reportingsjr

Not true in most of the US, you do need to get engineered drawings, permits, etc which can be challenging for the average person.

As mentioned, it handles large temperature swings better than the more common soda lime glass. This can be useful if you have say a casserole in a glass dish that you prepped and stored in the fridge or freezer. When you go to bake it, if you have a borosilicate dish, you can take it out and put it straight in the oven. Soda lime glass has a much higher chance of shattering if you do this.

The downside of borosilicate that no one seems to mention is that it is a good bit more fragile when it comes to mechanical shocks. So, if you accidentally hit it with something while it's in the sink, there is a much higher chance that it shatters there.

RFID can still use batteries (called active vs passive RFID) for what it's worth.

Active RFID tags with integrated sensors are becoming more common.

Electronic sensors of various sorts have become low enough power to enable embedding a very small battery with sensors and RFID transmitter. These can log readings every second or few for a few _years_.

Certain things get a lot more complicated when you go from AC to DC. Two of the most significant issues for home use are connects that can be disconnected under load (arcing is a serious issue here) and turning DC power on/off with mechanical switches (arcing is also the issue here).

Industrial DC devices get around these issues with stricter rules and bulkier/more complex devices. E.g. electric cars use contactors to connect batteries rather than a simpler relay/switch.

This has absolutely nothing to do with material build up and drought conditions that exacerbate extreme forest fires.

What you linked is weird propaganda about Finnish forestry companies trying to utilize clear cut areas more effectively.

I've had major issues with the couple USB hubs I have purchased from them.I've totally written off their hubs at this point.

It's been disappointing since their cables, chargers, etc have been pretty good.

Closer to 100x more expensive. 1 cent/sq cm is for very basic cheapo PCBs.

Apple (and most high end tech designers) use highly specialized, very $$$ PCBs for a lot of their products.

They aren't created by traditional litho + etch, but rather by a process called modified semi-additive processing (mSAP). iPhone, apple watch, etc PCBs are basically the same as CPU/IC interposers on a large scale.

Definitely not 1 cent/sq cm cheap, but they have massive volume and high price points. It lets them get the insane part density needed these days.

Dang, can we get an updated title for this submission?

A number of things including some insurance companies refusing to insure kia and hyundais. People wont buy your cars if they can't use them!

I've wished for this product for years.

Steve Mann created a prototype yeeaarrss ago that looks incredible, but no one has taken it to the commercial stage yet: http://wearcam.org/mannventions-password-stefanosmannaz13/ma...

This past summer I visited a cognac distillery, and when in an aging room the same thing was mentioned (also called the angel's share). You can actually tell which buildings hold aging barrels, because you can see this black fungus growing on the outside of those buildings.

There are plenty of things that have firmware, but run it out of RAM. FPGAs do this, and some microcontrollers. Dialog, now Renasas, has microcontrollers that run their firmware out of RAM.

Commonly there is a hardware peripheral that pulls the firmware from a couple of places (could be an onboard ROM, could be jtag, or other) and loads it in to RAM.

I'm 100% certain you are mixing up poison oak and poison ivy. People do this non stop here in the midwest, but in the reverse of what you're doing funny enough.

Check this page out for a map of known ranges of each species: https://www.poison-ivy.org/poison-ivy-overview

Poison oak, Toxicodendron diversilobum, looks somewhat similar to eastern and western poison ivy (T. radicans and T. rydbergii), but are all different species. Neither poison ivy species really occurs in California.

> I would want LiFePo4 for this application; at current rates, a 10KWh battery runs $10,000.

Where in the heck did you get that number? 10kWh of LiFePO4 batteries is more like $3k at current prices: https://signaturesolar.com/eg4-lifepower4-lithium-battery-48...

Most of the top supercomputers are used to model nuclear weapons, weather and climate, and various sciencey things.

I don't know if the top ones are still used for oil and gas exploration (crunching data to provide higher resolution and higher accuracy oil field maps), but they have been in the past.

> Why should I personally pay for the tools I use at work to make my employer money? Should I also buy my own work laptop? My own software licenses? It doesn't make sense.

Wait til you hear about the amount of tools trades people have to buy for their jobs!

If you're knowingly measuring a 50 ohm resistor with a VNA you're either calibrating it, or need to do more reading about a VNA.

Farmland in the midwest has been shrinking consistently for decades. Your comments would make sense if the opposite of this were true, and there was demand for additional farmland, but there isn't. Ohio reduced the amount of land it needed for farming by about 800,000 acres from 1997-2017 and in that period increase agricultural output[0], so it's not like the amount of food produced is going down!

If people in rural areas NIMBY away solar power in these areas, more than likely the land is just going to have some exurban building plopped down on it.

Also, I don't get the whole thing where people act like farmland is sacred and good for the environment. I like food, I understand the value of farms, but farmland is typically pretty awful for the surrounding environment.

The area I live in Ohio has a whole handful of lakes, and any of them that are surrounded by farmland (and to a certain extent exurbs and suburbs) are incredibly polluted, to the point where you have to look at "forecasts" on ODNR's website to see if the water is healthy to swim in.

0: https://www.nass.usda.gov/Publications/AgCensus/2017/Full_Re... (check table 1 for historical data)

Why would this ever have needed an abbreviation??

No, but installing an maintaining diesel tanks and pumps ain't cheap either! Especially if you have to deal with any environmental destruction caused by spillage or leaking tanks (happens way, way more than most people think).

In the areas that companies build their truck lots with diesel depot's there is typically significant power available. The US electrical grid has expanded at a fairly steady rate. I don't see why it wouldn't be able to handle a continued growth rate via electric trucks.

Just to put some numbers out there, the semi battery pack is probably around 850kWh-1MWh. Imagine if this gets drained every day and a company has 10 trucks, the trucks have roughly 10-12 hours to charge (~6pm to 6am). So you'd need 1MW of electrical capacity.

This is equivalent to about 20 modern US homes (200A*240VAC) and not that crazy in the scheme of things. A medium sized factory in the US probably has a grid connection around this size depending on what they do.

You're talking about battery cells, but you need to look at the battery _pack_ energy density. The model 3 battery pack, which uses the same cells as semi, is about 170Wh/kg. The numbers in TFA are very reasonable estimates.

I have compared it against both the pixel 2 and the pixel 3 xl I previously had. In more urban areas with buildings around it definitely still performs a lot better.

Previously on walks around the neighbourhood gps tracks would just be a general location and bounce around. I can now see pretty regularly which side of the street I was on, street crossings, etc.

When I built my home storage server I made a mistake, and thought I could fit an additional drive, but I ran out of SATA ports. I kept the extra drive as a cold swap and just set up a raidz array.

I ended up freeing up that SATA port I needed, but I'm waiting just a bit longer to expand ZFS on to that last drive so this code can get juuusstt a bit more testing!

My pixel 6 pro has much, much better GPS accuracy than my pixel 3 had.

Here is a comparison between my pixel 6 and my S.O.'s pixel 2, from a hike we did recently: https://imgur.com/a/5VibEUw

This makes it pretty obvious how much the L5 band can improve GPS. These were good conditions in general, but just looking at the bottom right portion alone shows how good L1 + L5 in a phone can get. I'm sure devices with larger antennas (bike computers, larger handheld GPS units, etc) can do even better in worse conditions as well.

I absolutely love sour foods, to the point of drinking straight up lemon juice when I was younger. I eat a granny smith apple probably every other day, and the more sour the better. Yet, my S.O. recoils at the thought of eating granny smiths. I wonder why people have such varied responses when it comes to sour foods.

This is a pretty recent thing, but for a beginner in the VLSI world I'd say this is a good "hello world": https://tinytapeout.com/

This seems to big missing a major option: * Connect your solar to the grid, but also to a local battery. Charge the battery with excess solar until battery is full, then sell/donate excess.

This has really started to become a viable option with solar panel prices being so low and battery prices (particularly lithium iron phosphate) dropping significantly in the last few years.

Unless this isn't a legal method anywhere in the EU, but I highly doubt that.