@sublexxus79 Me too. I've kept a couple powerbanks, but if there isn't room enough inside to install fuses, it gets torn down for parts. Four 18650 cells can hold a lot of energy, it's just too dangerous.
@@DiodeGoneWild This is not the end ... www.aliexpress.com/item/4000715696803.html?spm=a2g0s.9042311.0.0.3af64c4dhuCUEc The charger is still manufactured and is even marked 3.1A max at 5V. Yesterday I opened the cover and found another pcb design with the same insufficient insulation distance and an equally dangerous transformer, also the circuit of the self-oscillating with 2 tranzistors is almost identical, the charger also has no fuse and noise filter. The rectifier diode is SR160, so this charger is the same as yours.
Very nice Isolation transformer idea made from two step-down transformers, where the first is wired as the normal step down and the second as a step up, limiting current to the size the transformer's capacity. Also great is your cat in your videos, you've got a good assistant there.
DiodeGoneWild I wonder what was all about the ground connection that you were talking about, I didn't get the idea to use those transformers like that. Do you have any video where that is explained? Thank you.
Thank you. I'm just learning how to use an oscilloscope, and my oscilloscope I built from a kit. It's a DS0138, and your setup on the USB charger. Thank you for your incite DIODEGONEWILD. Great name!!!
profound knowledge, enlightening and always very entertaining - well done .. now and then I have to close my eyes as you are so close to the mains with your fingers - I'm sure, you've got a lot of e-shocks in your life (as I did, of course) ;) Your Tesla-Scope is e-tubed, I guess (why not using a 1:10 voltage divider, built in in most of these test probes for Oszilloskopes?) ...thx, always a pleasure to watch your videos
Man, in spite having such a strong accent you're probably more understandable than some natives. And you make good vids too. Some are kinda long but with how you make them they're easy to watch.
@G E T R E K T Sorry? Our teacher was absent and we had multiple tests coming up. Both the book and this video included in the same content. I never learn using books. I’d be the reason they’d exist if I used the book because I’d never learn anything with a book.
The Russians were fans of overbuilding things, because they had almost limitless resources during the Soviet (communist) era. Sadly, they were taking these resources by force from the countries they had occupied, or otherwise forced to join the Union.
And you never should. Communism is impossible to apply in practice, and everyone who tried, failed miserably. It has left a mark on so many people, we would have been better off if communism and dictatorship hadn't existed in this country, but sadly, not everyone understands that.
Great videos! Very useful to not buy dangerous things. I wish you could explain some day about those diodes against each other instead of the snubber network. Still figuring out exactly how they work. Is usually a normal diode + zenner 180v.
16:10 Sometimes a clamp is not needed on the transistor. This mainly has to do with the design of the transformer. But yeah most flyback supplies have a clamp. BTW, sometimes instead of a diode/cap/resistor, I've seen a high voltage TVS diode in it's place, to clamp the voltage.
That electrolytic cap - C H O N G - X Now made with more Nu-Metal in their Industrial Metal foundery where they specialize in Alternative Metals; that's pretty Progressive.
ChengX is not Chinese, it's Taiwanese. And yeah it's an old well-established brand and an "import" thus somewhat coveted in China, but ChengX were never particularly high quality, they are just about the lowest grade of the Taiwanese ones, though China has many brands that are worse and few that are any better. And thus the desire to fake it - there are multiple brands in China that imitate the appearance of the ChengX logo.
Dude i was gonna comment that.But yeah a finger is surely a lot more expensive and you are not able to get another one.So your finger is a treasure and you need it most and a thermal camera..... You don't even need it
Having exact the same chargers bought from gearbest for 2$ but mine is tottaly different inside its full of smds on bottom and just some power components and diodes on top. Isolation is also almost non existent on mine
Yep too many corners cut with that design, 1 amp was optimistic lol. I have seen that 13003 transistor in so many cheap supplys and flourscent bulbs. It must be their favorite and cheapest one to use, and the c945 is very common but quite reliable. Do you think the transformer is to blame for the low current problem, or just the 13003 is not having a heatsink, so the emitter resistor can't be lowered in value slightly. Your cat wants some fuss :-D
1.40 USD including shipping is probably not enough to build a proper 1A charger. The problem may be the transistor or transformer, but it also may be the low capacity of the capacitor at the output and also the low capacity capacitor at the input, which makes the voltage drop too much during zero crossings. The transistor and transformer thing is much more complex. The same transformer core can transform more power if a higher frequency is used, but it requires a faster transistor. Also the windings are important for the power. Higher frequency allows for less turns, thus thicker wire and more power. But also the arrangement of the windings is important. It a split primary is used (half of it below the seconrady and the other half above) the frequency can be higher and also the stray inductance is not that high, so it can handle more power without too much ringing and overshoots. Also a snubber network would help to reduce the stress of the transistor and thus allow for more power.
Thanks again. These Chinese cheapos don’t stop frightening me. I’m glad we have very efficient authority Tukes here in Finland which examines these. It’s sad that those are not mandatory anymore because of EU. There are huge amount of bad power supplies where the safety gap is too small or are causing interferencies. BUT please, be careful with the mains voltage! I hope you have residual current device which understands also pulsating DC. I’ve been doing electronics for over 50 yrs and I felt me slightly worried when you have mains voltage so open. I never hold multimeter leads with two hands when measuring mains voltage and keep the other hand behind my back or in pocket. I want you to continue doing these really fine videos.
thank you for this video, very instructif, please i have a question about that oscillator : how the 4.7nf capacitor is discharged, when primary current stop,of course there is an oposit EMF induced in the auxiliary winding,what is the path of the auxiliary current at this moment.
is it essential that transformer used need to have isolation winding? can a charger be made using 5 v regulating supply using 7805 and a relay to switch off when charging is finished?
If it is powered by mains electricity, then isolation is absolutely necessary. To learn why, you need to learn about the power grid and earthing. There is an excellent video about it by +The Post Apocalyptic Inventor. If you want to charge a phone from 12V or so, then you could use a 7805. It´s not very efficient though. The higher the input voltage for 7805, the lower the efficiency, resulting in more heat. There would be no need for a relay because the phone will stop charging by itself.
As your testing is typically destructive, you could also test the flammability of device's cases. Usually it looks like one last place for a device to fail safety test, if everything else looks good. I have ordered ~5 chargers from china, and none hasn't had flame retardant case.
Prodávaj se normálné u nás v kamených obchodech a eshopech asi za 149kč a u různých vietnamcú je teď zlevnili na 49-79kč. Ta moje má ještě nad usb natíštěno 3,1A což jsem samozřejmě nevěřil a koupil jsem jí ze zvědavosti za těch 49kč a čekal něco mezi 1-2A a dává stěží těch 0,7A. Nemám moc levných věcí na 0,5A tak asi půjde na součástky, USB konektor a modrá LEDka se vždycky hodí. Btw. Krásný zvědavý kocourek ;-)
I simulated this circuit, and it had the exact same ripple and overshoot issues. They didn't even simulate to test if dropping the component values to save money was a good idea...
I have many of them, if you want I can send you some (wall adapters, mainly from china) + failed LED GU10 bulbs. I am curious what failed in them. No need for send back. I am from Slovakia so posting is no problem. I tried to identify failed components in them, without success. :) Maybe with your video I can learn something new.
Thank you very much for explaining how this power supply works. It was the simplest ps I had ever seen. I learned a lot. But Can you explain to me please why a full bridge rectifier isn't used at the secondary (except for the cost cutting issue)? It seems it will double the power. If they use a transformer with a symmetrical 3 wire output, all they need is an extra diode to double the power. Another question. High voltage transitors have very low gains. Except the cost, would it be more efficient to use a MOSFET instead?
I did enjoy the scope photos which are missing from all the other teardowns. If you do another, a shot of the base waveforms would be nice cause I can't convince myself how the R-C L oscillator works. An ON semi MJE13003 has a breakdown of 700 Volts 400 V sustained. Disregarding the bandwidth of a Tesla scope the ringing on the primary looks to be less that the 77.5 volt reflected back from the secondary. More expensive tran snubber network tradeoff?
OK, the next one will be with the base waveforms ;). Without a snubber network, the transistor suffers more stress and so the output power has to be reduced to prevent its failure. The ringing increases the voltage quite a lot, by about 150V.
Hi your videos are always awesome, I'm having two major issues in designing the SMPS, 1. When i overload the supply its voltages drops to some lower voltages, if i change the ferrite transformer with another one of bigger size then this voltage drop is less. My question is how the ferrite transformer affects the voltage drop? 2. also when i put the load its fet starts heating, actually im using it without snubber. My question is deos the snubber affects the heating problem of FET? Answer will be highly appreciated, thanks
@DiodeGoneWild I bought a similar charger and the issue with it is that it charges my phone (4Ah) from 0-25% and stops charging. Then, again begins to charge when it cools down. What could I do to solve this issue? A current sensing resistor replacement maybe?
Did u yus touched around with your finger on the circuit board while it was connected to mains? Thats almost as dangerous as the moment you used your finger as a series resistor in a mains circuit lol
Hello. How come the output reading of a USB plug has 3 data? I am looking for a fast USB plug to be used as an adaptor to my rechargeable battery device. I have two plugs. Data as follows: USB Plug1 Data - Input 100V-240V ~50/60Hz 0.5A Output: DC 5V==3A / 9V==2A / 12V==1.5A USB Plug2 Data - Input 100V-240V ~50/60Hz 0.75A Output: DC 5V==2A / 4.5V==5A / 5V==4.5A Which is suitable and fast charging of two?
Very good review and explanation of a poorly designed and potentially dangerous charger, thank you.. (would not pass an insulation test, why are they allowed to import and sell?)
Thanks :) I ordered this charger directly from China via Ebay. This bypasses all the EU safety tests. It shouldn't be officially imported and sold here, but sometimes those still slip through and so they may sneak into domestic shops and e-shops.
I really like your videos, because you'll explain how those circuits work's and also give us the circuit diagram... Thanks a lot... Always give us these circuit diagram of all circuits..... 💗💗💗
Meanwile this chagrer has a doubble sided board with SMD-components and a chip. 5,3-5,4 volts without load. Delivers still not more than 1 ampere I tink due to the small size of components.
There's nothing to be seen in those at all, just a board bonded chip in a blob of black epoxy. As a matter of fact, good ones look the same these days, they just use better connectors.
![Seungmin "그렇게, 천천히, 우리(As we are)" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/kAzmhLHePqU/mqdefault.jpg)
![Blox Fruits Dragon Rework Update [Full Stream]](http://i.ytimg.com/vi/EqDAp8udhm0/mqdefault.jpg)
You amaze me. No RUclipsr I know of can do so much with so little. Your main tools are pen and paper.
@Adhika Padhana indeed! Those schematics speaks!
@sublexxus79 Me too. I've kept a couple powerbanks, but if there isn't room enough inside to install fuses, it gets torn down for parts. Four 18650 cells can hold a lot of energy, it's just too dangerous.
I might as well buy it just for parts.
DIODE GONE WILD AND CHARGER GONE CRAZY
This is *Crazyyyyyyyyyyyyyy*
THAT'S FOR CERTAIN, NEWS 24.
😂😂😂😂
😂😂😂😂😂
The board was designed for 3 LEDs and than they realized there was no power left for the USB sockets.
Those LED's don't draw that much. They omitted them to save few cents of manufacture costs.
lol
@@DiodeGoneWild fan of ur accent , ty so much for sharing ur knowledge
N please make a video on ur cat
@@DiodeGoneWild This is not the end ...
www.aliexpress.com/item/4000715696803.html?spm=a2g0s.9042311.0.0.3af64c4dhuCUEc
The charger is still manufactured and is even marked 3.1A max at 5V.
Yesterday I opened the cover and found another pcb design with the same insufficient insulation distance and an equally dangerous transformer, also the circuit of the self-oscillating with 2 tranzistors is almost identical, the charger also has no fuse and noise filter.
The rectifier diode is SR160, so this charger is the same as yours.
😂😂😂
Very nice Isolation transformer idea made from two step-down transformers, where the first is wired as the normal step down and the second as a step up, limiting current to the size the transformer's capacity. Also great is your cat in your videos, you've got a good assistant there.
It's a good idea but it works for just very low currents. At higher currents, the voltage drops significantly.
DiodeGoneWild I wonder what was all about the ground connection that you were talking about, I didn't get the idea to use those transformers like that. Do you have any video where that is explained? Thank you.
Cool soviet oscilloscope :) Love your videos, they always bring tons of knowledge to youtube. Keep up the good work!
Never stop posting videos like this please
I won't stop until I die :) and I hope this won't be anytime soon!
Try to get these shitty ones in pink though. To go with this song: ruclips.net/video/ioAq7PI1Uwg/видео.html
This is very *Dangruuuuuuuuuuuuuuuuuuusss!*
waleed khalid cfbbcg
"The output of it is isolated from the mains just with a lot of good luck." - DiodeGoneWild 2018
Thank you. I'm just learning how to use an oscilloscope, and my oscilloscope I built from a kit. It's a DS0138, and your setup on the USB charger. Thank you for your incite DIODEGONEWILD. Great name!!!
2:29 Your cat seems fascinated of electronics 😁
profound knowledge, enlightening and always very entertaining - well done .. now and then I have to close my eyes as you are so close to the mains with your fingers - I'm sure, you've got a lot of e-shocks in your life (as I did, of course) ;) Your Tesla-Scope is e-tubed, I guess (why not using a 1:10 voltage divider, built in in most of these test probes for Oszilloskopes?) ...thx, always a pleasure to watch your videos
Any usb charger where transformer is smaller than usb socket is crap.
Nice piece of soviet equipment you have there.
TЯUE, MУ FЯIEИD
Man, in spite having such a strong accent you're probably more understandable than some natives. And you make good vids too. Some are kinda long but with how you make them they're easy to watch.
I just love your channel and your personality! Thumbs up!
17:04 Fire extinguisher
You have a really cute cat!!!
0:07 I love when kitties are recorded on video.
So what were the results of the "Cat Scan"? lol great video as usual, Al
He also needs a golden retriever for a 'Lab' report...
Your videos are pretty close to bigclivedotcom but that voice though XD
Bright Night not quite
7:06 I expected some BLOODY JESUS
you're literally the only reason I passed my electronics and microtechnology class
@G E T R E K T
Sorry? Our teacher was absent and we had multiple tests coming up. Both the book and this video included in the same content. I never learn using books.
I’d be the reason they’d exist if I used the book because I’d never learn anything with a book.
I was hoping you would test the output of the 5v usb sockets via oscilloscope.
You should wind a proper transformer for it and add the modifications you have shown and show us the results would be quite interesting.
1:55 Your cat is so precious! 😃
old and reliable oscilloscope made in USSR :-) How old it it? 40 years? 50?
It's made in 1988 so it's just 30 years old :).
Yes but their still well built. Are made to last a long time.
The Russians were fans of overbuilding things, because they had almost limitless resources during the Soviet (communist) era.
Sadly, they were taking these resources by force from the countries they had occupied, or otherwise forced to join the Union.
Hahah, nice, but I still can't come to terms with commies though :P
And you never should. Communism is impossible to apply in practice, and everyone who tried, failed miserably. It has left a mark on so many people, we would have been better off if communism and dictatorship hadn't existed in this country, but sadly, not everyone understands that.
Great video. Good to see the scope traces too. I see it did not pass the CAT SCAN either.
“No question mark, it’s actually a death trap” 😂😂😂💀
Great videos! Very useful to not buy dangerous things. I wish you could explain some day about those diodes against each other instead of the snubber network. Still figuring out exactly how they work. Is usually a normal diode + zenner 180v.
Loved the soviet vintage scope at 15:01
Excellent explanations.
Another interesting video, nicely done.
🎶Octocupleeer🎶🎶🎶
16:10
Sometimes a clamp is not needed on the transistor. This mainly has to do with the design of the transformer. But yeah most flyback supplies have a clamp. BTW, sometimes instead of a diode/cap/resistor, I've seen a high voltage TVS diode in it's place, to clamp the voltage.
That electrolytic cap - C H O N G - X Now made with more Nu-Metal in their Industrial Metal foundery where they specialize in Alternative Metals; that's pretty Progressive.
E2qNX8btraQ3zRD6J7fc ChongX is also a rip-off off another chinese capacitor brand called ChengX
ChengX is not Chinese, it's Taiwanese. And yeah it's an old well-established brand and an "import" thus somewhat coveted in China, but ChengX were never particularly high quality, they are just about the lowest grade of the Taiwanese ones, though China has many brands that are worse and few that are any better. And thus the desire to fake it - there are multiple brands in China that imitate the appearance of the ChengX logo.
The finger... THE MOST EXPENSIVE thermal camera, not cheapest !!! Try to buy another one !!!
I did once. The cops were not amused
Hee hee... Did they use theirs on you nicely ?? !!! Without petroleum jelly ??? !!!
Dude i was gonna comment that.But yeah a finger is surely a lot more expensive and you are not able to get another one.So your finger is a treasure and you need it most and a thermal camera..... You don't even need it
You can't buy a finger but you can give the finger to someone you hate
Having exact the same chargers bought from gearbest for 2$ but mine is tottaly different inside its full of smds on bottom and just some power components and diodes on top. Isolation is also almost non existent on mine
Cat has a major role inspecting the dodgy charger in this early episode.
Thank you very much for explaining how this power supply works.
It looks like you actually used the fire extinguisher as its seal was removed ;)
Yep too many corners cut with that design, 1 amp was optimistic lol.
I have seen that 13003 transistor in so many cheap supplys and flourscent bulbs.
It must be their favorite and cheapest one to use, and the c945 is very common but quite reliable.
Do you think the transformer is to blame for the low current problem, or just the 13003 is not having a heatsink, so the emitter resistor can't be lowered in value slightly.
Your cat wants some fuss :-D
1.40 USD including shipping is probably not enough to build a proper 1A charger. The problem may be the transistor or transformer, but it also may be the low capacity of the capacitor at the output and also the low capacity capacitor at the input, which makes the voltage drop too much during zero crossings. The transistor and transformer thing is much more complex. The same transformer core can transform more power if a higher frequency is used, but it requires a faster transistor. Also the windings are important for the power. Higher frequency allows for less turns, thus thicker wire and more power. But also the arrangement of the windings is important. It a split primary is used (half of it below the seconrady and the other half above) the frequency can be higher and also the stray inductance is not that high, so it can handle more power without too much ringing and overshoots. Also a snubber network would help to reduce the stress of the transistor and thus allow for more power.
Great video, very detailed explanation.
Thanks again. These Chinese cheapos don’t stop frightening me. I’m glad we have very efficient authority Tukes here in Finland which examines these. It’s sad that those are not mandatory anymore because of EU. There are huge amount of bad power supplies where the safety gap is too small or are causing interferencies. BUT please, be careful with the mains voltage! I hope you have residual current device which understands also pulsating DC. I’ve been doing electronics for over 50 yrs and I felt me slightly worried when you have mains voltage so open. I never hold multimeter leads with two hands when measuring mains voltage and keep the other hand behind my back or in pocket. I want you to continue doing these really fine videos.
Another great video. Your fingers got way too close to to that live 110/220v input wires, please be careful my man!
thank you for this video, very instructif, please i have a question about that oscillator : how the 4.7nf capacitor is discharged, when primary current stop,of course there is an oposit EMF induced in the auxiliary winding,what is the path of the auxiliary current at this moment.
is it essential that transformer used need to have isolation winding?
can a charger be made using 5 v regulating supply using 7805 and a relay to switch off when charging is finished?
If it is powered by mains electricity, then isolation is absolutely necessary. To learn why, you need to learn about the power grid and earthing. There is an excellent video about it by +The Post Apocalyptic Inventor.
If you want to charge a phone from 12V or so, then you could use a 7805. It´s not very efficient though. The higher the input voltage for 7805, the lower the efficiency, resulting in more heat.
There would be no need for a relay because the phone will stop charging by itself.
As your testing is typically destructive, you could also test the flammability of device's cases. Usually it looks like one last place for a device to fail safety test, if everything else looks good. I have ordered ~5 chargers from china, and none hasn't had flame retardant case.
Prodávaj se normálné u nás v kamených obchodech a eshopech asi za 149kč a u různých vietnamcú je teď zlevnili na 49-79kč. Ta moje má ještě nad usb natíštěno 3,1A což jsem samozřejmě nevěřil a koupil jsem jí ze zvědavosti za těch 49kč a čekal něco mezi 1-2A a dává stěží těch 0,7A. Nemám moc levných věcí na 0,5A tak asi půjde na součástky, USB konektor a modrá LEDka se vždycky hodí. Btw. Krásný zvědavý kocourek ;-)
Genius way for isolation! Thx for idea.
I simulated this circuit, and it had the exact same ripple and overshoot issues. They didn't even simulate to test if dropping the component values to save money was a good idea...
Is your -bottle of Žatec- Fire Extinguisher is also the same from the previous uploads?
Cute kitty. He looks very smart, like maybe his best friend is an owl.
I hope you will make more power supply repair videos in the future.
I have to find some failed ones first :). I think I have a nice powerful ATX for repair somewhere....I just have to recall where did I put it...
I have many of them, if you want I can send you some (wall adapters, mainly from china) + failed LED GU10 bulbs. I am curious what failed in them. No need for send back. I am from Slovakia so posting is no problem. I tried to identify failed components in them, without success. :) Maybe with your video I can learn something new.
That is a good idea, to me at least, because I love learning on all types of things needing repaired.
Hey, great video!
What's the purpose of the cap you drew in the spike absorbption part of the primary tho?
Awesome video :D can you please test Mi(Xiaomi) charger?
Thank you very much for explaining how this power supply works. It was the simplest ps I had ever seen. I learned a lot. But
Can you explain to me please why a full bridge rectifier isn't used at the secondary (except for the cost cutting issue)? It seems it will double the power. If they use a transformer with a symmetrical 3 wire output, all they need is an extra diode to double the power.
Another question. High voltage transitors have very low gains. Except the cost, would it be more efficient to use a MOSFET instead?
I did enjoy the scope photos which are missing from all the other teardowns. If you do another, a shot of the base waveforms would be nice cause I can't convince myself how the R-C L oscillator works.
An ON semi MJE13003 has a breakdown of 700 Volts 400 V sustained. Disregarding the bandwidth of a Tesla scope the ringing on the primary looks to be less that the 77.5 volt reflected back from the secondary. More expensive tran snubber network tradeoff?
OK, the next one will be with the base waveforms ;). Without a snubber network, the transistor suffers more stress and so the output power has to be reduced to prevent its failure. The ringing increases the voltage quite a lot, by about 150V.
If you don't want to short mains. You can tape the ground wire of osiloscope, like electroboom.
Isolation transformer is a much better idea :).
DiodeGoneWild Yes it is :)
Love the cat, and the 2 scopes.
Your videos of Chinese electronic stuff are very interesting and your cat is very very beautiful.
Hi your videos are always awesome, I'm having two major issues in designing the SMPS,
1. When i overload the supply its voltages drops to some lower voltages, if i change the ferrite transformer with another one of bigger size then this voltage drop is less. My question is how the ferrite transformer affects the voltage drop?
2. also when i put the load its fet starts heating, actually im using it without snubber. My question is deos the snubber affects the heating problem of FET?
Answer will be highly appreciated, thanks
Someone was hungry while manufacturing the charger and he eats the letter a from china
Kámo, super video! :) A jsem rád, že piješ Žatec - skvělý český pivovar :) odkud pocházíš?
I hope you meant potentially deadly, I didn't see the cat towards the end of the video. Very informative video.
@DiodeGoneWild I bought a similar charger and the issue with it is that it charges my phone (4Ah) from 0-25% and stops charging. Then, again begins to charge when it cools down. What could I do to solve this issue? A current sensing resistor replacement maybe?
Did u yus touched around with your finger on the circuit board while it was connected to mains? Thats almost as dangerous as the moment you used your finger as a series resistor in a mains circuit lol
Where I can buy your thermal camera :D
I think this is one of the simplest examples of SMPS. It's a nice start. Next step is how to design a more quality and powerful one.
Is Veritáska still doing your schematics for you ;-) ?
Can you buy the new one plus 6 and then open its new charger? It's has like 4.8 amps. I want to see whats inside
This would probably blow up the EMI test receiver in the type testing lab..
i have the same charger that i'm using from 5 months.
i'ts pretty good but is rated for the crazy ammount of 3.1 ampere.
real or fake?
Read in d description , 3.1 amp including all 3 ports
Hello. How come the output reading of a USB plug has 3 data? I am looking for a fast USB plug to be used as an adaptor to my rechargeable battery device. I have two plugs. Data as follows:
USB Plug1 Data - Input 100V-240V ~50/60Hz 0.5A
Output: DC 5V==3A / 9V==2A / 12V==1.5A
USB Plug2 Data - Input 100V-240V ~50/60Hz 0.75A
Output: DC 5V==2A / 4.5V==5A / 5V==4.5A
Which is suitable and fast charging of two?
Very good review and explanation of a poorly designed and potentially dangerous charger, thank you.. (would not pass an insulation test, why are they allowed to import and sell?)
Thanks :) I ordered this charger directly from China via Ebay. This bypasses all the EU safety tests. It shouldn't be officially imported and sold here, but sometimes those still slip through and so they may sneak into domestic shops and e-shops.
Use this charger everyday, for months now it charge pretty quick, and never have any problems
I ordered the cat from ebay
How much is it including shipping? :D
DiodeGoneWild
No sir i just jocking
purr-fect
@@DEADLY_890 he was also joking only
Whats is the mega solder irion?
:-)
Thats odd, the circuit should always work at the boundary between continuous and discontinuous mode (bcm), but im not too sure whats going on
very well described, keep going
I really like your videos, because you'll explain how those circuits work's and also give us the circuit diagram...
Thanks a lot...
Always give us these circuit diagram of all circuits..... 💗💗💗
Meanwile this chagrer has a doubble sided board with SMD-components and a chip. 5,3-5,4 volts without load. Delivers still not more than 1 ampere I tink due to the small size of components.
Excellent job, thank you,
I thought danger could be of zero to 1 volt difference. But, it seems that output could reach the 220 volts
Plz make a video on how led driver circuit works in led tv backlight
Oh man you have to take an oscilloscope from Electro boom : - )
You make great videos
Dobrá angličtina, nechceš natáčet nejaká videa v cs?
Hello everyone, where can I find mobile phone batteries datasheet like Samsung, Asus, or something like that? Please tell me
how old is that soldering gun?
isolated with a lot of "Good Luck" :D :D :D
I like your cat, and good review of bad charger.
I have one similar (same case but says 3.1A), but it has 2 leds and better isolation, probably an upgrade from that one. Still less than 1A.
Your English gone wild 😂
Do the teardown of cheap micro SD USB adapter
There's nothing to be seen in those at all, just a board bonded chip in a blob of black epoxy.
As a matter of fact, good ones look the same these days, they just use better connectors.
Why would he do that?
Please dear
Could you make a video about designing a simple SMPS for beginners from A to Z ?
Do not worry friends, the cat has a masters in catgineering.
I also got one like these and the isolation was a small piece of tape.
I immediantely threw it away.
Does this charger work at a switching frequency of about 600 kHz. Do I think right
Let me doupt towards 12:01 second one did never come.
Nice video
In Soviet Russia, oscilloscope waveforms you.
Sir please draw a right picture 🙏 i am trying to made charger. But he did not working all component are ok only opto cupler is not chek