How does a modern Power Supply work?! (230V AC to 5/12V DC) DIY Flyback Converter!
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День томуDo you want to know more about the Würth Elektronik components? Then click here: bit.ly/Online_Catalog_EN
Würth Elektronik products, which were used in the video:
- WE-FLEX+ Flexible Transformer for DC/DC Converter (749197131): bit.ly/WE_FLEX_EN
- WE-UOST Universal Offline Standard Transformers (760875112): bit.ly/WE_UOST_1_EN
- WE-UOST Universal Offline Standard Transformers (760875532): bit.ly/WE_UOST_2_EN
- WE-LLCR Resonant Converter (760895731): bit.ly/WE_LLCR_EN
- WE-UNIT Off-Line Transformer (749118105): bit.ly/WE_UNIT_EN
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In this video we will be having a look at the kind of power supplies you use every day. I am talking about switched mode power supplies that convert our 230V AC mains voltage into for example 5V or 12V DC to power our electronics. I will not only tell you all about the heart of such a system, a flyback transformer, but I will also show you how it is used in a flyback circuit. At the end I will also show you a DIY attempt of such a mains power supply that you should (please) not replicate. Let's get started!
Websites which were shown (used) during the video:
www.onsemi.com/pdf/datasheet/...
Thanks to the Würth Elektronik eiSos Group for supporting this video.
Music:
2011 Lookalike by Bartlebeats
0:00 Flyback Transformers in Power Supplies
1:15 Intro
1:33 Flyback Transformer Theory
3:25 Flyback Converter Functional Principle
5:58 Practical Flyback Converter Circuit
8:13 DIY 230V AC Flyback Converter (SMPS)
@realdragon 2 роки тому
Wurth Elektronik: Do your best Great Scott: *Cuts transformer in half*
@robert_g_fbg 2 роки тому
DIY == Destroy It Yourself 💥
@legominimovieproductions 2 роки тому
Flextape can't fix that XD
@reb_game 2 роки тому
ukposts.info/have/v-deo/kaR6Zm9rmqB8rpc.html
@jainvibhore1997 2 роки тому
"Do not build this circuit! With that being said, here's the schematic" -Great Scott XDD
@greatscottlab 2 роки тому
Everyone should have the access to knowledge ;-) But a warning was still necessary ;-)
@Paul_EEB 2 роки тому
It is not a bad circuit to build. It just missing parts that make it a compete power supply unit, and it should not be used as a power supply.
@oraszuletik 2 роки тому
Dodgy! 😉
@tvishmaychoudhary69 2 роки тому
@@oraszuletikDIODE GONE WILD!!
@VijayaLakshmi19807 2 роки тому
@@greatscottlab Hi sir. Sir please hack an AR glasses to work on a HDMI input even if the whole setup becomes bulkey. Bigg fan. Love from India ❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️
@thebamplayer 2 роки тому
Can you make a video about active power factor correction, because it's an important topic with switch mode power supplies. Due to it's big capacitors.
@greatscottlab 2 роки тому
It is on my to do list :-)
@user-qf6yt3id3w 2 роки тому
Active PFC is fascinating. I think it's just using PWM to draw a sinusoidal current so the current is in phase with the voltage but there might be some more clever stuff going on. What would be interesting would be to use a microcontroller to do sinusoidal PWN synchronized to a zero crossing detector and see if that performs as well as a commercial APFC chip. I suspect the commercial chip is doing something a bit cleverer than this but it's not well documented. Basically a 'Buy of Build' for active power factor correction.
@axelBr1 2 роки тому
About 10 years ago I had to simulate an oil refinery electrical power grid. Was a struggle trying to understand how a generator's AVR goes from changing the generator's voltage when it's the only generator on the grid to changing the reactive power supplied when there is more than one generator.
@sulochanakharat9033 2 роки тому
@@greatscottlab sir please make vedio on "how to use lab bench power supply basic to professionally"🙏🙏🙏 (I request you)
@user-qf6yt3id3w 2 роки тому
@@greatscottlab Awesome! Looking forward to it.I don't suppose you know any good discussions of Actice Power Factor Control algorithms?
@inothome 2 роки тому
Great video as always!!! Ignore the YT analytics, if they still show poor results. It's not you, it's them and please don't change your style to try and appease the algorithm. . We're all here for the quality of videos you have always done and this is a perfect example.
@greatscottlab 2 роки тому
Well said! Do not worry. I will keep making such videos as long as I can ;-)
@WarriorRev6300 2 роки тому
Those waste fake yt videos with crazy thumbnails are making it to yt algorithm.
@nickwallette6201 2 роки тому
I would love it if content creators banded together and created a wash of "Shorts" that were titled "do not watch this - nobody asked for it, nobody wants it, this is a waste of time." 30 seconds of vertical video paint drying, grass growing, and similar pointlessness. When the viewing stats are complete garbage, maybe YT can butt out of trying to dictate content.
@ihatemicrosoftsobadly3188 Рік тому
Already suggested your channel to all my nerd friends :) great videos. Keep up the great work!
@melchiortod29 2 роки тому
That's like marketing to the next level! Love that!
@greatscottlab 2 роки тому
Well, I wanted to do a video about SMPS and they wanted to show off their transformers.....I would say that is a good match ;-)
@analoghardwaretops3976 2 роки тому
.." this is not a promotional pitch..but in all fairness I can say this ( though we were really small customers ) Wurth Elektronik do have " high quality & reliable components and are real serious business partners... despite we using a limited range and quantity of their products...they went " all out " to respond to our doubts/queries/ end use applications..and sent their team over with substantial dev. kits/ catalogues etc. besides follow ups..
@nickwallette6201 2 роки тому
I am ALL FOR THIS. I have a pet project I'm trying to learn up to... I've got a shelf full of game consoles from the Famicom to PS4 Pro. I want to install a high-power 24VDC supply and use isolated switchmode supplies to step down to what each machine needs... 3.3V, 5V, 7-9V, 12V, and so on. (Isolated to prevent ground loops and issues with systems that raise "ground" to a diode drop above one leg of the input jack, like the NES.) In my research, I've seen planar transformers that use stacked PCB layers to provide galvanic isolation. Since the design is kind of tricky, they're also available as drop-in modules from trafo manufacturers. But, magnetics selection is non-trivial, and I still feel completely lost on this topic. It's really the last domino to fall before I can start building some POC designs. So, please! MOAR TRAFOS!
@fuadmammadzade1213 2 роки тому
Wow, I have watched dozens of videos about SMPS before, but this one really made the subject to click.
@greatscottlab 2 роки тому
Brilliant :-)
@sumitkumar12 2 роки тому
So true, this was the best explanation
@chuckthebull 2 роки тому
I have been fixing these for years by changing some of the caps..I had a good idea how they worked and you defiantly boosted my understanding of them even further... lots went into the design technically.. thanks
@TopDedCenter 2 роки тому
Looking forward to more videos about this. I've been trying to fix a switch mode power supply for a KORG keyboard and my knowledge in the feedback loop is very limited. This video has been a huge help and i think I'll take another look at repairing it after your next video.
@SFInspector2211 Рік тому
I kept looking at my phone because your background music sounds like one of my ringers. LOL
@MrJugsstein 2 роки тому
I'm coming to electronics later on in life. Your tutorial have to be the clearest and most well explained. Really enjoy and get so much from your videos. Thanks for your time.
@greatscottlab 2 роки тому
Glad it was helpful!
@L2-Lagrange 8 місяців тому
8:56 what an absolute madlad lmao. Props man
@NoobHuman 2 роки тому
Thanks Würth elektronik for us to learn more about Switch mode power supplies!
@thatoneguy99100 2 роки тому
I really love Würth Elektronik's products, and I love them even more for sponsoring you!
@MrTacoSr 2 роки тому
sometimes I have to rewatch these videos because I get so caught up in him writing and labeling so perfectly with no mistakes
@philipatkinson1532 2 роки тому
Thank you. I have a big box of these I bought eBay as a mixed bag for £1 ages ago and having tested the coils resistances was puzzled. The box remains! I will try testing them with low voltage at 60kHz Might be more informative. Very good explanation. I vaguely knew how they worked. Now I know more :)
@gabrieldai88 2 роки тому
1:02 ElectroBoom is proud
@edoardocastellaneta271 2 роки тому
hi, great video as always. just keep in mind that in case of flyback topology, we aren't really talking about a transformer: since there is a high reluctance gap, a flyback trasformer is more like two mutual inducitors with a very high coupling coefficient.
@kelvin1316 2 роки тому
Me: "hmm yes, I see" My mate: "you have no idea what's he is talking about do you?!" Me: "nope he lost me at 'reluctance gap'!" Hehe 😇 💚
@Henry-fv3bc 2 роки тому
Meh most would still consider that a transformer. RF transformers can be completely air core and we still call them transformers.
@edoardocastellaneta271 2 роки тому
@Joseph Bunn great explanation, thanks!
@patstine2741 2 роки тому
Video includes FULL BRIDGE RECTIFIER 10/10
@DonkenAndToivolaRR 2 роки тому
Just can't wait for the video on the TL431. I'd love to see, how I could use it, to regulate the output of a dc-dc converter (which aren't so different from smps). For example to battery power a microcontroller based temperature logger.
@twistedshadowsaf 2 роки тому
This makes understanding those circuits I copied down from circuits I worked with before alot easier..
@williamcraig6377 2 роки тому
Excellant explanation to a topic I have been wanting to understand for years. Yes, please cover the topic of voltage references. You are my inspiration to build electronics.
@greatscottlab 2 роки тому
Glad I could help :-) I hope I will get to this video soon.
@sahilsingh1 2 роки тому
Amazing video. I always wondered how usbc PD is able to achieve different voltages, and this video is the answer - PWM with different duty cycles.
@FINALASTXTN 2 роки тому
Finnally somebody goodly explained a flyback converter
@greatscottlab 2 роки тому
You're welcome :-)
@johnathanasiou9284 2 роки тому
Looking forward to follow-up videos on TL431 & the switcher IC also. A trick I had picked up from Haseeb Electronics to troubleshoot faulty optocouplers in SMPS is to use a diode on the output of the opto, which helps isolate any feedback circuit issues
@IrishSkruffles 2 роки тому
Hi, could you explain a bit more about adding a diode to the opto output? How does that help to diagnose an issue? I work with SMPS sometimes so it'd be great to learn a new way to find problems :)
@hobbyelectronics2121 2 роки тому
The best description of flyback transformers ever :)
@wgm-en2gx 2 роки тому
As always well presented. Someone below asked about PF correction. Along with that, maybe do a video that turns this into a true power supply with PF correction, filtering, in rush limiting and isolation. That would be an interesting follow up !
@greatscottlab 2 роки тому
Thanks for the feedback :-) Let's see what I can do
@LimbaZero 2 роки тому
I usually use bare wire to do these prototyping circuits. Saves some solder and less headache of solder bridges.
@thetrcg 2 роки тому
Thanks for the great content! Always wanted to know how power supplies worked and now I know, I think
@ToniPlays_ 2 роки тому
It's nice to understand how these things work. Sounds complicated but really isn't. Also preparing my moped project for 1.6kw charger integration. So exciting stuff. Great Scott!!
@greatscottlab 2 роки тому
You can do it!
@Richie_ 8 місяців тому
I'm still learning and haven't used AC yet. I got a 220v - 9v AC to try the AD-DC circuit when confident enough.
@David-zu5tp 2 роки тому
9:24 Full Bridge rectifaiaa Good job GreatScott!!
@greatscottlab 2 роки тому
Thanks :-)
@ThriftyToolShed 2 роки тому
Great video! Thanks for all the work you put into this.
@alext5310 2 роки тому
Nice, something interesting to watch while waiting for the F1 GP to start, haha
@InterFelix 2 роки тому
Exactly...
@JSPHism 2 роки тому
I already lost hope lmao I honestly want to see a good race without rain
@SERAFINARODRIGUES 2 роки тому
Same here hshshshshsh
@analoghardwaretops3976 2 роки тому
Yes in this demo it was built without any " soft start ".. unlike the G.P. races that can Never begin with a soft start 😂😂😂
@johnemanuel5593 2 роки тому
Clearly understood.... It was too hard to understand about smps.... Thank you it was helpful... 😊😊😊
@oneRella 6 місяців тому
I love your videos but I wish you had longer versions with more in depth explanations so that idiots like me could keep up.
@NilsRohwer 2 роки тому
Fascinating, I'm very happy to have this video from you. I have wondered about Switching mode power supplies for ages, and to have such detail is great - to be fair, I'm 1:03 in, but I know it'll be good. Edit: I was not disappointed! Thanks.
@greatscottlab 2 роки тому
Glad it was helpful!
@The-Master-of-None 2 роки тому
When Scott says "RIGHT?" The answer is "NO". Great content as always! Thanks for sharing your knowledge.
@GeertGoossens 2 роки тому
well despite the fact I know how a SMPS works in theory, I didn't know about the specifics about the transformer windings being opposite and the fact it's basically using the charge / discharge of such transformer... I always thought it was due to high frequency switching that it worked like a regular transformer but was just smaller because of the higher frequencies and the square wave... :)
@greatscottlab 2 роки тому
The more you know ;-)
@analoghardwaretops3976 2 роки тому
....windings being opposite... is for " flyback " mode only...also duty cycle cannot/ should not exceed 50%...
@ShinyMajor 2 роки тому
@@analoghardwaretops3976 The flyback can go to as high of a duty cycle as you like within the practical limits of maintaining control, as long as the switching transistor can handle the reflected voltage. I think you're thinking of the forward converter, which is one where you can't exceed 50% with the standard design
@analoghardwaretops3976 2 роки тому
@@ShinyMajor exceeding 50% , the volt/ sec. balance in off- to -on may not be achieved..and can lead to core saturation even in boost/ flyback modes.. leading to gradual residual flux buildup... so when it's @ the extreme limit of the hysterisis curve..the next turn on pulse ..in its first few hundreds of nanosecs.can destroy the sw. with uncontrollable current.. Chips for flybk./ boost have an internal divide by 2 f/f to limit max. duty to 50 % .. example..compare data sheet for internal blk.dia. of 3842/43 or other..
@ucandiy1898 2 роки тому
Great work! One of the best channels on UKposts!
@greatscottlab 2 роки тому
Thanks :-)
@Slushee 2 роки тому
I love this! I have always wanted to make a switching power supply. My next big project is going to be one of these thanks to you. Wish me luck!
@greatscottlab 2 роки тому
Be careful though
@Slushee 2 роки тому
@@greatscottlab Yes! I watch DiodeGoneWild, and my intention is to make the most absudly safe power supply ever built. If you know who he is, he always critiques PSUs for missing safety features and such. Not going to miss any of those. I will be using overkill air gaps and components, and cables too thick. Thanks for the reminder though!
@brucewilliams6292 2 роки тому
Great video. I love learning about electronics and your explanations are very good.
@linuswulff03 2 роки тому
Thank you! I've been wanting to learn more about flyback converters recently!
@greatscottlab 2 роки тому
Glad I could help!
@LabArlyn 2 роки тому
I was also looking for an SMPS tutorial, glad I could find this video.
@samim6523 2 роки тому
I am helping with UKposts algorithm, I am watching again and again. LOVE YOUR CONTENT
@greatscottlab 2 роки тому
Thanks for the help :-)
@samim6523 2 роки тому
@@greatscottlab my pleasure
@keyem4504 2 роки тому
That's a type of video I like a lot. Lots of stuff to learn. Thank you.
@mohammadrezamim272 2 роки тому
Best channel in this topic is DiodeGoneWild.
@vidulabeywickrama7852 2 роки тому
U really deserve more sponsors.
@johnathanasiou9284 2 роки тому
Awesome video GreatScott!. To help newbies who may not be always fully aware of how oscilloscope measurements should be approached especially with mains connected circuits, can you please do a follow-up video showing exactly how you had connected all devices, especially the isolation transformer & scope ground leads. If you can also demonstrate scope differential probes in such situations, this would be super
@greatscottlab 2 роки тому
I did a video about how to use an oscilloscope properly. There all those things are explained.
@pierreretief 2 роки тому
Please build a switch mode power supply with all those features you spoke about, the inrush current protection and such. Would be awesome!
@criticalthinking2603 2 роки тому
Thank you. More videos like this are welcome.
@swapnilbandgar8730 2 роки тому
I m following last 2-3 years... and learn a lot from every video... also tried many circuits... please make next video on TL431...
@greatscottlab 2 роки тому
Thanks for watching :-) I hope I will get to the TL431 video soon.
@gendragongfly 2 роки тому
Great video, there aren't many video's about propper modern powersupplies out there on UKposts and reading about the subject tends to get complicated fast 😁
@greatscottlab 2 роки тому
Glad it was helpful!
@robertwillemsen368 2 роки тому
Thank you. Nice and clear explanation!
@AnilChoudhary244 2 роки тому
From all of your video, this is the first video which i felt has less content and knowledge. I think it can get more informative... Apart from this, i love your video, always get something to learn.... Thank you sir.... ☺
@MCsCreations 2 роки тому
Pretty interesting! Thanks a lot, dude! 😃 Stay safe and creative there! 🖖😊
@midnightgadget3459 2 роки тому
At least half of that went over my head. That being said, i was really interested to see whats inside, and how all my 12V DC adaptor power supplies that i use for various projects actually work. Out of curiosity, i would love to see in your opinion what a basic VS a well engineered design would look like for one of these circuits. Would be a nice reference if i ever get curious enough to open some and see if they are high quality units or cheap and nasty. Thanks for the video :P
@greatscottlab 2 роки тому
Thanks for the feedback :-) I will see what I can do ;-)
@laboratoryoperationsmanage5079 6 місяців тому
Most of that went over my head, too...
@koushikb8128 2 роки тому
He said full-bridge rectifier @Electroboom
@electronic7979 2 роки тому
Very helpful video. I liked it 👏
@SkyhawkSteve 2 роки тому
It might be a good experiment to build the same circuit on copper-clad board with a good ground plane. That should cut down a lot of the ringing at the switching transitions. This sort of ringing is what causes a lot of the EMI in switching regulators.
@sdlion7287 2 роки тому
a good ground plane needs to be on a separate copper layer? or just having more area (on the same side) is enough? (with those other design considerations, but I want to know how important are ground planes on independent copper layers)
@SkyhawkSteve 2 роки тому
@@johndododoe1411 I don't think so. I've spent years troubleshooting EMC problems, and ringing in switchers is a classic issue.
@sauritinfo2248 2 роки тому
Great, I was looking for this topic from may days.thanks to German friend from India. 😀😀😀
@TechBuild 2 роки тому
Press F for the poor transformers. Great video by the way!
@greatscottlab 2 роки тому
Thanks!
@semphony100 2 роки тому
Thanks a lot scot that subject is much clear to me now
@electromatic2014 2 роки тому
Stay creative , and I will see you next time. Always brings a smile to me, great video as always, only getting better and better
@greatscottlab 2 роки тому
Thank you! Cheers!
@my3dprintedlife 2 роки тому
For learning purposes only, smart!
@lpt2606 2 роки тому
Very informative 👏 thanks
@TheUnknownCatWarrior 2 роки тому
UKposts: DIY power supply without explanation Great Scott: *explains everything thoroughly*
@dreamcat4 2 роки тому
thanks for the explanation! a very well done video and it really de mystified these cheaper SMPS designs for me. BTW for a good bridge rectifier Steve SDG Electronics recently did a video and found a pretty good one. Then also add some missing movs and other protections etc. and it is well on the way to become a really nice open source design. That can be adjusted somewhat the specs to suit the needs of the specific usage. Maybe with the extra work it could also be reviewed by one or two other electronics youtubers, to get further feedback and that could be really fun for everybody to participate in. But heh! No need for doing any of that! ...its just a silly idea really. I guess another fun part would be to compare the BoM costs and the overall quality against a commercially sold ones. Like a Meanwell for example. But it would first take some further significant development iterations. Before being able to get to that stage of things
@walterwhite237 2 роки тому
Hi GreatScott i would like to see a a video made by you about PFC system on power supply how they work what happen if they fail. thanks for sharing the knowledge!!!
@susmittayade4643 2 роки тому
Nice video !!! Really loved it!!! Will you make a detailed video how these power electronics produce harmonics in systems and their remedies??
@greatscottlab 2 роки тому
Watch my video about power forms.
@EasyOne 2 роки тому
Very well explained ❤
@greatscottlab 2 роки тому
Thanks a lot 😊
@darshandodal1889 2 роки тому
Just at the right time😍🔥... Eagerly waiting for the next video🔥
@umakanthbojanapalli3240 2 роки тому
Valuable information sir
@dexattech 2 роки тому
Awesome as always ❤️🔥
@uditfand817 2 роки тому
very nicely explained
@DanielsGameVault 2 роки тому
As soon as I saw that fuse popping in the intro I thought "Yup: I'm staying till the end" :)) I was hoping to see what happened. High inrush current most likely, since the main cap is big and there's no NTC to limit it....
@nickwallette6201 2 роки тому
Haha.. I remember building my first AC mains supply. I brought it up on a Variac, and all worked perfectly. After thorough testing, I plugged it into the wall directly, and predictably... I popped it.
@janosgajda5287 2 роки тому
Great content, as always. Looking forward for the TL431 video!
@greatscottlab 2 роки тому
Coming soon!
@stormz4040 2 роки тому
Thank you. Your videos are amazing.
@greatscottlab 2 роки тому
So nice of you
@6935g 2 роки тому
Maybe you could try to build a differential probe in a DIY or Buy episode. They are very expensive yet not too complicated.
@Zebra_Paw 2 роки тому
Actually the voltage dropping at the output is due to the flyback topology. It’s just like a forward of halfbridgd, the output is averaged out, but no need for an output inductor, the transformer does that itself when used in a flyback configuration. But obviously it isn’t a stable voltage, so a flyback loop is needed, and usually it’s made with a voltage reference and an optocoupler for galvanical isolation!
@analoghardwaretops3976 2 роки тому
Flyback/ boost.. as the name implies..is mostly for " boosted" output voltages...I e. volts higher than input level..so current is usually lower ... The boost inductor is in series with the transistor switch...on Input power side .....and "THIS" current is measured...in the control circuitry..,here it's not the " load " current that's being measured..even though that's what we need... However in some critical apps. the freewheeling diode current... ( partly it's some of the of real load current ) is measured and used for control... it involves more mathematical derivation and additional equalising circuitry...
@SudhirKumar-bq4xz 2 роки тому
Man you are my virtual teacher.... ❤️
@greatscottlab 2 роки тому
Happy to help!
@BRUXXUS 2 роки тому
Oooh, this is an exciting one!
@lernenmitrobin 2 роки тому
nice video as usual! maybe you like to talk about LLC (resonant converter) in one of your next videos.
@ansonvattakunnel5297 2 роки тому
"This is super dangerous, don't rebuild it, now here's the schematic " I couldn't stop laughing
@JuanCruzAvila 2 роки тому
Loved it!!
@farabielec 2 роки тому
Thank you dear.
@mirko4757 2 роки тому
Feel like a traitor for missing out on your content lately, you still do an amazing job but I have a long way to become an engineer(like 2 years)
@berberger4814 2 роки тому
smps design is really a interesting topic
@prathameshraikar5428 2 роки тому
😍😍😍great explanation
@dinushkam2444 2 роки тому
Wish you did more videos on switch mode power supply. Anyways great video, keep it up
@greatscottlab 2 роки тому
Maybe there will be more..... ;-)
@ricardoserrano-smith5571 2 роки тому
I definitely agree
@varunrmallya5369 2 роки тому
"..........with that being said here's the schematic."- the reason I love your videos
@heatsingh2205 2 роки тому
That's if you want to build a professional one users descretion is required
@ElektronikelAcoustics 2 роки тому
Really a great video as always 👍👍
@kikihobbyrepair 2 роки тому
Nice informative video as always 😉
@mohali7027 2 роки тому
Thanks for all your videos could you make video about welding inverter system and explain how does it work
@electroumit 2 роки тому
Thank you. Good work.
@greatscottlab 2 роки тому
Thanks :-)
@KillianTwew 2 роки тому
I keep zoning out on your perfect handwriting... You were saying something about fly...
@huhufbez 2 роки тому
🤩🤩 Good work 🔥🔥
@mr.skeleti4038 2 роки тому
Another quality video from the best quality creator on this platform(BTW pls can you make another video using a raspberry pi ?)
@greatscottlab 2 роки тому
Thanks mate :-)
@rinokentie8653 2 роки тому
Very interesting (again) !
@user-hq2zu4nc7g 6 місяців тому
great job
@insoft_uk 2 роки тому
That TL431 sure gets around a lot.
@koukouzee2923 2 роки тому
I started getting into electronics lately and I really like it I want to make a circuit to convert dc (batteries ) to ac for high voltage transformers And I'm really struggling with such simple circuit xD I learned about zvs but it's too complicated for me
GreatScott!
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