s_tec

8 ms·

1.
by s_tec 27d ago
Probably the pole, footing, and wages for the installation crew.
2.
by s_tec 3mo ago
It seems to be a general principle: If AI is better than you at something, you use it. If AI is worse than you, you don't. Each time the frontier models get better, I see another wave of AI doubters suddenly become believers. People sa
3.
by s_tec 7mo ago
Location: San Diego, CA, USA Remote: Hybrid preferred Willing to relocate: No Technologies: Electronic design (KiCad, Verilog, SPICE), Embedded Linux (U-Boot, Yocto, Kernel drivers), Full-stack web (TypeScript, React, CouchDB, PostgreSQL, R
4.
by s_tec 7mo ago
Nifty! I recently bought a RISC-V VisionFive 2 Lite SBC, which required a lot of mucking with firmware and talking to the U-Boot serial console before it would boot Linux for the first time. A tool like this would have been super-handy duri
5.
by s_tec 1y ago
This is more of a compressed-air battery than a sand battery, except that the "air" is CO2 and it's "compressed" enough to cause a phase change. Heat-based energy storage is always going to be inefficient, since it&
6.
by s_tec 1y ago
Thermoelectric cooling is pretty inefficient, because the materials need to balance competing requirements: - Good thermal insulator - Good electrical conductor - Good semiconductor This is because the hot & cold sides are sandwiched cl
7.
by s_tec 1y ago
I'm not an expert, but my understanding is that silicon really loves to be with lithium, which makes it a really energy-dense anode material for batteries. It's also cheap and abundant. The problem is that absorbing lithium causes
8.
by s_tec 1y ago
This isn't the charging circuit - that goes in the charger. This circuit is responsible monitoring the state-of-charge (for that little LED bar graph on the front), disconnecting the cells if something goes wrong, and negotiating avail
9.
by s_tec 2y ago
This is an excellent idea! It would probably make the most sense to perform these adjustments on April 1.
10.
by s_tec 2y ago
I assumed the post title meant nanometers. Why? Floating-point rounding bugs. A nanometer is about 9e-15 degrees of latitude, which is right about where a double-precision floating point number runs out of digits. So, if a piece of software
11.
by s_tec 2y ago
React Native added auto-linking years ago, which solved the native dependency problems. Just `yarn add` whatever you need, and if it has native code, the the Android side will incorporate it on the next build. On the iOS side, you do have t
12.
by s_tec 2y ago
Each OS process has its own virtual address space, which is why one process cannot read another's memory. The CPU implements these address spaces in hardware, since literally every memory read or write needs to have its address transla
13.
by s_tec 3y ago
Just because some people do bad things does not mean you get to paint the whole group with those crimes. Imagine if you had said, "Black people are criminals, because a black person robbed the liquor store down the street last week.&
14.
by s_tec 3y ago
Nah. When I am taking a road trip, the last thing I want to do register an account for some random charging network I'm never going to use again (because I'm in a different part of the world). I just want to pay for my power and m
15.
by s_tec 3y ago
I recently build my own a level 2 EV charger from an OpenEVSE kit. The heart of the charger is a big mechanical relay, which connects and disconnects the charging cable based on whether a car is connected. To control the relay, there is a s
16.
by s_tec 3y ago
Please explain. I keep hearing this meme, but the arguments don't make sense. For instance, people will say things like, "New World Order wants us all to use electric vehicles so they can limit our movement!" This is backward
17.
by s_tec 3y ago
This seems like a good idea. We have used gas taxes for a long time, but electric cars don't pay this tax. If we want to pay for roads based on how much people use them, we will need to switch to something other than gas taxes. Odomete
18.
by s_tec 3y ago
The National Electrical Code contains the rules for this sort of thing, plus whatever extra rules your local jurisdiction adds. I bought a copy of the code itself plus an "Illustrated Guide to the National Electrical Code" to lear
19.
by s_tec 3y ago
I installed the solar first, which cost about $10k for parts, plans, and permits. I got quotes between $18k - $26k for the same-sized system professionally installed, so this was a great savings for 3-4 weekends of physical effort. I don&#x
20.
by s_tec 3y ago
I like the distributed architecture. Each solar panel has its own inverter, as well as each battery. If I want more panels or batteries, I just add them in parallel with the existing panels or batteries. If a panel or battery goes down, the
21.
by s_tec 3y ago
I recently installed an Enphase home backup system as a DIY project (crazy, I know). The biggest problem with any home-backup system is moving the loads onto their own sub-panel. When the utility goes down, power needs to flow into the home
22.
by s_tec 4y ago
Well, that just makes it worse! OP strongly implies that there is no good variable-speed solution, but if the industry already has an assortment of products, what exactly are they even selling?!
23.
by s_tec 4y ago
Normal wiring is terrible, though, since it only supports turning the equipment on & off. If you have a variable-speed fan and variable-speed pumps, it would be nice for the thermostat to throttle those based on the load, but it can&#x2
24.
by s_tec 4y ago
I feel like this is an obvious idea, but we simply haven't had the 3D printing technology to make things like this before. Casting this using traditional methods would be extremely difficult. Nobody bothered making stuff like this, not
25.
by s_tec 4y ago
The main reason to keep hydrocarbon fuels in a green-energy future is for their energy density. Rockets and airplanes will always want the best density and weight available, and that’s hydrocarbon fuel for now, barring some order-of-magnitu
26.
by s_tec 4y ago
The same thing occurs with Web standards. If some old IE version did things a certain way, even the most modern browser will want to do things in a similar way to remain compatible. Therefore, the standards bodies will try to reverse-engine
27.
by s_tec 4y ago
That would be a Mebimeter, according to SI. Whether or not this sounds silly is another issue.
28.
by s_tec 4y ago
I'm not the OP, but I'll bite. For many species, males have a higher standard deviation across a variety factors. There are biological reasons for this, since males are more disposable than females for reproduction. Think of one r
29.
by s_tec 5y ago
The tangle fails to to the one thing a blockchain needs to do - prevent double-spends. Rather than give up their failed experiment once they realized it didn't work, the IOTA project instead set up centralized "coordinator" n
30.
by s_tec 5y ago
If your team has invested a lot of time & energy into mastering the Javascript ecosystem (including things like Typescript), it makes sense to use the same language on the server side as well. Server machines are cheaper than good devel

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