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[GUIDE] DIY smallest Micro USB OTG to USB Adapter

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By Capt.PP, Senior Member on 6th November 2012, 08:28 AM
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Update: v.2! (half a penny)

Inspired by this video/OTG, pass to 0:47. Which I couldn't find one to purchase. This L design when plugged in is a bit smaller than a penny. No welding needed! Use (female USB for game controllers, mouse, ect). Designed with a case-on in mind.
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You'll need 3 parts for hardware. Micro USB OTG, Micro SD reader, ofcourse Micro SD card and a software of your choice to run it. I don't root so I'm using Nexus Media Importer.


Be safe and wear gloves. You don't want to get hurt for this mod.
======

Step1: Cut in the middle of the left or right side of Micro USB OTG. Be careful, use glove on the hand to hold it down. (note: the OTG link that i provided is the exact one that I used to mod, but you can find the cheapest parts from Amazon or Ebay, ect.).

Step2: Peel out the inner part of the OTG.

Step3: Cut the part closer to the Micro USB completely off (with wires still intact). Carefully peel the wires to the far end of the USB female. Then cut the rest of the plastic off like in the picture.

Step4: Turn the Micro USB end to make a L shape like in the picture. I used glue gun to clued it together. You can use electrical tape if you like. Enjoy!



**I'm not holding reliable for any injuries or broken parts from this mod, do it at your own risk**
This is the original size of the device when it's plugged in, it's about 3 size of a penny in length.


Step1-3
aaaa

Step4



================================================== ==================================


Version 2 still retained female USB for mouse and game controller or a case in mind.


==========
You'll required soldering, glue gun or electrical tape. (note: this version is a challenge to make. If you think you can solder the wires into the small spaces on micro USB's bins then proceed or you can make version 1 which required no soldering)

==========


Step1: Strip micro USB and female USB completely. (any spare female USB from old devices will do. Make sure you have the right micro USB end like in the diagram if you decided to get a spare)

Step2: Measure the wires as needed from micro USB to female USB. Then pre-cut the outer layer of the wires so you can bend at 90 degree angle with ease when wiring the wire along the sides. (careful don't cut the wires inside). Next, strip a few millimeter from both ends of the 4 wires.

Step3: I suggest to lay the 4 wires on top; along the micro USB and solder it in the pins. (though I didn't realized this obstruction was a big deal until it resulted in a bump on my model when wiring it downward). Curve your stripped end of the wires for easy soldering. A trick I used to solder the wires to micro USB is putting a thin foil paper in between 2 pins. After you're done, remove it and repeat until you're done.

Step4: Lay your micro USB on top of the solder point of the female USB at 90 degree to shape the L. (make sure no metal part of the micro USB touches the female USB sholdering point. You can lay it on top of the female USB but it will add a few millimeter thickness). Follow the diagram to solder all wires to the female USB.







Step3


aaaa v.2 when plugged in it's half a size of a penny. You're seeing USB plugged into the OTG with microSD inside.


**Credit to redgreenlaser for diagrams**
Last edited by Capt.PP; 29th November 2012 at 04:09 AM.
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6th November 2012, 12:04 PM |#2  
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Thanks for the "how-to", Capt.PP.
6th November 2012, 12:30 PM |#3  
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Thank you, with your suggestion, and pictures, I can also put the USB behind the tablet as a U, and maybe make it smaller without the USB (male and female) only the card reader
Last edited by quizface; 6th November 2012 at 12:35 PM.
6th November 2012, 02:16 PM |#4  
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I like it!

It's quite similer to the one I made:
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6th November 2012, 02:21 PM |#5  
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Quote:
Originally Posted by Aleemz

I like it!

It's quite similer to the one I made:

Cool, Aleemz, how did you make yours?
Last edited by ddlooping; 6th November 2012 at 04:18 PM. Reason: typo
6th November 2012, 04:17 PM |#6  
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If you want to make it smaller and you are going to the trouble of handsoldering and hot glueing, you can just get the Micro USB Plug

http://www.digikey.com/scripts/dksea...words=609-4051

Remove the USB shield, solder the Plug Directly to the USB traces, and Hot glue around it, you can reduce the size by half (maybe even more)
Last edited by Maturola; 6th November 2012 at 04:21 PM.
6th November 2012, 04:20 PM |#7  
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Quote:
Originally Posted by Maturola

If you want to make smaller it and you are going to the trouble of handsoldering and hot glueing, you can just get the Micro USB Plug

http://www.digikey.com/scripts/dksea...words=609-4051

Remove the USB shield, solder the Plug Directly to the USB traces, and Hot glue around it, you can get reduce the size by half (maybe even more)

Cool.

Maybe you should make some and sell them to those of us who don't have the necessary skills/gear/time...
6th November 2012, 04:24 PM |#8  
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Quote:
Originally Posted by ddlooping

Cool.

Maybe you should make some and sell them to those of us who don't have the necessary skills/gear/time...

I'm trying to do just that with my Indiegogo campaign.
6th November 2012, 05:26 PM |#9  
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Quote:
Originally Posted by Maturola

I'm trying to do just that with my Indiegogo campaign.

Nice one.
I'd rather use a USB flash drive but I've contributed nonetheless.
6th November 2012, 06:59 PM |#10  
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Storage DIY smallest Micro USB OTG to USB Adapter
Quote:
Originally Posted by Capt.PP

This is the original thread but it doesn't show how to make one. The purpose of this thread so I can do Q&A more direct without colliding with other topics in the original thread.

I think that, if I were to make one of these, I would make it in a "T" shape after removing the male and female USB connection, with the opening for the micro sd card facing in whatever direction seems best, so long as the card and its holder are parralel to the side of the device that the micro USB port is on. That way the whole thing would stick out no more than 5/16th's to 3/8th's of an inch when plugged in to the micro USB port and the protruding top cross part of the "T", that being the part with the micro sd card, would act as a grip for removing the device from the port.

(If that makes sense.)

k.
Last edited by kickofthecat; 6th November 2012 at 07:05 PM. Reason: typo
6th November 2012, 11:31 PM |#11  
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Quote:
Originally Posted by kickofthecat

I think that, if I were to make one of these, I would make it in a "T" shape after removing the male and female USB connection, with the opening for the micro sd card facing in whatever direction seems best, so long as the card and its holder are parralel to the side of the device that the micro USB port is on. That way the whole thing would stick out no more than 5/16th's to 3/8th's of an inch when plugged in to the micro USB port and the protruding top cross part of the "T", that being the part with the micro sd card, would act as a grip for removing the device from the port.

(If that makes sense.)

k.

You also have to look at cost effective here. The parts that was used only cost $1 for OTG, 30 cents for small USB, minus the Micro SD card. Though i'm not recommending 30 cents for small USB (they didn't clued it and harder to get the Micro SD card out) compared to the one above I recommend in the link.

The L design flushed with the screen surface and thinner compared to the bottom surface or a device as a whole. It prevented from accidentally snag the OTG when swyping on the screen. It's very easy to plug or unplug since you have a penny side in width (when you DIY you can add grips) and 2 penny side in length if you have a big thumb.

The T design, if i understand you correctly, you want to stick out above the screen a bit so you have grips to pull it out? I can ensure you the L shape have no problem of unplugging. Though you eliminated the female/male USB but it still lay hidden on the edge bottom of your device. Instead of buying new parts (may cost more) you can use the OTG I recommended to strip out all the white plastic to make it even smaller as you want to reduce in length when laying on the edge bottom. Cheer.

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