Sensei

An electronics technician needs: a multimeter, a soldering iron (preferably with adjustable temperature, but these are more expensive), a solder sucker, a set of screwdrivers of various types, miniature tweezers (such as those used for plucking nose hair), and an antistatic mat may also be useful. If you intend to repair phones, there are special mats with designated places to put screws, which will prevent them from getting lost. e.g.: Their prices are so low that if I were you, I would immediately order one for repairing phones and one normal large one. A cell phone repair kit would also be useful—they are very cheap. Around $5 for Android and $5 for iPhone. If you also have a 3D printer or a more expensive soldering iron with a built-in hot tip, then you have everything you need to repair a damaged phone screen. (The filament 3D printer has an adjustable printing surface temperature. https://en.wikipedia.org/wiki/Fused_filament_fabrication The cheapest FFF/FDM 3d printer from Creality Ender-3 costs 250-300 USD) That's probably everything that's cheap and for everyone. More expensive items include adjustable power supplies, both voltage and current, which prevent exceeding the range. These devices can be purchased for between $50 and $200. Even more expensive items include microscopes for electronics engineers (although there are some imitation models available for less than $25—I have one, and it works fine, but it is slow rate at 640x480). An IR camera is very useful for checking which component is heating up the most, i.e., is likely to be damaged because unlimited current and/or excessive voltage is flowing through The cheapest IR cameras cost around $300-400 and connect to cell phones via USB. I've seen some junk for less than $100, but they have a resolution of around 32 pixels or something like that, so it's better to go for higher resolution. An oscilloscope is a useful but expensive tool. $100-$500. However, it can be simulated using Arduino and a voltage divider and/or an opto element that will buffer between the circuit and Arduino. An oscilloscope will allow you to see what current and/or voltage is flowing through a given circuit over time. This way, you can find out whether the computer is booting and at which stage it fails. More expensive laboratory power supplies have their own current/voltage consumption graph on a time chart. The repair procedure for any electronic device is as follows: connect a laboratory power supply to the device, point an IR camera at it, and start increasing the voltage and current from 0V/0A (remember to zero it prior connecting!), watching which components heat up. You reach the voltage that it gets from the power supply at the factory (search the net/read etiquette). You see if it draws current, and you adjust it along with the voltage. If it's a simple fault, the damaged component usually lights up on the IR camera. Then you start analyzing whether it exceeds its parameters and why this may be happening. A typical component that breaks down is an electrolytic capacitor that has worn out and whose parameters have changed, causing it to no longer meet the basic design specifications. Sometimes you can even see which components have burned out and literally exploded. This often happens with capacitors, for example, and sometimes with resistors and chips (they then have a hole in their casing). If the CPU or another chip is damaged, you will still have a problem finding a replacement. Often, you have to buy other devices, the same model, and transplant them, cannibalize them. Chips can be non-programmable or programmable. To repair a programmable chip, you not only have to re-solder it, but also copy and extract data from the old broken one. Various readers are used for this purpose. That's a different story and a different level of difficulty. To properly replace such a chip or CPU on a computer or laptop motherboard, a so-called preheater is useful. If you intend to solder a lot of cables, you may also consider purchasing a soldering pot. Their prices vary depending on their tin capacity and power. If you don't intend to repair but design electronic circuits, you will need breadboards and cables for them (male-male, male-female, and female-female), as well as quick connectors for breadboards. Cheap. $5 for a large breadboard. A set of cables for them probably costs $5-10. Arduino is a must-have. Raspberry Pi optional. You don't need starter-kit - it is a waste of money. You don't need original - clone is good and cheap too. $10 for Arduino-clone is fine price. I hope this is enough to get you started on your adventure with repairing and/or building electronics. Your wallet is your limit.. ;)

KingKobra, from your arguments, it seems that you are giving science some human-like attributes.. Which is basically absurd (but very typical for humanists).. Now the absurdity of your argument has been further reinforced by your ignorance of mathematics. If we take the number of people who die in current wars, terrorist attacks, disasters, whatever, and divide it by the total population, we get a tiny percentage. It is the mass media (and the speed they share some unverified information) that blow these tiny numbers up to gigantic proportions because that is how they make money. And if we compare this to what happened a thousand or two thousand years ago, the loss of 100,000 people today vs. 100,000 people 2,000 years ago (with a world population several dozen times smaller) looks completely different. How can we talk to humanists? Go learn some math! Science has nothing to do with the problems you are talking about. So how could this indicate the limits of science? Which science discipline? Humanities or real science? Science is not a living entity, and it should not be endowed with any humanistic, fantastical attributes.

I know that. It must be forum software bug, because I quoted Patch Cabbage, not you.. I don't know which part of my post was grumpy. Was it when I wrote “This is nonsense” to summarize his post.. ? I copied and pasted his post into ChatGPT (without suggesting my answer), just in case I had made a mistake in the translation, and it agreed with me that the post didn't make sense. For example, ChatGPT: "CRT televisions rely on careful HV safety design. That modification could have been extremely dangerous, even if it “worked”. " (about replacing transformer by resistor+diode).. "The person is expressing real safety concerns, but much of their reasoning is incorrect or based on misunderstandings." "Their message reflects anxiety, personal anecdotal experience, and some misconceptions—not an accurate technical assessment." OK. I will try..

You can use a 250 V-rated capacitor in a 25 V circuit, as long as the capacitance value is correct. The voltage rating just indicates the maximum voltage the capacitor can safely handle. Sometimes manufacturers use components with higher voltage ratings simply because they had them in stock and/or they were cheaper. It doesn’t mean the design is ‘dangerous’. This is not a rule. BTW, to rectify 230/240 VAC, capacitors rated at 400 V (!) are used, not 250 V. So you're wrong anyway..

What a load of nonsense.. A mains-powered supply - whether switching or transformer-based - always has the same dangerous high voltage on the input side. The difference is in efficiency and design, not in the presence of high voltage. The real difference between a linear and a switching power supply is not the presence of high voltage, but the operating frequency and the way energy is transferred. Both are mains-powered and both have dangerous primary-side voltage. SMPS just use high-frequency conversion to make the transformer smaller and more efficient. Well, that's just total nonsense. A transformer changes the AC voltage to a higher or lower one, while a resistor and a diode only cause a current limitation, rectify the sine wave to pulses, and still leave the voltage unchanged. The pulse frequency before and after remained the same.

It's physically impossible. You're holding the jar in your left hand, so your hand is holding it from behind, and your right hand is holding the screwdriver. You can't hurt either wrist. Insert a screwdriver (only a flathead/minus type) into the gap between the jar and the lid, and gently turn it clockwise until you hear the hiss of air entering the jar. It's just a millimeter to the right. Once the pressure has equalized, you can unscrew the cap. There's no hocus pocus involved. You don't need to be a nuclear physicist to know how to open a jar. I open beer bottles like this every day.

All you needed was a screwdriver.. quick and easy.. pry off the lid and let air in, and once the pressure is equalized, you can unscrew it without any problems. That's a bad idea because you'll ruin the lid. You're right here. Jars are easier to open if you put a cloth on them first.

They have “a million chips” (seriously, not quite) because modern power supplies are usually “switching power supplies”.. https://en.wikipedia.org/wiki/Switched-mode_power_supply They are more efficient (lose less energy) than traditional power supplies (from your sketches) with a transformer. They generate less heat. They are smaller. They are cheaper to manufacture (contain less copper). They use MOSFETs (on your sketches there are NPN/PNP).

No one here steams them. Put them in water and boil for over an hour (don't peel). Then wait for them to cool down, peel after cooking, and grate them. Next, fry them in a pan with oil, with onions, also grated. Season with salt and pepper. This is called fried beets. It is used with Viennese schnitzel with a potato puree.

So that it's difficult to understand what it's really about? ;) It is difficult to come up with something innovative. One innovation is a development of an innovation from years ago, which is a development of an innovation from hundreds of years ago, etc. Innovative, it is a flying chair (magnetic? drones?) with a built-in toilet for waste disposal.. ;) I did not suggest what you are suggesting. The use of a translator is obvious because it makes mistakes that are easy to spot, which ordinary people do not use in their speech ("dear colleagues", this is not what I meant - translators put quotation marks with an internal comma or period, e.g. “blah,” whereas someone writing it by hand would write “blah", ).

Any glass jar will do, with metal lid, because you can make a hole in it, and then use a glue gun (available at electronics stores) to attach it to the lid permanently, sterilely, and hermetically. https://www.google.com/search?q=glue+gun+ebay Today I made 2 liters of beetroot sourdough starter. 500 g beetroot 4 cloves of garlic 350 ml lukewarm water large bay leaf 6 peppercorns 4 allspice berries teaspoon of salt Peel the beets, cut them into cubes to make them easier to put into the jar. Add spices and water. Wait 7-10 days. After drinking the first portion (e.g., 1/2 - 2/3 of the juice), you can add water to the rest and repeat. I usually add onions too, but today I'll try the procedure without them. If you want to do the above, I will give you the procedure for making soup from it in a week, once you tell me you have the sourdough starter. It's a question of whether you have red beets at all.

Philosophy, not to mention that it is abstract, has never been able to do the things you are talking about.. This shows that you don't understand this saying at all.. the water molecules have moved, so it won't be the same river, but a different one, with different contents.. “Untangling Gordian knots” does not mean cutting them, unless it is a play on words. Someone could just as well knock over the chessboard and say, “I won this game of chess.”.. The Gordian knots remain tied.

It's just a matter of purpose (aim/goal in AI/LLM world). Before they build that bridge, they have to get around by boat.. The only questions are: 1) how, 2) how much will it cost, and 3) will it ever pay for itself? Some say that the goals in the current LLM are poorly set, which is why they make statements (hallucinate) when they don't know something. If someone plays a game where you live or die, you will choose your answer without batting an eyelid. If someone can place a piece of wood across a river that is 2 meters wide so as not to get their feet wet (or if the tree fell down on its own due to old age), then they can imagine everything you are talking about right now. Don't go to extremes. Bridges were built long before the Romans. If you give a three-year-old child building blocks e.g. Lego, they will figure out how to build an arch bridge on their own. All they need are the blocks. Arkadiko Bridge (Greece) is from 1300-1200 B.C. (i.e. 400-500 years before Roma establishment).

Modern methods of creating AI/LLM involve designing a world in which this new creation learns everything on its own, i.e., there is no stage of imposing knowledge on it that is provided by humans during training. It has to go through this millions, billions of times to understand and remember what it can and cannot do, and how “physics” works in a given “world”. For example, we have an 8x8 chessboard and pieces, but we do not tell the AI/LLM what the possibilities are for each pieces. We only do f(x)=[giant number of parameters] which returns true or false. If it tries to move a piece to a place that the piece cannot move to, it immediately fails (return false) the entire game. From this, the AI/LLM deduces what possibilities each piece has. It learns “physics”. Later, through millions and billions of repetitions, it figures out how to play the game. *) If you create a function f(x,....) = (....) that returns true or false, and you start randomizing the parameters, eventually some combination may work.. You just need a very long time for randomization. You have four blocks in your DNA, and you arrange them in some order, e.g., random, and it either works or it doesn't. The creatures that survive are those that have the right combination of these random blocks in a given environment ( f(x,....) = true for them) *) https://en.wikipedia.org/wiki/AlphaZero

Using crap like the cloud to protect against DoS/DDoS attacks or bots results in such a website is not archived: https://web.archive.org/web/20250000000000*/rationalwiki.org At this point, we should have a complete backup of all posts: https://web.archive.org/web/20250000000000*/scienceforums.net It's total crap. Who in their right mind cares that there is no spam now, and in 20 years, not to mention hundreds of years, no one will know what we were talking about here? A day like any other. I had tens of thousands of hacker attacks on my servers every day.

I'm watching a video on YouTube with one of the most famous local physicists, and he said: I disagree with the first part, of course, but with the rest, absolutely... ;)

HTTP server can return any code they want. It could be a lie/fake. But suppose so it is true return code, we make things like these (you lucky *** I have this error at the moment): This means that rationalwiki.org is in an Akamai cloud. I don't have any servers in this cloud, so it's hard to say, but I can talk about similar situations in other clouds. Cloudflare has an option to act as a proxy server between its server and the real server that is set in the configuration (therefor the name "cache..."). Ping IP domain.xyz gives the cloud address, the cloud forwards this data to the real server, and it responds, and the data comes back. If possible, the data is cached so that the same data does not have to be sent to multiple users. "backed fetch failed" sounds like connecting to the original server that is proxied is impossible (from Akamai cloud server). People use cloud servers such as Cloudflare to hide the addresses of their real IP servers. scienceforums.net also uses Cloudflare to hide its real server IP. If hackers discover the real IP address of a server, they can attack it and prevent the cloud from connecting to it. It could also be an attack on Akamai (or some other cloud) that would have a similar effect. But there is no indication of this, because downdetector shows nothing. It also depends on what servers the real RationalWiki server uses, e.g., database. If it connects to other servers that are down or currently under attack, requests to it will fail, as they will e.g. timeout, and it will also be down from the user's point of view. I have a VPS that, after restarting the server (physical), does not start the Apache servers (application/service) it has on it. You have to start them manually. If Cloudflare acts as a proxy for it, you will have connection errors with that server (VPS). Some pages load (because some have been cached by cloud proxy service), but others do not..

It would be difficult to imagine a more grotesque text than the one above. Creating a conspiracy theory to explain an attack on a website that fights conspiracy theories. Simply chapeau bas..

If time flowed backward instead of forward, everything would flow backward, e.g., a star would gain mass-energy (an aging star has less mass than the gas cloud from which it was formed (ignoring incidents such as the intrusion of some object) ).. If one equation has a + sign and the other has a - sign, then they are not the same.

"Electro luminescent (EL) light is technically described as a Light Emitting Capacitor (LEC)." I have rather something else than what you wanted to share..

Wave on water (often) does not move a tons of water (in direction it goes), instead just transfers momentum between particles.. If you go with the sea current, you don't have to do anything, it flows beneath you, but when you fight against the current, things get rough. For modern means of transport, such transport is too slow. In different regions of the earth, the sea current flows in opposite directions, so the first explorers of America could sail with it (rather than against it) and reach America (or return), but they had to use it, not fight it. When you fly airplane from the US to the EU, and vice versa, you either fly with the wind and your actual speed is much greater than the speed of sound, or you fight against the wind and your journey takes much longer. It depends on how the wind is blowing and whether the pilot has flown into the right zone. https://edition.cnn.com/travel/article/jet-stream-flights-speed-of-sound If someone wants to achieve good speed on the water or underwater, they strive to minimize resistance between the vehicle and water molecules. If someone wants to achieve good flight speed, they strive to minimise resistance between the vehicle and air molecules. If this resistance cannot be avoided, water currents or air currents are used, which flow wherever they want. Before the invention of steam engines, in the age of sail, this meant that you sailed where the sea current took you, which meant that you did not sail the shortest possible route in a straight line. Today, the same applies to aeroplanes, only much more dynamically, because at different altitudes you can have winds blowing in opposite directions. (which looks funny in films, because you have a cloud flowing in +x, and at a different altitude a cloud flowing in +z, etc.) Perhaps in order to appreciate my statement, you need to know the speed of an ocean current? https://www.google.com/search?q=sea+current+speed

..and 99% of Russians are masochists.. ps. Because only a masochist could endure hundreds of years with rulers who were such criminals.. ps2. But average they are even less educated than the average American.. I recently saw a film in which someone (from old USSR) said that the only Western book that the USSR allowed them to read was "The Three Musketeers".. or something like that.. Since you come from Russia, can you tell us what Western literature was available in the USSR (required in the curriculum, i.e. you didn't have to look for it yourself on secret and dangerous places.. ;) )? Tell us what your parents, grandparents, and you had to read at school. Both Russian and foreign literature. This will be a more moderate topic of conversation. Contrary to appearances, school reading material can teach us a lot about what ordinary mortals have learned about the world around them. After all, what will be on the geography test? The average American knows nothing about geography. But in the USSR, geography was rather good. I remember those times. The history will be very subjective, so it would be very controversial, but if you want, share with your Western colleagues on the forum what they taught you. It would be quite a ‘nuke’.. ;) ps3. When they went to Ukraine, to Bucha, they stole toilet seats, because in their country they do it in a hole in the floor in a special little house outside the house.. The first ones who attacked were people who had never seen civilization before.. They stole all the electronic equipment, and later, when they tried to transport it to Russia, it was confiscated and dismantled, and the electronic components were used to manufacture new weapons.. When the Ukrainians recaptured the territory, they saw toilets without toilet seats... and took thousands of photos, amazed... ;) I know it sounds unbelievable, but they showed it for a week, two or three.. all houses in Bucha and every toilet without a seat..

What does this have to do with computers? It's electronics.. This smells like preparations for a hacker scam to me. Normal people don't need to have remotely controlled routers/access points outside their place of residence. Anyway, You need to check the voltage provided by the router's power supply. Use a multimeter for this. If it shows 5V, then you don't really need to do anything (not much) to connect it to any existing power bank. I think that will be much more convenient. You need to buy a plug that fits this router/AP power supply, cut a USB-A cable, and solder + and - to the plug. Plug the USB-A into your existing power bank and the plug into the router/AP. It will take less time than writing this message. You didn't provide your router/AP specifications. However, if it uses a voltage other than 5V, you will indeed need to increase it using a step-up booster. The XL6009 on Ali Express is cheap. And from what I can see in the photos, it has an adjustable resistor. So what do you need to do? Measure the voltage that the router needs on its original power supply. Connect a multimeter to the step-up booster output and turn the adjustable resistor until you find the same voltage. Then make the cables as in the previous case.

During fermentation of wine etc. you use fermentation pipe which looks like: It can also be used for fermenting vegetables. Although I didn't have to do that. It allows CO2 to escape without O2 getting inside. Without O2, microorganisms that need it will not be able to grow. My personal experience tells me after a week everything is already consumed.. ;) I'm eating Caroline Reaper, 3.5L still to eat, which dominates everything.. ;) Groats with Carolina Reaper taste the same as potatoes with Carolina Reaper, and the same as ground beef with Carolina Reaper.. ;) It is important that the vegetables we are fermenting (pickling is a wrong word - because it is with acetic acid and sugar) remain submerged under water at all times. They need to be weighted down with something so that they do not float to the surface. Pickling is a complete different technology. Online translators keep wanting to call what I want to say “pickling”..

Yeah. I create more kefir by adding to the previous kefir bottle more milk and the next day+ have a new stuff which even tastes better than the one bought in the shop.. From what I can see online, carrots and radishes ferment in 5-10 days. Only peppers (paprika) have a long fermentation time, measured in weeks, from your list. I use a lot of garlic, onion, salt and black pepper. And that's enough to keep other microbes at bay, without blocking the air supply or keeping things in sterile conditions, etc., etc. For 1-2 liters, you need one (or half) garlic and probably one (or half) onion, and 5-10 g of salt. Plus whatever you want to ferment. ...check how much salt Kahm yeast can tolerate, and add a little more... ps. You can remove overdosed salt after fermentation by placing the product in fresh water for a moment.. ..or day.. People do this with herring that has been salted for months. Do they keep it in milk overnight? Or something like that.. The salt level in herring and the liquid then evens out.