yashsingh1/xdaforums huggingface dataset:
[Nexus 7 Accessories] smb_gaiden:
Well, I had a good thing for about as long as Higgs-boson existed.

Quest: To make a very small USB OTG MicroSDXC card reader

Ingredients:

1. USB to Micro USB cable

2. Small USB microSDXC reader

Goal was to marry the microUSB plug with the USB microSDXC reader. The enclosure was the rubberized USB plug cover itself after some cutting.

Steps:

1. Disassemble the microSDXC reader.

2. Cut 60-70% of the PCB where the USB pins are, leave enough room to solder onto.

3. Cut off the microUSB end of the cable

4. Cut off the USB end of the cable

5. For each cable end, use a blade on the side to free out the USB plugs; rememder to keep the rubberized part in good shape for re-use

6. Cut some of the cable to get nice Red, Black, Green and White wires. Repeat once again, but shorter to get another black wire.

7. Melt boths ends of each of these 4 wires to show metal (red one was a pain to melt)

8. Tin the wires ends

9. Tine the USB pads

10. Desolder existing wires off of the microUSB plug and annotate the order (test the empty one to ensure it is cable select)

11. Solder wires to USB pads in the proper order with proper colors

12. Remove USB shielding wire from microUSB plug.

13. Solder the short black wire to cable select and ground.

14. Solver each colored wire to the proper spot which you previously annotated on the microUSB plug.

15. Re-assemble the card reader part except USB plug

16. Test. Win!

17. Cut away rubberized USB plug holder to fit this contraption

18. Place contraption inside. Test. Win!

19. Super glue the edge to close it and result as shown in the photo.

20. Test. Win!

21. Wait five minutes. Lose!

I guess somehow something shorted between the last test and the next which resulted in failure. Re-opened and checked with multimeter, nothing saying shorting, so must have shorted in the enclosure and fried something. Not functional outside the enclosure any longer. Weak link for reliability was keeping the microSD card aligned and in contact with the pins. Going to think this over a little longer and re-order a few more of the same microSDXC readers.
[Nexus 7 Accessories] EFFENGEE:
found it

i think i found it: http://dx.com/p/s-mcr517-multifunct...paign=Cables&gclid=CP-DwoLbubYCFQexnQodXAwAhQ
[Nexus 7 Accessories] NicoGa:
AN UPDATE WITH RECENT STUFF :)

Here is a nice project on kickstarter :):):)

http://www.kickstarter.com/projects...er-for-android-smartphones-and-ta?ref=popular

(I guess it is what I was searching from the beginning ... in the end I did one very similar myself!)

Recently I also found this which look interesting:

http://www.aliexpress.com/item/2013...B-Charging-Cable-Free-Shipping/807167659.html

Thanks to everybody who participated to this thread :)
[Nexus 7 Accessories] scorneil:
thanks for the kickstarter link, backed it
[Nexus 7 Accessories] ginfest:
Perfect, backed it for $12
[Nexus 7 Accessories] cr1cr1:
dx.com/p/c310-otg-tf-card-reader-w-usb-to-micro-usb-adapter-for-samsung-i9100-i9300-i9220-n7100-174106

Kawau C310: amazon.co.uk/gp/offer-listing/B00DEOO078/ref=dp_olp_new_mbc?ie=UTF8&condition=new

It is amazing that no one thought of this so far... though the market is filled with tousands aof useless and colorful readers
[Nexus 7 Accessories] Leoisright:
Yeah, I've been using this for months now. Works amazingly good. Little bulky but can use headphones at same time. So its not too big
[Nexus 7 Accessories] ThomasBags:
Now all they need is something like that which also features a passive charging port. Great if you were watching a movie from it on a tablet, where you may need to charge. Luckily, nexus tablets have the pogo connector.
[Nexus 7 Accessories] NicoGa:
Well yes, but to be able to charge and use USB otg at the same time you need a special version of the kernel:

http://mehrvarz.github.io/usb-host-mode-power-management-nexus7/

Envoyé depuis mon Nexus 7 en utilisant Tapatalk 4 Beta
[Nexus 7 Accessories] bsoplinger:
And you won't be able to use the POGO pins. OTG mode disables them which makes sense if you realize that the Nexus provides power for the USB device when in OTG mode. There'd be power trying to come in via POGO at the same time as power going out. But you can use a special power providing OTG cable along with the kernel mentioned above to keep the tablet charged while using an external reader. Info about the cable should be at the same site.

Sent from my Nexus 7 using Xparent Purple Tapatalk 2
[Nexus 7 Accessories] ThomasBags:
That does not seem to be the case. I currently have my usb drive hooked in through otg, and charging though the pogo connector. The device reads as charging and power is going up, and the drive is fully accessible.

Ah, well that's a shame. I have a Nexus 10, though.
[Nexus 7 Accessories] bsoplinger:
The POGO connection for the Nexus 7 is different, 4 vs 6 pins. The 2 power pins are connected to the same power as the USB connection hence the need to be off as in disabled when the Nexus 7 is in OTG mode. I believe that with the Nexus 10 the additional pins means that the connection is at the USB port side of things which is why it will work for that device.

My Nexus 7 shows charging if I dock it while I have an OTG connection but when I look at the battery amperage it only goes down, never up. I'd guess that the code for dealing with the dock isn't very smart and just changes to a charging icon if there's power on the POGO pins regardless of the fact that the OTG code disables them. Or perhaps I should say that the OTG code isn't smart and doesn't change the battery icon to always show discharging.

Sent from my Nexus 7 using Xparent Purple Tapatalk 2
[Nexus 7 Accessories] K1LLER HORNET:
Exactly what I was thinking.

I hope someone will manufacture them :)
[Nexus 7 Accessories] Mi|enko:
Yeah. I thought for sure that Samsung would do something like that for the Galaxy Tab 10.1 (I only have a 16GB 3G model), but sadly it's never happened. Hopefully, Google or Asus come up with something.
[Nexus 7 Accessories] K1LLER HORNET:
I expect it'll pop up on eBay first.

Seller location: Hong Kong ;)
[Nexus 7 Accessories] NickFritz:
This thing seems to be an all in one

NOOSY smartphone U-disk

http://www.noosyapple.com/cp/html/?69.html

or

http://www.alibaba.com/product-gs/527541347/4GB_10MB_S_transfer_rates_USB.html?s=p

http://www.ebay.com.au/itm/Micro-US...cessories_Cables_Adapters&hash=item2570b1850e
[Nexus 7 Accessories] Mischaseb:
Do we think this will work with any device supporting OTG? http://www.mobilefun.co.uk/mobile-fun-connection-kit-for-samsung-galaxy-s3-p35462.htm
[Nexus 7 Accessories] maartenjanvdwielen:
Did I miss something?

All I can find is something like: No mounting Storage is natively supported

http://www.anandtech.com/Show/Index...he-nexus-7-mounting-usb-storage-not-supported
[Nexus 7 Accessories] Ovrclck:
So this combo will work for sure using stickmount?
[Nexus 7 Accessories] NicoGa:
Not for OTG (from my understanding?!) ... as connections slightly differs i.e.

http://xdaforums.com/showthread.php?t=1092493

You need something like that:

http://www.amazon.com/Micro-USB-OTG...id=1342410144&sr=1-7&keywords=micro-b+usb+otg
[Nexus 7 Accessories] darkamikaze:
so the item doesn't have to say "USB OTG" for it to work?
[Nexus 7 Accessories] Ovrclck:
Oh okay. Thanks man
[Nexus 7 Accessories] sareen:
i bought the official Samsung galaxy s3 usb otg already surely that would work and i can stick my 32GB usb into it
[Nexus 7 Accessories] JaSauders:
I understand it something like this:

USB OTG keyboard/mice work out of the box

USB OTG storage does not work out of the box

USB OTG storage capability (software wise) is baked into the kernel, so support technically exists

USB OTG storage is lacking the ability to mount a storage device, which is the reason the entire storage idea natively does not work

With utilizing StickMount (free in app store), you can work around this issue, as StickMount will mount the storage device for you

StickMount requires your device to be rooted

Overall: Rooted N7 + StickMount = USB OTG storage functionality

Profit

It's thought that Google left the mount feature out as a slight push to people to be a little more reliant on cloud services. Of course the mass user base understands the cloud service is not a 100% solution, but moreso just a storage supplement in areas that are conveniently wifi equipped. That said, Google has all of the other support needed, which they likely intended to do so people who tinker (root users, etc) would still have full blown functionality once they root the device. The above is all speculation, but a pretty good assumption at that.
[Nexus 7 Accessories] Latro666:
Been looking for this myself, found this:

www dot mobilefun dot co dot uk

/mobile-fun-connection-kit-for-samsung-galaxy-s3-p35462.htm

Can't 100% make out if its micro usb or not, in a rush to get to work...
[Nexus 7 Accessories] micks_address:
i have a 32gb micro sd card lying around that would be great if i could use with my nexus 7 or galaxy nexus..

---------- Post added at 09:11 AM ---------- Previous post was at 09:08 AM ----------

actually that looks pretty cool, i assume its micro usb if it can connect to the S3?
[Nexus 7 Accessories] Latro666:
yea, just watch the video of the guy using it, looks pretty sweet and just the ticket for a bit of extra storage options. Its a nice size to as it'll be even small if connected to an N7.

Not gonna jump the gun and say its the solution we'v all been looking for, have posted a comment on the product asking them if they think it'll work as of course if it does, they'll be selling lots of them if the N7 takes off.

will see what they say. Might take a punt on it if we get no reply, my mate has a s3 so i could just farm it off to him if it does not work. :good:
[Nexus 7 Accessories] Coatezy:
I know it's not an sd card reader but just ordered this Otg cable from play. Looks pretty solid. I like the look of the Samsung device above! Looks spot on if you want to use it for SD cards etc.. Was a bit concerned that it could cause damage to the micro USB port if knocked though. :( http://www.play.com/Mobiles/Mobile/...urce=0&searchtype=allproducts&urlrefer=search
[Nexus 7 Accessories] clockcycle:
size does matter...

I've have these;

http://dx.com/p/micro-usb-on-the-go-host-otg-adapter-pair-50774?item=1

http://dx.com/p/world-s-smallest-microsd-transflash-usb-2-0-mini-card-reader-11294

Buying these to replace my current set of mini sdcard readers, as the above ones tend to short out;

http://dx.com/p/high-speed-usb-2-0-micro-sd-tf-card-reader-orange-133155

http://dx.com/p/mini-usb-micro-sd-tf-card-reader-w-cell-phone-strap-max-64gb-random-color-125517
[Nexus 7 Accessories] evilssj4:
I was thinking of getting the OTG with the cord, but now that I see there is ones without a chord and that small, damn its probably way better! also, I still have my thunderbolt with the sdcard it came with 32GB, if i get the sd card reader the last one you posted then it should work fine to put videos, movies, ect and play them directly from the sd card right? like not stuttering or slow?

edit: Idk if a flash drive would be better
[Nexus 7 Accessories] BPSomerset:
I have been given the following:

stanleysonline.co.uk

product-2623

It is a Maxell Multi purpose usb kit.

not allowed to post url

Can someone give me advice if any of them would be of any use to attach a card reader, if I root my yet to be received Nexus.

I am very ignorant about electronics, but learning every day.:o
[Nexus 7 Accessories] smugle:
this is the product I belive you are looking for http://www.amazon.com/gp/product/B002EOCXTQ/ref=oh_details_o00_s00_i00

there is some that ship from California for 1.99 or so :good:
[Nexus 7 Accessories] vincepg13:
I'm going with the GS3 toolkit one if it's confirmed to work, looks like the perfect solution
[Nexus 7 Accessories] clockcycle:
This is what I ended up using...

Just got my order in from DealExtreme.

SOURCE; http://dx.com/p/micro-usb-on-the-go-host-otg-adapter-pair-50774?item=1

Paired with; http://dx.com/p/mini-usb-micro-sd-tf-card-reader-w-cell-phone-strap-max-64gb-random-color-125517

They sent me a white and black, the white you can see the blue data access led, the black you can't, it lights up internally but won't shine thru. Works great.
[Nexus 7 Accessories] JohnnyHempseed:
I get why you guys want to go as small as possible, but the fact is that you're still going to have a decent sized adapter sticking out the side of your Nexus. Just get the regular OTG cable with a 90 degree bend and use the magnet in the smart cover to attach the usb drive behind it. It's as low profile as you're going to get. I attached pics of my setup. :good:
[Nexus 7 Accessories] Ovrclck:
Can you link me to your micro usb reader? I have that same case btw :good:
[Nexus 7 Accessories] JohnnyHempseed:
It's not a reader, it's just a 32gb PNY micro usb drive... I got it on sale for $18 at my local Wal-mart and it has a metal casing which works perfectly with the case magnet.USB flash drives are faster than SD readers on USB 2.0.

I can't post links because I haven't reached 10 posts yet, but you can get the USB drive on Amazon for $20 - PNY Metal USB (P-FDU32G/APPMT-GE) and the 90 degree bend OTG Cable is like .65 cents on Amazon
[Nexus 7 Accessories] Ovrclck:
Oh right on! Thanks man!
[Nexus 7 Accessories] Nexus Theory II:
OTG-USB

This is my setup. I picked up the OTG-USB Cable on eBay for $3.50. Grabbed a USB 3.0 Flash Drive & Installed Stickmount on my Nexus 7. Works perfectly. I mostly use it to hold & watch Movis(.AVI files).
[Nexus 7 Accessories] lionsh:
Does anyone of you store apps\app storage on their setup usb connected?

I have a 8GB version and games like NOVA3 (btw, only 0.99$ today) take 2GB of space.

How can you run them from connected USB? I read about LINK2SD but it's not that grreat.

Perhaps symlink'ing...

anyway, i'll be happy to hear your thoughts.
[Nexus 7 Accessories] mariolouis:
You can't unfortunately. Unless you decompile the game apk and edit some links it has to point to the directory of your usb drive, usually /sdcard/usb storage, but that would be like looking for a needle in a haystack. Plus you will need to re-sign the apk when recompiling. After of course you have secured a copy of the game developer's source code, which you won't get simply by begging. :(

You can edit voldfstab and run the tablet thinking the usb otg as /sdcard, but having that dangling thing all the time even when not using it seem a lot of hassle.
[Nexus 7 Accessories] nkhoa23:
Can you links me where to buy your smart cover? Thanks
[Nexus 7 Accessories] patarock2:
Hi guys anybody has seen this before:

"mobilemate.yetaa.com/htc/goki-beaner-tf-card-reader-and-usb-charger-with-micro-usb-port.html"

It seems quite insterestion solution for our problem of storage.

Opinions?¿
[Nexus 7 Accessories] lionsh:
Good news everyone :)

I found this old thread on XDA http://xdaforums.com/showthread.php?t=1410262

basically instead of using symbolic links we can use mount.

The app in the link does this very nicely and i now run NOVA3 which has 2GB of data out of my usb connected card reader.

This will save a lot of space, especially for games.
[Nexus 7 Accessories] mariolouis:
I have read that thread and the app developer is gone before the app actually became stable enough for daily use. Maybe he realized his app gave too much problem he himself could not handle based on the discussions in his last posts. I don't know.

Because sometimes whole partitions and directories can be lost using that app, don't forget to backup. :)
[Nexus 7 Accessories] 1964ad:
Working Prototype

Here's some images of my first attempt at making a MicroSD to MicroUSB OTG adaptor. It works 100%

So come on all we need now is someone to reduce the size and manufacture them !
[Nexus 7 Accessories] rezwanhaq:
how about this ???
[Nexus 7 Accessories] aalupatti:
Pretty close.

Galaxy Note @ mobile
[Nexus 7 Accessories] dederp:
That concept looks good. I hope it gets made :good:

Anybody know if the attached pic is possible to build?

Apologies for the ghetto MS Paint concept but this is really what I'm looking for. Super low profile, Mini USB to Micro SD direct.
[Nexus 7 Accessories] JeepFreak:
You don't have any issues with the magnet in constant contact with the flash drive? Are flash drives not "magnetic media"

Billy
[Nexus 7 Accessories] mariolouis:
It should use nand so it is non-magnetic. Same tech as ram and flash drives. ;)
[Nexus 7 Accessories] Maturola:
I am working on something like that, I am having some issues sourcing the interface chip, the current company I am dealing with is asking too much due to the low quantities but i got some others on waiting list, I am getting a full BOM, and quotes for the plastics and PCB and i will publish a kickstarter.com project to get the first 200 units funded.

If anyone is really interested on getting one, you can PM me so I can get a general head count, I will post back when i get the 3d modeling of the casing.

Just for the records, I am a EE and I design electronic for a living so this is not a joke post.
[Nexus 7 Accessories] Maturola:
Quick update

Just wanted to update the thread with some current info.

So I was able to find a supplier for the interface chip with a price that make sense, so far this is what I got:

BOM cost is about $9.50

PCB Fabrication $5.75

This based on a 100- units

I am waiting on the quote for the Prototype SLA and 3D modeling of the casing and a production quote of actual molding and injection plastics.

:good:
[Nexus 7 Accessories] narlynarwhal:
Where did you get the part the MicroSD card actually goes into?
[Nexus 7 Accessories] mrpandainc:
Any updates on the kickstart project to fund the project? I am down for the cause.
[Nexus 7 Accessories] tumo135:
me too
[Nexus 7 Accessories] Maturola:
Thanks...Coming soon!

Kickstarter actually changed the rules for hardware projects not long ago, now you cannot post your project with 3D CAD files and modeling only, you need a fully working prototype and casing.

So I am just waiting to have those in hand and tested so I can publish the project.

I'll keep updating the thread as development move ahead.

Twitter updates at: @MicroSD2MicroUS
[Nexus 7 Accessories] hanhui52:
Waiting for actual product

Great work Maturola!

Here is my version of modification. Working perfectly with the smallest form that I could make it with my bare hands.

size= 32mm(L) x 13mm(W) x 6mm(H)

Too bad cant upload in the post because of new registration.
[Nexus 7 Accessories] jebise101:
Just picked up the 16GB today could not wait any longer so yes please get this project under ways I will be a backer.
[Nexus 7 Accessories] matique:
I am down for the cause too. Hopefully it doesn't stick out too much! Currently using a 90 degree usb otg cable with my 64gb sdxc SanDisk thumb drive... A bit too big heh.

Nexus 7 | Paranoid Android | Franco Kernel

HTC Sensation | Bruce's CMX | Bruce's Kernel.
[Nexus 7 Accessories] hello_world.c:
I am in. Was wondering why it doesn't exist yet since it would make sense for a whole bunch of other devices too, with non-expandable memories.
[Nexus 7 Accessories] Maturola:
Thats not bad at all, the Prototype I got on order is 1.18'' (30mm) x 0.6'' (16mm) x 0.24''(6mm)

The final design is targeted to be smaller than that (aprox. 0.8'' x 0.5'')
[Nexus 7 Accessories] Maturola:
Prototype time!!! - MicroSD to MicroUSB adapter

Got the Proto unit last night, had a chance to do some test. Work as designed on my GSIII and Nexus 7

Size is a bit larger (by about 1/4 of a inche longer), due to some development parts & test points that will not be required for final assembly. it is a 1.25'' x 0.7 right now, I should be able to get it under a inch long (plugged) and about just the width of the MicroSD card socket which is right about 1/2 inch
[Nexus 7 Accessories] Urich24:
That's so freaking awesome dude hope to get one soon as I only have the 16gb model!!!
[Nexus 7 Accessories] ericdjobs:
Whoever makes this...

http://www.amazon.com/elago-Mobile-...69247&sr=1-3&keywords=MicroUSB+SD+Card+reader

Needs to seriously consider a version with MIcro... I mean, look at the size of that thing!

You'd barely notice it!
[Nexus 7 Accessories] Maturola:
That is just not possible, the way they did that is making a custom USB conector with the build in MicroSD socket in top, the MicroUSB plug doesn't have enough area to do that, secondly microUSB connector was design to be Cable mounted and not Board mount, only 2 manufacture currently made a PCB mount MicroUSB plug and they only got 1 model each.

Smalles you can make it, is the surface area of the MicroSD socket Plus the pedestal of the Micro USB (Which is there for mechanical support), which is exactly what I am working towards.

*You could make it even smaller if you only socket the Microsd Contacts, but once you get the MicroSD card in there it will add to the overall length, which IMO is pointless.
[Nexus 7 Accessories] ericdjobs:
Ahh! I see. Always great to have someone knowledgeable chime in :)

I love the functionality of USB OTB, but it just looks so bulky sometimes, haha.
[Nexus 7 Accessories] witiko92:
Consider making the final product L or T-shaped, so that the drive goes along the side of the device rather than sticking out of it. It just works much better with most devices (and especially tablets.)
[Nexus 7 Accessories] quizface:
Why not do it U shaped, so the drive can go behind the tablet
[Nexus 7 Accessories] aalupatti:
Excatly what I want implemented. I dont this is difficult at all
[Nexus 7 Accessories] Maturola:
thanks, I was considering making the MicoSD insertion from the side instead of perpendicular to the device

This is a great idea and it is where I started, but there are 2 mian issues with that, MicroUSB (as I mentioned before, was design for cables not PCBs), doesn't have enough mechanical strength to hold by itself so you would have to design the case to fit tight on the device, which lea to issue number 2, this will limit the product to a single of device, you would have to make an specific model for each device (just not practical)

Other wise it will be just breaking inside the MicroUSB all the time.
[Nexus 7 Accessories] Maturola:
Kickstarter rejected the project

Kickstarter denied our project today, with not much information about why the project was rejected, the replay seen like a simple canned response to an appeal case than a original review, even when this was the very first time I submitted the campaign.

We are gathering all our resources and focusing on migrating the campaign to indiegogo.com. Show your support if you are still interested on getting one of the adapter, either by private message, twitter or blog. :good:

[main reason we want a initial headcount is to deice if we run an "all or nothing" (only get fund if you reach your goal) or a "Flexible Funding" where you get to keep what you collect with a higher indiegogo fee.
[Nexus 7 Accessories] matique:
I am still up for this, just tell me where to sign. Do I go to the idiegogo website?
[Nexus 7 Accessories] Maturola:
It is not publish yet, we are setting everything up with Paypal.

Here is the prototype casing we worked on this weekend
[Nexus 7 Accessories] quizface:
Nice job, congratulations, but I think it looks too bulky :crying:
[Nexus 7 Accessories] Maturola:
LOL :laugh: it is VERY bulky, That's is a simple case prototype, not even close to the final enclosure would be, I got HeatSinks, and wires all over inside that thing.

Final case should be around 5mm (0.18in) sorry for the misleading image, I am just trying to share progress.
[Nexus 7 Accessories] Aleemz:
I know I've shown this on another thread here, but this is my working prototype of a micro USB plug to female USB OTG adapter.

I'm just waiting for the parts to arrive to knock up the same design, but with micro SD reader instead of the female USB. However, I'd rather pay for one already done if I find someone selling them ;)
[Nexus 7 Accessories] Coolsaber57:
Cool, I can't wait to see the final product!
[Nexus 7 Accessories] WinDroidGuy:
I actually like this setup for some odd reason...how much for one? lol