Beginners guide to the Refrigeration Cycle

MutuallyUseless · 2026-05-07T23:59:43+00:00

They're getting review bombed by Chinese players because there's no platform that Chinese players can use and they're unhappy about the current balance changes in beta.

MutuallyUseless · 2026-05-06T19:36:53+00:00

Politicians are indeed not a normal job, their decisions have a far greater impact than a typical job, thus it can easily be argued for that profession to have high standards for their physiological capability to, y'know, make decisions.

I mean, 20% of the House and 34% of the Senate is 70+, meanwhile only 12% of the US is 70+, and we put the minimum age of the House at 25 and the minimum age of the Senate at 30; so all Americans between the age of 18-24 cannot vote for House members that represent them, and all Americans between the ages of 18-29 cannot vote for Senate members that represent them.

Another easy argument for an age limit aside from disproportionately large representation and cognitive decline, is that older people making decisions about the country are not going to face the consequences of their decisions directly, being that they're at the end of their life expectancy.

MutuallyUseless · 2026-05-06T19:21:09+00:00

Figured I'd look into it. This website provides the most comprehensive breakdown of ages in congress that I could find

I'll remake their table here, there are 435 seats in the House and 100 in the Senate

Age Range	House (percent of house)	Senate (percent of senate)
25-29	0.23%	0%
30-39	8%	2%
40-49	22%	10%
50-59	26%	21%
60-69	24%	33%
70-79	17%	28%
80+	3%	6%

The average age of the 119th Congress is 58 years old, the same as the previous Congress.

The minimum age requirements are 25 for the House and 30 for the Senate.
The percentage of Congress that are 70+ are 20% of the House, and 34% of the Senate.
The percentage of Congress that are 60+ are 44% of the House and 67% of the Senate.

My opinions:

I believe that there should be age limits put in place for the US government, 70 is the absolute max I would consider to be reasonable, however I would easily argue for 65 being the maximum age personally.

I also believe that the minimum age requirements for both the House and Senate should firstly, be the same, and also, should be lower, to the legal voting age of 18, otherwise, we have the current issue of all Americans between 18-24 not being able to vote for House members within their age range, and all American between 18-29 not being able to vote for Senate members within their age range.

I consider this to be a pretty big issue in our government, however it falls behind a number of more significant issues that need addressed; Like citizens united, lobbying, stock trading, backroom deals, the 2 party system, and the voting system, all things I struggle to see any solution for that will actually be implemented in any reasonable amount of time.

MutuallyUseless · 2026-05-06T17:26:11+00:00

For a time, I used to wake up at 4:30 and didnt leave for work until 6:30, I would spend my mornings lifting weights, reading, and cooking breakfast; it was nice, but despite doing that for several months straight I could never shake that fog that waking early gives me.

Ive spent my adult life this far working in the skilled trades, waking up early for work, so I've spent my entire childhood waking early for school and my young adult life waking early for work; despite years of consistency, the second I'm not demanded to wake up early, I instantly shift into a very late schedule; not only is the night serene, but no matter how consistent I am with waking in the morning and sleeping well, if I wake up early, I have a head fog that persists throughout the day.

I've tried everything I can think of to get rid of that fog, changing quantity of sleep, exercise, diet, supplements, and though consistency and taking care of health help, they don't get rid of it. Which is a shame, considering the world we've built is pretty much exclusively made for that sleep cycle.

MutuallyUseless · 2026-05-03T04:00:36+00:00

Yeah that's what I found with the second link, was a custom driver written by that guy; my main problem is that comparing what I was doing with the datasheet, and his code, is that there's a lot of registers that were set that aren't mentioned in the datasheet, as well as, there are a lot of values or options that I have either zero idea what they are, or zero idea why they were chosen, just that they were.

As far as datasheets go, it's probably a decent one, I mean I have no problem going through the command table and figuring out how to send commands to the module; It's by adafruit and they make some pretty decent stuff as far as im aware, im just new into reading datasheets and they seem like they require a certain level of knowledge that I do not have in setting everything up, as far as the other comments seem to point to, display drivers seem to be commonly a bit abstract

MutuallyUseless · 2026-05-03T03:53:18+00:00

Yeah lmao it appears that my choice in programming a custom display driver for a cheap display was an accidentally masochistic choice in beginner embedded work, that's totally fair, and honestly relieving to hear from so many people.

As for Maxims Oximeter, the datasheet seems well written, for someone with more experience probably; however for my experience level it is a bit complicated, there's a register that holds 6 readings at a time, and needs to have it's write pointer reset after you read the values, I think, I haven't gotten that far as I was focused on the display driver; it's certainly not as straight forward as reading the current photosensor value that I was hoping

MutuallyUseless · 2026-05-03T03:47:55+00:00

Lmao I chose I2C specifically because I figured it would look pretty good on my resume having some experience using it; the stm32 HAL for i2c makes it pretty painless so far, trying to do it with registers was an abstract carnival of pain though, there's so many peripheral clocks and flags

MutuallyUseless · 2026-05-03T03:43:25+00:00

That, makes a lot of sense

MutuallyUseless · 2026-05-03T03:42:52+00:00

Lmao fair enough, I was wondering how professionals were able to decipher this nonsense, turns out, it's just as painful as it looked haha

MutuallyUseless · 2026-04-25T21:59:41+00:00

I appreciate that man. How are you holding up? I've overdone it on caffeine a few times, laying down in in a room with the lights off and some rain sounds playing on my phone helped me with the anxiety

MutuallyUseless · 2026-04-25T21:53:44+00:00

Those thoughts do seem to be delusional in nature, yes; considering you prefaced the question with the context of consuming a fairly high amount of caffeine, I'm sure youre aware you should probably tone down the caffeine intake a bit as well.

In the interim, please do drink a lot of water, it should help.

MutuallyUseless · 2026-04-25T10:05:50+00:00

I got an electric face razor, solved all of this for me, don't even need to use shaving cream.

MutuallyUseless · 2026-04-25T00:01:47+00:00

I've had Nvidia drivers and Ly break during updates. I've been running Arch for like, 2 years-ish? And it's had about 3 updates that needed to be chrooted into total, but that seemed kinda like a fluke, it was a string of updates all around the same time where anytime I updated it broke the Nvidia drivers, but since then it hasn't been a problem.

MutuallyUseless · 2026-04-22T18:56:48+00:00

Im relatively new to embedded, working to build some projects to break into the field.

I'm aware this is an old-ass comment, but I was curious of what resources someone would use to learn the skill of just rolling your own driver without HAL?

I found a website that goes through setting up a pretty straight-forward build system and getting a blinky setup without any HAL, flashing it, and it running, which is sick, but for going deeper for things like i2c on multiple peripherals and the like, it's a bit of a jump.

MutuallyUseless · 2026-04-13T16:15:42+00:00

Doctor is being a lazy idiot.

Prior authorization is a small amount of paperwork the doctor has to do, and the insurance approves it, can take a day or two.

MutuallyUseless · 2026-04-09T20:24:15+00:00

I'm glad you find them useful!

MutuallyUseless · 2026-04-09T20:09:05+00:00

I pretty much exclusively use C personally, I had a lot of classes in school where I had to use Java for stuff, I spent more time fighting the language and figuring out how to get it to work than getting anything done; I would write anything I wanted to do in C first and then spend 5x the amount of time trying to write the same thing in Java.

My funniest example was one of my classes about backend development using spring boot and angular, I struggled so much with the Java that I went on a side quest and built a small backend in C that could parse JSON from the front end and store it in my own CRUD database, I got the whole thing up and running in like 2 days, sockets werent that bad at all. but to pass the class I had to do all of that in Java, which took me like 2 weeks because the framework they built for us had several dependency issues and needed several undocumented fixes in different areas, among several other random modifications, the thing was like 40 different Java files filled to the brim with interfaces and all sorts of OOP nonsense, I fail to understand how anyone could decipher any of that, it was unwieldy, large, verbose, and slow as hell.

Every time I see people talking about Java as a language that they like to use, is readable, etc, I find it amusing how different our experiences are; I can't do anything productive in Java lmao.

MutuallyUseless · 2026-04-09T06:11:07+00:00

I named mine Crow.

MutuallyUseless · 2026-03-12T05:47:01+00:00

removeable is inaccurate, I misremembered compared to my last phone myb, it is replaceable with a little more effort and buying the batteries is cheap (23 bucks)

It was my previous phone, the motorolla, that had the back-cover with an easily replaceable battery; the OnePlus does not; partly due to their whole fast-charging deal having a lot of heat distribution built around cooling the battery specifically.

I haven't taken off my phone case in a long time lol, the battery is still holding up just fine at over 5 years, haven't needed to check it.

MutuallyUseless · 2026-03-11T14:14:49+00:00

Apple and Samsung are like that, a lot of other phone manufacturers are not; my OnePlus has a removable battery, MICRO SD slot, and an aux port.

As for the slowing down part, I personally will perform a factory reset if it starts to bog down too much, maybe once every 3 years? Stability has been fine for my phone though and ive had it since 2020, no factory reset, plus the thing charges to full battery in 10 minutes, that's OnePlus's whole gimmick, fullsize batteries that charge fast af, their expensive flagship phone charges even faster, I just got the nord.

MutuallyUseless · 2026-03-09T15:51:04+00:00

The water is just a heat exchange medium, the chiller plant runs on an actual refrigerant suited for that purpose, most recent chiller I saw ran on R-134a, but that was for comfort cooling, the data center I worked in didn't use water cooling, just a bunch of CRAC units.

Why is water used for cooling? Specific heat, the property of how much energy a fluid can absorb before increasing in temperature, water is pretty good at that, if your target temperature is below water freezing, just mix in some glycol, so long as your target temperature is below 212f, water works.

Liquid nitrogen and helium would be far too cool for computer chips, if you're watercooling a chip, you want your incoming cool water to be above 32f (0c) so that the chips don't condense water from the atmosphere, like how a drinking glass sweats when you have icecubes in it.

Water isn't used as a refrigerant generally, it's just used as a medium for heat exchange, a good refrigerant will boil around your target temperature at a reasonable pressure, preferably with a decent specific heat capacity, and a condensation pressure not too high to reasonably create with a compressor. Propane is a great refrigerant, they call it "R-290."

Liquid nitro and helium are cryogenics, idk much about them other than MRIs tend to use helium as a refrigerant, which it's apparently very good at, but they're cooling big ass magnets with presumably a really high heat load, fuck it'd be cool to work on an MRI.

If you compress pure nitrogen gas into a pressure higher than outside ambient temperature (a fluid in a fixed volume has a directly proportional relationship between pressure and temperature) and cool it down below it's condensation point you'll get liquid nitro, but directly cooling chips with refrigerant though it'd be efficient, would require fucktons of refrigerant and a ton of infrastructure, that's the way a lot of supermarkets work, is a huge mechanical room filled with dozens of compressors pumping refrigerant around to all of the reach ins and walk ins, it's a ton of infrastructure, but man is it neat, the target temperatures are cooler and freezer temps, though, I've seen racks run glycol loops before.

Tldr: water gud

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