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Cake day: June 15th, 2023

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  • I’m a few months late, but I actually recommend people try to solder these at home at a hobbyist.

    Below a certain size, you rely upon surface tension of the solder to “pull” the components into place. Its a combination of solder-mask (by your PCB-manufacturer) + well calibrated PCB Software + proper heating technique (hotplate and/or oven).

    You’ll be surprised how “far” lead will pull your components into the correct spot. In fact, the force is so powerful that smaller components can tombstone if one side melts before the other side (ex: cold joint due to more copper pour melts slightly after, causing the “hot” side to YANK the component so hard it “flips up”).


    VQFN packages are “square” though, so its unlikely for them to tombstone.






  • Green Squadron (stealth / intelligence experts at finding monsters) failing to recognize a monster?

    Remember that Suzukiri / Yellow Jr. Rank1 instantly recognized Fighter D in Ep. 1. And she’s of the “tech” squadron. Its clear that those in the Jr. Rank 1 slots are absurdly intelligent and competent (except for Red Jr. Rank1, lol). Then again, Suzukiri is fighting well above her weight class, something crazy is going on with her…


    Occam’s Razor is that Green Squadron recognized that Fighter D is actually reasonably competent at stealth / subterfuge and decided that Green Squadron was the best place for him.


  • I saw it in theaters. It feels… mean. I know we’re well into the “evil” arc of Overlord so its well into “evil Overlord conquers the world” kinda thing.

    There is still a lot of good Overlord humor and laughs though. So the occasional “comic relief” to the rather heavy tragedies that Ains is now inflicting upon this country. But as the acts get “more evil”, its harder to laugh at the comedy IMO.


    Ultimately, it feels like a sidequest. I can see why this was cut out of the season and into its own movie. It feels like an OVA. Yes, they finally “called in” that Jaldabaoth card that’s been sitting around since S2. So its good to see how that particular story is finally completed and how Ains (or really Demiurge) decides to use that card. But its a new country not covered before and doesn’t seem like anything they were building towards in the great scheme of things.





  • in series

    In parallel. Remember that the parasitic resistance (and inductance) are the major issues.

    Capacitance adds in parallel. Resistances / inductances half in parallel. So by putting in parallel the capacitance grows while resistance/inductance shrinks.

    2x1uF electrolytic (or any type) capacitors basically in series next to the power source of a chip, does that increase reliability or is there little reward for it?

    “It Depends”. For full details, seek a masters degree in power-electronics, PCB design, power delivery networks, and other advanced subjects.

    You’re kinda-sorta on the right track but your understanding of the magnitudes at play here are way off.

    https://www.we-online.com/components/products/datasheet/860020672005.pdf

    This 1uF aluminum electrolytic capacitor from Wurth Electronics is measured to be 39.553 Ohms. With 2x of this capacitor in parallel you’ll have ~20Ohms (halved) and 2uF of capacitance. (parallel halves the resistance and doubles the capacitance). The 20% to 80% rise-time of RC-circuits can be calculated with just 1.4 * RC constant. This means your two-capacitor team “reacts” within 56 microseconds.

    Meanwhile, the 1uF GRT033R60G105ME13 Murata 0201 (American) MLCC / Ceramic capacitor, commonly used for this task, has 0.01 ohms of resistance, roughly a THOUSAND-times less resistance than the Aluminum / Electrolytic capacitor. This capacitor “reacts” to the changing conditions within 0.014 microseconds (aka: 14 nanoseconds).

    Do you see the difference? The name of the game is to get:

    1. Enough capacitance to deal with the problem.

    2. After that, minimize resistance as low as possible (and inductance for the “worst” cases, like those 300W GPU we shove into computers), so that the capacitor can actually “react” in time.

    Once you “have enough capacitance” (and for most chips, that is 100nF), the way you speed up capacitors is buying low-resistance capacitors. And aluminum is among the slowest / biggest resistance capacitors in the entire market. So they’re a bad choice.


    To have your aluminum capacitor team “work” at the same speeds as a ceramic capacitor, you’ll need something like 2000 of them in parallel. Except at that point, you’ll have a lot of other issues with your circuit (see leakage problems, soft-start / load dumps, etc. etc.). Its just the resistance game, Aluminum Electrolytic just fundamentally has too much resistance for this particular job.

    Now Aluminum is great for other jobs and other situations. But a big part of your electronics studies from now on is going to be passives (differences between capacitor chemistries, and so forth). No part works like in your textbook. The different chemistries have different reactions at different temperatures, different voltages, different frequencies, different use-cases and more. Its incredibly complicated.

    So yeah, seek a Masters-degree for more details. Hopefully this gives you an idea of what one aspect is going through my brain with the above questions.


  • Would there be any problem if I use an electrolytic capacitor instead of a ceramic one?

    Electrolytics have much, much larger parasitic resistances. Or under more layman terms: Electrolytics are always “slower” than ceramic capacitors. However, you’re using a Arduino Leonardo, which as a 1uF ceramic capacitor across VCC / 5V and GND. You “might” get lucky and the capacitor there will save you. Its very far away and might not work though.

    Capacitors are basically considered the most important and numerous component on modern electronics. You should basically spam them to increase your reliability. They’re a lucky-charm, many “mysterious” issues get solved with more capacitors, lol. Well, at least at the beginner levels.

    Lots of 100nF capacitors (not too small, not too big) help out the majority of designs. Of course, an expert would run real power models and simulate the results. But a beginner should instead just place a 100nF capacitor next to every VCC-pin of every chip you use. Seriously.



  • dragontamer@lemmy.worldtoWork Reform@lemmy.worldunnecessary expense
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    14 days ago

    Ah yeah the standard low effort copypasta canned arguments.

    Go learn to write more than a copy/paste and try to understand topics moving forward yo. Pretending to be an uncaring sociopath online is like Twitter / X shit. This is Lemmy, I presume you are here because you actually give a shit about these discussions.


  • dragontamer@lemmy.worldtoWork Reform@lemmy.worldunnecessary expense
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    14 days ago

    Lulz. If you can’t spar with me, you will get eaten up by the actual far right / mainstream Americans out there.

    Be happy I’m willing to come over here and push back against your bubble. You guys obviously need it if you’re upvoting shitty misinformation memes like this.


    The best part of this entire discussion? Elon Musk is part of the $1/year salary club. Your entire fucking meme doesn’t even apply to the most corrupt of CEOs.

    Your argument sucks and you should make a new one. Sorry I’m the bearer of bad news but that’s better than y’all idiots going out to the real world and having a far right goon own you in a debate.


  • dragontamer@lemmy.worldtoWork Reform@lemmy.worldunnecessary expense
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    14 days ago

    The board of directors removes the obvious corruption argument.

    And shareholders select the board of directors anyway, so if shareholders agree to new terms of values then CEOs can and will be fired.

    I’m looking at Intel for example and how they mistreated Pat Gelsinger and fired him despite being a technical leader. And the new incoming CEO is Lip-Bu Tan, who is a non-technical finance bro who is worse. Why did the shareholders (and board of directors) prefer Lip-Bu Tan?

    There is a large scale hero worship bro culture that’s at the root of all the problems here, a culture that millions of shareholders have which is then passed to the Board of Directors and finally the C-suite that the Board hires.

    But no. Let make shitty memes that misunderstand the power dynamics and perpetuates misinformation. That will help your argument lol.


    EDIT and that doesn’t even get to say, all the CEOs who take a $1/year paycheck just to prove you wrong. The problem here is hero worship cult culture. The pay and salaries are a distraction and easily avoided with various simple political / Public Relations moves.


  • dragontamer@lemmy.worldtoWork Reform@lemmy.worldunnecessary expense
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    14 days ago

    Because today’s hero worship culture makes the mass of shareholders believe that these CEOs have skills that cannot be replicated by cheaper labor.

    But that’s not quite as simple a problem. The issue is that you are up against literally millions of shareholders who have different values than you.

    Go talk to a Tesla shareholder. They pretty much think Elon is a god. So no amount of salary is too much as long as they get Elon leading those companies. (But Elon also only takes a $1/year salary anyway to prove how awesome he is, so this entire discussion train is immediately derailed if you actually start trying to apply it in practice).

    This entire meme just fundamentally misses the entire fucking problem and is nothing more than a distraction.


  • dragontamer@lemmy.worldtoWork Reform@lemmy.worldunnecessary expense
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    14 days ago

    Exactly, except in reverse.

    If you want to attract the talent of someone who has networth in the millions+++, you need to pay them more.

    The form of your argument and where you are going with the discussion is very short sighted. This isn’t a path to any actual winning argument. I suggest you start elsewhere.

    This is the problem with shitty memes. They poison your brain and make you dumb. If you actually want to make a reasonable argument throw this topic away and start anew.

    It’s not you who is wrong. It’s this meme. It’s just a terrible starting place for discussion and is innately to your disadvantage.