Hearted Youtube comments on DENKI OTAKU (@DENKI-OTAKU) channel.

  1. My biggest problem with these 1% resistors, is that the blue body makes it very hard to read the color bands!
    206
  2. Thanks Chemi-Con for supporting Denki Otaku, making Japan great again one capacitor at a time!
    171
  3. I love how the AI voiceover pronounces anode and anodic about 5 different ways.
    142
  4. Usually you like to get cheapest part from ali-express but then you need this multi million dollar equipment
    75
  5. Very nice collaboration and informative video! It was great to have the EC differences spelled out.
    66
  6. Anything from amazon is going to run the risk of poor quality. Even well reviewed items, if you pay for a genuine item, and the seller ships a genuine item, you can still get a fake, due to amazon's "equivalent merchandise" policy, where they will ship an "equivalent" item from a closer warehouse for faster/cheaper delivery. The problem is they trust the vendors as to what is "equivalent" and they do business with a lot of sketchy sellers.
    46
  7. Any liquid can be used as an electrolyte as long as it's electrolyte
    43
  8. Excellent video! Very well put together information, thank you.
    39
  9. If you run them in a dc-dc converter with much higher switching frequency, where the switching loss may be the majority of the losses, the “fake” MOSFET may actually perform better than the “genuine” one because it is faster. Also, the fake one may perform no difference or even better in linear applications such as an audio amplifier, within its limitations. Anyway, a fake one is not always worse. The biggest problem is that we don’t know what it was before it was remarked into something else.
    38
  10. Heat transfer compound is a 2 component mix, that is poured in at final assembly, to fill all the voids. Stays flexible and somewhat sticky, as it will slowly flow with heat to help ensure all the voids are filled. Similar to the thick thermal pads used in equipment, in that it ensures better heat transfer from hot areas to the case, though it is not as good as a proper aluminium heatsink, but as it is cheap, insulating, and also helps with minimising creepage on the board, it is used.
    31
  11. I think asking Nippon Chemi-con, for what their more unusual, specialised or unique capacitors are, in a prepared interview, might make for a good video if you do any more in the future. What are their coolest products they are most proud of, and why? Maybe you are able to talk to one of their engineers.
    28
  12. I'm so impressed with this video. You managed to explain simple way what is the difference between electrolytic and solid caps. Domo arigato BTW Chemi-con was always my favorite brand of caps
    28
  13. I have been trusting Japanese quality brands of electrolytics for a long time. Japanese electronics made as far back as the 70's still have good capacitors in them and they don't seem to need replacement, even though some people habitually do so out of worry. The capacitors that I do fear are ones made in China, or Chinese made fake copies of Japanese capacitors.
    26
  14. Very informative and incidentally I bought 50pcs IRFP260N and I was lucky at least for not to see that their marking is similar to the genuine one. I will break one apart tomorrow to see the die size. Your videos are always very interesting to watch.
    26
  15. I find a lot of fakes on hobbiest websites. Purchasing from a reputable supplier helps but of course now they charge a pretty penny... So it's a balancing act. The rule of thumb I keep in mind with power supply's (of all kinds) never run it more than 50% of its component ratings and for the fakes always divide the claimed ratings by 1/2 😅
    25
  16. One of the best video related to soldering.... ❤️❤️❤️
    21
  17. Thank you so much !! It is helpful both educational and informative. I love to learn electronics when I was a kid. However, in college I choose language programming/coding and graduated and earn a living. I took higher math as well using those scientific calculators as part of my curriculum. Everyday new gadgets release in the market facinated and curious the internal circuitry and functionality. The more my interest into practical electronics. I am facinated as well with robotics and AI, how machine and coding works hand in hand. I believe it is more handy for me, to learn electronics since I have already knowledge in programming. I am bit in my 50's, and retired in programming and I love to learn electronics as a hobby, fixing electronic components in my free time would be a wonderful experience or perhaps create a simple circuit to automate some simple task. With your video, I think I have an idea what are the things I need for a start. I have gathered some of those in my years but have no time. Anyways, I am hoping it is not late for me to learn new things especially in electronics in my age. Looking forward to more of your videos. Kudos !
    19
  18. Hello. The illegible writings in Russian on 0:46 leterally stands for "The measure of I_R was carried out. Tsanka", which means that all the diodes were tested for their reverse current. Then, it is signed "Tsanka", which is a first name of the person who carried out the test.
    18
  19. Thank you for talking about the responsiveness of the touchscreen controls! With how powerful the processors and FPGAs have gotten there is no excuse for oscilloscope companies to release these devices with laggy, unresponsive controls! The original iPhone has far smoother touchscreen response and it was released 15 years ago!
    16
  20. Very clear explanations! I'm loving your videos Ichiken sensei
    14
  21. That's why they always add an extra capacitor, That you think is not necessary but it is because it's preventing the other one from falling apart, Thank you for this well explained explanation. I was always curious about this.
    14
  22. LM2596 - POSSIBLY REMARKED LM2576
    14
  23. It would be useful to publish a diagram of the device that will allow an ordinary amateur radio operator to identify a fake. Those devices that you are demonstrating are my unrealistic fantasy.
    13
  24. Fantastic video, really interesting to see the process. I got a capacitor with the sleeve on the wrong way round a few months ago - I was right to guess that the long/short leads would be the truth, not the sleeve. It wasn't made at this factory! But even if that English narrator is working for free, you're still paying him too much. Seriously, how arrogant must you be to not just look up how to say words you obviously don't know, that appear dozens of times in the script.
    12
  25. Although I agree that if we consider just the solder, lead-free solder is better for the environment. But if we look at a larger picture, from my experience and from what I've been able to gather from research, electronics made with lead-free solder tend to fail more often since the solder joints are more brittle and break due to mechanical stress. Then the whole device is generally thrown away. This should also be taken into consideration when determining impact on the environment. All that being said, just discovered your channel recently and I'm enjoying your videos!
    10
  26. Very good from India
    10
  27. The polymer electrolyte capacitors do contain electrolyte (it's right there in the name), it's just a solid electrolyte instead of a liquid one. Technically, they're all "aluminum" capacitors as well (the electrodes are aluminum, and the dielectric is a layer of aluminum oxide).
    10
  28. Shoulda used Brawndo - cos Brawndo's got what capacitors crave - it's got electrolytes! I wonder if the smell is any better when the Coke capacitor blows up...
    10
  29. Excellent explanations ! I was amazed at the results of freezing the electrolytic capacitor and demonstrating its discharge curve. It made total sense to me when you did this. It was something I have never though of before. Makes you wonder if any "antifreeze" types of electrolytes have been researched. Probably so.
    8
  30. A crystal radio is a must have especially during a natural disaster.
    8
  31. Thank you for a very informative and well presented run down. Well done.
    8
  32. You can check osciloscope comparison video below. but in Japanese. HDO6000B https://youtu.be/6SnDINvqMxs Tektronix 4 series https://youtu.be/-ptmZV4bUvU
    8
  33. Looks like some good engineering. The only thing missing is the ability to connect to an app or PC for some measurement monitoring and automatic graphs😊
    8
  34. the impregnation has started 💀
    7
  35. Amazing tool. But for me just a dream 😂
    7
  36. I'm pretty sure it's a text to speech; they've gotten much more advanced and real-sounding over the last few years but their pronunciations are definitely flawed. I heard some small auditory errors, so I am sure that it is a tts.
    6
  37. Nearly all of the words were pronounced as a native North American speaker would say them, and all of them were decipherable even if pronounced a little unusually. Wound was pronounced as "woo-nd" (like an injury) instead of "wow-nd" (as in rolled-up). As a native speaker I'd never even considered those two words were homograms. until it said that I'd thought it was a person reading a translated script. More technical words like "Anode" and "Cathode" seemed to trip it up as well, though not consistently, and not badly. Mostly just the wrong emphasis on the wrong syllable. Still an amazingly clean pronunciation and pretty smooth tone for a text to speech bot though! Making the coke electrolyte example caps was a great way to shake up the video as well.  @DENKI-OTAKU 
    6
  38. Amazing video, ありがとうございます! Solder fillets the shape of Mt Fuji - love it 🥰
    6
  39. Hello Mr Ichiken, this time, in the English version, you will present the construction intricacies of electrolytic capacitors. I believe that the condition of increased capacitor operating voltage by approx. 25% should always be met. Congratulations! Recently, I have performed tests that can be referred to in three groups: First: Use of the base Controller and 230 VAC/62 V/17 kHz//0.65 kW Power Supply to run the BLHF-RM (compound coil micromotor, phase angle 180 degrees). The total power of the control lines [L1 - L3] and [L2 - L4] = 128 W during the average rotation of 28.705 Hz = 1.772 kRPM was obtained; load current max = 7.32 A; PF approx. = 1. Overheating of the IGBT key transistors (too much forced in previous tests) was found, which caused irregular voltage waveforms, but regular current, close to rectangular. The author's earlier tests led to the same conclusions contained in the film by the renowned Texas Instruments company, address: https://youtu.be/_6-_jvZe7iA. Second: BLHF-RM (compound coil micromotor) powered by BLHF-RM No. 3 (phase angle 135 degrees; P = 6.17 kW - as a generator, driven by an angle grinder 230 VAC/5.5 kRPM//2.1 kW). The total power of two control lines = 0.203 kW; PF of phase windings = 0.7108. The value of the reduced power factor was affected by the different angles of the location of the magnetic poles in the armatures. Third: Powering the micromotor with the frequency converter XSY - AT 1/1.5 kW. Data: f = 344.00 Hz = 20.640 kRPM; RMS = 23.36V; I (loads) = 11.20 A; cos φ = 0.9008; P = 0.236 kW (power record!). Load current interpreted by the ideal sine function (!). It should be noted that the author conducts tests on the basis of devices constructed at home and on a low budget. I invite you to visit my You Tube channel and website: www.mojewynalazki.pev.pl. My new study, Chap. VD. I cordially invite and greet all Internet users ❤.
    5
  40. Very informative, presented so even a novice can understand it. Thanks so much.
    5
  41. I have a goot soldering iron , it is older than me & made in japan!. Works great everytime.
    5
  42. There is a missing current limiter after the rectifier, in case of ideal components without it it would cause a huge spike of current.
    5
  43. This guy’s computer English is grammatically perfect and sounds pretty good. If it’s not a computer, it’s still good.
    5
  44. Very good video. I enjoyed seeing the signal on the oscilloscope. I don't have the equipment to do that.
    5
  45. silly muricans who can't handle subtitles so now we get voice over..
    5
  46. Hello fans of Mr. Ichiken and Mr. Ichiken 😀. This Hitachi inverter has already been presented by the host, but in the Japanese version. Full professionalism as usual! The three complex power transistors, or rather their configurations, are very impressive. I counted as many as 14 connections for each of them. Also the Infineon Technologies tri-core processor is very powerful. Mr. Ichiken pointed out the cooling channels and tabs that prevent the wrong assembly of power semiconductors. Like any device, it has the right to break down. I'm curious if it's worth repairing? I thought the simplest thing would be to replace the power transistors. But maybe I'm wrong. I invite fans to my new clip published on YouTube. It presents an innovative system of functioning of the Brushless Hybrid Fast - Rotation Motor with complex coils of its own design based on the current of the sine function of two control lines. In the absence of a suitable four-phase inverter, it is powered by a frequency converter with single-phase current. Today I accelerated this mini machine to 300 Hz = 18 kRPM. Regards 😀.
    5
  47. As the switching frequency goes down, the inductor size (and saturation current) needs to go up. This is probably why the efficiency is very low. If the switching frequency was 150kHz, the inductor would be cooler and the efficiency would be higher. There is a sweet spot at about 400kHz for DC-DC switchers that allows relatively small inductors while using common MOSFETs and not dissipating too much heat in the MOSFET. Once you go up into MHz switching, the MOSFETs must be more specialized (low gate and transfer capacitance). Efficiency can drop again as you go up into the MHz.
    4
  48. Fantastic.
    4
  49. Great video, always nice to review soldering techniques. Love your channel
    4
  50. A great book on understanding this stuff is "electromagnetic compatibility engineering" by henry ott. Great video!❤
    4
  51. Great quality video as always, now whenever I pop a capacitor I’ll think of a coke bottle popping open 😅
    4
  52. such a neat tutorial, thanks, and i hope to see more content for beginners like me
    4
  53. can we use beer for electrolyte?
    4
  54. ¥4,720,000 高すぎる。
    4
  55. Satisfied ☑️
    3
  56. Great video but the pronunciation is utterly painful, Alumimum - Enod. Poor auto translation
    3
  57. Why do I feel like Elegoo would make more sense with one less o and Longruner was meant to have another n?
    3
  58. Really Informative! Thanks. Keep up your great work.
    3
  59. I have 3000 no of metal film resistors, 2500 of carbon film resistor and 500 pcs of 1/2 and 1w resistors...... Fun fact...- I ❤️ only carbon film resistors.. just because it's body colour and colour band... It's easy to read any unknown resistor without multimeter.... Last week I have subscribed your channel.. soldering related video is amazing.. lot of ❤️ from Odisha, India... love Japan... 🙏🏻
    3
  60. excellent engineer! thanks or sharing
    3
  61. Excellent video!
    3
  62. 16:30 I think the ESR difference is due to unprecise (manual) winding, difference in tension and position
    3
  63. as a newbie to electronics, I always mess up soldering, but you made it look so easy 😮. Hopefully one day i can solder like this. How can i prevent burning my pcb though ? I usually try to touch the tip on the pcb as you mentioned but most of the time it burns the green layer and exposes the wiring inside
    3
  64. An awesome diode and an interesting video. Thanks. The diode looks like a very small vacuum tube. The tiny little parts inside, and the way the glass package is molded onto the leads. Cheers from Canada.
    3
  65. Yeah i have no idea what you're saying chief, but i love listening to you
    3
  66. Another advantage of the polymer capacitor is there is no electrolyte which may seep from the capacitor, causing leakage paths on the PCBA and corroding the copper traces, eventually leading to open circuits.
    3
  67. Thank you very much for your information to learning electronic.
    3
  68. What is the use of such high power / high frequency probes? Car inverters run at lower end of kHz. Do you work with commercial broadcast transmitters? And does it make sense to combine high power work with such a high end scope?
    3
  69. Very informative and interesting. Just a note: at 17:41 what is seen is an effect of ESL, not ESR. A possible misunderstanding of the voice recognition system?
    3
  70. 13:07 ElectroBoom vibes. 😂
    2
  71. brilliant
    2
  72. Amazing
    2
  73. This is what I mean when I say a perfect Teacher
    2
  74. Perfectly presented and explained by Mr. Ichiken, congratulations. What caught my attention was the excellent vacuum pump for tin suction and Flux Cleaner. Hello and welcome to my YouTube channel. I present, among other things, a new generation, four-phase synchronous motor 😀.
    2
  75. Do Nippon CC make super-caps?
    2
  76. It says "coke" on the screen
    2
  77. Clear and simple explanations. Thank you for your video!
    2
  78. 👍
    2
  79. Super lessons about capacitors in electronic device . Thank you so much.
    2
  80. nice info
    2
  81. muito bom aqui e do brasil meu canal de; RF
    2
  82. Wow!!!
    2
  83. 12:58 Wow
    2
  84. Are you serious to prefer LeCroy over YOKOGAWA ??... You have disappointed me ... Don't be surprised if you could see similar Chinese product to this model soon ...
    2
  85. ShOcK & AWE!! 1Ghz? Holy Batman... You've gone PRO :O) I have a LeCroy too - but it's about 20 years old :O\ But I usually don't tell people that. I don't want to overload them with the details. I bet you can't wait until LeCroy's are "babe magnets". Anyway, very COoL.
    2
  86. What is the purpose of inductor
    2
  87. What was the price? Not for you to brag, but it's helpful for us to have some idea.
    2
  88. Anonym. Hello. It would be very interesting to make a video and talk about what happens if you use a 100v capacitor where it was originally 50v. Or 50v where there was originally a 5v capacitor. what happens to the microfarad value during use and what happens to the reforming of the capacitor, or will the life be shorter when you apply 5v to a 50v capacitor or 50v to a 100v Or 50v to a 200v capasitor. Can someone say something about this?
    2
  89. Thanks!
    2
  90. Thanks
    2
  91. You confuse rated voltage with rated power. Resistors do have a rated voltage too, but you don't seem to be talking about it. It is only apparent in high resistance components where the power will not be the limiting factor. For instance, a 1 MΩ resistor this size would power-wise withstand 500 V (250 mW) but it will break down and flash over at lower voltages than that. 1/4 W resistors usually have a working voltage of 200 V.
    2
  92. Thanks for the video 🙂 If you want a tip for another funny explosive experiment, find an old AT/ATX PSU for 120V AC, and plug it into 240V AC. The bang is really loud, as the primary capacitor pops. That's a pretty neat ATX PSU BTW, that you have there! Such a long row of solid polymers (and wet elyts just next to them). In the PSU's that I'm used to seeing, I get a wet elyt for +12V and two more for 3.3V and that's about it. For some reason, the solid poly capacitor technology is limited to low double digit voltages. Only some hybrid models reach higher double digit volts, and although they do have a fairly nice ESR, their capacitance in the higher voltage range is abysmal. Thus, for the SMPS primaries in 120V/240V PSU, your only choice is a wet elyt. Still you shoud pay attention to brand and model, fit for the purpose/application. Solid polymer caps are a no-brainer for SMPS/VRM secondary positions, or in general for voltages of 12V and below (maybe up to 24V with no big problem). But they do also have marginal downsides: 1) they are sensitive to moisture. Moisture increases their risk of failure. 2) they have a non-trivial leakage current. Which doesn't matter for power filtering applications, but makes them unsuitable for timing / filtering and general signal applications, where the capacitor may need to be charged by resistors in the kiloOhms or above (currents below a milliAmp) and needs to be relied on to act properly.
    2
  93. Interesting. This low switching frequency can cause issues. It would be better if they used their own part number and logo instead of faking another manufacturer. Really dishonest business.
    2
  94. Very good documented and explained video. Thank you!
    2
  95. Excellent information, thanks.
    2
  96. 0:23 wtf, the logo is identical
    2
  97. Really interesting!
    2
  98. A vary well done video, learned a lot about inner workings of caps. Maybe try pepsi next time. ha ha
    2
  99. Feel free to send me your old one ;-) Great video, looking forward to your videos where you use it on projects, etc ☺
    2
  100. "Promosm" 😪
    2
  101. Great video bro
    2
  102. Sir i want Russia germanium diode how can I get it
    2
  103. Is there a version of this without the voiceover?
    2
  104. Awesome video! It would be also interesting to see the evolution of the parts "hidden" from the outsiders.
    2
  105. Thanks!
    2
  106. I like Rubycon caps reminds me of ruby laser flashlamp storage bank.
    1
  107. And now for a commercial break?
    1
  108. Electrolytic capacitors are about the only thing in modern electronics that have a limited lifetime. If they could fix this, electronic stuff would last indefinitely.
    1
  109. Thanks! That's the basics
    1
  110. Спасибо. Очень полезная информация. Теперь я понял почему при включении задней передачи мотор иногда трясется.
    1
  111. I have worked as a repair man, and have seen so many capacitors go out because they are close to heat sink, make the capacitors go out in no time.
    1
  112. Great Video! The should have kept the Nippon name; it will take a long time to get Chemi Con to be even close to Nippon!
    1
  113. I have a soldering iron a lead but I will soon have a multimeter
    1
  114. I want one, but I'd have to stop eating.
    1
  115. ❤
    1
  116. Then what are differences between battery and capacitor?
    1
  117. Very good video,thank you for the English translation.
    1
  118. One other thing worth mentioning is that Chemicon are sometimes listed United Chemi-con. They are the same company.
    1
  119. Very good video the
    1
  120. Wow wow wow wow, thank u
    1
  121. Well done. Well done, Sir! Very educative. Thank you.
    1
  122. si quieres evitar la convección sólo debías poner las celdas peltier de cabeza. Eso ayudará a la disipación térmica.
    1
  123. So big!
    1
  124. Is that a computer voice? Its pronunciation of most words was spot-on, but some of the technical terms were pronounced badly. "Anode" is supposed to be pronounced with the emphasis on the first syllable: AN-ode, not a-NODE. ("Anode" should rhyme with "cathode," which was pronounced perfectly.) "Farad" is supposed to be pronounced with the emphasis on the first syllable, and a soft final a: FAIR-ad, not fuh-ROD.
    1
  125. I randomly got this video suggested, and honestly, to me, this oscilloscope is too big. I'm a firmware developer, with very cramped desk. What works the best are PC-based oscilloscopes. I just plug in the probes, tuck the scope away, and view all the signals on one of the screens of my PC.
    1
  126. Nice job on the English dub. Thank you for sharing with us foreigners.
    1
  127. Superb video
    1
  128. Excellent video. Thanks!
    1
  129. Thanks. Very good!
    1
  130. 17:30 Flux actually increases surface tension, not reduces it btw this is the best ever soldering tutorial lmao
    1
  131. جميل
    1
  132. why there are nonpolar capacitors?
    1
  133. If your display goes out. It probably one of these. Try soldering a good cap of same or more voltage on power buss if needed to troubleshoot... else one would find a short using a dvm on each diode fet or diode.
    1
  134. Thank for good explanation
    1
  135. Good tutorial instruction and informative. Thanks for sharing
    1
  136. This is a great video, are you working on more beginners electronics videos.
    1
  137. 13:50 please talk about N channel mosfets in switching ccts
    1
  138. This is a very good video nice to have a decent translater.
    1
  139. Good job 👍👈
    1
  140. Nice information
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  141. THANK TO YOU AND LEARNED MORE HOW THE CAPACITOR ARE MAKE AND THE USES IN ELECTRONIC, THANKS. AND IN OTHER COMPONENTS.
    1
  142. Thanks!
    1
  143. That isnot grease bro, it is thermal paste. Also it is like a big water cooler, nothing special. Imo you dont need two seperate cooling systems, you can just send the cold water to inverter than to the engine. The only fascinating thing i see here is high viscosity gel there. It looks yummy. 😁
    1
  144. Voice is out of sync with lips.
    1
  145. Saw-der or Sawl-der? Cawl-king or caw-king? Drop the 'L' in both, in my opinion.
    1
  146. Thanks
    1
  147. Thank you very much!
    1
  148. Бодрые капаситоры.
    1
  149. Is Nippon Chemi-Con and United Chemi-Con one and the same?
    1
  150. Beautiful video! Thank you for sharing it
    1
  151. What happens to a capacitor if you make them as the newer "Tabless" Tesla batteries and increase the surface area of the tabs, by making one continuous roll of point contact, taking precaution to not short it out? Is that even possible? It may be a stupid question...
    1
  152. Thank you. Very good information.
    1
  153. Great video
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  154. Thank you for a very informative presentation.
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  155. nice nice bro!
    1
  156. انا حزين لأن اليابان لم تعد تصنع مثل السابق ... ونقلت اغلب شركاتها المشهورة الى الصين ... الصين لا تراعي الجودة الصناعة الصينية غير جيدة لقد فقدنا الجودة منذ بدأت الصين تصنع ..
    1
  157. Yikes! Sweet instrument. Wow.
    1
  158. Superb! Great Graphics, too.
    1
  159. You forgot to mention parallel resistance and what is the cause of capacity going up instead of going down?
    1
  160. Interesting that the polymer caps shown here are for through-hole mounting, the only ones I've seen in that style of can were for surface-mount, and through-hole caps are purportedly being phased out, making life difficult for people like myself, repairing and restoring older equipment.
    1
  161. A most Informative video.
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  162. Pleasure. Make it. In practical. And show us. Thanks alot
    1
  163. The voltage is only 15 volts.......🤣🤣🤣🤣🤣🤣🤣🤣
    1
  164. Thanks for the update
    1
  165. The coil does not have capacitance but rather inductance (small discrepancy)
    1
  166. Please review audio crossover components... especially "hi end " capacitors and different resistors
    1
  167. very good for actually seeing inside a solid capacitor, also find out what happens to lithium ion battries in the cold does it's chemistry also gets frozen, why does the phone charge holding capacity drop in winters.
    1
  168. Excellent 👌 keep positive such videos
    1
  169. And GLASS hates Solder ;)
    1
  170. MicroVerrat 😂
    1