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QC3.0 is the new standard for charger used by many companies, and therefore we get lots of compatible power banks and wall chargers. They deliver up to 12 volts and later up to 20 volts. And the voltage can be adjusted. Sounds like ideal for a Lab or a Mobile power supply. But unfortunately, the standard is proprietary. So let’s hack it using an Arduino Mini or an ATtiny.
The old USB chargers were able to deliver 5 volts and around 2-amperes max. The new QC quick charger chargers provide up to 12 volts and 2A peak. And you can change the voltage on the fly. Sounds interesting and dangerous! I do not want to charge my trusted old iPhone with 12 volts. I assume this would not be accepted as a warranty case by Apple…
Links:
Vince's blog: bit.ly/2Pf9DbM
QC 3.0 charger: bit.ly/2KKFdh3
QC 3.0 Power Bank: bit.ly/2JSwysr
QC tester: s.click.aliexpr...
QC3 library: github.com/vde...
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Опубликовано:

29 сен 2024

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Комментарии : 218

@tonybell1597 5 лет назад

Thanks Andreas. Simple concise and extremely useful......

@AndreasSpiess 5 лет назад

Thank you!

@tengelgeer 5 лет назад

Cool to see my work is still kind of used :D I made QC2Control on which QC3Control is based :)

@AndreasSpiess 5 лет назад

I did not follow the whole route of contributors. So your work was very important. Thank you!

@dhruv_195 Год назад

I was trying to make a fast charger, I got a power supply of 9V and 3 amps still no fast charging. Thank you for this explanation it was of great help.

@AndreasSpiess Год назад

My pleasure!

@Argosh 5 лет назад

Couple of days ago we had a conversation about this exact topic on the electronics discord. Thanks for your in depth look and explanations!

@AndreasSpiess 5 лет назад

Just in time! You are welcome!

@jackpatteeuw9244 5 лет назад

I love your little "hand" [pointer on the 'scope !

@AndreasSpiess 5 лет назад

It is from my wife.

@MaxintRD 5 лет назад

Another great video. Thanks! Now I know what my next project will be once I have a QC 3.0 charger...

@AndreasSpiess 5 лет назад

I hope my findings will be of use then...

@alaskawoodman 5 лет назад

Some pretty impressive engineering. Thanks for this.

@AndreasSpiess 5 лет назад

As usual I was able to stand on the shoulders o others :-)

@jstro-hobbytech Год назад

Ive ordered a bunch of gan chargers on sale to see if i can hack something smaller than having meanwell supplies all around my lab in enclosures powering my led projects. Ill give the led stuff away with a meanwell but it seems the more shelving i build the less i have haha

@AndreasSpiess Год назад

These GAN devices are really small for their power!

@xXTheMysteryXx 5 лет назад

Thank you. That will be my next project!

@AndreasSpiess 5 лет назад

You are welcome!

@electronic7979 5 лет назад

Useful video 👍

@AndreasSpiess 5 лет назад

Thank you!

@rarbiart 5 лет назад

i had been looking for QC3-Client-Chips since months in order to save some regulator overhead.

@AndreasSpiess 5 лет назад

I am not sure if they built such chips.

@Cptnbond 5 лет назад

Thanks and useful as always.

@AndreasSpiess 5 лет назад

You are welcome!

@jeanyvespochez 5 лет назад

nice interesting video, Andreas, as always. What did you use to draw the schematics on this video ? thanks.

@AndreasSpiess 5 лет назад

EasyEDA

@leogray1091 5 лет назад

The interesting thing is the simple protocol. This is too simple, but I think it will work just find as long as you put on your own negative feedback (or use a volt meter and your brain for feedback control lol) Also, I guess probably some Chinese company had already come up with some cheap variable power supply based on this.

@AndreasSpiess 5 лет назад

Maybe. Would be ok for me. Because it saves some work ;-)

@isprithul 5 лет назад

I was thinking of doing something like this just a few days ago.

@AndreasSpiess 5 лет назад

:-)

@davinderc 5 лет назад

Hi Andreas, I recently suffered some setbacks from not paying attention that an Ansmann powerbank I bought used QC 3.0 and then remembered your video. After looking around a bit more, I found this chip that seems to officially explain the QC 3.0 standard (or at least provides a state diagram that shows how the chip itself works): www.onsemi.com/pub/Collateral/NCP4371-D.PDF I thought you might find it handy to have or even add to the video description.

@AndreasSpiess 5 лет назад

Thank you for the link!

@hoyw25 Год назад

Arduino uno has analogue output pin e.g. pin 10 and pin 11, can we use such pin to output 0.6V, 3.3V for D+ and D- instead of using the resistor circuit to step down 5V to 3.3V and 0.6V?

@AndreasSpiess Год назад

_The Arduino UNO has no analog output pins. These pins are PWM pins. (Google PWM if you do not know what it is)

@hoyw25 Год назад

@@AndreasSpiess oh! I see. Thank you.

@f1ggyc 5 лет назад

Can you try hack mediateks fast charge? it's very obscure and the chargers are rare and expensive but my sony xa1 ultra only supports that for fast charge

@AndreasSpiess 5 лет назад

Maybe I will do PD in the future. But no exotic standards. They will disappear.

@RicardoPenders 4 года назад

Where did you hide the GitHub Library for the Arduino and where is the information on your website? I've gone through your whole GitHub repository and I also searched your whole website but what you're showing here in this video is nowhere to be found, I really wanted to use the Arduino Library so I'm very disappointed that it's not there anymore. Best regards, Ricardo Penders. 😠👎‼️⁉️⚠️💣💥

@AndreasSpiess 4 года назад

The address of the library was visible in the video: github.com/vdeconinck/QC3Control. I now addid a link to the description.

@gkdotclass 5 лет назад

Would be worth saying there is real standard way of doing this which is using USB PD (Power Delivery) specification which doesn’t involve these rubbish Qualcomm proprietary hacks

@cbm80amiga 5 лет назад

Exactly - and now most small laptops are powered using USB Type-C PD which is really smart standard. Unfortunately wall chargers are still very expensive, much more than in case of QC2/QC3

@gkdotclass 5 лет назад

cbm80amiga Xiaomi sells a good 65W USB PD adapter for about $15, I wouldn’t trust anything cheaper at those power levels plugged into mains, some horrendous lethal designs out there...

@cbm80amiga 5 лет назад

@@gkdotclass$15 for a project worth $8 in parts seems to be not very reasonable :) Of course for expensive laptop or phone I wouldn't risk too. I think Andreas goal is to unify power supply for a project.I just purchased such cheap QC3 wall adapter for my project with 12V LED strip. I hope it will work.

@AndreasSpiess 5 лет назад

In electronics, there is always a better thing on the horizon! The art is to chose what fits best for the moment. PD for me is still too expensive. I think QC3 can be useful for a power supply for the moment.

@TofuInc 5 лет назад

Things to note here: QC is not a standard, It's a proprietary technology from Qualcomm. QC3.0 and below have no protection for overloading the cable, they just send power. No QC version is USB-IF compliant. On the other hand USB PD is a standard by USB-IF. A 30+ watt USB PD charger can be purchased for less than $20. There are also many manufactures producing USB PD ICs that could be easily integrated into a cheap programmable power supply.

@AndreasSpiess 5 лет назад

In my world, standards can be open or closed, they are still standards if they are accepted by different parties. And a charger never decides how much current flows across a cable. It only offers power. According to Ohm's Law, the resistor of the power sink (e.g. Smartphone) decides on the current (at a constant voltage, which is the case here). No difference to PD here. But maybe I will also do a video on PD in the future. Then we will see the differences.

@TofuInc 5 лет назад

@@AndreasSpiess A charger can supply more power than a cable can support and if the device can use that much power the cable can become overloaded. With PD they have a chip in the cable that that tells the charger the capability of the cable.

@Mario-yt7ni 5 лет назад

Very good video! Thank you! Can you do that synonymous for USB-PD? So QC4.0 .. That would be great! I want to build a charger for my laptop (20V, 3A) ... Thank you!!

@AndreasSpiess 5 лет назад

QC4 is only the integration of QC and PD. So no big change on QC. Maybe I will look into PD when it became way cheaper.

@Mario-yt7ni 5 лет назад

@@AndreasSpiess yes, PD is still very expensive :( I'm curious how it continues :)

@AlfieMakes 5 лет назад

Expensive how? Because of the cables and sockets?

@MikeTrieu 5 лет назад

@@AlfieMakes Because of de facto industry momentum for Qualcomm's proprietary Quick Charge format and less economies of scale for USB-PD components (although Apple's adoption is certainly helping there).

@AlfieMakes 5 лет назад

@@MikeTrieu but it's an open standard, you can implement it yourself, and if you make a quick search you can find tons of chargers with the standard. Well I don't know, most of the devices I own have it, and I didn't even know about it until a week ago when I started researching for a project I'm interested in.

@crazytom 5 лет назад

"nothing can be destroyed by offering more current". Lithium ion chemistry is extremely sensitive to the current. Charge and discharge.

@AndreasSpiess 5 лет назад

Offering and consuming is not the same. Smartphones have protection circuits built-in.

@MikeTrieu 5 лет назад

Try to analyze a USB Power Delivery 3.0 charger with Programmable Power Supply capability next. That and QC4 will probably be closer to a generic power supply for what your need.

@AndreasSpiess 5 лет назад

Maybe I will do a video about PD in the future. QC4.0 seems to be more-or-less a combination of the two standards.

@bardenegri21 5 лет назад

Great stuff, much clearer than other videos on this subject.

@AndreasSpiess 5 лет назад

Thank you!

@GRBtutorials 5 лет назад

Erm... the ATtiny85 working voltage is the same as the ATmega328, 1.8 V to 5.5 V. There's no need for a 3.3 V regulator.

@AndreasSpiess 5 лет назад

And if you switch to 12 volt?

@GRBtutorials 5 лет назад

@@AndreasSpiess Yeah, but there's the same problem with any other microcontroller.

@AndreasSpiess 5 лет назад

The mini has the regulator on board. This is why I made the comment

@DO7DH 5 лет назад

Great video, extremely useful. Many thanks!

@AndreasSpiess 5 лет назад

You are welcome. Glad it helps!

@JeremiahONeal-t8y 5 лет назад

Just a quick question. Could this protocol be used maliciously by hackers wanting to destroy phones? For example, if places like airports and fast food cafes add QC3.0 chargers in their stores and hackers sabotage the ports to deliver more voltage to non QC3.0 enabled smartphones.

@AndreasSpiess 5 лет назад

I do not think so

@koffibanan3099 5 лет назад

Hey Andreas, I watched this video when it came out and thought it was great. Today I wanted to revisit this, but youtube search didn't bring this video up even when I typed "quickcharge andreas spiess". So maybe you should add the words quick charge to the title instead of QC? To get more hits to this fantastic video? Anyway, thanks a lot for the clear explanation and the ton of info!

@AndreasSpiess 5 лет назад

Thank you! Maybe it was because you wrote quick charge in one word? At least I adapted now the words.

@herik63 4 года назад

The old iPhone 8 and the iPad Pro 10.5” are capable of pd power, just tested with the new pd power supply (18w) of the iPhone 11 Pro,

@AndreasSpiess 4 года назад

Good to know. Thanks!

@jstro-hobbytech Год назад

Thank you. Youve given me great ideas.

@eifel810 5 лет назад

interesting can be comparing with USB PD (power delivery)

@AndreasSpiess 5 лет назад

It is much cheaper ;-) No, in reality, PD has more possibilities, but you have to have chips on both sides. Maybe I will have a look into it when it became cheaper.

@GRBtutorials 5 лет назад

@@AndreasSpiess It's a bit more expensive, but chargers also have more power, so it's understandable. I saw a 45 W one for 25 €, which is pretty cheap IMO.

@AndreasSpiess 5 лет назад

@GRBTutorials I already placed some orders ;-)

@berndeckenfels 4 года назад

Gee, I would have expected digital protocol. Does USB PD actually use USB protocols?

@AndreasSpiess 4 года назад

QC is much easier than PD. Hacking PD is not as easy because it is far more complicated...

@srower666 4 года назад

i really wonder, can i use direct 12volts \ 2-3 A to charge my powerbank/smartphone which is QC2.0 \ 3.0 capable? for example, 12-V (lead-acid) car battery directly connected to usb +|- pins of my QC3.0 smartphone, will the phone burn away, or gonna charge normally?

@AndreasSpiess 4 года назад

I think you have to watch the video again. Otherwise your phone will be destroyed

@srower666 4 года назад

@@AndreasSpiess taken risk and tested it, when voltage goes over 6.5 volts. phone turn off charging. but it least it doesnt burn

@balajid9024 3 года назад

Good explain ....can you do for PD .....it will very usefull ....thanks ....

@AndreasSpiess 3 года назад

PD is much more complicated...

@BoloneyPanda 5 лет назад

the 1117 has a bigger quiescent current draw than what the attiny draws, it's horrible regulator :( just saying.

@AndreasSpiess 5 лет назад

You are right. For low power designs, there are much better choices. But here we have mains voltage.

@BoloneyPanda 5 лет назад

@@AndreasSpiess Yeah for some reason when i see QC standards my brain goes instantly into power banks. but you are right for mains connected projects these regulators are fine.

@electron-1979 5 лет назад

If you program an ATTINY85 with Arduino IDE, isn't it as much an Arduino as a 328p? Thumbs up!

@AndreasSpiess 5 лет назад

The ATTinies are not easy to program and only have very limited resources compared to a 328p

@electron-1979 5 лет назад

@@AndreasSpiess I find them easy peasy to program ;)

@ATS3788 5 лет назад

Hallo Andreas. Wie jeder weiß ist die Arduino Original IDE einfach nur scheiße. Ich habe eine Zeit lang www.baeyens.it/eclipse/ benutzt. Seit gut einem halben Jahr benutze ich vMicro www.visualmicro.com/page/User-Guide.aspx?doc=Visual-Micro-Menu.html mit Microsoft Visual Studio und ich bin total begeistert, weil man das dynamische Library Management von der Arduino IDE hat und den Vorteil der Syntax Ergänzung und Preview und all die stärken der MVS. Eine Liezens ist auch sehr günstig. Give it a try. Die allerbesten Grüße in die wunderschöne Schweiz.

@AndreasSpiess 5 лет назад

Ich hatte Visual Micro schon vor Jahren lizenziert. Dann haben sie den Support für die ESPs verschlafen und mich verloren. Für meine kleinen Projekte ist der Editor nicht so wichtig. Und als RU-vidr muss ich sowieso bei der IDE bleiben. Sonst interessiert's niemanden mehr.

@donpalmera 5 лет назад

I'm not sure why they didn't just make the charger a USB device and have the phone talk to it over normal USB endpoints to configure it. :/

@bardenegri21 5 лет назад

Price

@donpalmera 5 лет назад

@@bardenegri21 usb->serial bridge chips are down to the tens of cents range now and I think most of that cost is the chip packaging.

@bardenegri21 5 лет назад

@@donpalmera but then you still need logic to interpret the data, that's a microcontroller, and then you still need the actual dc-dc converter in the qc chip, and the protection circuitry. So you're actually adding a pretty big microcontroller and a uart bridge chip to what's already in this qc chip. It's much cheaper to do it with simple logic, comparators and transistors.

@donpalmera 5 лет назад

@@bardenegri21 Your QC charge controller will probably be some sort of 8051 based thing anyway. I brought up that there are cheap usb->uart chips because it shows that stuff is cheap now. Those chips are all based on a microcontroller. Holtek basically sells the same chip with different software for usb->uart, usb->i2c etc. So doing this via USB endpoints that map to your regulator control etc shouldn't be expensive or all that hard. Maybe getting a usb vendor id and paying membership fees is the hurdle to doing it.

@user-vn7ce5ig1z 5 лет назад

The logic required to make this work isn't going to be in all controllers, so it's not like by being clever, they make it so that you can use all chargers, so people will still have to get QC3 by using only special chargers. Therefore, there's no point in saving a few cents or even a dollar or two for one, or maybe two QC3 chargers, especially when the charger is likely already tens of dollars.

@yagoa 5 лет назад

iPhone shouldn't be a problem since it supports pd

@AndreasSpiess 5 лет назад

AFAIK only the newest support it.

@trifonovmikhail7803 5 лет назад

I was wondering if you know that voltage of qc 3.0 directly connected to li-ion battery? Or it's transform from 12-20v into 4.2 and change by more current. So i'm intetsting, how power on charge 12v and 2a (24w) charging li-ion cells. Thank you in advance.

@AndreasSpiess 5 лет назад

Li-po batteries need a special charger circuit which usually runs of 5 volts. If you just connect 5 volts or more to a Li-ion it can explode after a while.

@trifonovmikhail7803 5 лет назад

@@AndreasSpiess so this charger, just step down voltage to 4.2v and charging with more power?

@AndreasSpiess 5 лет назад

No.

@trifonovmikhail7803 5 лет назад

@@AndreasSpiess ok, i'll try to reprhrase. How li-ion battery charging on 12v or even 20v using quick charge ? How it's works?

@bgable7707 4 года назад

EXCELLENT, "Write up", this possibily explains the issue with the LG G4 phone overheating. This occur when I was charging my phone in the car and had "maps" running. It sounds like the QC2 on the device was not able to balance the charge and phones power needs at the same time. It is a known fact the phones could permanently lock up if they got overheated. As hot as mine had gotten several times, I'm suppressed that it didn't. And yes, there is a hack out there to recover the phone if you are able to flow the chip apart and reset it. Please keep up the great work! Ken O would be proud.

@AndreasSpiess 4 года назад

I have an Iphoone which does not use QC nor PD ;-)

@binershock 5 лет назад

Thanks as always. It seems like there is not really any signaling of the amperage anymore. Amperage was the ONLY parameter that the Apple standard was signaling, but now with QC, if your device does detect that QC2 or QC3 is available, then your device should expect at least 18W. No other signals about power.

@AndreasSpiess 5 лет назад

The device always has to limit current (according to the % charged). The Apple standard was more about protecting the charger than the smartphone, I think.

@nunolourenco1532 5 лет назад

Good stuff! In your research do you find if VOOC (or dash charge; oneplus and other Chinese manufacturer use it) works the same way? Well, not exactly the same way as they use low voltages and higher amperage to keep the heat away from the phone. Also, I think there is an additional data line in VOOC cables. That said, my initial question wasn't that smart... Still, I know there is an adapter like the last one you shown that converts QC3.0 to VOOC (5V/4A), which is great as there are (?) no VOOC powerbanks on the market or are extremely hard to find - you could just convert a QC3.0 to one. I haven't bought one of those because I don't need that much of a mobile PSU.

@AndreasSpiess 5 лет назад

I did not look into other standards. And I did not see it is used frequently.

@williamschnl 4 года назад

correct me if I'm wrong. if for example i need 12V, i need to put +0.6V on D+ pin, and +0.6V on D- pin?

@AndreasSpiess 4 года назад

Yes.

@williamschnl 4 года назад

@@AndreasSpiess thanks for clarifying these. another thing, does it have to be step by step, from p0 to p1 and then p2, or i can just do it instantly from p0 to p2, to get 12V?

@AndreasSpiess 4 года назад

I do not think so

@williamschnl 4 года назад

@@AndreasSpiess i'm sorry, does it mean, i can do it instantly ? (from p0 directly to p2)

@misaalanshori 5 лет назад

My qc 3.0 power Bank got stuck on 12v and destroyed the data lines on the USB port of my phone....

@misaalanshori 5 лет назад

I didn't realize it was stuck at 12v because it was charging my phone like normal, I realized it when I was bored and plugged in a small WiFi adapter (I was bored) into it and it burned something inside the wifi adapter....

@AndreasSpiess 5 лет назад

Strange. The data lines never should get 12 volts, only VCC. So your device or plug was defective.

@misaalanshori 5 лет назад

@@AndreasSpiess I'm still not sure what happened but for some reason the data lines and the power lines was showing 12-13v on my multimeter

@misaalanshori 5 лет назад

Luckily my phone still charges normally while and after it was connected to 12v. I can't use it to transfer data though

@misaalanshori 5 лет назад

To this day its still stuck at 12v and makes a buzzing sound when on, I just use it to test small 12v devices and I could turn on 2 4w 220vac lights with an inverter.

@ATLaboratory 5 лет назад

Very very nice idea!! I love this kind of hybrid power supply(smps + linear regulator) and this is a very efficient way to build one of that:)

@AndreasSpiess 5 лет назад

And maybe with the PD standard, we will get up to nearly 20 V...

@ATLaboratory 5 лет назад

@@AndreasSpiess and also a good ammount of current!! Maybe in the future I will design some similar stuff, thank for sharing :) always greeting from one of your fans :)

@boblewis5558 5 лет назад

Nice one Andreas. I've been meaning to look into QC 3 for a while. None of my devices use it currently (!! No pun) but I have a couple of chargers and a power bank that have it so a bit of hackability is always useful.

@AndreasSpiess 5 лет назад

That's what I also thought ;-)

@user-vn7ce5ig1z 5 лет назад

People nag Microsoft for doing its own thing, ignoring standards, and messing things up for everybody. Apple is no better. ¬_¬ Anyway, it's interesting to think about the challenge that designers face to figure out ways to get new things to work.

@AndreasSpiess 5 лет назад

Somebody told me: "It is wise to distinguish between things you can change and those you cannot. And only try to change these you can". This video was my contribution today ;-)

@9TheTheo 5 лет назад

Thanks, you are great. Can you do same for Pump Express and how to combine both pump express and qc in one charger?

@AndreasSpiess 5 лет назад

Maybe I will do one for PD. I have no plans for Pump Express

@sethrd999 5 лет назад

Great video Andreas!, totally demistifies this technology, interestingly I have a need for this very thing so thankyou for being concise ( as usual ).

@AndreasSpiess 5 лет назад

You are welcome. I have to admit, it did not look as simple when I started ;-) It took me some time to understand it.

@hallo_matthew7627 5 лет назад

Thank you for this extremly helpfull content! I'm searching for so long time for something like this!because I want to build a solar QC charger for my Phone&power bank

@AndreasSpiess 5 лет назад

You are welcome!

@cheetahkid 5 лет назад

Thank you for the video, good ideas in my head. Bench Power Supply., that what you are thinking and same with me.

@AndreasSpiess 5 лет назад

This was the idea of this video...

@AlfieMakes 5 лет назад

Awesome video! Can we get a video on the open USB PD standard? It's free to use and should be interesting to look at how to do this.

@AndreasSpiess 5 лет назад

Maybe I will do one in the future.

@mariaselectronics3888 4 года назад

So, could you add a small voltage reference to the D+/D- to get the desired voltage from QC3?

@AndreasSpiess 4 года назад

I do not know more than shown in the video.

@juri14111996 5 лет назад

just use usb pd, up to 5A at 20 V.

@AndreasSpiess 5 лет назад

PD needs a chip and maybe is not easy for makers... But it is the future.

@davidmcclare443 5 лет назад

hi the quick charge standard has been known to fry ps4 controllers i blame sony for requiring data to be sent for the controllers to charge eg old chargers with shorted data pins dont charge

@AndreasSpiess 5 лет назад

I am not in gaming so I do not know :-(

@miniwarrior7 5 лет назад

Whats the point of 9,12 and 24 volts all to goto a 4v lithium battery that depends on CC and CV charging no higher than 4.2v

@AndreasSpiess 5 лет назад

For example motors or operational amplifiers need higher voltage.

@miniwarrior7 5 лет назад

@@AndreasSpiess qualcomm designed this qc3 standard into their mobile handsets CPU. I just don't understand why

@AndreasSpiess 5 лет назад

Because they wanted to charge their phones faster. Higher voltage means less current. And longer cables can be used

@miniwarrior7 5 лет назад

@@AndreasSpiess as I understood lithium batteries you cant charge them above 4.2V? So is this all just for clean high power transfer to the device to then later be regulated down again for charging?

@AndreasSpiess 5 лет назад

Yes

@DougHanchard 5 лет назад

Thank you for making this video. It opens up several interesting paths to explore why several smartphone manufacturers that implemented USB-C, may have battery charge problems that have fried their batteries and internal charging regulator circuit. The Moto Z Play (version 2) comes to mind. They offered a regular charger and "turbo" charging option. Adding to the complexity, they offer a magnetically attached battery pack. The circuit board you made looks very intriguing. Did you make a video how you designed and put it together?

@AndreasSpiess 5 лет назад

So far I always thought, all other RU-vidrs made JLPCB videos and I do not need to do an additional one ;-)

@DougHanchard 5 лет назад

@@AndreasSpiess There are some good videos out there. But you are your *own* engineer, with unique communications experience that is worth everyone's time to learn from.

@ifithegr8 5 лет назад

I am waiting for you to start working on nrf52, so that I start working on it. Keep up the good work ...

@AndreasSpiess 5 лет назад

That might take a while :-(

@rouuuk 4 года назад

I looked for this stuff.. I'm happy i found you. Well delivered

@AndreasSpiess 4 года назад

Glad you enjoy it!

@GnuReligion 5 лет назад

Nice! All very interesting. I have blown a number of AMS1117-3.3 at 12V, so careful! Perhaps protect it with a current limiting resistor.

@AndreasSpiess 5 лет назад

Strange. They should go up to 15 volts :-(

@GnuReligion 5 лет назад

@@AndreasSpiess 15V, really? It is possible I do not have genuine parts. Should make my own ElectroBoom vid on this.

@Cypeq 4 года назад

Great video I thought it will be simple, I didn't even expect it to be this simple.

@AndreasSpiess 4 года назад

PD is more complicated...

@whollymindless 5 лет назад

"... Can't be remote controlled" he says. Sounds like a challenge

@AndreasSpiess 5 лет назад

I think I solved it.

@PhG1961 5 лет назад

Excellent video and again very well explained. Thnxs for sharing.

@AndreasSpiess 5 лет назад

You are welcome!

@SuperBrainAK 5 лет назад

wow that was explained very nicely! thank you!

@AndreasSpiess 5 лет назад

You are welcome!

@MikeKranidis 5 лет назад

Just perfect. Very nice information, thanks Mr. Spiess !

@AndreasSpiess 5 лет назад

You are welcome!

@cmuller1441 5 лет назад

5:10 How can you go from P0 to P1 with d+ and d- shorted together by the charger? Isn't it P0 then P2 and when the charger disconnects the 2 lines it's P1? There's also a difference between what you try to push on whose lines and the result depending on how hard you try (the impedance of the voltage source) if they are shorted together.

@AndreasSpiess 5 лет назад

You have to think without the charger in place. The Smartphone signals. But of course, you are right as soon as the charger is connected you will measure the same voltage on both wires. But as soon as the connection opens you see the difference. If you would supply P2 the charger would open the switch but fortunately would not immediately go to 12V. You always have to go to P1 to switch it into QC mode.

@cmuller1441 5 лет назад

@@AndreasSpiess I know that. The question is that you can't go to P1 if the charger is connected and shorts the 2 lines. If you try you will just get in between depending how hard you drive the lines. The problem is then that the charger cannot detect being in P1 before stopping the short because if it sense the 2 lines (connected together) he will always see the same voltage... So the conclusion is that the 2 ways communication is a bit more complex that what you described... I guess with a 4 way oscilloscope with small resistors on the data lines you could probe each side of the wire and see when the charger shorts the lines or not. Anyway it seems to work. I have a few blitzwolf chargers and powerbank and 2 phones that can do high speed charging. One Motorola and one Samsung. The chinese charger can charge both at 9v but the Motorola charger won't charge the samsung fast... So it seems that there are variants in the protocol. Also I think I read the original article some time ago and the guy was not using exactly the voltages he saw when he reverse engeneered the protocol but it was working.

@AndreasSpiess 5 лет назад

As I mentioned, I do not know the exact voltages. I tried the power bank and the Charger and it worked. The guy I had the design from also did some tests, which also worked. That is all I know. And I am sure viewers will come back if it does not work for them ;-)

@InfiniteQuest86 5 лет назад

Your videos are always outstanding! Thanks!

@AndreasSpiess 5 лет назад

Thank you!

@avejst 5 лет назад

Interesting project 😀 Thanks for sharing 😀👍

@AndreasSpiess 5 лет назад

You are welcome!

@Arek_R. 5 лет назад

There are dedicated QC handsake IC which would make it easier and safer. Like IP6518

@AndreasSpiess 5 лет назад

Maybe. I did not find an English data sheet. Do you have more info or projects done with this chip?

@Arek_R. 5 лет назад

It's in my "dongle" from ebay that triggers few voltage levels up to 20V(PD) by pressing a button, basically that IC I mentioned + some very small uC like attiny or something. It's this one: www.ebay.com/itm/UPD005-PD-to-DC-spoofing-detection-PD2-03-0-fast-charge-trigger-QC4-polling-HID-/273424369188

@AndreasSpiess 5 лет назад

Thank you for the link!

@nogrend 5 лет назад

Thank you for the video, great work.

@AndreasSpiess 5 лет назад

You are welcome!

@isidoromaich7226 5 лет назад

One thing leads to another🎵

@AndreasSpiess 5 лет назад

:-)

@FindLiberty 5 лет назад

EXCELLENT - thank you

@AndreasSpiess 5 лет назад

:-)

@Shenepoy 5 лет назад

Do a video on QC4 and USB-PD

@AndreasSpiess 5 лет назад

Did you see anything else than it is PD compatible? The QC standard seems not to change.

@Shenepoy 5 лет назад

@@AndreasSpiess ok what about usb pd i heard its more complicated to trigger and u can get up to 100w ( in real world and what available 45w~65w only )

@AndreasSpiess 5 лет назад

AFAIK you need chips for the protocol.