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Comment Foundry business (Score 2) 13

Not surprising. Tesla is its 5th generation (AI5) processor, currently manufactured by Samsung and TSMC. I suppose they imagine there are others that will want to use these for their own purposes. Musk is creating his own supply of chips for SpaceX at his TX Terafab. Having terrestrial customers to absorb some of the supply and provide revenue as that ramps up the obvious thing to do.

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Journal Journal: SQL: * expansion inside of EXISTS()

[Used gemini for formatting. It seems to have edited the text somewhere, and the table on bottom is atrocious. I ought to come back to this later. It's too late to continue with it now.]

Comment Re:Wow (Score 2) 73

we're fucked

Perhaps not. There are Chinese fabs that can't make HBM, but can make DDR5. Corsair is now (as of about 2 weeks ago) selling modules with CXMT RAM. That's the first time one of the "major" RAM module manufacturers have turned to Chinese chips.

That may be the answer to the DDR5 shortage over the next year or so.

Comment Nice (Score 2) 28

Great. New fab in the West. It's just power stuff; silicon carbide FET and whatnot. Still, if concern for "sovereignty" is what it takes for bedroom community Europe to get off the dime, then good for them. Better than being industrial vassals of the US, China and Russia, which is where they've been heading. Feel free to make more "sovereign" fabs.

Comment Re:I want to see inexpensive plugin hybrids but .. (Score 1) 135

You might want to read up on how current hybrid vehicles actually work, 'cause it seems you have more than one misconception going on.

I have. For instance, my latest vehicle is the Ford F-159 XLT,, the full-hybrid model of the F-series pickup truck line. Power train is:
  - 6 cylinder dual-turbo engine. (runs low power but approoximately doubles output when a lot is needed.)
  - 47 HP motor-generator "pancake" on the engine side of the ttransmission, to scavenge / return power to./from a 1.5 kWhr lithium battery.
  - 10-speed automatic transmission, working with the lithium battery;s main alternator to fine-tune match the engine/mogen to the current driving situation. Max power of engine plus hybrid mogen; 430 hp.
  - full four wheel drive.

So it's primarily a gas-engine power train with an electric-car motor mechanically coupled to the engine shaft. Many other hybrids, from the venerable prius onward, are similar, with plug-in variants having a big scavaging/peaking battery good for pure electric operation of tens of miles rather than a minute or so and a wall-powered charger added.

What I'm looking for is essentially a pure electric - totally electronic "transmission" consisting of alternator(s) between the batteries and the motor(s), plus a tiny engine-generator able to burn gas and feed some teens of KW of charging power into the batteries when running down the road or parked near it.
 

Comment cobalt chemistry, not so nice. (Score 1) 115

Do the Waymo batteries use one of the lithium chemistries including cobalt, or a non-cobalt chemistry such as lithium iron phosphate?

Cobalt chemistries have a higher power/weight and energy/weight ratio, which made them the go-to chemistries for vehicle batteries. But they also produce oxygen when the cells overheat, leading to an unextinguishable runaway fire hazard: A burning cell makes enough heat to ignite the adjacent cells, so the whole assembly of them goes. Bad enough when it's a car's worth, but a disaster if it's a shipping-container sized module of a utility energy storage site. (And even worse when the site is a building full of racks, which someone had "protected" from fire with water-spraying, equipment-shorting system, so the whole site burns up, as happened recently with one in California creating a toxic mess.)

That's why purpose-built stationary lithium energy systems use non-cobalt chemistries - heavier, but a shorted cell just kills itself without getting hot enough to light off its neighbors.

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