Dual ended USB/Samsung flashdrive prototype - Samsung Galaxy Tab Plus

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

Related

Forcing USB audio ouput - possible?

Is it possible? I bought this mini USB to 3.5mm adapter and the description said it was suitable for the S710. Actually, it isn't. So I'd like to know wheter it's possible to force the phone to use the USB-output instead of the speaker.
The phone doesn't detect the headset.
Thanks in advance. I tried to find it on the internet, but that didn't work out. My excuse if I missed something.
I am not actually expert with that but I think, one of audio part's pin is not connected properly, or some part of electronics is missing. I am suspecting pin 9 marked as S - look at ExtUSB pinout).
I was just about to buy one of those adapters, but now I'm hesitant. Is this a common problem with the s710?
torrentonly said:
I am not actually expert with that but I think, one of audio part's pin is not connected properly, or some part of electronics is missing. I am suspecting pin 9 marked as S - look at ExtUSB pinout).
Click to expand...
Click to collapse
Indeed. I also purchased this one today. It seems to have a slightly bigger connector. It's only 2 dollars so the price isn't an issue, but I just want to have it work.
The description should say extUSB to Audio (if it's not extUSB it might not work).
Look if the pins of your phone are dirty or something.
And no, with an extUSB to audio converter this doesn't happen (so not a common problem)!
frauhottelmann said:
The description should say extUSB to Audio (if it's not extUSB it might not work).
Look if the pins of your phone are dirty or something.
And no, with an extUSB to audio converter this doesn't happen (so not a common problem)!
Click to expand...
Click to collapse
I don't know, I only got the cable without any description.
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This was the one. The default headset works fine.
Look at the USB part if you have 6 little pins in it. If you don't, you haven't ExtUSB converter.
Hi 3lmo,
...the one in your post looks like a normal USB connector. There the 5 pins of the USB are used to transport also the Audio (i.e. audio and USB/charge are not possible at the same time). This is used for some devices like Motorola Razor V3 or differently for BenQ E72.
The ExtUSB from HTC has added to the 5 pins of the USB another 6 on the other side of the plug insert. The original 5 pins are used only for USB purposes - not for Audio which uses the other 6 pins. There is info in the net about the details somewhere. Just take care that you get the extUSB type. The second one you got should work (I have the same from the same vendor).
See also this post: http://forum.xda-developers.com/showpost.php?p=3473046&postcount=12
bye
tobbbie

Charging + analog audio over USB

I'm interested in getting a car dock, but so far all of the docks I've seen only connect to microusb to allow you to charge your phone. If you want to get audio out, you have to connect a cable to the 3.5mm jack. Has anyone seen a cable or adapter that allows you to both charge from a USB charger and has analog audio out so I can connect to my stereo? I am aware that microusb does not provide analog audio out, however the android accessory development kit does seem to support audio over usb, so the cable would need to have some DAC built in. However I can't seem to find any. The only option I've been able to figure out would be to buy a USB DAC intended for a PC, connect it via a USB OTG cable, and splice in my charger. But this seems cumbersome and expensive.
Thoughts?
This is something I am interested in as well, however, I really don't think there's any way a dumb adapter could accomplish it without a DAC, like you said.
Probably the smallest option would be something like this, but still expensive; and since it'd be OTG, probably a pain.
My current attempt is to DIY a POGO dock (using the contacts on the back of the phone) out of one of these.
According to some work these guys did the contacts can function for charging and audio out.
I'll let you know if anything ends up working.
Well, I got all my parts in... and ended in failure
(I forgot to take pictures during, but here are some after the fact...)
I started with a Kidigi car dock:
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It holds the phone fairly securely:
But there are three problems:
It looks to have been built for the international version, since the usb plug is about a millimeter out of place. This isn't a problem... unless you're trying to line up tiny pogo contacts.
If you remove the usb plug, the phone falls out of the dock, damn!
The usb plug is modified so it triggers car mode when plugged in.
Anyway, I decided to forge ahead.
I was able to determine where the pogos go by lubing up the back of the phone and pressing it into the dock with some duct seal in between.
The construction of the dock was extremely convenient for this project; it was made of three pieces.
Two pieces are screwed together, and one clips in depending on whether or not you have a case on your phone.
I drilled the clip in piece to just allow the end of the pogo through, but not the whole thing.
Then I drilled the other two a bit bigger to fit the whole pogo:
I put the pogos through:
And epoxied them in on the inside of the two screw-together pieces:
All the connections worked!
I temporarily tacked on some wires to the pogos and was able to charge the phone.
However, even after playing with a ton of different resistances, I wasn't able to convince the dock to output audio from the other contacts.
I didn't know if it was because I was on a sense 5 rom, so I tried cleanrom 6.5 (basically stock), and JB aokp... no luck.
Long story short, I'm just going to use the dock as it was intended and deal with having two wires coming out of the phone
I try this one - http://www.ebay.com/itm/Black-3-5mm...Phone_PDA_Cables_Adapters&hash=item25825f2273
but no audio out on the 3.5mm jack

[Q] which forum for usb hub hardware-mod help? (otg+charging)

Which sub-forum can I ask a question about modifying this hub for OTG+charging ?
http://www.ebay.com/itm/Portable-Ho...-Cable-For-Samsung-Galaxy-S3-S4-/371129011472
I discovered after opening, that it only sends back 1.5 volts to the host, so it sends the 5v to the usb devices only.
Can I simply patch the red positive from the voltage input back the the red positive on the host? I assume they all share the same ground so that would not be necessary, unless the ground itself is being used to limit the voltage somehow.
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Okay studying the back, it appears maybe I can just "jump" the positive from the 5+ input directly to the host 5+ since the ground is already shared.
The million dollar question is, what is that little part it is bypassing, capacitor, resistor, transistor?
And is it safe to apply 5v output to the 1.5v it is producing. I am assuming it is just a resistor knocking down the 5v to 1.5v ? What happens if you put 5v on both sides of the resistor?
for google to help find this later, is is a HUB-154A which is popular on ebay on amazon
Modifying HUB 154A to OTG+Charging
Hello,
I look about this because I bought the same for modify it to add charging feature.
The component seems to be a Jfet. The pin connected to the Led is also connected to Gnd.
I connected the hub to an Android device and tested wiring +5V from micro USB connector to +5V from external connected power source.
Nothing destroyed , but charging the Android device does'nt work .
I disconnected the external power supply from hub and the hub from Android device.
By reconnecting the hub to the device, Led will get on after about a half second. The time to know who makes what. So the device delivers +5V power supply to the hub and to the peripherals. In case of big energy-consuming by a peripheral, the external power supply is necessary.

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

[QUESTION] USB-C cable no ADB connection

I got the original USB-C to USB-C cable for my Kebap on my charger. On the PC with Windows 10 on a very new MSI motherboard I used some cheap USB-C to USB cable for everything regarding my smartphone. Now I felt that the old cheap USB-C cable was a bit too short and got a pretty good looking mesh covered USB-C to USB with 2 meters length. Now I realized that ADB does not work with it. Data transfer is fine on the PC, but ADB just turns on and off the connection all the time looping. I checked with the old cable on the same USB port on the PC, and it works fine. Checked the new cable on some other USB port, not working. For my Trezor hardware wallet the new cable works.
How comes that some cables work, and others don't? I thought as long as they are sold as "data cable" suitable for syncing stuff, all should work?
C to C cable is kind of mess, especially those with E-Mark chip, they can negotiate the communication protocol(USB3/4_GEN1/GEN2 Thunderbolt3/4_20Gbps/40Gbps…) and current with the system or charger.
So different type C to C cable will act different, cable it self can backward compatible, oneplus 8T USB prot is USB3.1 GEN1(USB2.0 compatible), any C to C cable should work fine(I use tunderbolt3 cable do all the stuff).
Oneplus 8T C to C cable connector only has 2 data pin(D+ D-), means is USB2.0 only cable.
In your case, there are two possible situations;
1> New cable is USB3.X or higher(use more pin/core), but the core is low quality or damaged, or the phone/cable connector is dirty or oxidized. try unplug/plug different side several times, or use another cable.
2> Some PCIE GEN 4.0 AMD motherboard/laptop has USB disconnect issues, try set PCIE to GEN3 may solve this problem.
Or, just use USB2.0 only cable, for maximum compatibility….
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Thanks for all the info.
Went to the hardware store, and got me some higher quality USB-A to USB-C cable (15$ - more than double the price of the cheap one), and ADB works mow. The eBay seller of the cheap cable with mesh just wrote me, that he will send me another piece. I will test that, and then I will know if it's just lame ass cable quality or some defect.
E-mark Cable info dump? You got a gadget to analyze smartphone cables? Nice.

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