikipedia: https://en.m.wikipedia.org/wiki/NextNav

On March 11, 2024, NextNav announced it signed an agreement to acquire spectrum licenses covering an additional 4 MHz in the lower 900 MHz band (902-928) from Telesaurus Holdings GB LLC, and Skybridge Spectrum Foundation. NextNav acquired the additional spectrum licenses for a total purchase price of up to $50 million, paid for through a combination of cash and NextNav common stock. The acquired licenses are in the same lower 900 MHz band as NextNav's current licensed spectrum. On April 16, 2024, NextNav filed a rulemaking petition with the Federal Communications Commission to deliver a spectrum solution in the Lower 900 MHz band to facilitate a terrestrial positioning, navigation, and timing network (as a complement and backup to GPS) and broadband.

No, probably not there are no phase issues if you just don't transmit the signal. The hard part would be to determine who's in the room, and then who's talking and then mixing appropriately to eliminate feedback and optimize speaker sound quality. None of which requires signal phase accurate synchronicity.

If they're actually able to "sync" (again a poorly defined term) given the problems associated with network latency and different hardware it would border on magic.

I think this is much simpler than what you're suggesting. Careful microphone level management can handle this. No need for audio sync. I know they use the word "sync" but that's a very broad term.
Re:We're Ending Our Samsung Collaboration on Thursday May 23, 2024 @05:24PM (#40460080)
I have the 10 pro and although the camera is definitely an improvement over the 5 I used to own, the overall performance is about the same. I still have my 5, and use it a lot for POS stuff and it's great still. I even have a OnePlus 1 around and it still works decently although it struggles a little with some apps. That's a TEN year old phone.
Re:New gel breaks down alcohol in the body on Tuesday May 14, 2024 @10:57PM (#40362622)
Confirmed. Zbiotics works great. It's a very noticeable difference.
I feel like it's a worse UI and worse experience. By leaps and bounds. Less reliable, harder to operate, over reliant on terrible software and underpowered hardware. Some of the android auto and apple car play stuff is acceptable, but not great.
Re:Updating California's grid for EVs may cost up to $20B on Thursday April 25, 2024 @10:27AM (#40158018)
I live in California and only pay 0.10-0.12 a kWh.
Re:Making Old Orchards New Again on Wednesday April 03, 2024 @08:50PM (#39925244)
I only have experience with citrus, but as far as I know you can graft forever. Some variants don't have seeds, this is the only way to propagate them.
Cheaper to run constantly.
After reading this it's still not clear there's a problem.
Re:Ask HN: How do you document your hardware projects? on Friday January 12, 2024 @01:07PM (#38971610)
Kicad stores as XML as you probably know and is fairly human readable, so I use git on the project folder directly. Works great, although manual merges are a little involved, but I'm never in that position.

Also a lot of notes in the schematics/layout as well, utilizing layers. Overall I'm pretty satisfied.

I don't see any free markets?
Re:Pope tempted by Python. Signs off on coding scheme for kids on Saturday October 28, 2023 @07:23PM (#38054420)
Depends on the exception. Maybe the sun wasn't moral.
Not to mention that this kind of range isn't helpful, it would be much more useful to make the battery smaller and lighter and stay with a 300 mile range. The vehicle would be cheaper and much more efficient overall. This is the kind of headline a marketing department would write.
Re:LSP could have been better on Wednesday October 11, 2023 @11:39PM (#37853254)
What the hell is LSP?
Wow, getting an ideal diode in the real world would be huge for power conversion efficiency and cost. Currently you can get close with a semiconductor switch but there are still inefficiencies.
Re:Tell HN: I think I found Toyota's battery on Thursday August 03, 2023 @02:30PM (#36989783)
Yes this is the real win. Lighter smaller batteries. Better efficiency and easier to design around for safety and maintenance.

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