Dangerous cube-shaped USB charger with 2 ports
ฝัง
- เผยแพร่เมื่อ 30 ก.ย. 2024
- Today, let's take a look at another dodgy USB charger. This time it's a cube with 2 USB ports, rated 2.1A (for iPad) and 1.0A (for other devices). The switching power supply is supposed to be 5V 3100mA, but this is far from reality. Also the safety of it is quite questionable. It may cause a fire or an electric shock.
You can support me on Patreon:
/ diodegonewild
Ive said it before but no one else on youtube explains switching power supplies this clearly
Agreed
I agree. He had a really good 2 part video a while back that is just fantastic. Really simple easy to understand explanation.
hey diodegonewild can you plz make a video about your homemade devices
@MA4DI -
YES , it would be interesting how diodegonewild build his stuff
Yes, definitely
@@Killerspieler0815 he has so many homemade devices he should share them with us so we can make them too like the ESR tester i am rely interested in it
@MA4DI -
YES , again
I would like to see some video providing detail on magnetics (coils, transformers), i.e. why use air gaps, dynamic air gaps etc.
Yes, I would too. I would like to know more about how an air gap effects the working of an inductor, and how saturation is used in an inductor.
air gaps are used in transformer to prevent the core from magnetic saturation
Hey, can you make vadio on all type of power supply like flyback, half bridge, full bridge, push pull and their specifications.
Because no one can't explain power supply clearly then you one TH-cam
You are the master of power supply
👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍
Yup, I agree.
Very robust transformer. They have put 2 turns of isolating tape on the windings in stead of just one. 👍
The ultra cheap transformers have absolutely no mains isolation in them, except the lacquer on the wires (0.05 or 0.005mm thick!). Be grateful for the isolation that you can get. :)
- And it doesn't explode, which is a good sign! XD
*DIOOODDDEEE!!!* 😂
I love his pronunciation !
Your channel is the greatest, I love your videos. This dodgy USB charger needs more saaaalt
needs more saaaaaaaaaaaaaaaaaalt XD
More salt hahahaaha actually that water heater video where salt is poured in the container..
@@s40s06 I think "even more saaaaalt" has evolved into a local meme.
I like ur cat 🐈
I like the clean schematic
It is rare talent ❤️
Needs so much patience and multimeter continuity
I can't thank you enough for all the things i've learned from your channel and your website. Flyback power supplies were some engineering sorcery to me before i found your channel, even though i'm studiying electrical engineering for 4 years now. I'm actually planing on designing my own one for audio amplifiers and lithium chargers. It would be awesome if you could do a video on designing one from your website. Will definately consider supporting you via patreon. Keep it up with great content bro.
Your plugs are wrong. That's why it didn't fit.
Just kidding. 😄
To test the dodgy charger I have to use this dodgy adapter :) 1:47
*dodginess intensifies*
I think it's time to compare similar PRICE point products from different countries instead of just looking at cheap Chinese products. I don't think most people need a lot of proofs for "you get what you pay for". It would be good to see "you get MORE than what you paid for".
Chinese people: Let's make cheap chargers that only work with our adapters!
Dodgy chinesium things are made for birth control. China has an overpopulation problem
I am just wondering. Anyone tried to use beer to fire estuinguish fire on electrical device? LoL Sorry, I am layman, but I find it pretty funny idea :-D
There are people who tried to warm up babies in microwaves, pointed fireworks into their eye, sawed or drilled a hand granade, drank a drain cleaner when constipated, and so on. And on top of it, vast majority of people would even open a fridge to replace an air conditioner! Or climb on a ladder to watch an eclipse from a closer distance (and fall from it).
You're not supposed to put the beer on the fire, you drink the beer and if the fire doesn't go out by itself you piss on it.
Thanks for this forensic teardown and explanation. My employer purchases similar cheap very dodgey 5V chargers for staff who lose their company issued mobile. I can show now this is a risk to the equipment but more seriously one to his valuable staff and why the OEM charger is the only option even though they cost more.
TILL NOW,YOUR CAT MUST HAVE BECOME A MASTER IN ELECTRONICS BY WATCHING YOU🔥👍😂🤣
Yes i power up a USB stereo speakers conected to laptop with similar 5v power supply.The blue cap was shorted ,probably via ground loop.And the laptop exploded,,the wire melted.
can you explain how to control the current output in SMPS using the UC3844 pls
I think load regulation should be covered in the datasheet
I think load regulation should be covered in the datasheet
Who is this interfering dude that keeps getting in the way of brilliant cat videos by trying to explain about electronics!? 😠
Edit: it would be also nice seeing what the ripple / characteristic of the output voltage is in addition to the transformer signal.
I LIKE YOUR ENGLISH🤗
Hahahahaja ha! !
How can one donate you devices to make a video with mate?
What device would you like to donate? Contact me at danyk@centrum.cz
I want to see that compuer power suply in next video, can you make video about it? Btw nice video as always.
That pc psu must be good, cant wait till u upload it. Great video mate!!
this cat really likes electronics 👍😄😳
Hmm very under rated, 1 Amp total.
Even your loverly cat didn't think much of it lol.
They always lie through there teeth about what a device can do :-(.
Pity they didn't include an opto coupler :-(
What you've expected from a device that costs 1 or 2 $ £ € or whatever... That's the price of the copper windings :D
gumpi5
Yes you are right there lol, the copper is likely the most expensive part.
I would rather have a decent device that costs more and lasts.
I use the chargers that were supplied with the original phone/tablet, they are normally quite decent.
I really don't like the idea of building chargers in to mains wall sockets, but people go mad for them, ill stay old fashoned lol.
That's a spiral of lies. Once the competition starts lying, They have to lie as well. Once the competition lies even more, they also have to lie even more to keep up. The absence of an optocoupler is definitely not the worst problem. Even some branded chargers have none.
... their teeth ...
Nick B, Very true, iv'''e nooover boon god at spooling Nuck lol.
Shame you didn't make an interesting comment, just picking fault with my imperfect spelling, shame :-(
Moja teta si to objednala z čini a ked mi to ukazala tak som si spomenul na tvoje video tak som jej ukazal tu malu medzeru a kedze vyštudovala elektrotechnicku skolu tak to ihned hodila do koša😂
Mám doma 3 tieto nabíjačky , používam ich maximálne na testovanie mojich vyrobených somarín , keby som ju odpálil tak to neni taka škoda 😂😂😂👌
Often the current value is incorrect on these devices.
Just ask the cat, it's a sweetheart.
Do you move the cat in on purpose?
For sure he did.
Have you ever seen a charger that exploded? Believe me, it's not nice :D loud bang, melted plastic and terrible smell in the whole house
Surprisingly, I don't. Cats naturally tend to assist people while they work. They don't want to miss the fun :). And of course, the cardboard bench feels warmer than other surfaces. Cats always look for warm spots. White paper and other white areas trick cats into thinking that sun is shining there. That's why the cat always wants to sit on the schematics.
always good videos 10q.
european outlets are weird but they are the second safest outlet and plug
ttv. btw weird? They are clean looking and modern wdym lol
Why second safest?
because the contacts are not isolated
@@adamoneilwilliams7308 What do you mean? There is plastic on the half of the contacts. (Maybe I understood something wrong English is not my first language).
And which are first?
I love to learn about switching circuit with you as teacher. You explain that very clearly. Many thanks, I subscribed to the channel.
EVEN MORE SALT!!!!!
110 000 odběratelů jak vidim tak se ti daří, jen tak dál :)
this dodgy usb chargeeeeeerrrrrr
I like these series like you
Sir festival laser light repair video
Wait... I have the same... (and I use it right now)
Then you'll know what to do ;)
Always excellent, informative tutorials with a hint of humour, brilliant.
Crazy... It says 1A because it's a fake Apple charger, except it's the American design for iPhones. In Europe, we have a flat one with the little triangles at the side so it would fit perfect in a 2-prong European outlet (like some extension cords / power strips have). They just put European prongs on it, but the cube design is for the Japanese / American / Canedian market. Still incredibly dangerous. Unbelievable they can sleep at night knowing they made / sold this. A woman once got electrocuted when picking up her iPhone (back when they were made from aluminium).
Sweet dreams are made of this
Who am I to disagree?
I travel the world
And the seven seas,
Everybody's looking for something.
Some of them want to use you
Some of them want to get used by you
Some of them want to abuse you
Some of them want to be abused.
Sweet dreams are made of this
Who am I to disagree?
I travel the world
And the seven seas
Everybody's looking for something
Hold your head up
Keep your head up, movin' on
Hold your head up, movin' on
2.0A
If you find something like a cube shaped wall adapter, don't buy it! I warn all of you!
voice also dangerous, lost a few brain cells
Average design-crap. Nowadays, to (almost) everyone, a small and sterile appearance is much more important than actual safety and functionality.
Not being mean, but you have the stereotypical "Norse" or "German" voice. It's funny.
Nice Dan
So, you told that flyback topology uses ferrite core with air gap.
But, what will happen if I use a core with air gap in half bridge or push-pull topology?
It will probably still work, but there will be much more of inductive current, causing more losses in the switching transistors. The air gap reduces the inductance of the windings.
Ok, so it will be better not to use that core in half bridge topology SMPS. Thank you for the response.
I would then build a flyback power supply (1000w).
Ah the old-school USSR electronics tools.
This transformer look much better in most cheapo USB adaptor.. by the way what is doji?
I wish I could go to the same school of electronics as you. Brilliant video.
The funny part is that I didn't go to any school of electronics ...
What?! No way! How did you obtain this vast knowledge about electronics
I want to see that computer PSU!
The pins in the Euro plug are bent inwards. These are straight. This is no standard plug. In Euro plug the pins are 4 mm when others have 4.8 mm.
Useful video 👍
This charger is way too dodgy, even it's schematic is lying. I see right here that there's a cat on the schematic but when you buy it, there's no cat there. That's infuriating!
Help me with blown thermistor, capacitor & fuse. What causes to blow these parts
imgur.com/gallery/gRh5gLy
i love when he said "That's quite doggy".
please teardown a xiaomi wowstick
Hi bro
I don't know why people buy CHINA scraps ?
Give ur cat some milk before u make other utube vids. It looks hungry.
i like ur cat can u pls make a video about it?
I wish
Amazing work, well explained! But the cat does not approve this design! It is not cat safety :))
Better Transformer but less then 1 mm is not good, nice Video Thanks 😊
I'm missing the DODGY! stamp at the end of the video ;)
What is flyback polarity?
That's the polarity of the voltage on the windings when the transistor is off :). The opposite of the forward polarity.
@@DiodeGoneWild thanks for information.
Keep making videos, I love your talking style.
Love from India 😍
Thank you for your very interesting videos, good work and explanations! And I'm a big fan of your Czech-accented English speaking! ;)
Na ten PC zdroj se těším 😀
I want to a story about a well known make of dry cabinets that often failed.
@DiodeGoneWild -
*Your dodgy (death-) adapter with E+F plug can be taken for comparison* , it´s input side should fit into *Schuko* German style sockets , if the Cube shaped charger is bigger in any dimension it will not fit into Schuko socket
*This Cube shaped charger should fit into USSR sockets (if the pins are not to fat)*
i.etsystatic.com/14645439/r/il/7a35a2/1543029658/il_794xN.1543029658_a7di.jpg (USSR multi-way socket)
TIPP: on ebay(.de) you get cheap (new or) used (even rewirable) German sockets for your testing
example: www.ebay.de/itm/2-oder-3-fach-Aufputz-Schuko-Steckdose-Weiss-Hergestellt-im-EU-16A-CE-Mark/282960657869?hash=item41e1c4fdcd:m:mii41Dfomof7kRE7yoxT5pw#shpCntId ("3-Fach" variant) *with cheap shipping to Czech Republic* & even accepts Paypal - I have not found a Czech "ebay" yet.
You could also use a "Skross" variant travel adapter (with Schuko socket) for testing ( & during travel)
Example aukro.cz/skross-cestovni-adaptery-pro-cely-svet-6939003459 ( 550 Kč / 21,30 € )
I like your cat
这个在我们这边卖RMB10元。 LP3773可以做到5W。这个可能是变压器不太好的原因导致压降很大。这种东西不要看外表，价格就决定性能指标。中国制造有很多东西，廉价的，高品质的，你可以去常识一些例如品胜之类的用品质取胜的产品。
In belgium we also use the exact same type of socket ;)
Hey dan , where can i donate you a quite dodgy charger?
I think the plug is for Indian market
Chinese electronics, we give you what we want, safety? what's that? and lie about the specs.
Hahaha beer fire extinguisher!!!
Diodegonewild is so retro he still uses equipment that was made in a country that doesn't even exist any more ;)
1:41 thats plug is in my country ( Indonesia )
0:06 I thought you are going to take a look at your cat 😂😁
Amazing.... we would have never known.. Thank you
(I don't know which one is COoLer, your CAT or CRO) 🇺🇸❤
be carefull with that fire extinguisher man
At first I found your singing (intonation) annoying but you really do explain things very clearly. I kind of like your singing now. Thumbs up, Subscribed.
this dodgey usbee charrdgerrrrrrrrrrrrrrrrrrrrrrrrrr
Well, what do you expect for a $1-2usd power supply?! The old adage "You get what you pay for" certainly hold true, especially with cheap China crap. :D
I have a charger with 4 usb ports
Can someone translate for me?
The primary current sense resistor is not just for short circuit protection. It may be for current mode control (simple compensation network). This allows for pulse by pulse current limiting . The control has actually two loops - innermost current control loop, terminating the on state by reaching a current target, defined by the outermost voltage control loop error amplifier, comparing the voltage feedback with internal reference.
Greetings everyone. 6:17 ``it´s top secret! don´t show it or they assassite you!´´ Listen to your cat !!! he knows what he says. Thank you for explaining how these "contraptions" work. all care is little. success.
He can fit in Swiss plug or italian plug
I wanna see it explode.
Do a video on EMI filter!
Rektifier. It rekts things... I guess
It probably won't fit in a Schuko socket either, at least not without damaging the case of the "charger" with the ground contacts.
Like :44 comment :11 view :328
Uploaded : 9minutes ago...
hello bro my charger Makes Weird Noise "zzzzzz", can we eliminate it? where the sound came from
put an optoisolator. and then join the 2 low and high voltage boards with 4 thick wires. it's a stupid thing. in my opinion!!!
Hye bro please make some video on tec peltier Moodle. Is it suck compare to other cooling module like freon gas air conditioner
Is there any charger that really has the 3a ?
Some of those switching chips incorporate a built in snubber, using a high voltage avalanche clamp to limit the turn off voltage of the power switch. As they are generally low power, this does not increase power dissipation in the chip too much, but saves on external component cost.