ThePyroPython
@ThePyroPython@lemmy.world
- Comment on LinkedIn’s cofounder Reid Hoffman says seeking work-life balance is a red flag that you’re ‘not committed to winning’ 2 days ago:
His line going up.
- Comment on Today's Survey. One point for everything that you have NEVER DONE 6 days ago:
- Comment on Virgin Physicists 1 week ago:
Mathematically yes. Practically, right now? No.
So you need a resistor of this value for your widget.
For that many places of precision you’re looking at a potentiometer with a 10 nano-ohm precision.
I am not aware of any commercially available resistor that can do that but you could create one using microelectronic structures used for ICs and derive a 10 nano-ohm resistor by design and then chain enough of these elements into a resistor network or potentiometer to create the super precise resistance value you want.
Cool, congratulations.
Now how are you going to use this 10 nano-ohm resistor? What voltage will you be applying across it? What current do you expect it to handle? And therefore what are your power requirements? What are your tolerances, how much can the true value deviate from the designed ideal?
Because power generates heat through losses, and that will affect the resistance value so how tightly do you need to manage the power dissipation?
How will you connect to this resistor to other circuit components? Because a super precise resistor on it’s own is nothing but an over-engineered heating element.
If you tried connecting other surface mount devices (SMDs) from the E24 or even E96 series to this super precise resistor then the several orders of magnitude wider tolerances of these other components alone will swallow any of the precision from your super accurate resistor.
So now your entire circuit has to be made to the same precision else all of your design work has been wasted.
Speaking of which, now your heat management solution now needs to be super precise as well and before you know it you’ve built the world’s most accurate widget that probably took billions of dollars/euros/schmeckles and collaboration from the worlds leading engineers and scientists that probably cost more time and money than the Large Hadron Collider.
- Comment on What's the problem sweetie? You've barely touched your eggsicle 1 week ago:
Untap artifact everytime the current US administration doorsteps a country for eggs.
- Comment on When fighter jets are scrambled to intercept a plane for security reasons, what can they actually do? 5 weeks ago:
I can only speak for the UK and from a amateur perspective but here’s the rough breakdown:
90% of the time it’s likely a private pilot that’s wandered into a restricted airspace without realising it. They’re politely escorted out.
9.9999% of the time is an adversarial nation testing the response time of the quick-reaction force defenses. They’re politely but forcefully escorted out. Maybe some insults traded over the radio but that’d be about as heated as it gets.
0.0001% they pose a threat and refuse to be escorted out. At that point it’s basically the same thing of asking “what would happen if someone climbed the fence to the White House and towards it and when the secret service pointed guns at them didn’t stop, would they get shot?”
It’s the pilot’s call at that point, but if they posed a threat to life then yes they probably would shoot them down.
- Comment on Amazon Restricted Vaginal Health Products for Being ‘Potentially Embarrassing’ 5 weeks ago:
- Comment on Amazon Restricted Vaginal Health Products for Being ‘Potentially Embarrassing’ 5 weeks ago:
Christ, I wish Americans would get over their embarrassment that half theirs population has a vagina.
- Comment on [deleted] 1 month ago:
First of all, welcome to the collective of silicon wizards (a.k.a electronics engineers) your robe and hat are being dispatched as we speak.
Second, well done for attempting a new skill most are too afraid to even consider.
Third, all of the advice offered here about flux and tinning the wire ends is sound. So I’ll offer some other advice, check what temperature you set the soldering iron to. It might be too low. I prefer putting my temp at 350 degC. Others will argue for a slightly different temperature.
If your answer is “but I don’t know what temperature my soldering iron is at” then you ought to get one with a temperature control. I won’t recommend a particular brand or price point because you should only spend what you can afford on a hobby. But there’s plenty of articles and opinions (be careful about some of those being the same) about which brands are good quality at different price points.
Also, two additional things to think about getting:
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A basic as fuck desktop extractor fan that has a carbon filter. This will be for the flux fumes.
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Some form of overhead lighting and magnification. These can be separate but you can get magnifying lamps. This will help when you start venturing into the world of surface mount components.
Good luck and we’re looking forward to seeing your future creations 😊
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- Comment on Italy to require VPN and DNS providers to block pirated content 1 month ago:
Because they don’t fight back unlike the billionaires who threaten to take jobs away / donate to their political rivals, the criminals who blackmail or threaten bodily harm (since this is Italy we’re taking about), and the individuals who fall into both categories.
- Comment on nuked from orbit 1 month ago:
No… Let 'em burn.
I want Brad so emotionally scarred that every time he goes to tweet some bullshit he has a depression inducing anxiety attack that he has to find the nearest corner to go cry in until exhaustion.
- Comment on France runs fusion reactor for record 22 minutes 1 month ago:
la puissance du soleil dans la paume de ma main
Honhonhon
[Takes a drag on a sexy cigarette]
- Comment on "Me Ug! Ug feel ACADEMIC!" 1 month ago:
As an R&D engineer I feel both seen and offended by this meme. Excellent work, am I ok to cite this meme in IEEE format?
- Comment on EU consumers don’t trust US goods: a look into Trump’s trade deficit claims 1 month ago:
Yeah even though I’m in the UK I will never eat US chicken. The reason they wash their chicken and eggs is because Salmonella is endemic to US poultry because their standards are so lax they’d rather chemical their chicken than fix the problem. 🤮
- Comment on Romantic 1 month ago:
I see some of you have never played Battleshits before.
Rules are as follows:
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Two people enter a toilet cubicle each and proceed to try and shit.
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The first one to shit wins.
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If both players have shitted then the size of the shits is judged and the largest shit wins.
It is a puerile and crass game of speed, deception and defiantly not for the weak-stomached as I found out to my own detriment as a spectator.
This has been your daily reminder that we are all just slightly more evolved apes with access to the power of gods.
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- Comment on Driver caught doing 122mph on 30mph road as UK’s shocking speed records revealed 1 month ago:
Lifetime driving ban.
- Comment on US and UK refuse to sign AI safety declaration at summit 1 month ago:
Sadly it is in one respect only: financial services.
And that’s the only reason why they’re interested; so the City (of London, not Greater London) has more freedom to invest into these AI start-ups and get their big payout when they grow large enough to move head office to the US.
- Comment on What job do you need this hard hat for? 1 month ago:
Unfortunately these buffs don’t stack. And the effect only works when constructing large enough engineering feats where people have to look straight up to see the whole thing.
- Comment on Driver stopped in Tesla Cybertruck banned in UK 2 months ago:
So that’s why Musk is sticking his oar in UK politics. Wind your neck in you weirdo, you’re giving actual engineers a bad rep.
- Comment on When they tell you "oh of course it's safe" they are lying 2 months ago:
Can u get preganté?
- Comment on Choosing pink is chaotic evil? 2 months ago:
Allow me to introduce my little friend: Transmetropolitan Bowl Disruptor
- Comment on Lower Decks Eulogizing 3 months ago:
Lower Decks! Lower Decks!
- Comment on Thames Water boss defends bonuses as sewage spills soar 3 months ago:
Fucking ridiculous.
Jail that fucking boss and board of directors, let Thames Water fail, and bring it back into public ownership. Then, just to prove a point, throw them into stocks and dump Thames Water sewage onto them.
- Comment on circuits 4 months ago:
The post-grad assistant helping me with that assignment night before it’s due:
“Oh that’s easy, just apply Kirchoff’s Gambit. Here’s the solution because the lecturer hasn’t changed the assignment questions since they started here 20 years ago.”
Me, wide eyed: “You are an angel amongst demons!”
- Comment on circuits 4 months ago:
How the university lectures go:
“Here’s a design theory, here’s another, and another, and another. Be sure to master these techniques for the exam, because they’ll be with you for the rest of your career.”
How the industry design practice goes talking with the senior electronics design engineer:
“Whilst I was high/drunk/sleep deprived from insomnia/all three at the same time, I drew up this circuit schematic last night and finished at 6am then got into the office for 8.
The calculations for these resistor and capacitance values? Idk, they just feel like the right values based on what I read in the data sheet. If they’re wrong who cares, we’ll stack SMDs on top or just respin the boards because PCBs and passives are cheap and we’ll (read: you’ll) desolder and reuse the more expensive ICs.
My design justifications notes? Haha that’s your job, silly junior engineer. Oh by the way, I’ll make value changes to 80% of these components fixing my mistakes, also known as ‘tuning the sensor circuits’, before I update the schematic. Even after it goes into production I’ll just pinch boards off the line and change some things in the BoM without writing an ECO because I don’t have time for that.
Yes I do still prefer to use leaded solder without an extractor fan, why do you ask?”
That engineer will either be the most liked person in the company or the most hated person in the company, yet either way are clearly un-fireable.
- Comment on circuits 4 months ago:
My circuit design lecturer: “If you dig down deep enough into the theory, every component from resistors to microprocessors are analogue and complex.”
Me: (internal screaming intensifies)
My plug: “Here, smoke this doob.”
Me: (inhales deeply) It all makes sense now.
- Comment on Frog's Gift 4 months ago:
Elon Musk: now singlehandedly responsible for the US falling further behind China in innovation and research (for the record, fuck the CCP).
I seriously hope the UK takes advantage and offers visas and funding for the research. We’ve already got a good research sector though it took a hit from Brexit. Taking in these US scientists, even if it’s only for four years, would accelerate the UK’s growth, suck it Yanks!
p.s. also the EU would love to have them as well.
- Comment on Marine Scientists 4 months ago:
[History Channel Gesture]
Rare Earth Nodules
- Comment on But yes. 4 months ago:
That moment when you take a drag of your Blue Raspberry vape and the dosimeter next to you maxes out.
- Comment on But yes. 4 months ago:
Taste: slightly metallic, not great, not terrible.
- Comment on But yes. 4 months ago:
So a nucler reactor is just a kettle with an extra spicy heating element?
