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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..
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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

MicroUSB?

Has anyone seen an adapter to MicroUSB? The "kit" Asus sells looks to be full size USB and daisy chaining adapters isn't a great solution.

i believe the kit that's sold connects to the charging port of the device and gives you a full sized usb port.i'll find out tomorrow
edit: kit does work, although when i bought it, there was not mention that it would work.. but it does.

wolfman87 said:
Has anyone seen an adapter to MicroUSB? The "kit" Asus sells looks to be full size USB and daisy chaining adapters isn't a great solution.
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What is it you are trying to do. The connector on the tab is proprietary and the other ends is USB to connect or power. Why do you want micro usb on the other end?

I guess something like Computer USB -> MicroUSB + Adapter for proprietary **** -> Pad would be what OP wants. Makes sense because everyone has a load of MicroUSB cables lying around. I'd want one.

maedox said:
I guess something like Computer USB -> MicroUSB + Adapter for proprietary **** -> Pad would be what OP wants. Makes sense because everyone has a load of MicroUSB cables lying around. I'd want one.
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OH you want to turn a standard micro usb cable into an asus cable. Don't think you can

Let us know what you find out - I was wondering the same thing so I can use my old PS2 IBM clicky keyboard with my flashy pad.. :highfive:

The USB kit from Asus offers the same functionality as the USB port on the dock. Why would you connect a micro USB (B) connector to a host (A) connector? The kit/dock is meant for keyboards, mice, card readers etc. Not for charging.

archie_658 said:
The USB kit from Asus offers the same functionality as the USB port on the dock. Why would you connect a micro USB (B) connector to a host (A) connector? The kit/dock is meant for keyboards, mice, card readers etc. Not for charging.
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to plug in a keyboard...

Sorry, I didn't have access to a computer yesterday.
I have a few accessories that connect through microUSB (i.e. charger, external speakers, etc. ) that I'd like to connect up to it. All of them use a micro USB connection.
The kit looks like it has full size USB, so If I wanted to us my other stuff I would have to have: Accessory -> micro (f) to full (m) usb adapter -> Asus USB Kit -> Infinity.
That's the problem. I plan on getting the KB dock soon which will be great for the KB (thats the point right ) but when I'm not using the KB, I might want to use the other stuff.

Na na na...I mean a REAL keyboard
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Hahahaha! Nice. Loving the Old School IBM on it and the PS/2

Yo! I know y'all can appreciate the geekyness... my wife on the other hand...

[Q] USB OTG not working, is this adapter good?

Hi everyone, I bought this female to female USB adapter http://dx.com/p/usb-female-to-female-adapters-pair-106349 to convert my regular micro USB cable to USB OTG one. Togehter with a tested and working USB-Y cable I connect a flash drive and it only blinks for a second (glows all the time when plugged into computer), then goes out. I tried my charger and laptop as power sources. The phone doesn't show anything, no new stuff in /mnt. Also tried mouse, no good either. The smartphone is HTC Sensation with ARHD 6.8. The kernel should support USB OTG, and there is a video on youtube with working example. Can this adapter be the problem, should I buy a normal USB OTG cable?

dayer said:
Hi everyone, I bought this female to female USB adapter http://dx.com/p/usb-female-to-female-adapters-pair-106349 to convert my regular micro USB cable to USB OTG one. Togehter with a tested and working USB-Y cable I connect a flash drive and it only blinks for a second (glows all the time when plugged into computer), then goes out. I tried my charger and laptop as power sources. The phone doesn't show anything, no new stuff in /mnt. Also tried mouse, no good either. The smartphone is HTC Sensation with ARHD 6.8. The kernel should support USB OTG, and there is a video on youtube with working example. Can this adapter be the problem, should I buy a normal USB OTG cable?
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This female to female adapter doesn't convert USB cable into OTG. In USB OTG cable also two correct pins must be connected together.
Just buy USB OTG Cable with USB power.
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Using a USB Extension Cable with a USB Wall Adapter

Hey guys, I just purchased a new phone a few days ago and I was wondering if I could use my USB extension cord with my USB wall adapter since the USB cord that came with my phone is so short. I am unsure if using a USB Cable + USB Extension Cord + USB wall adapter is safe or not and if it will actually charge.

thebriando said:
Hey guys, I just purchased a new phone a few days ago and I was wondering if I could use my USB extension cord with my USB wall adapter since the USB cord that came with my phone is so short. I am unsure if using a USB Cable + USB Extension Cord + USB wall adapter is safe or not and if it will actually charge.
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if its only for charging from USB via PC, it should not be a problem, but if it also used for data, you need to test if it is wired for it also. IF all works than its not a problem too.
Check this out! Links to useful Guides and " Banned " Documentaries ​

xsenman said:
if its only for charging from USB via PC, it should not be a problem, but if it also used for data, you need to test if it is wired for it also. IF all works than its not a problem too.
Check this out! Links to useful Guides and " Banned " Documentaries ​
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It's not charging from USB via PC, it's charging from the USB wall adapter that's also connected to a USB extension cord that also connects to my phone.

thebriando said:
It's not charging from USB via PC, it's charging from the USB wall adapter that's also connected to a USB extension cord that also connects to my phone.
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well basically if you have cable with a USB connector on each end, you can try testing it on your PC and Phone to see if it is compatible for data transmission as the pin out for data is different from charging
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xsenman said:
well basically if you have cable with a USB connector on each end, you can try testing it on your PC and Phone to see if it is compatible for data transmission as the pin out for data is different from charging
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My phone doesn't use micro usb. I have an iPhone, it uses lightning.

thebriando said:
My phone doesn't use micro usb. I have an iPhone, it uses lightning.
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well, you are on the wrong forum, you need to post in XDA iphone forum, use google to locate it.
Check this out! Links to useful Guides and " Banned " Documentaries ​

[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.