But it's true, because if you use 2 such 470/16 classic electrolytics with size 6.3x11mm , with you will find out from any serious manufacturer that no offer 470uF for 16V in this small size exist and starts from size 8x11mm with their max. the pulse current is several hundreds of mA, so how much long this capacitor last if it has to equalize the pulses from the diode at the level of 1-3 Amps 100,000 times per second and maximum recomended temperature is 105°C ? Of course, if you want to really charge something and not use it without any load. My guess is that the capacitor near the diode will dry out (stop working) after 80-200 hours of continuous current draw from the charger of 2Amps. The second one will fail after 200-400 days under the same conditions, and it doesn't matter the manufacturer, even if it is the best brand on the market, they will suffer the same fate, only a little later, especially the one that is heated by the diode to 150 °C or more.
Bloody Hell!! Just when I think USB phone chargers can't get any more dangerous or dodgy, you show us this Chinese fire-starting death maker!! Keep up the great work! You are funny as hell, and doing an important public service at the same time.
I have had MOSFETs running hot enough to get the thin layer on the tin coated backside to melt and still survive. That's means it must have reached like 210-230°C (with the silicon junction being probably like 300°C or something). They will probably not run like that for long though - and it was not on purpose. But, working a lot on messy perf boards, it's easy to get something wrong by accident, get a solder bridge or something like that - which in turn causes excessive current to flow thru the MOSFET or a desaturation fault. In those cases I have also seen a tiny bit of smoke coming and then cut the power fast. But - design a circuit like this on purpose, is insanity, haha. No wonder switching power supplies from china often fails, as they are using underrated components (to save money) and push them to their limits....
I've seen bipolar power transistors that have melted the solder on their pins, fallen out of the circuit board and were still functional. This isn't too unusual in things like audio amplifiers. Over time the silicone oil evaporates from the heat-conductive "paste" between the device and the heatsink and the part runs very hot. Often they do fail, usually short circuit, but they do sometimes survive. I'd never put the part back in the circuit unless it was a real emergency repair and there was no other choice.
I've seen zener diodes desoldering themselves without failure. Actually they were not desoldering themselves because they were held in place with silicone snot, but the solder was melted. It was a bodge to reduce the input voltage of a 7824 regluator below its maximum range from 48V. Someone decided to do it with a bunch of series zeners, and they encapsulated them in silicone to insulate them from nearby components. It might have been OK (possibly) without the silicone, but the silicone added too much thermal resistance and the diodes were cooking themselves with the solder fully melted on their leads. And this worked for years in 24/7 without failure!
Well, on the plus side they can save on the shrink wrap machine at the factory. Just power it up and the heat will make the wrap shrink right down on there.
This never gets boring. That second one must have been the worst so far. But the diode and electrolytic capacitor next to it, was also out of the ordinary 🤣
Love how they printed a zig-zag shape into the PCB "fuse" on the 2nd unit as though that would help ;). Would have have better to simply print a narrower, straight trace. The transformer is one of the worst you've shown on the channel and could kill someone. I'm constantly surprised that we don't hear about more electric shocks from such devices. I try to tell the people I know not to buy no-name USB chargers shipped from China, but few seem to care. In fact, I tell them not to buy *any* drop-shipped AC-powered device. Viewers enjoy seeing the bad chargers as a spectacle, but they also want to see good ones in the hopes that they might find the item and buy a handful.
Oh hell yes. I know what I'm watching today. Exciting. I may have started purchasing cheap chargers from thrift shops (and amazing ones) just to reverse engineer them. Valuable skills and for how similar all these switching supplies seem theres some novel control chips out there, and some super simple (and sketchy) but fascinating analog methods. Love the royer oscillators powering some of the sketchy high voltage supplies for cfls etc
@6:40 and several other points of your video - the max power output is always 8 Watts, whatever 'current times voltage combination' one uses with the testload.
13:38 Yeeeesssss! That's a fantastic transformer, look at that quality, I was expecting such an abomination after seeing the design and rest of it! There's absolutely no mains isolation except the lacquer on the wires, which is like 0.05mm thick only, so this is fabulous! I remember when these used to frequent the channel before! This is SUPER DODGY!!!!
I like both the dodgy and the high quality ones. I would really be interested in seeing a teardown of one of the higher quality Chinese manufacturer's ones like Ugreen.
1:08 oh I had an issue with PD unavailable. MacBook Pro accepts PD and QC of my 20w charger, but my old phone refused to charge from a macbook brick A charger isn't dodgy tho, but i think the problem was in my old phone
Man you have one very sarcastic cat. 😁 Who did it learn that from and his written English and grammar is excellent. 🤭 *Thank You* so much for these videos. While I have no idea what I am doing I went and purchased some of the basic test tools similar to yours so I could do basic testing to gauge how extra dangerous this chineseium crap is. The results of your _testing videos_ scared the crap out of me and I make sure my family *never* leave a device charging overnight or left unsupervised when plugged in. While I had avoided purchasing cheapie chargers as best I could I now *never* purchase one online. Obviously that doesn't mean I only buy quality ones since you can't guarantee the quality unless you have high end test gear or you do destructive pull down but it reduces the chances a bit in my favour and hopefully my house won't burn down now so *Thank You* again for that. Really gratefully appreciated 😍 and for your cat 🥰🥰.
I love when the sketchy chargers have a UL recognized component mark (looks like ЯU) on the circuit board. It is a genuine safety certification for North America but on a circuit board like this it only evaluates the fire safety of the board itself, not the electrical or fire safety of the final product.
Your videos are great and have been helping me a lot in studying the SMPS and what is needed to look for making a better SMPS. Trust me I have searched the whole internet and there is no one better than you exploring the SMPS and their designs. I wish it would be good if you can make a course where you will gather all your knowledge about SMPS designing, EMC, PFC will be great for all of the engineers like me. The course can be uploaded on udemy or other platform which will also add to your passive income.
Are there no protection agencies for consumers like 'Underwriters Laboratory' for charging blocks that are blatantly and deliberately incorrectly marked? 'Dodgy'? 153 degrees Celcius....? Thats crazy!
Business and Diplomatic Relationships seems more important than potential life damage on both sides and the damage made in CHINA, cof, ahem...I mean made to the environment....
Both of those chargers have a CE mark, and I'll bet both also have FCC marks, all of which are blatant lies. This kind of garbage usually gets into countries that would normally bar it by means of individuals importing from China. However, Amazon is notorious for "fulfilling" orders for their "marketplace" vendors who sell stuff that fails to meet legal requirements for sale in many countries. I'm Canadian and see lots of stuff on Amazon, shipped from within Canada to the end customer, that is illegal to sell here. I just wrote a review for such a product. I'm a bit surprised Amazon published it given the words I used:: "I believe that the claim the power supply is CE certified is a lie. The same goes for the claim of FCC approval." I once saw a small wooden toy, in a listing on one of the Chinese sites, with a fake FCC mark.Now I have no doubt that the toy wouldn't cause radio frequency interference, but it show just how willing to lie the sellers are.
Of course there are testing agencies like Underwriters Laboratory and others, but their testing approval marks are often faked on those dodgy chargers, and consumers are not gonna look up at the UL database of certified equipment whether the AliExpress phone charger they bought is actually certified. Unscroupulous resellers putting their own brand on the device (at a 200% markup) make looking up a certification of the OEM design next to impossible.
If there’s anything to learn from these videos, just buy the charger brick made by your phone’s manufacturer. Even if it’s a bit more expensive than you would like, you can feel good knowing that it will work as intended and it likely will not explode when you use it.
Totally off topic but I watched your de bunking video about using a MOT to make a blaster that can fry electronics ! its almost up there with "salt".....great work......cheers!
He still hasn't come across a design that is publicly available that lives up to the task, although one can be made very cheaply and only runs from 3v (2x 1.5v AA batteries). Doesn't work at microwaves though, but mid vhf.
I actually had high(er) hopes for that first one after seeing the blue PCB. The second one was a design popular around 10-13 years ago, and from some research and experimentation I did, it's amazing that that two-transistor design can actually deliver several amps without problem and be much safer if they'd just done what would cost a few cents(!) more per unit... but they didn't.
The two-transistor topology was actually good enough for the pre-smartphone era to power a 300mA charging circuit for a 1000mAh (or even less) battery. Those chargers were specified at 5.6V (no load) to 5.2V (rated current) or something like that, and the lithium charge control chip in the phone had no problem dealing with it. Putting a USB jack on a charger like that is not a great idea, and there is definitely no excuse for the bad transformer insulation and the non-class-Y capacitor.
5:23 152 degrees for a rectifying diode?! Bloody hell, that's amazing! That's going to cook the capacitor right next to it! That charger was baking its internals so much, it would probably melt the plastic housing and set your house on fire! Bloody hell - definitely not fit for purpose! Also, that second one doesn't look too good...
And let's not forget: the charger is going to melt itself and set the house on fire, even if you don't try to draw the full rated load. This makes things even worse than it already is.
Please, could you do a video summarizing the “Nice” and “OK” chargers still available on the market? Possibly for instance, IKEA, BASEUS, and others, possibly bought thru sites Ama$$$, eB$$, Al#Ex$$$$s, etc? It is always nice/fun to see how (super) “dodgy” some products can be, but living in Brazil 🇧🇷 or outside major (USA/European) markets, we are limited to websites selling “famous” and “NoName” (fake) brands that we cannot correlate with most of your reviews. Thank you for sharing your videos & findings!
its a great site and work you are doig, I would love to know an answer to a question, I have heard many electricians disagree with plug socket testers in the UK, how can I know which one is right?
solo paso por aqui viendo videos, ese cargador lo tengo de hace tiempo, pero el mio tiene tambien usbC y lo uso con un cable triple asometech 3 in 1y no he tenido problema, se calienta? si, depende que tanto cargas uno tras otro y funciona bien en mi redmagic 8s pro para no usar demaciada carga rapida con el original
12:40 burst mode in self oscillating flyback reduces switching loss at medium load, because without bursts it increases switching frequency significantly (because self oscillating flyback cant enter from ccm to dcm, afrer core demagnetization done it turns on immediately). Feedback loop only reduces peak on-time current mixing some voltage from optocoupler to the base of current sense transistor. This leads to an increase in switching frequency, increases switching losses. Very often the heating of the switching transistor in such power supply is absolutely the same at medium and maximum loads. But burst mode on medium load is poor design anyway (result of feedback loop simplification).
Great video. I'm sick and tired of the amount of cheap (and sometimes dangerous), but also wasteful crap that's on the market these days. And it's often from China or has cheap, unreliable components sourced from China (cheaply made capacitors are a common cause of failed electronic devices). Governments should be imposing strict standards and testing on such imports but they aren't. Big resellers like Amazon and Ebay should take a stance and not sell them, but they won't because ....... money. Note that China is of course capable of making good quality components and devices, but a lot of their stuff is made to the cheapest price point and that is why it fails.
YES! we got to see a bloody Super Dodgy charger! we just gotta love shocking hazardous ultra scamming chargers with the printed fuses, burning diodes and melting transformers in consumer products getting exposed on your channel, woooo
Hey there! Why wouldn't you try to design and implement a safe flyback converter, that would be fun and educational Love to watch your videos❤ Keep it up
Ďakujem za toto video, je zaujímavé, čo všetko dokážu tí číňania vyrobiť a predávať, najmä ten druhý zdroj bol katastrofa. Ale aby som nebol nespravodlivý, nie všetky čínske výrobky sú takéto, ako som sa mohol presvedčiť napríklad pri jednom z tvojích predchádzajúcich videí, kde si ukazoval relatívne slušné nabíjačky. Len by som ťa chcel upozorniť, že predtým než by som chytil tú dosku (po vytiahnutí zo zásuvky) za primárnu časť (vo videu som videl, že hneď po vytiahnutí zo zásuvky ju takto berieš do ruky), kde je usmernené sieťové napätie, by som sa radšej predtým multimetrom presvedčil, či nie je ešte ten primárny kondenzátor nabitý, aby ťa to náhodou niekedy nekoplo, predsa len opatrnosti nie je nikdy dosť.
I use the super dodgy 1$ "chargers" to power my less demanding electronics (e.g. esp8266) behind a 1117 voltage regulator. Works fine 24/7. It would be great if you could test the tripping current of the fusable resistor and printed fuse.
I believe it is relatively ok but the fire hazard is still there. Just don't use it for anything with exposed metal or expensive things in case it fails.
At this point it's better to diy one. Just a few transistors resistors and a transformer, so your esp uses mains Or rewind the transformer and put Y1 cap
Well, if you use rubber gloves with insulation up to 500V, then there will never be a problem, otherwise I recommend mentally preparing yourself before each touch for the output, that one fine day you will get a nice hit :)
Not long after Apple started making their little cube chargers I saw some investigations of the the copies and counterfeits. They were uniformly horrendous as both shock and fire hazards. The Apple products are feats of engineering. It is far from a trivial task to do a good job of something like those cubes.
I one of those USB chargers that was checked last and I must say it was not very good to charge my phone like he said "Dodgy ...." and "bloody hell ....." 🤣🤣. By the way, why do they use wires in parallel on the transformer ? do the manufacturers actually run out of money for proper solid winding wires? Bloody hell ..........
Partially can be cheaper and easier to wind stranded wire then thick one and better fit on small transformer . Also can be something to do with high frequency switching and interference maybe.
Using multiple conductors in parallel actually makes the winding and termination more difficult to do. It is done to reduce high-frequency losses due to "skin effect." You can find lots of info on skin effect on the web. Each strand must be individually insulated. The "ultimate" in electrically paralleled conductors is litz wire. It may use a combination of enamel and fibre (e.g. cotton) insulation. The strands aren't physically parallel but carefully arranged.
“Poor electrolytic capacitor!”. That killed me man.
No laughing matter on poor capacitor
But it's true, because if you use 2 such 470/16 classic electrolytics with size 6.3x11mm , with you will find out from any serious manufacturer that no offer 470uF for 16V in this small size exist and starts from size 8x11mm with their max. the pulse current is several hundreds of mA, so how much long this capacitor last if it has to equalize the pulses from the diode at the level of 1-3 Amps 100,000 times per second and maximum recomended temperature is 105°C ?
Of course, if you want to really charge something and not use it without any load.
My guess is that the capacitor near the diode will dry out (stop working) after 80-200 hours of continuous current draw from the charger of 2Amps.
The second one will fail after 200-400 days under the same conditions, and it doesn't matter the manufacturer, even if it is the best brand on the market, they will suffer the same fate, only a little later, especially the one that is heated by the diode to 150 °C or more.
Exactly ... And part "the chip is just 140 degree Celsius .... "Juuust" 😃 was another funny part
@@Geniusinventor Yeah that ain't fun
I’m super impressed with that diode at 150+! None of that derate crap, that is a full send right there🔥
That'd get a super dodgyyyyy if I were Daniel, haha!
5:20 "Diode gone wild" - *_LITERALLY_* 😂
Bloody Hell!! Just when I think USB phone chargers can't get any more dangerous or dodgy, you show us this Chinese fire-starting death maker!! Keep up the great work! You are funny as hell, and doing an important public service at the same time.
if the video is without "bloody hell" such video is non existing - this one was well above the average - thank you, as usual you made my day ;-)
That is the highest temperature of a component I have ever seen that was still functional
Agreed. 153C... it is dumb luck that it didn't fail.
6:44 even higher there
I have had MOSFETs running hot enough to get the thin layer on the tin coated backside to melt and still survive. That's means it must have reached like 210-230°C (with the silicon junction being probably like 300°C or something). They will probably not run like that for long though - and it was not on purpose.
But, working a lot on messy perf boards, it's easy to get something wrong by accident, get a solder bridge or something like that - which in turn causes excessive current to flow thru the MOSFET or a desaturation fault. In those cases I have also seen a tiny bit of smoke coming and then cut the power fast.
But - design a circuit like this on purpose, is insanity, haha. No wonder switching power supplies from china often fails, as they are using underrated components (to save money) and push them to their limits....
I've seen bipolar power transistors that have melted the solder on their pins, fallen out of the circuit board and were still functional. This isn't too unusual in things like audio amplifiers. Over time the silicone oil evaporates from the heat-conductive "paste" between the device and the heatsink and the part runs very hot. Often they do fail, usually short circuit, but they do sometimes survive. I'd never put the part back in the circuit unless it was a real emergency repair and there was no other choice.
I've seen zener diodes desoldering themselves without failure. Actually they were not desoldering themselves because they were held in place with silicone snot, but the solder was melted. It was a bodge to reduce the input voltage of a 7824 regluator below its maximum range from 48V. Someone decided to do it with a bunch of series zeners, and they encapsulated them in silicone to insulate them from nearby components. It might have been OK (possibly) without the silicone, but the silicone added too much thermal resistance and the diodes were cooking themselves with the solder fully melted on their leads. And this worked for years in 24/7 without failure!
You need a new category above Super Dodgy.
Ultra Dodgy?
Mega Dodgy?
Maybe you can create a vote...
What a good camera quality . thank you for your improved picturing and filming technology .
Well, on the plus side they can save on the shrink wrap machine at the factory. Just power it up and the heat will make the wrap shrink right down on there.
This never gets boring.
That second one must have been the worst so far. But the diode and electrolytic capacitor next to it, was also out of the ordinary 🤣
Happy 🎉
That diode placement is actually common in these crappy chargers..
There was one that was worse than this one, with a capacitor rated for 2.5V on a 5V output, as well as a capacitor soldered the wrong way :D
@@TheSpotify95 🤣 I have probably missed that one
you buy a power supply and gets an electric grill... bloody hell... 🤣🤣🤣🤣
Love how they printed a zig-zag shape into the PCB "fuse" on the 2nd unit as though that would help ;). Would have have better to simply print a narrower, straight trace. The transformer is one of the worst you've shown on the channel and could kill someone.
I'm constantly surprised that we don't hear about more electric shocks from such devices. I try to tell the people I know not to buy no-name USB chargers shipped from China, but few seem to care. In fact, I tell them not to buy *any* drop-shipped AC-powered device.
Viewers enjoy seeing the bad chargers as a spectacle, but they also want to see good ones in the hopes that they might find the item and buy a handful.
We do hear: "A kid was killed when playing a tablet being charged."
I had to explain to people how it happens. Not to ground themselves.
@@sergepetrov8598 It doesn't happen more often simply because most people aren't grounded most of the time.
Oh hell yes. I know what I'm watching today. Exciting. I may have started purchasing cheap chargers from thrift shops (and amazing ones) just to reverse engineer them. Valuable skills and for how similar all these switching supplies seem theres some novel control chips out there, and some super simple (and sketchy) but fascinating analog methods. Love the royer oscillators powering some of the sketchy high voltage supplies for cfls etc
@6:40 and several other points of your video - the max power output is always 8 Watts, whatever 'current times voltage combination' one uses with the testload.
Amaziiiiing! Still waiting for a proper >500W SMPS. Thank you for your videos full of information!
9:17 so the conclusion is ... DODDGGGGYYYYY!!!
.
cracked me up lol!
This silicon is perfect for next Parker probe to explore sun ☀️😂
You are very brave, holding those chargers with your bare hands 😂
Jaa endlich ein neues Video von Gonwild👍👍👍👍👍😁😁😁
Thanks for the video, I enjoy seeing disassembly and analyzing its interior.
Finally, you roasted some real deal dodgyyyyyy stuff! I've been missing it.
13:38 Yeeeesssss! That's a fantastic transformer, look at that quality, I was expecting such an abomination after seeing the design and rest of it!
There's absolutely no mains isolation except the lacquer on the wires, which is like 0.05mm thick only, so this is fabulous! I remember when these used to frequent the channel before!
This is SUPER DODGY!!!!
"Let's try to open it somehow" *whips out saw*
I like teardown SMPS and bigger and more complicated one
I learn much from you and I'm so greatful
I like both the dodgy and the high quality ones. I would really be interested in seeing a teardown of one of the higher quality Chinese manufacturer's ones like Ugreen.
1:08 oh I had an issue with PD unavailable. MacBook Pro accepts PD and QC of my 20w charger, but my old phone refused to charge from a macbook brick
A charger isn't dodgy tho, but i think the problem was in my old phone
11:42 Best kočka on the internet. Nice!
Another great vid. God bless you Dany! ☺🙏
Danyk, you are the best!
Lovely super dodgy is back!!!!!! Thumbs up 👍👍👍👍😎
"its 153 degrees warm, bloody hell". Prodigy "Firestarter" entered the room.
The fact he left the plastic on them 😂
can you tell me what did you use for thermal camera? brand and type?
Man you have one very sarcastic cat. 😁 Who did it learn that from and his written English and grammar is excellent. 🤭
*Thank You* so much for these videos. While I have no idea what I am doing I went and purchased some of the basic test tools similar to yours so I could do basic testing to gauge how extra dangerous this chineseium crap is. The results of your _testing videos_ scared the crap out of me and I make sure my family *never* leave a device charging overnight or left unsupervised when plugged in. While I had avoided purchasing cheapie chargers as best I could I now *never* purchase one online. Obviously that doesn't mean I only buy quality ones since you can't guarantee the quality unless you have high end test gear or you do destructive pull down but it reduces the chances a bit in my favour and hopefully my house won't burn down now so *Thank You* again for that. Really gratefully appreciated 😍 and for your cat 🥰🥰.
Video Title should be
"Charger gone wild".
Nice video buddy 👍
I love when the sketchy chargers have a UL recognized component mark (looks like ЯU) on the circuit board. It is a genuine safety certification for North America but on a circuit board like this it only evaluates the fire safety of the board itself, not the electrical or fire safety of the final product.
AWESOME MY FRIEND
Your videos are great and have been helping me a lot in studying the SMPS and what is needed to look for making a better SMPS. Trust me I have searched the whole internet and there is no one better than you exploring the SMPS and their designs. I wish it would be good if you can make a course where you will gather all your knowledge about SMPS designing, EMC, PFC will be great for all of the engineers like me. The course can be uploaded on udemy or other platform which will also add to your passive income.
"Bloody Hell........."
Im sure they get away with selling this stuff because they assume no one will ever actually take it to bits.😂👍
Thanks! Ultra dodgy!
The same one that overrides planned obsolescence by rewriting the charging software in the phone. Got it.
Are there no protection agencies for consumers like 'Underwriters Laboratory' for charging blocks that are blatantly and deliberately incorrectly marked? 'Dodgy'? 153 degrees Celcius....? Thats crazy!
Business and Diplomatic Relationships seems more important than potential life damage on both sides and the damage made in CHINA, cof, ahem...I mean made to the environment....
Both of those chargers have a CE mark, and I'll bet both also have FCC marks, all of which are blatant lies.
This kind of garbage usually gets into countries that would normally bar it by means of individuals importing from China. However, Amazon is notorious for "fulfilling" orders for their "marketplace" vendors who sell stuff that fails to meet legal requirements for sale in many countries. I'm Canadian and see lots of stuff on Amazon, shipped from within Canada to the end customer, that is illegal to sell here. I just wrote a review for such a product. I'm a bit surprised Amazon published it given the words I used::
"I believe that the claim the power supply is CE certified is a lie. The same goes for the claim of FCC approval."
I once saw a small wooden toy, in a listing on one of the Chinese sites, with a fake FCC mark.Now I have no doubt that the toy wouldn't cause radio frequency interference, but it show just how willing to lie the sellers are.
Of course there are testing agencies like Underwriters Laboratory and others, but their testing approval marks are often faked on those dodgy chargers, and consumers are not gonna look up at the UL database of certified equipment whether the AliExpress phone charger they bought is actually certified. Unscroupulous resellers putting their own brand on the device (at a 200% markup) make looking up a certification of the OEM design next to impossible.
If there’s anything to learn from these videos, just buy the charger brick made by your phone’s manufacturer. Even if it’s a bit more expensive than you would like, you can feel good knowing that it will work as intended and it likely will not explode when you use it.
Why i advice people (incl my family) to buy chargers which are a bit expensive and from trusted brads.
If they still used leaded solder, that diode would be close to desoldering itself.
Just visited your website Daniel. Well done. 👍
Totally off topic but I watched your de bunking video about using a MOT to make a blaster that can fry electronics ! its almost up there with "salt".....great work......cheers!
He still hasn't come across a design that is publicly available that lives up to the task, although one can be made very cheaply and only runs from 3v (2x 1.5v AA batteries). Doesn't work at microwaves though, but mid vhf.
I actually had high(er) hopes for that first one after seeing the blue PCB.
The second one was a design popular around 10-13 years ago, and from some research and experimentation I did, it's amazing that that two-transistor design can actually deliver several amps without problem and be much safer if they'd just done what would cost a few cents(!) more per unit... but they didn't.
The two-transistor topology was actually good enough for the pre-smartphone era to power a 300mA charging circuit for a 1000mAh (or even less) battery. Those chargers were specified at 5.6V (no load) to 5.2V (rated current) or something like that, and the lithium charge control chip in the phone had no problem dealing with it. Putting a USB jack on a charger like that is not a great idea, and there is definitely no excuse for the bad transformer insulation and the non-class-Y capacitor.
In this episode Diode Gone termal Wilde
Why the secondary diode is getting such hot while loaded? Is that rated for lower current?
Hey DGW I want you to look at some mediocre ones that are neither safe nor dodgy. Just to be different.
"Electrocution house burners" Bwahahahaha! 😆😆😆😆
5:23 152 degrees for a rectifying diode?! Bloody hell, that's amazing! That's going to cook the capacitor right next to it!
That charger was baking its internals so much, it would probably melt the plastic housing and set your house on fire! Bloody hell - definitely not fit for purpose!
Also, that second one doesn't look too good...
And let's not forget: the charger is going to melt itself and set the house on fire, even if you don't try to draw the full rated load. This makes things even worse than it already is.
Thanks. This is why I only use OEM chargers for my phones and electronics.
Please, could you do a video summarizing the “Nice” and “OK” chargers still available on the market? Possibly for instance, IKEA, BASEUS, and others, possibly bought thru sites Ama$$$, eB$$, Al#Ex$$$$s, etc?
It is always nice/fun to see how (super) “dodgy” some products can be, but living in Brazil 🇧🇷 or outside major (USA/European) markets, we are limited to websites selling “famous” and “NoName” (fake) brands that we cannot correlate with most of your reviews.
Thank you for sharing your videos & findings!
Hello @DiodeGoneWild, could you please provide additional info about your testing tools (particularly the termocamera and load)?
Thanks in advance!
All covered in previous videos, take a look.
In that first charger, I thought the diod was going to explode. 😬
Diode not gone wild
Your Odysse page is still broken
9:24 My parents bought a charger like this from a chineese shop, plugged their phone in for the night to charge, the charger blew up during the night
The presence of a UL mark on a board with components running at 150C is beyond ironic!
its a great site and work you are doig, I would love to know an answer to a question, I have heard many electricians disagree with plug socket testers in the UK, how can I know which one is right?
solo paso por aqui viendo videos, ese cargador lo tengo de hace tiempo, pero el mio tiene tambien usbC y lo uso con un
cable triple asometech 3 in 1y no he tenido problema, se calienta? si, depende que tanto cargas uno tras otro y funciona
bien en mi redmagic 8s pro para no usar demaciada carga rapida con el original
Take a look at cheap "gan" chargers that are coming up in the chinese market, they are very suspicious...
Seconded!
Quite the ringing! Very unstable circuit for a power supply!
I had some dodgy qc chargers and some failed explosively charging my phone, and the other superheated until it died...
Is that diode made of unobtainium?
It was now, its decayed into fuckedupium
Tell me the model of your thermal camera.
ahoj. dobré video.
Would be interesting to measure the case temperature but sealed back up and air tight for real use test 😮😮
I was designing a charger using similar IC in 2 switch tropology for charging laptop but it's was good to use more advance ics
I'm almost sure the first charger does 18W. On the input side.
Jesus, i had the exact same model as the second one and i electrocuted myself with it...
12:40 burst mode in self oscillating flyback reduces switching loss at medium load, because without bursts it increases switching frequency significantly (because self oscillating flyback cant enter from ccm to dcm, afrer core demagnetization done it turns on immediately). Feedback loop only reduces peak on-time current mixing some voltage from optocoupler to the base of current sense transistor. This leads to an increase in switching frequency, increases switching losses. Very often the heating of the switching transistor in such power supply is absolutely the same at medium and maximum loads. But burst mode on medium load is poor design anyway (result of feedback loop simplification).
Great video. I'm sick and tired of the amount of cheap (and sometimes dangerous), but also wasteful crap that's on the market these days. And it's often from China or has cheap, unreliable components sourced from China (cheaply made capacitors are a common cause of failed electronic devices). Governments should be imposing strict standards and testing on such imports but they aren't. Big resellers like Amazon and Ebay should take a stance and not sell them, but they won't because ....... money.
Note that China is of course capable of making good quality components and devices, but a lot of their stuff is made to the cheapest price point and that is why it fails.
YES! we got to see a bloody Super Dodgy charger! we just gotta love shocking hazardous ultra scamming chargers with the printed fuses, burning diodes and melting transformers in consumer products getting exposed on your channel, woooo
What thermal camera do you use?
Looks to be a P2 Pro from Infiray. I have the same unit.
Yes, InfiRay P2 Pro ;)
Hey there!
Why wouldn't you try to design and implement a safe flyback converter, that would be fun and educational
Love to watch your videos❤
Keep it up
THE SELF BAKING CHARGER 😆😆 SUPER DODGY
Ďakujem za toto video, je zaujímavé, čo všetko dokážu tí číňania vyrobiť a predávať, najmä ten druhý zdroj bol katastrofa. Ale aby som nebol nespravodlivý, nie všetky čínske výrobky sú takéto, ako som sa mohol presvedčiť napríklad pri jednom z tvojích predchádzajúcich videí, kde si ukazoval relatívne slušné nabíjačky. Len by som ťa chcel upozorniť, že predtým než by som chytil tú dosku (po vytiahnutí zo zásuvky) za primárnu časť (vo videu som videl, že hneď po vytiahnutí zo zásuvky ju takto berieš do ruky), kde je usmernené sieťové napätie, by som sa radšej predtým multimetrom presvedčil, či nie je ešte ten primárny kondenzátor nabitý, aby ťa to náhodou niekedy nekoplo, predsa len opatrnosti nie je nikdy dosť.
I use the super dodgy 1$ "chargers" to power my less demanding electronics (e.g. esp8266) behind a 1117 voltage regulator. Works fine 24/7.
It would be great if you could test the tripping current of the fusable resistor and printed fuse.
I believe it is relatively ok but the fire hazard is still there. Just don't use it for anything with exposed metal or expensive things in case it fails.
At this point it's better to diy one. Just a few transistors resistors and a transformer, so your esp uses mains
Or rewind the transformer and put Y1 cap
The charger is 1$. No need for diy. 😁
Bang on I love it ! only a bloody quid as we say in the UK.@@twoina
Well, if you use rubber gloves with insulation up to 500V, then there will never be a problem, otherwise I recommend mentally preparing yourself before each touch for the output, that one fine day you will get a nice hit :)
What usb thermal camera you use?
InfiRay P2Pro
Ch i n a masters of deceit
5:22 wtf was that 153c and its working in that temperature lol 😂😂
That fake recognized component mark on the first one is pretty obvious 🤣
Lately I am interested in dimmers for LED light bulbs, in case you are looking for ideas :-)
Температуру нужно измерять термопарой, а не тепловизором. Тепловизор лишь визуализирует распределение градиента температуры.
SYUPERR DODGYYY!
I want to play a game. Can this charge your phone before it bursts into flames?
I think the second one's transformer is, perhaps, the most dodgy you've ever showed.
Mmmm, delightfully dodgy. Pretty much every clone of the 1A apple EU or US chargers tend to be the worst offenders for some reason.
Not long after Apple started making their little cube chargers I saw some investigations of the the copies and counterfeits. They were uniformly horrendous as both shock and fire hazards. The Apple products are feats of engineering. It is far from a trivial task to do a good job of something like those cubes.
Aconselho usar óleo de banana para abrir esse tipo de carregador, basta duas gotas e ele abri facilmente.
Charger baking the components 😅😂
Bloody hell 😢
заметил один важный недостаток у usb tester Fnirsi гаснет и в перезагруз идёт.
👍👍
Çok güzel bir kedim 🐱varmış o kediyi yavruyken mi aldın çok güzel🌅 gözleri var
Great
I one of those USB chargers that was checked last and I must say it was not very good to charge my phone like he said "Dodgy ...." and "bloody hell ....." 🤣🤣. By the way, why do they use wires in parallel on the transformer ? do the manufacturers actually run out of money for proper solid winding wires? Bloody hell ..........
Partially can be cheaper and easier to wind stranded wire then thick one and better fit on small transformer . Also can be something to do with high frequency switching and interference maybe.
Using multiple conductors in parallel actually makes the winding and termination more difficult to do.
It is done to reduce high-frequency losses due to "skin effect." You can find lots of info on skin effect on the web. Each strand must be individually insulated.
The "ultimate" in electrically paralleled conductors is litz wire. It may use a combination of enamel and fibre (e.g. cotton) insulation. The strands aren't physically parallel but carefully arranged.
Мамкины инженеры снова недоложили деталей.
0:10 so true