ThePyroPython
@ThePyroPython@lemmy.world
- Comment on Is this soldered controller repairable by an amateur? 12 hours ago:
Jesus, this isn’t a slight against you OP but as an electronics engineer I feel I need to have a rant about the shoddy design here:
First of all, I have no idea what that component is dangling off the burnt-out through-hole resistor is or why it’s there.
Surely it can’t be a part of the temperature control loop, so I would guess it’s a thermal fuse to shut off the blanket if that resistor burns because it handles power to the heating element.
If so, what THE FUCK were the designers thinking?! Couldn’t afford even a small power resistor with a heatsink and a cheap thermocouple to a temp sense IC?!
Nah it’ll be ok, either it burns out the resistor and the customer is not injured or the customer’s house burns down. Either way no deaths, just complaints about our shitty build quality.
Second, they’re using WAY too much solder for these surface mounts components.
And third, why has R16 shifted from it’s pad? Bad soldering job from too much solder? Bad placement from the PNP machine? Or, god forbid, something gets hot enough to cause the solder under that resistor to start melting?
It’s genuinely shocking the amount of stuff that’s just being allowed to be sold these days.
If you can’t get the blanket repaired OP, please consider sending this to Big Clive as he’d have a field day with this.
- Comment on Is this soldered controller repairable by an amateur? 12 hours ago:
A bit of context for you:
U1 is a reference for the PCB designer and assembler (if soldered by hand).
The information you need to find a replacement is the etched text on top of the IC (Integrated circuit, a.k.a “chip”).
If you’re able to read that, put the whole thing into Google or Octopart or your electronics component supplier of choice (Mouser, DigiKey, Farnell, etc). and you should find the IC you need.
- Comment on Sincerely, your literally poorest europoor. 1 day ago:
IP over Carrier Pigeon.
- Comment on MrBeast scraps AI YouTube thumbnail generator days after announcing it: 'If creators don't want the tools, no worries' 3 days ago:
May I present, The Smiler Image
- Comment on Shut up Jimmy 1 week ago:
Or philosophers and philosophy.
Damn philosophers, they ruined philosophy!
- Comment on A 3-tonne, $1.5 billion satellite to watch Earth’s every move is set to launch this week 2 weeks ago:
As an engineer I would like to second this motion to get “Mach Yeet” adopted as an IEC standard technical term.
- Comment on Caption this. 3 weeks ago:
Title of the paper:
Proposal for B-rated Motion Picture to Stimulate Growth in Cinema Ticket Sales by Utilising Highly Contagious Memetics in the Screenplay Writing Process
Caption: Fig 1. The Plot MacGuffin of Smart Cocaine Megladon 2
- Comment on Downing Street ‘exploring plan for digital ID cards’ 3 weeks ago:
Which will be met with the response “but I’m not an ‘immigrant’ why should I have to carry this ID card?!”
‘I’m not an immigrant’ is their code for “I’m white”.
As much as xenophobic cunts fantasise the idea of stricter border controls and US-ICE style raids, they’re also the same cunts that complain about long queues at airport security and HATE it when an authority figure questions them or forces them to do something.
- Comment on Downing Street ‘exploring plan for digital ID cards’ 3 weeks ago:
They keep trying this every few years.
This ain’t going to work unless it’s sold to the public like Estonia’s X-Road:
Complete digitisation of government, using the NHS, passport application, driving, taxes, etc. to reduce cost overheads and speed up government services. It needs to be a properly implemented super app with best industry security practices. I’d even go so far as to make it open source and have UK developers who log contributions to the project get a tax rebate according to hours/lines contributed as a sort of payment.
Plus it would help sell UK digital services abroad by developing and advertising a local talent pool.
Getting the UK public to be on board with just a digital ID isn’t going to fly. Why when your driving licence/learners license or passport is already being used as an ID that people carry around, and then you have your NHS number, your national insurance number, and even a gov.uk account.
What the point of adding another one?!
- Comment on Most American headline 3 weeks ago:
May I introduce the Victorian concept of Children in Workhouses.
That’s where you’re heading.
- Comment on Don't Look Up 4 weeks ago:
Well she is from Doncaster so that explains a lot of her delusional thinking.
- Comment on Never Forget. Please dear god don't forget 4 weeks ago:
We all are Ralph, we all are… (Slaps knees) Aaanyway, just got to get on with life (stands up and walks off stage left)
- Comment on Spread of sexual deepfake images created by generative AI growing in Japan 4 weeks ago:
I think this is more a comment on the particular strain of misogyny that pervades Japanese society and not being surprised that a country which has women only metro carriages out of necessity to prevent sexual harassment is also having a problem with AI generated deep fakes. Though the latter is also a problem in many other countries which have access to these image models.
- Comment on 100% people who drink water die 5 weeks ago:
- Comment on [deleted] 1 month ago:
As someone who felt discouraged from participating in PE because of teachers forcing activities I didn’t like, ended up hating exercising, and now getting back in shape and trying to find active hobbies so I have a good physical activity level; thank you, please keep it up.
Also, if you’re able to please can you do two lessons on healthy eating with an activity for students to make / use a calorie counter and then the following lesson present the calories and and the macros of what they ate.
I would have really appreciated knowing that earlier on in life so when I left home and had full control over what I ate I would have eaten better and avoided putting on so much weight.
- Comment on The mods are asleep, post wide office chairs! 1 month ago:
I think Edward the 7th had one of these when the Throne started splintering under his enormous reign.
- Comment on Philosophy moment 2 months ago:
I don’t know that- AAAAAAAAAAAAAAHHHHH
(Gets tossed into the air and into the Gorge of Eternal Peril)
- Comment on Philosophy moment 2 months ago:
This is why you have to factor in the airspeed velocity of your laiden and unlaiden
swallowspigeons. - Comment on I feel happy.. 2 months ago:
Ah stop your moaning, you’ll be stone dead in a moment.
- Comment on New Harry Potter series based on the "magic" of Weed 2 months ago:
- Comment on LinkedIn’s cofounder Reid Hoffman says seeking work-life balance is a red flag that you’re ‘not committed to winning’ 2 months ago:
His line going up.
- Comment on Today's Survey. One point for everything that you have NEVER DONE 2 months ago:
- Comment on Virgin Physicists 2 months 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 2 months 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? 3 months 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’ 3 months ago:
- Comment on Amazon Restricted Vaginal Health Products for Being ‘Potentially Embarrassing’ 3 months ago:
Christ, I wish Americans would get over their embarrassment that half theirs population has a vagina.
- Comment on [deleted] 4 months 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 4 months 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 4 months 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.
