warble

Joined 16 years ago

Karma
207
Submissions
156
Member since
Nov 21
[ my public key: https://keybase.io/micahstev; my proof: https://keybase.io/micahstev/sigs/Tb4WCgoSgDjpAclCHzI-99-Sd8JWqDciGftSkEO6UwI ]
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Recent submissions

Comment · 1 year ago
Wow, these FPGAs are not cheap. Don't they also have a couple of ARM cores attached on the SOC?
Comment · 1 year ago
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.

Comment · 1 year ago
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.
Comment · 1 year ago
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.
Comment · 1 year ago
Not true, all my boards have been subject to the tariffs going back to the first Trump administration.
Comment · 1 year ago
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?

Comment · 1 year ago
Which they exert through promotion or demotion of speech. In the end it's still a free speech issue in my mind.
Comment · 2 years ago
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.

Comment · 2 years ago
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.
Comment · 2 years ago
All of this is easily done on a filesystem too. I would assume this is a performance tradeoff rather than features?
Comment · 2 years ago
It works, and well, considering the constraints in iOS, but doesn't compare well with Androids version. Regular sync thing on Mac is awesome.
Comment · 2 years ago
This one is way more battery conscious as well. Works great, I prefer it.
Comment · 2 years ago
Maybe I'm being ignorant about something here but isn't paying less attention the whole point?
Comment · 2 years ago
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.

Comment · 2 years ago
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.

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