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Dual ended USB/Samsung flashdrive prototype

This is something I made as a prototype/proof of concept test for something I hope to make for my S2, but since I only have Tab OTG adapters around and no S2 ones yet I made the prototype for the Tab
Anyways, this is quite simple. Take a USB OTG adapter, strip it down to where you have wires sticking out of a 30 pin connector, find a tiny USB flash drive, strip it down, and solder the two together so that the USB plug is still usable. End result is a small USB flash drive that can connect to both a computer and the Tab (not at the same time, obviously)
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Were I to make a V2 of the Tab version I would have located the USB connector on the side - which was always the plan with the S2 one, just didnt bother wit the Tab prototype

The connector is NOT proprieatry, its a 30 pin PDMI connector. Read it at everyone's favourite encyclopaedia: http://en.wikipedia.org/wiki/PDMI
So basically you can just solder pins 1,2,3,5 to your thumbdrive and pin 4 to pin 2, and optionally solder pin 15 to pin 6 for high power and you're set. Saves money on getting the expensive OTG thingy. The hard part is getting the jack..

arikyeo said:
The connector is NOT proprieatry, its a 30 pin PDMI connector. Read it at everyone's favourite encyclopaedia: http://en.wikipedia.org/wiki/PDMI
So basically you can just solder pins 1,2,3,5 to your thumbdrive and pin 4 to pin 2, and optionally solder pin 15 to pin 6 for high power and you're set. Saves money on getting the expensive OTG thingy. The hard part is getting the jack..
Click to expand...
Click to collapse
Have you verified the pin outs? Since the cables from original Tab can be used and it did not have a PDMI port I would guess that the Plus is not a PDMI port.
http://en.wikipedia.org/wiki/Samsung_Galaxy_Tab
It also has a 30-pin docking and charging connector very similar to the standard PDMI connector (a non-proprietary alternative to Apple's docking connector). It appears so similar to the PDMI connector that it is widely mistaken for it, but it is non-standard and all accessories, including charging cables, are incompatible with other equipment and only available from Samsung.​
http://forum.pocketables.net/showthread.php?t=7722&page=2
http://fatmixx.com/2010/12/07/samsungs-galaxy-tab-has-a-familiar-looking-connector/
http://www.kineteka.com/galaxy-tab-connector.aspx
I attached pictures of the pinouts.
I was really disappointed with this when I found out about it yesterday.

Indeed nothing universal about Samsung...they even use a trigger to activate charging, effectively making all third party non.Samsung specific chargers and battery packs out there useless without an adapter

[Q] Powering a TF-101 with a dead battery

I did something drastic today. I ripped apart the old TF-101 keyboard (already broken prior) to get at the battery pack inside, opened my son's Transformer, and swapped out the dead battery inside with the one from the keyboard, only to find out that... the other pack is just as dead as the one already inside the Transformer.
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I get the same red battery icon when I try to turn on the Transformer I just reassembled using the other battery. Now, I could in theory remove the battery from the second Transformer I have in order to do this, but opening up one of these things and extracting the battery is a non-trivial task to say the least, and I don't relish doing it again. A new battery is rather expensive, at around $40 + delivery, and to be frank I'd rather just spend that $40 as part of the cost of a new tablet. However, it turns out that there are some files inside that thing that I want to be able to recover (mostly photos and videos), so I'd ask what options I have for attempting to power up that thing one last time to extract the data from it. One way would be to use the working Transformer's battery, but that is obviously quite out of the question. I could put the thing on a lab bench somewhere (just assume that I have the facilities to be able to do this) and feed it with 7.4 Vdc along the same 8-pin header that the battery uses, to fool the tablet into thinking it had a working battery, allowing it to boot. What do the wires do, and what voltage levels should they have in order to make the tablet think it has a good battery?

There is a USB mod on the forums here somewhere to feed 1 USB port on your machine 12v instead of 5v using a 12v molex feed from the PSU, which allows charging from a USB port, which would also allow data access from the same port
I`ll post a link if I find it
EDIT - Could be here somewhere
http://forum.xda-developers.com/showthread.php?t=1087321

Why do people like wireless charging?

I don't know if I'm the first one to say this, but I find wireless charging completely useless... I had an old '90s Motorola with a charging stand... I find that INFINITELY more useful than "Wireless charging".
First of all, the charger still has wires, so you're still stuck on a wall... Unless it has a battery attached to it, which is nice, though most scenarios where you use an on-the-go charger you are "on the go" and moving, so a normal external battery could do... (see third point)
Second. your phone is still during that time... You can't do anything to it... Why? Just so you don't need to put a wire in the port, to save some (1 second) time (?)
Third, it has ZERO stability. That's why I say that charger from 20 YEARS AGO was a lot better. You put your phone in and it charged. Same as Wireless charging, except that old Motorola didn't fall off and stop charging the second someone bumped into the table just a little bit. Or you are in a car...
I find wireless charging just good marketing taking charging a step back...
Also, the USB pins that keep the wire in my phone got crushed, so my phone right now can't be lifted while charging... PEOPLE ACTUALLY PAY FOR THIS???
PS: I found a "useful" use in cafes
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All you need to do is plug in the phone and "wirelessly" charge....

I can't see the appeal, either. I use my phone a lot whilst it's attached to the charging cable. You can't do that when you use a wireless charger.
My charging cable is 2 meters long. I can sit on the sofa and use my phone as an ereader or TV screen whilst it's charging. If I were to use a charging pad, I'd have to leave it on the table, which is not very convenient.
For me wireless charging is just a useless gimmick.

I find the potential of it interesting, rather than the current state that it's in.
It just seems a billion times more durable than the damn micro-usb port on EVERY Android device.
Maybe wireless charging is the solution, or maybe it's usb type-c.... we'll see i guess :]

Yeah I don't see the appeal either. Maybe it's good for coffee shops or restaurants where you don't use your phone anyways and it's lying on the table, so might as well get charged.

I think I want a usb Female to Felame - but not sure.

Hi all,
got a bit of an odd one for you all to ponder over. I recently purchased a magnetic charging cable. One of these
http://www.ebay.co.uk/itm/201496892947?_trksid=p2057872.m2749.l2649&ssPageName=STRK:MEBIDX:IT
It has a very small adapter that plugs in and lives in the micro usb slot on my note 3. The cable end then attaches magnetically and away we go - charge and data - pull and it drops off. Pure magic.
The pondererance is how do I connect OTG devices? This adapter is a snug fit and designed to stay put. For socket damage I would also prefer it stay that way. The lead goes to a normal USB male. So to connect I think I need a usb Female to Female - such a thing does exist here
http://www.ebay.co.uk/itm/2-x-USB-2...515514?hash=item20cfdff93a:g:~9kAAOxy4t1Sf0rr
but I am unsure what is wired to what - and indeed what should be wired to what... So
1) is this the right thing - plug the magnetic lead into it then plug a USB pen in to the other end and away we go?
2) if not how should a female to female be wired? I have plenty of usb extension leads and am willing to cut a pair of them to make the appropriate adapter?
3) if there are no definitive answers how safe do you think it will be to try? I am thinking get the one from e-bay and then plug in a usb pen. Best case it just works, bad is the power is wrong and it kills the pen (upsetting but I can live with it). Worst case it blows up the phone. What chances do people think for just working or damaging stuff?
Open to any and all thoughts and suggestions...
Keverso

Personally, I would give it a try - learning by doing. But I think the chances are not quite high that it will actually work.
Here is a scheme of the difference between OTG and regular USB.
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Sounds good. Looking forward to it.

alphatact1cs said:
Personally, I would give it a try - learning by doing. But I think the chances are not quite high that it will actually work.
Here is a scheme of the difference between OTG and regular USB.
Click to expand...
Click to collapse
So - if I am reading this correct I take two extension leads - cut the female ends and join each colour to the same on the other lead (assuming both leads have the same colour code) and that should (with a little luck) work? That sounds easy enough. I am obviously worried about killing something but I have got an old galaxy 1 phone kicking about somewhere as well as a usb pen I would not be too upset to lose. I may well give it a shot this weekend and see what happens... I will report back if I do.
Thanks for the help.
Keverso

Looking for a USB-C Hub with Power Delivery

I'm looking for a USB-C Hub with Power Delivery, any good suggestion?
I saw Choetech's official Facebook were given out big discount codes of its USB-C multiport adaptor, so I sent a PM to request a code. Anybody used this one?
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Did you find a suitable hub?

Hi everyone,
I'm also trying to find a hub with different connector like HDMI / USB-A 3.0 / Ethernet... but it's very difficult to know if they are compatible with the Pixel C.
Most of them are compatible with Macbook but to few information about compatibility with Android.
Does anybody make a list of compatible hubs for pixel C ?

https://www.amazon.it/gp/product/B01CJMQZF0/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1
I have this one. Of course look on it on amazon.com
It has ethernet,3hubs that i use with usb stick(fat32) to move my docs and has powerdelivery to charge while u work. HDMI is not supported with usb c yet.

A list I don't have but for a little over $11, I bought me this 3-Port USB 3.0 LAN RJ45 Hub (eBay Item # 162126608654) in combination with a USB 3.0 Female to USB C (Item # 152382378772)
, and my G-Pixel C is a happy camper so far

Also, a friend of mine has this one with power throughput to host, works great on my Pixel C too

techdog88 said:
I'm looking for a USB-C Hub with Power Delivery, any good suggestion?
I saw Choetech's official Facebook were given out big discount codes of its USB-C multiport adaptor, so I sent a PM to request a code. Anybody used this one?
Click to expand...
Click to collapse
I have one, it works. The HDMI doesn't work yet: but it's a Pixel C problem: see here

These claim Power Delivery.
https://www.amazon.com/Multi-port-AVOTCH-Delivery-Charging-Ethernet/dp/B01N6JBS04
https://www.amazon.com/dp/B01B8V6JC2
https://www.amazon.com/dp/B01LY23GUZ
https://www.amazon.com/dp/B01FPTI0IY

Does anyone know of a hub that doesn't briefly disconnect USB devices (mouse, keyboard, Ethernet dongle, hard drive, ETC) if the charger is unplugged?
I have some cheap hubs and they work but if I unplug the charger then everything disconnects for a moment until the tablet can reconnect with its own power. This is not great for thumb drives!

As far as I know, all USB type-C hubs are like this. In fact, I think It's the intended behaviour. Switching from charger to device for power necessitates a brief interruption.