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Converting a usb memory stick to MICRO usb format...

post #1 of 8
Thread Starter 
Hey everyone, so I am looking to get a microUSB stick to have music on had for my smartphone which has no minisd slot. I have been having trouble locating a microUSB format memory stick on ebay or anywhere else for that matter soit seems to not exist as of yet (the chinese will get on it soon I hope!)

In the meanwhile I want to avoid using an adapter + usb stick and I am wondering if it is possible to covert a normal usb stick to have a microusb male connector instead. How difficult is this to do, I am pretty savvy with a soldering iron and I will most likely use a catalizing epoxy to put hold the micro usb male connector in place of the old one, so I got the structure down.


So is this possible? I would like to know how straight forward wiring the new tip will be, is it a straight 5 pin to 5 pin connection? Is there a difference in power output etc etc any advice is greatly appreciated! Another idea is to use a MICROUSB male to USB female adapter and just somehow fuse them together permanently and making it smaller once I get the electronic bits apart.....

Here is a quick chop to help illustrate my idea... Obviously I dont think I could make it THIS clean but idealy I would like a small format 16gb even 32gb card with a microUSB male connector in place of the normal USB connector.....

post #2 of 8
First and foremost, your phone must support USB Host Mode, both in the hardware and kernel, to even recognize a thumb drive.

The pinout for different size USB plugs is the same. All you would need to do is hack up a micro USB cable or adapter and do whatever splicing in necessary.

Although I would think a 3" flexible micro USB dongle would be better than having a ridged thumbdrive sticking out the side of your phone.
 
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Wild eyes (2015)
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post #3 of 8
Thread Starter 
The phone is the Sony XPERIA U which has "USB on the GO". That basically allows the user to (with a usb adapter) plug any USB device to the phone from a keyboard, mouse, joystick to a memory card, card reader etc. So syncing with the phone is not a problem, I could just use a normal stick and an adaptor but I dont want to lug it around or even risk breaking the female inside the phone (because the leverage of it stickout out so far) soo my plan was to just pin to pin plus epoxy to hold it all together.
post #4 of 8
Right, that's what I was saying with the dongle: a flexble adapter (like an OTG cable) to connect your thumbdrive to the phone. I don't understand your plan, but unless you open your phone up and solder in a female USB A connector, you're going to have something sticking outside your phone one way or another.
 
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post #5 of 8
Thread Starter 
the phone already has a female micro USB



I dont mind something sticking out as long as it is small, one way or another even if I use an adapter there is going to be something jabbing out of the phone. Thats why using one of those tiny memory sticks is the plan since its only a few mm long.

But what you mentioned before about it being a straight splice, I just solder whatever goes to the usb into the same spots on the micro usb right? I could salvage an old memory stick and a mini usb charger to do a test run.
post #6 of 8
Haha, yes a female USB micro, but not a female USB A (full size version).

You would obviously want to double-check the pinouts online but they have the same number of wires that do the same thing. The may be arranged differently but every wire will just be a straight across splice.

I had to hack apart a printer USB cable once and splice a male micro USB end to it to charge my phone once. It was messy and time consuming, but it worked.
 
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Wild eyes (2015)
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post #7 of 8
Thread Starter 
Glad to know that it worked out for you splicing down to a micro usb, Im basically doing the same thing just with a memory stick. Im more concerned with being able to do it with such a small usb stick and keeping things clean. Im down for a challenge, get the magnify glass, fine soldering iron, and some 2 part epoxy or bondo and Ill go to town. Ill be sure to photograph it all when the time comes and share.

I actually found a few threads on another site answering a similar query regarding 4pin vs 5pin usbs, and how to get around it so it works with android phones and 'USB on the go'
Im hoping to end up with a 32 or 64gb memory stick that sits as close to the phone as possible something really small I wont have to worry about snapping inside/ no leverage.
post #8 of 8
Hey Tolstoy..

Did you ever get your project done?
I am wanting to do the same thing, and wondering how hard it was.
I really do not know why they don't make Micro USB thumb drives. Lots of people would buy them I think. smile.gif
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