Dangerous USB phone chargers 3 (& one good charger)
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- Опубліковано 10 бер 2020
- Today, let's compare a good quality safe USB charger with a dangerous charger and an even more dangerous charger :). Let's see what's inside, including schematics and how do they work. Only use good phone chargers, don't get electrocuted.
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![ЛЕБЕДЕВ у ДУДЯ: муху не обманешь 😁 [Пародия]](http://i.ytimg.com/vi/E74h5fvVrqs/mqdefault.jpg)
3:12
*Okay team, we need a solution...* *We can't afford to: 1.) include a fusible resistor in this design, 2.) pay everyone a paycheck, and 3.) stay in business. One of those has to go. Any suggestions or solutions?*
....
*No one?*
...
*The building janitor in the back.*
*Yeah you.*
*Speak up.*
_...Well,..you know the radio guys 2 doors down the hall? See, sometimes, when they can't afford something they just invent components on a printed circuit board. So I'm left wondering, why can't you guys?_
*Seriously?... What? Like draw the symbol of a capacitor and it just "becomes the capacitor?"*
_Actually, yeah. They do it all the time._
(long pause)
*Brilliant! Get this man a lab coat! You heard him. Team, make our fusible resistor on the PCB in copper.*
How?
*I don't know?...(turns to the janitor)*
_...just draw a resistor!_
American, European, or Japanese?
_...whatever is easier for you,.. of course..._
(starts drawing)
...Americans just scribble a zigzag.
...
*Looks good. Let's go with that. Nobody questions the Americans.*
...
*I like this radio thing.*
...
*What other tricks you got for me Jany?*
_Well...._
Mai Mariarti - I know, right? It was just getting good! 😃
He should probably add a car chase or gun fight. 😂
It's wrong.... they forgot one extra zig-zag. xD
I want to hear more of this!!! this is hilarious!!!
Especially as someone who spends 50 hours/week in my lab troubleshooting/repairing industrial equipment. It amazes me when comparing professional to consumer electronics.
brilliant
Traces in the circuit board to act as fuses or antenna, that is why he calls it Chinese fuse. Would be nice test to see how many amps it takes to “blow” it and if it’s consistent.
"Actually, I have 9 chargers here. And my cat, of course."
Brilliant content.
The first charger has very creative artistically soldered transistors. Hidden feature.
The first charger uses your phone as its fuse... mind blown. ;D
@@BillAnt and phone blown :)
I binge watched your videos so much (plus Big Clive and Louis Rossmann) that I was able to identify the problem and replace the busted NAND chip on my dad's lcd television. Thank you for your videos, Diode.
You should really get into New York city real-estate (hint: Rossmann ;)
The single endedly connected wire which you encountered at 29:00 is called a faraday shield and, as you stated, aims to reduce capacitive coupling between primary and secondary.
I love your high quality content (especially the schematic discussion is very nice)!
It would also be interesting, to see a teardown of some laptop power supplies in a future video!
You know that extra piece of winding cost a Chinese worker a coupe of days of wages. ;D
2020: What a cheap dodgy peace of crap
1920: (if taken back in time and given to Einstein or some other scientist of the time) *what a marvelous piece of engineering! This is phenomenal!*
In that time, the electricity was quite advanced, so it will be Dodgy and not Super Dodgy (Or extremely dodgy if im wrong)
Einstein is extremely overrated.
WTF WOULD EINSTEIN DO WITH A 5 VOLT ADAPTER?
They’d be horrified by the sloppy transformers though.
@@markiangooley there were no small transformers at that time
Orico also has really cool looking USB Hubs, which also seem to not be dodgy
Thanks Orico for the donation so we don't have to see just super dodgy ones :)
25:25 OB25133. There is datasheet available if you search for OB2513x.
Niiiice! 👍
I've always had a good impression of Orico. Never bought any of their chargers, but I've bought some hdd/SSD caddies, some cable adapters, and a couple of PCIe USB controllers from them, and they've all been excellent. Great to see that their chargers live up to the same standard.
Orico is actually a halfway decent brand, I have a few of their products, mainly USB hubs and whatnot. I like them.
Can confirm, I've used their USB-C to M.2 NVME enclosures and they work great, with fast speeds. When I saw the brand, I knew it had to be good.
Also can confirm. I have one USB sound card from Orico and it is amazing!
28:13
Just one tiny extra piece of tape could improve the safety of all those ‘super dodge’ chargers, improving most of them to just ‘dodgy’.
Mai Mariarti
???
dodgewwe3
@@arpitjain4025 NICE
Its not Just the small tape but Its all about Intention and attitude to make things safe and worthy. If u check u will find that it doest required anything extra just to make all chargers from "Super dogey" to "Nice" . Not even in chargers but same story is there in every chines products (except the products which other companies make in China in their own presence with their own design and quality check) Means If china wants they they can easily make things better but they just dont have that intention, They are just playing with peoples lives with unsafe, toxic products and filling world with Chinese craps and waste products.. Its Criminal...
@@arpitjain4025 niced
Small note on double auxiliaries at 29:38
this is done so that the winding occupy the whole width and have better coupling with the secondary hence more accurate output voltage
That makes sense. Didn’t know that. Thank you! 🙏
So the conclusion is to always buy good quality, branded power supplies and never go for the cheap looking ones - the difference between the "nice" PSU (Orico 1A) and the dodgy/super dodgy ones really is night and day. A lot of the bad PSUs can't supply the rated current for extended periods of time, if at all, and have safety issues such as the lack of a fuse, the lack of isolation on the board/inside the transformer, and the lack of a safety capacitor. The first sacrifice made is usually swapping the Class Y1 capacitor for an inferior 1kV capacitor.
Thanks for taking the time to make these videos. The core of the last transformer is an EFD type made by Magnetics Inc and some others.
A very fine and thorough teardown as always! I ❤ your cat, I come for the excellent engineering analysis but stay for electronics cat 😀 lol.
Thanks for another good video. Yes, Orico have, in my experience anyway, usually good to very good products.
31:34 - So the conclusion is... NICE 😊 (with slap 😁😂🤣)
Thank you for these brilliant videos. I'm learning so much.
I really love your acceeeeeeeeent!
Yes but what is it?? Swedish Indian???
@@southernkatrina8161 He lives in Czech Republic
me tooooooooooooou
Italian Indian?
Sometimes I think this accent is fake, because his English is not overall that bad, maybe he just speaks like that so the videos are more interesting
Thanks a lot for great video and schematics!
The last charger was unexpectedly good. I will wait for that optocoupler autopsy 😂🤣😁😆
hello i am not an electronist man,i dont have knowlege about eletronics,but i like your videos,you explain in a interesting mode with schematics verry accurate with diferent colors,very easy tu understand,that make electronics sims to be more easy to learn with pleasure,and of course you are very funny...with Fire Extinguisher :),your cat,your dog sometime,and others funny coments that you make,i salute you with rigards
Moar danjarooz! ♥ Love your channel.
yes i have same charger from aliexpress (ORICO), but with 2A output and it works very well, its stable and cheap
I have learnt a lot from your videos, but I would seriously watch just for your voice lol
ORICO makes really good products overall.
A very good brand for sure.
Love ur vids and learned a lot from them, but would be really cool if you measured the inductances of such transformers!.
It is interesting, the difference of cheap fake to good chargers :D
Good job @DiodeGoneWild :D
I love ur video thank you for Making them
I have just finished my super duper micro programmable constant current load, and I am so happy!
I think one of the reasons the voltage in these is slightly high is to compensate for shitty high resistance USB leads.
确实是这样的，用来补偿线阻
Helpful video
The schematics are a CAT-tastrophy!! ;-) Question: Could the heat gun be shrinking the tape in the transformers causing what was "OK" isolation to become "dodgy"??
Any decent power transformer should use materials safe to at least 105°C (and of the SMPS transformers I've seen with a visible temperature class, it's usually 130°C).
(That said, I don't know the temperature setting used there.)
A good quality Kapton tape should not shrink from regular assembly heating.
Not really, unless you use the guy for way too ling.
Also, not all plastics shrink when heated.
In the olden days layer isolation tape was feathered at both edges folding upwards on the bobbin. Wonder why this isn't done today anymore.
List of conclusions:
8:15 SUPER DODGY!!!💀
20:15 DODGY!
31:36 NICE 🙂
Sound like the list of my girlfriends. ;D
Nicely done
Great Video.
Thank you I like this!👍
What can we do to heat building up i have a 4 port charger and when i charge 2-3 simultanious it really gets hot..something i can replace or do ??
Great video. Thanx.
Are you making a video about the rest of the chargers soon? I'm really waiting for that. Good vs. Dangerous 12 volt car charger comparison would also be cool to see.
These are my favourite videos
aa gurman pivka se pozná, take si rad davam Zatec :)
CAT: No mean schematics today, peasant, your viewers must behold my infinite PURRfection
I have an ASUS PA-1070-07 USB charger, which has an output voltage of 5,2V and 1,35A. Is it safe to use it with all the USB devices (which need 5V), including an LG V30?
In chip mode power supplies , on time and off time and totally the frequency is easy to determine due to the datasheet of the chip , but i'll be glad if you create a video about calculating the on time and off time and inductance of primary winding of one of these discrete circuits ! And i really enjoyed the good adapter transformer 👍
Most devices won't charge under 4.7 properly, I like fully regulated chargers that maintain 5.1-5.2 v throughout rated current. The energizer brand does very well and is UL listed for safety and won't burn your house down.
14:56 _"One day I should make an autopsy of some optocoupler too"_
Yes please. I searched your videos and it doesn't look like you've done one. It would be interesting to see a comparison between cheap and quality ones.
Now i can add more chargers into my spreadsheet!
22:34 How did you find out that the small smd component is an inductor? (Maybe when drawing the schemetic?)
Tx again as always;)
Several easy things to spot: resistors are usually a lot wider than high, inductors have more of a square cross section. The color is different, resistors almost always black, inductors grey, capacitors brown. Also SMD resistors are marked except for the very small ones, so no marking -> most likely not a resistor.
Yes, and then obviously when trying to draw the circuit. A resistor wouldn't make sense there. Measuring will also tell you it's likely an inductor even in circuit, because it will have a very low resistance.
Is the adapter in the mosquito zapper the same as the adapter for the phone charger
Super video
What is the function of resistor in parallel to diode inside optocoupler?
This is to ensure enough current through the zener. Zeners may be inaccurate at very low currents (they will have a lower voltage drop at a low current). The resistor bypasses the optocoupler LED for low currents.
@@DiodeGoneWild Thank You, now I now!
Nice video ☺️
I love to watch your charger video make more video daily 😊😊😊😊
19:29 Here's my cat on the schematic😁😁 I love your cat.
That was genuinely interesting. I have never seen a transformer design like the last one.
When you gonna put your DIY welding inverter in the box
?
very good!
Orico is a good brand.
Do you know LDNIO chargers? Also chinese but the one I have supports fast charging. I can always take a few pictures of the PCB if youd like to see them
Hm, if the second charger didn't have such a bad transformer, would it have at least been safe, even though not ideal?
The Orico USB ‘chargers’ are not available on eBay in the U.K., as apparently they are blocked because the seller is not being compliant with UK VAT rules.
Orico also doesn't pay for the mandatory certifications required to sell into most countries.
Thanks DGW for all your work! I analyzed some chargers and power supplies after seeing your videos and it can be summarized as follows: *Don't buy Chinese power supplies or chargers* unless you have opened one or someone else did or it's a very reputable brand and no brand-ripoff (e.g. like the common _Samsung_ fakes you showed on your channel). a) The biggest problem being the transformers. They are mostly all shitty. If secondary and primary/aux aren't touching it's more or less simply luck that the guy winding it was looking out of the window. The device you didn't open is most probably dangerous - Murphy. Professionally wound transformers can be easily identified by massive amounts of tape much wider than the core. b) the isolation distance d) the decoupling cap which is not safety rated.
What is the purpose of the auxiliary winding?
I'm amused by how much your cat likes you.
I can sometimes buy (nominal) 5V 1A USB supplies here in the USA at locations of a chain store called Dollar Tree, for US$1. They seem to recharge my phone adequately but get rather warm in use. I took one apart and it looked okay (separation between primary and secondary looked good, at least, but I’m no expert) but I didn’t take apart the transformer. Maybe I can send one in...
Official phone charger review channel 😉
Have you tried a water based carbon dioxied fire extingisher in a electricity based fire.I´m not sure it will work but why not try with beer-diodegonewild?
Finally a green conclusion 😊
never seen a transformer like that 3rd one.. very cool.
Those shape cores are quite common in samsung chargers .
Will you please take a look inside a normal samsung and I phone charger?.
P.S. YES MAKE SOME AUTOPSIES OF OCTO-COUPLER'S PLEASE!! That Would Be Great To See, No One Ever Really Takes Them apart!!! : )
I wonder when they will accidentally or on purpose include a self destruct function
Where can you buy that nice transformer?
The last one looked really well made, and no supprise it works well :-D
Have you ever made one that small using your epic knowledge in switchmodes?
You are a very clever man, i mean that.
Yes, that one was quite good. But you can't really trust anything unless you take a look inside :). I think I could make a very small one, but I was lazy. Several times I made a small switching power supply, but I put it into a housing originaly made for wall power supply with a standard transformer.
@@DiodeGoneWild Not lazy, more like an expert at recycling lol.
HI IS THERE ANY WAY TO CONTACT YOU ?
You have 9 chargers, but your cat has 9 lives! :D
The chip number for third charger , which you opened from box is N010 823133JP, Sadly I can’t find its data sheet
I love your cat!
0:07 DONNAY Damen Sports Bra
;-)
What a convenient way to buy some diodes. Too bad they have to be harvested from shoddy USB phone chargers.
Dang, that ORICO is smexy, though. I should get one. I like to charge my phone at 1 amp.
Konečně i nějaký solidní kousek po všech těch Čínských s*ačkách, ale obávám se, že takový teď zase hodně dlouho neuvidíš.
It's the best to use the original charger for you device. Some manufacturers even include fast charging chargers, for example Motorola
31:37 So, the conclusion is... clap .... NAAAAICEEE 🙂
Nice video. One question from electronic laic: Why theres almost no USB chargers with 3rd (grounding) bolt? Would it be harmful to devices or dangerous?
afaik/understand - like most wall adapters, laptop chargers etc - those are "double insulated" devices, the output is isolated by the transformer and thus does not require GND since the user has no access to the live circuitry - in a case of a circuit malfunction, an internal short should either burn the fuse or trip the saftey auto switch.
The dodgy chargers has dodgy isolation and a dodgy risk factor - they are manufactured to the lowest quality but based on proper existing designs that assumes parts and assembly of a certain quality standard...
I never use the cheap/"free" chargers, no reason to risk a xxx$ phone or equipment with a 1$ charger. I instantly scrap them to my spares pile and their enclosures come in handy every now and then.
To elaborate a bit, devices that are double-insulated are marked with a square-inside-a-square symbol, e.g. the symbol at the left at 20:42.
i checked all my charger they all leak at least 90v and 20ma i dont know if it can be dangerous
I have several Orico product, they are cheap, but as far as their performance goes, they are as good as the more expensive Aukey. Now that I know they also have a good standard for safety, I have no more reason to not stick with the brand.
My takeaway from this excellent video, I want a pet cat.
How much was the last charger?
I think the Orico charger was 3.99 USD. It's on ebay.
In case of transformer in #3 that tick isulated wire is called triple insulated magnet wire
Nice happy ending!
I’d like to see more good chargers teardown and compared to bad. Especially the transformers inside a brand name Apple and Samsung charger compared to cheap chargers
where are you from?
6:50 "here is my cat, of course"
Ahoj, udělej prosím ten test zkratuvzdornosti.
I realized at 8:53 it might had a higher voltage to compensate for the resistance on the cable and usb port
The marking on this chip is OB25133JP
扁平欧规充电器蓝色 又是深圳特产，我很好奇你那里买来的这些东西，现在中国国内都很少见这种东西了。