The general problem with USB-C is complexity and density. You need special chips to handle it and you need a very fine pitch on the circuit board to handle the connector.
The chips has to be developed first and must be fairly low cost for many applications, it may also be an extra chip in many cases for the next few years (For current only the chip can be avoided).
This means usb-c will first show up in high volume, high tech equipment with a fast development cycle, like phones.
When writing the above article I was very much in doubt about how much general usb/usb-c information to include, I hope the balance is acceptable.
Hmm,- it is directly copied from my source.-
I think itās just a translation errorā¦. I just re-read the article, and you are right. :person_facepalming:
However, the PD protocol can indeed be used with all the USB protocols (usb 2.0 and usb 3.1 gen 1 and 2. But only when they use the type c connector)
Unfortunately the article doesnāt say anything about resistor codingā¦ Only that the power is being ānegotiatedā between the 2 devices.
I know that the new type c cables will have a special microchip in them to be able to communicate with the device.
Not always, you have the following type C cables:
USB 2.0 without chip
USB 3.1 gen 1 without chip
USB 3.1 gen 2 without chip (I am not sure about this one)
USB 2.0 with chip
USB 3.1 gen 1 with chip
USB 3.1 gen 2 with chip
USB 3.1 gen 2 tunderbold with chip
And there is no marking on the cable saying what it is and you cannot see it on the cable (The old usb standard was a bit easier in that regards).
Barkuti, youāve been raiding my stash Iāve got twice that easily since Iām in the habit of grabbing all decent-looking wall-warts and USB cables I come across for free. Most are given away but my stash seems to grow faster anyway.
Good info on this subject as weāve come to expect from HKJ. While it was touched on, something Iād like to add is that like LiIon cells you want to use only good cables. With better products the supplied cables are usually good, but with budget products the supplied cables are sometimes a target for cost-cutting and they may not last long at all.
Among us dashcam hobbyists it has became well known that cheap USB charging cables are one of the most common trouble spots, leading to many different malfunctions. These devices usually need at least a full amp at the camera to work reliably with some needing more. Cheap cables oxidize quickly, conductors break with movement, and connections get dirty which can lower the current flowing into the cam and cause problems. A cheap cable can work fine when new but fail to deliver the needed current a month later even though it looks good and wasnāt abused. The good cables will long outlast the cheap ones so they are a better deal even with their higher initial cost.
Also mentioned was the possible degradation of batteries due to overheating. While the evidence is only empirical, dashcam users universally have problems with LiPo batteries in the hot environments that many are used in. These batteries can go bad in as little as a few weeks in the hottest climates. Good quality batteries last longer but itās hard to know the good from the bad as those who sell generic replacements rarely list the batteryās build source and itās not branded on the shrinkwrap like LiIon cells are. So Iād change HKJās āconjectureā to a near-certainty regarding battery damage through overheating.
Thanks. Very useful. Iāve been picking up bits and pieces as Iāve been going. Youāve filled in a lot of the many gaps I had left.
I need to get a little further along on my understanding of QC2. Iāve been waiting on some QC power sources so I can start experimenting.
I will say, I think ADB deserves a mention in the history of peripheral buses, especially since it was a universal (for Apple) serial bus, and Apple ditched it and went all-in on USB before most PC makers really committed.
My own box, a Arduino nano with a few resistors. I needed something that do not use power from the usb power and allows me to connect my load in a four terminal hookup.
Thanks. Thatās what Iām planning on doing since I havenāt found anything that someone else has already designed/tested for incorporation into otherwise dumb electronic devices.
Iām using Samsung smartphone and the charger came with it is the Adaptive Fast Charging type,
while using Blitzwolf QC2.0 wall adapter or QC2.0 powerbank, it seems unable to do fast charging, what am I missing and what should I do to enable fast charging?
As I wrote above it looks like that protocol uses digital communication on the D- pin, this is not the same as QC, but some Samsung phones also support QC. If your phone will not do any fast charging it looks like it do not support QC.
Iāve got twice that easily since Iām in the habit of grabbing all decent-looking wall-warts and USB cables I come across for free. Most are given away but my stash seems to grow faster anyway.