Dangerous USB phone chargers 3 (& one good charger)
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- Опубликовано: 4 окт 2024
- 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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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...._
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
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
Orico also has really cool looking USB Hubs, which also seem to not be dodgy
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.
What I dislike about them most is their use of USB A as an input port, you'd be using an A to A cable. Instead of using USB B or C 3.0. Not does it make it look cheap, it is dodgy. (Yes modern motherboards have some usb voltage protection, that doesn't excuse that)
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 Orico for the donation so we don't have to see just super dodgy ones :)
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!
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! 🙏
Thanks for another good video. Yes, Orico have, in my experience anyway, usually good to very good products.
List of conclusions:
8:15 SUPER DODGY!!!💀
20:15 DODGY!
31:36 NICE 🙂
Sound like the list of my girlfriends. ;D
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
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.
yes i have same charger from aliexpress (ORICO), but with 2A output and it works very well, its stable and cheap
31:34 - So the conclusion is... NICE 😊 (with slap 😁😂🤣)
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 taking the time to make these videos. The core of the last transformer is an EFD type made by Magnetics Inc and some others.
ORICO makes really good products overall.
A very good brand for sure.
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
The last charger was unexpectedly good. I will wait for that optocoupler autopsy 😂🤣😁😆
31:37 So, the conclusion is... clap .... NAAAAICEEE 🙂
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.
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
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.
I have just finished my super duper micro programmable constant current load, and I am so happy!
P.S. YES MAKE SOME AUTOPSIES OF OCTO-COUPLER'S PLEASE!! That Would Be Great To See, No One Ever Really Takes Them apart!!! : )
never seen a transformer like that 3rd one.. very cool.
Those shape cores are quite common in samsung chargers .
19:29 Here's my cat on the schematic😁😁 I love your cat.
Helpful video
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.
Moar danjarooz! ♥ Love your channel.
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.
Thank you for these brilliant videos. I'm learning so much.
I have learnt a lot from your videos, but I would seriously watch just for your voice lol
Thanks a lot for great video and schematics!
Now i can add more chargers into my spreadsheet!
Orico is a good brand.
CAT: No mean schematics today, peasant, your viewers must behold my infinite PURRfection
That was genuinely interesting. I have never seen a transformer design like the last one.
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.
6:50 "here is my cat, of course"
0:07 DONNAY Damen Sports Bra
;-)
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.
@ 20:16, I love the voice : Dodgyee 😀😀😀
Finally a green conclusion 😊
The marking on this chip is OB25133JP
Особенно доставило про огнетушитель в самом начале! Швейк отдыхает )))
These are my favourite videos
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.
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
26:53 This core is an EFD core.
Yes
My takeaway from this excellent video, I want a pet cat.
I'm amused by how much your cat likes you.
And of course here is my cat.
My cat always pays close attention when you unwind transformers. The sticky tape is still kinda sus to him.
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.
Wow A Quality Transformer at Last.....lol
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!
at 8:53 the reason it has a high voltage is because 10 more voltages is added
Nice happy ending!
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 👍
Nicely done
Orico is really a high quality manufacturer.
I want to see an octocupler
I love ur video thank you for Making them
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.
I love to watch your charger video make more video daily 😊😊😊😊
It's the best to use the original charger for you device. Some manufacturers even include fast charging chargers, for example Motorola
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.
I would love to see the English subtitle. :)
19:36 like for cat face
Your cat is gorgeous 🤩
Official phone charger review channel 😉
Great Video.
9 chargers + 9 Cat lifes + DiodeGoneWild = Nice USB charger ...
Roswaal? Is that you?
You have 9 chargers, but your cat has 9 lives! :D
I own a 2A version of Orico charger. It's really nice.
i have 2, 4 port orico charger. they are working great while 3 year.
Nice maybe but no ETL/UL safety certification, no go in North America, you can find adapters with those in the same price range.
3:03 The same PCB as "ITMAX" branded charger.
27:25 yay, Daft Punk!
27:40 If you didn’t know, that wire is called Triple Insulated Wire or TIW for short. You can check out Furukawa’s website although lots of companies make it now. Using TIW is really the only way to meet safety requirements in a small transformer like that. Basically impossible to use margin tape here like 3M #44 tape.
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...
Konečně i nějaký solidní kousek po všech těch Čínských s*ačkách, ale obávám se, že takový teď zase hodně dlouho neuvidíš.
aa gurman pivka se pozná, take si rad davam Zatec :)
In case of transformer in #3 that tick isulated wire is called triple insulated magnet wire
I realized at 8:53 it might had a higher voltage to compensate for the resistance on the cable and usb port
When you gonna put your DIY welding inverter in the box
?
I love your kitty cat.
Super Fan of orico
It’s that sports bra again
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.
Thank you I like this!👍
Teradown Mi 27 Watt Fact charger. Poco x2 (redmi k30) is
Love your accent; Optocooooopler!