Dangerous cube-shaped USB charger with 2 ports

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

[@-yeme-]

Ive said it before but no one else on youtube explains switching power supplies this clearly

[@bashaaksema94]

Agreed

[@here2there880]

I agree. He had a really good 2 part video a while back that is just fantastic. Really simple easy to understand explanation.

[@OverfluxAerospace]

hey diodegonewild can you plz make a video about your homemade devices

[@Killerspieler0815]

@MA4DI - YES , it would be interesting how diodegonewild build his stuff

[@mohitsorout6669]

Yes, definitely

[@OverfluxAerospace]

@@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

[@Killerspieler0815]

@MA4DI - YES , again

[@czonczike630]

I like the clean schematic

[@ELECTROGYAN]

It is rare talent ❤️ Needs so much patience and multimeter continuity

[@pirataga]

Your channel is the greatest, I love your videos. This dodgy USB charger needs more saaaalt

[@23y75]

needs more saaaaaaaaaaaaaaaaaalt XD

[@s40s06]

More salt hahahaaha actually that water heater video where salt is poured in the container..

[@cheekibreeki904]

@@s40s06 I think "even more saaaaalt" has evolved into a local meme.

[@jkobain]

- And it doesn't explode, which is a good sign! XD

[@EliteHEAD]

I would like to see some video providing detail on magnetics (coils, transformers), i.e. why use air gaps, dynamic air gaps etc.

[@COBARHORSE1]

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.

[@OverfluxAerospace]

air gaps are used in transformer to prevent the core from magnetic saturation

[@Conservator.]

Very robust transformer. They have put 2 turns of isolating tape on the windings in stead of just one. 👍

[@TheSpotify95]

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. :)

[@lakiza55]

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.

[@philippe5394]

I love to learn about switching circuit with you as teacher. You explain that very clearly. Many thanks, I subscribed to the channel.

[@peteb2]

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.

[@mohitsorout6669]

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 KZbin You are the master of power supply 👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍

[@andiyladdie3188]

Yup, I agree.

[@isoguy.]

I wish I could go to the same school of electronics as you. Brilliant video.

[@DiodeGoneWild]

The funny part is that I didn't go to any school of electronics ...

[@jasonvoorhees3282]

What?! No way! How did you obtain this vast knowledge about electronics

[@richardhalliday159]

Always excellent, informative tutorials with a hint of humour, brilliant.

[@p23q]

Love the cat :-D. Also thanks for always reversing the schematics and talking so much about them. There is so much to learn!

[@surfacta]

That pc psu must be good, cant wait till u upload it. Great video mate!!

[@ajky1028]

110 000 odběratelů jak vidim tak se ti daří, jen tak dál :)

[@PureAudioTones]

I like your videos a lot, with schematics, explanation and your cat's contribution 🙂

[@jddr.jkindle9708]

We luv your fire extinguisher 05:30 .

[@electroniquepassion]

this cat really likes electronics 👍😄😳

[@floydmobile3325]

I like these series like you

[@Tim7475]

Your drawn schematics are legendary.

[@xerejuneseve6333]

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.

[@andiyladdie3188]

Awesome video! keep them going, I really look forward to see that atx PSU open.

[@ketanmorajker]

TILL NOW,YOUR CAT MUST HAVE BECOME A MASTER IN ELECTRONICS BY WATCHING YOU🔥👍😂🤣

[@volleswerkfullorganpower249]

I love this blogs. It teach me english and electronics. Thank you! Im from Poland 😀

[@sortofsmarter]

Great video, you have really helped me understand the principle operation of power supplies. thanks

[@kna60]

Thank you for your very interesting videos, good work and explanations! And I'm a big fan of your Czech-accented English speaking! ;)

[@billyponsonby]

Hooray! A new ‘Are you Kiddin’ me!’ video 😁

[@maxxsmaxx1901]

Superb demo and lecture ! Thank you!

[@PERCYBIBOL10]

*DIOOODDDEEE!!!* 😂

[@billgates9751]

I love his pronunciation !

[@plamenpetkov6958]

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.

[@aanarchyy7310]

This is great. It's like watching bigclive with a Czech accent. Excuse me while I binge-watch the rest of your vids.

[@gazaziho]

Thank you for spot lighting this piece. .

[@Tirdad1981]

Such a informative video. Thank you so much for sharing this.

[@SeanBZA]

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.

[@skinoku]

It isn't nearly as dodgy as I expected! I'd like to see also some ripple output measurements at different loads. Thanks for great video!

[@usefulelectronics]

To test the dodgy charger I have to use this dodgy adapter :) 1:47

[@cheekibreeki904]

*dodginess intensifies*

[@FaysalKhalashi]

Can't wait to see inside of the huge computer power supply...

[@TheCarArchives96]

Diodegonewild is so retro he still uses equipment that was made in a country that doesn't even exist any more ;)

[@crazyksp8344]

i love when he said "That's quite doggy".

[@MrMaxeemum]

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.

[@irfanjalal2010]

Good Analysis

[@Mark1024MAK]

Another excellent break down 👍😀

[@stephanc7192]

Always loves your videos

[@jkobain]

What an adorable cat!

[@bramvandenbroeck5060]

In belgium we also use the exact same type of socket ;)

[@shadkhan1624]

I LIKE YOUR ENGLISH🤗

[@-Crash-Nebula--]

Hahahahaja ha! !

[@sterrname5824]

be carefull with that fire extinguisher man

[@lukastevic4373]

I want to see that compuer power suply in next video, can you make video about it? Btw nice video as always.

[@rahimkvayath]

you are safety concious, like me.....its good, keep it up

[@adamoneilwilliams7308]

european outlets are weird but they are the second safest outlet and plug

[@aarriikknn33ll]

ttv. btw weird? They are clean looking and modern wdym lol

[@sebastianfischer429]

Why second safest?

[@adamoneilwilliams7308]

because the contacts are not isolated

[@sebastianfischer429]

@@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).

[@longdongsilver4719]

And which are first?

[@williamwong5627]

I want to a story about a well known make of dry cabinets that often failed.

[@electronic7979]

Useful video 👍

[@MohammedSadiqueAli]

I like ur cat 🐈

[@kabirahmedlaghari6897]

Nice Dan

[@zx8401ztv]

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 :-(

[@gumpi5]

What you've expected from a device that costs 1 or 2 $ £ € or whatever... That's the price of the copper windings :D

[@zx8401ztv]

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.

[@DiodeGoneWild]

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.

[@SpeccyMan]

... their teeth ...

[@zx8401ztv]

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 :-(

[@fuzzybobbles]

I only watch your videos for the cats. Everything else is a bonus. :-)

[@NebulaTornado]

Good job friend, you are the best professor with an excellent explanation! Hello to the F.B.I cat hhh

[@oldmanhuppiedos]

Often the current value is incorrect on these devices. Just ask the cat, it's a sweetheart.

[@prathikprashanth2932]

i cant wait for that computer power supply! BRING IT ON!!

[@octavmandru9219]

Thanks for your informative video

[@zUltra3D]

Chinese people: Let's make cheap chargers that only work with our adapters!

[@loganmacgyver2625]

Dodgy chinesium things are made for birth control. China has an overpopulation problem

[@jhndk7915]

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).

[@eflose]

Better Transformer but less then 1 mm is not good, nice Video Thanks 😊

[@tuxrandom]

It probably won't fit in a Schuko socket either, at least not without damaging the case of the "charger" with the ground contacts.

[@CraftAero]

5:30 Safety first Bro.

[@SzymekCRX]

Poland confirms mains plug type :)

[@mordimustafa1275]

can you explain how to control the current output in SMPS using the UC3844 pls

[@QDStrength]

I think load regulation should be covered in the datasheet

[@QDStrength]

I think load regulation should be covered in the datasheet

[@yrr0r244]

Some bridge rectifier chip can also have the fuse feature.

[@iProgramInCpp]

Ah the old-school USSR electronics tools.

[@a.lisnenko]

Good. Keep it that way.

[@tim0steele]

I'm missing the DODGY! stamp at the end of the video ;)

[@dreamfly555]

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".

[@mickp607]

Just love your beautiful cat 🐺

[@rahimkvayath]

excellent as usual

[@okaro6595]

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.

[@MassimoTava]

I want to see that computer PSU!

[@E-GaN]

0:06 I thought you are going to take a look at your cat 😂😁

[@Random_4400]

Hi! Love your videos!

[@John_Smith__]

Another good video and product "review" :)

[@驰骋-u2l]

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。

[@luminumlx2604]

this dodgy usb chargeeeeeerrrrrr

[@hafezgh1841]

thanks a lot man we appreciate it very much 🌺🌺 epic teacher

[@ukko9154]

Your plugs are wrong. That's why it didn't fit. Just kidding. 😄

[@TauCu]

As weller would say "The transformer *IS* the fuse"

[@anindyamitra5091]

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?

[@DiodeGoneWild]

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.

[@anindyamitra5091]

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).

[@ShroomLab]

Do you move the cat in on purpose?

[@gumpi5]

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

[@DiodeGoneWild]

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.

[@ovalwingnut]

Amazing.... we would have never known.. Thank you (I don't know which one is COoLer, your CAT or CRO) 🇺🇸❤

[@The_Hanter]

Na ten PC zdroj se těším 😀

[@syedjoynulabedin3849]

i love that cat,...

[@lez7875]

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.

[@nosafetyswitch9378]

How can one donate you devices to make a video with mate?

[@DiodeGoneWild]

What device would you like to donate? Contact me at [e-mail]

[@ankitjha8413]

cat want her charger back

[@spirit-teacher]

Hahaha beer fire extinguisher!!!

[@giuseppe.m1913]

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

[@bangadu_billa]

I enjoy your cat man. Someone should made one video with cat. ☺️☺️

[@orange11squares]

Amazing work, well explained! But the cat does not approve this design! It is not cat safety :))

[@microteam4]

Let's make a drink game. Drink every time he says "dodgy"

[@beleteshebabaw6785]

always good videos 10q.

[@koushiroizumi0]

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!