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I made a USB dongle that plugs into the USB port on the touchpad and provides a powered female USB-A port. It is basically a portable USB charger/battery with an OTG cable soldered to the USB port. Attached is a quick pdf showing the process. It's much smaller and more portable than using a y-cable and powered hub or battery pack.
The charger is $13 on Amazon with free prime shipping and OTG cables around $2 on ebay.
It's nice because it's small and I can secure it to the my case with a rubber band, providing a quick connection to a keyboard/mouse or usb flash drive. The particular charger charges via any powered USB port with a provided cable.
This is the battery pack I ordered, note the picture on the amazon page is not 100% accurate:
http://www.amazon.com/T-Mobile-Port..._1_1?s=wireless&ie=UTF8&qid=1325984238&sr=1-1
This is the cable I purchased, there are cheaper ones, but they ship from China:
http://www.ebay.com/itm/Micro-USB-O...ccessories&hash=item1e69fbb3c5#ht_1336wt_1398
Would that be powerful enough to power external portable hard drive like WD Passport?
gedas5 said:
Would that be powerful enough to power external portable hard drive like WD Passport?
Click to expand...
Click to collapse
Unfortunately, I don't have the power specs on the battery pack. If I come across a USB-powered hard drive, I'll test it.
scarletwahoo said:
I made a USB dongle that plugs into the USB port on the touchpad and provides a powered female USB-A port. It is basically a portable USB charger/battery with an OTG cable soldered to the USB port. Attached is a quick pdf showing the process. It's much smaller and more portable than using a y-cable and powered hub or battery pack.
The charger is $13 on Amazon with free prime shipping and OTG cables around $2 on ebay.
It's nice because it's small and I can secure it to the my case with a rubber band, providing a quick connection to a keyboard/mouse or usb flash drive. The particular charger charges via any powered USB port with a provided cable.
This is the battery pack I ordered, note the picture on the amazon page is not 100% accurate:
http://www.amazon.com/T-Mobile-Port..._1_1?s=wireless&ie=UTF8&qid=1325984238&sr=1-1
This is the cable I purchased, there are cheaper ones, but they ship from China:
http://www.ebay.com/itm/Micro-USB-O...ccessories&hash=item1e69fbb3c5#ht_1336wt_1398
Click to expand...
Click to collapse
that looks nice.. but you re saying that its plug and play?..
you dont have to mount/unmount?
why didnt you get one w/ more usb ports?
your pics are clear.
i wonder how easy it is to do the battery hub like yours but w/ 4 usb ports
Nicely done, very good solution and tutorial. again excellent!!!!
amkaos said:
that looks nice.. but you re saying that its plug and play?..
you dont have to mount/unmount?
why didnt you get one w/ more usb ports?
your pics are clear.
i wonder how easy it is to do the battery hub like yours but w/ 4 usb ports
Click to expand...
Click to collapse
http://www.amazon.com/Solar-Powered-Battery-Charger-Adapter/dp/B006DVMW92
This hub has 4 ports, a battery plus solar charging. That said, if I buy it I'll probably just plug it directly into the OTG cable rather than solder them together. Then again my soldering can be a little rough.
- Sent from a Prime terminal using a friends account
So can we only use the Micro Usb OTG host to connect to a USB drive/keyboard?
tpcm said:
So can we only use the Micro Usb OTG host to connect to a USB drive/keyboard?
Click to expand...
Click to collapse
yes plus 10char
Deserves sticky, love mods like this even if not always practical.
Cant believe they didnt give the touchpad a powered usb host. I guess they figured people would have issues with not enough power or drain the battery too quick with it.
So I think when I have some spare time I may mod your mod and show how to make a powered usb host that plugs into the wall charger so when your "docking" somewhere to charge you can hook up a keyboard and use it without restriction and even be charging the touchpad at the same time.
Probably don't even need to be too creative a proper Y cable may do the trick out the gate. Just to track one down.
Probably a stupid question, but it wouldn't be my first one...
Could you simply use a USB male-to-male cable to go between the battery pack and the OTG cable? Eliminate the soldering that way?
Or am I missing something?
I found a cable that I think will work perfectly for my idea of doing this from the charger instead of from battery: http://www.dealextreme.com/p/usb-fe...gb-tf-card-card-reader-kit-for-xtc-clip-82289
You can do it much cheaper with adapters and a regular y adapter though, and you may want to do so, so that you can have a longer cable from the charger to the y split, but yeah I will try this out sometime soon and let you know how it works.
The charger probably gives enough power to easily run things like a external HDD and such while the battery pack may not.
@Vicious ... couldn't that possibly put too much power to a USB device? Just saying since it is probably meant to be hooked up to a regular USB 5v port and (I don't know the specifics but) the touchpad USB power adapter has a high AMP output (might be talking sht here).
Nothing to worry about a device only "pulls" the amperage it needs so you can have extra with no harm to the device. It is the voltage that needs to match and usb is standard 5v.
Having too little amperage can actually cause a device harm due to malfunction, like a head crashing on a 2.5" hdd during use or a thumb drive failing to flash properly corrupting a sector.
I feel anybody that uses the touchpad in a docked setting that wants to use a keyboard may very well make use of my idea, that I of course got from the OP's idea.
I'll part it out for the cheapest way to make it without any cutting/soldering and test it soon enough.
mountaindewmi said:
@Vicious ... couldn't that possibly put too much power to a USB device? Just saying since it is probably meant to be hooked up to a regular USB 5v port and (I don't know the specifics but) the touchpad USB power adapter has a high AMP output (might be talking sht here).
Click to expand...
Click to collapse
That cable will work fine. I wasn't doing anything special, only eliminating the y-cable. I mainly wanted a small form factor way of adding a USB port to my case for portability. Now I can put a movie on a usb drive and watch it on the go.
You generally don't have to worry about using a supply that is to powerful. As long as the voltage output is 5 V, the device will only draw a certain current and consume the corresponding amount of power. The rating on a constant voltage supply is simply the maximum current it can provide, the amount it provides depends on the properties of the device.
Say you have a device, it states it operates at 5 V and draws 100 mA of current. That means the impedance of the device is R = V / I = 50 ohms. So if you use a 5 V supply rated to at least 100 mA, the device will only draw 100 mA. The supply can be rated for 100 mA or 1000 amps, it does not matter. (Although you wouldn't want to use 1000 A source as if something breaks or shorts it can draw a higher current)
Wikipedia "ohms law" if you are not familiar.
I tried to do this but can't get it to work, the touchpad shows the charging battery icon only it's not charging, and running dmesg it say source=charger mA=100 and usb otg exited low power mode and then right after says it entered low power mode... Not sure what the issue is...
edit: I'm thinking it may be my soldering work, gonna give it another pass...
joenathane said:
I tried to do this but can't get it to work, the touchpad shows the charging battery icon only it's not charging, and running dmesg it say source=charger mA=100 and usb otg exited low power mode and then right after says it entered low power mode... Not sure what the issue is...
edit: I'm thinking it may be my soldering work, gonna give it another pass...
Click to expand...
Click to collapse
You may have the two data pins shorted together. To the best of my knowledge, this tells the touchpad to go into charging mode. The touchpad charger does this, because in order to charge, it must draw more power than USB ports are designed to provide.
You need to remove the two resistors circled in the PDF. These keep the data pins shorted together as well.
This is a really great idea I think I might try it and your tut is very well explained thanks for taking the time out to put it all together
Thanks
Mouse works fine, keyboard hasn't been tried yet. How do you access a flash drive through this? What are the steps?
If you just cut out the resistors in the battery hub, could you just use the TP's regular cable to plug into one of the ports on the hub?
tpcm said:
Mouse works fine, keyboard hasn't been tried yet. How do you access a flash drive through this? What are the steps?
Click to expand...
Click to collapse
Stick mount works great
Sent from my CM9 TouchPad
I have a MHL Adapter and I get video just fine. Now I want to be able to sit on my couch while i use the adapter. Seems to me the simplest way would be to use a 15-20 foot Micro USB Male - Micro USB Female extension cable.
Does anyone have any experience with such a setup? Do you have a recommendation for such a cable?
TIA!!
Why micro USB? You can get a HDMI cable as long as you might want (Monoprice is particularly good). If it's not enough you can carry a HDMI signal over a single or (simpler to find) two CAT5 cables w/ RJ45 jacks for hundreds of feet.
I guess the thought was that if I have the Micro USB Extension, then it's one thin lightweight wire that has to travel across the floor.
If I did HDMI, I'd still have to be near power whereas with Micro USB, I could set the power adapter, and HDMI, and MHL Adapter all together and then have a thin and lightweight wire traveling across the floor.
But if it's not possible, (micro USB limitiation??) then HDMI it would have to be.
bean1975 said:
Why micro USB? You can get a HDMI cable as long as you might want (Monoprice is particularly good). If it's not enough you can carry a HDMI signal over a single or (simpler to find) two CAT5 cables w/ RJ45 jacks for hundreds of feet.
Click to expand...
Click to collapse
If the micro USB works it would be much cheaper than a comparable length hdmi cord.
Sent from my SAMSUNG-SGH-I717 using Tapatalk
I would test http://www.amazon.com/Extender-over-CAT5E-CAT6-connection/dp/B003L14ZTC this. It's hard to get cheaper than cat5e.
Just bought 10 feet on amazon! Lovely!
Sent from my SAMSUNG-SGH-I717 using Tapatalk
I wanted to do exactly this - extend the cable but at the micro-USB end to avoid having the Micro-usb power supply line and the bulky MHL adaptor all where the phone is - much cleaner to just have a thin cable coming out of the phone and headed towards the TV.
I did get hold of a micro-USB extension cable (2m/6ft) but unfortunately it does not work. Directly plugging the phone into the MHL adaptor works perfectly, as soon as I insert the micro-USB extension it doesn't work. I need to have a closer look to check the pins are populated etc, but not sure why this would be an issue - don't think it can be signal strength and if all the pins are populated I don't see why the adaptor would care.????
Any thoughts?
Micro B USB extension not working
I, too have been trying to figure out why an extension cable doesn't work the way you think it might. Today, I tried cutting my 6 foot cable, first making sure I had the right power leads working. Then I went through all the possible combinations of connections to see if one would work. None do. I'm at a complete loss on this wondering what I should try next.
Thanks for info....similarly baffled but at least you have ruled out something!
Like the other guy said, get your x for of hdmi cable, then just plug your AC charger in where you are. Mhl might use additional connectors/pins/whatever vs micro USB. Or you can go totally wireless and use a Bluetooth mouse and keyboard.
Also I remember I had a charging issue with an extension. Sometimes one product works better than others. I can't charge my phone with my 20 dollar AC charger from best buy since the ICS leak. It's weird. Hdmi cables are pretty uniform, I would just extend that.
Sent from my SAMSUNG-SGH-I717 using XDA
Yes, that works, always has, but that's not the point. Would rather have just one long cable connected to the phone in front of the TV rather than three cables, the device and the phone in a kludge setup.
A partial answer
This allows connecting 6 feet away with a thin, flexible single cable..Also cheap, but shipping takes 15 days.
goo.gl/NzCik
Gavdroid said:
I did get hold of a micro-USB extension cable (2m/6ft) but unfortunately it does not work. Directly plugging the phone into the MHL adaptor works perfectly, as soon as I insert the micro-USB extension it doesn't work. I need to have a closer look to check the pins are populated etc, but not sure why this would be an issue - don't think it can be signal strength and if all the pins are populated I don't see why the adaptor would care.????
Any thoughts?
Click to expand...
Click to collapse
I took apart the two cables and the USB has four wires while the MHL cable has ten.
are the mhl wires easily extendable themselves by splicing? I'm thinking strip out a few usb cables and use the wires? Or just go purchase some extremely thin gauge wire (22 gauge) and make it yourself?
Micro B USB extension not working
The Micro B USB connector only has 5 connections, so there is no way you can connect 10 from the MHL cable to it, so something else is going on.
pinoutsguide.com/PortableDevices/micro_usb_pinout.shtml
amblix said:
are the mhl wires easily extendable themselves by splicing? I'm thinking strip out a few usb cables and use the wires? Or just go purchase some extremely thin gauge wire (22 gauge) and make it yourself?
Click to expand...
Click to collapse
I bought splices and thought about extending the cable. It's possible.
galaxy s3
I did wanted to do the same but the extension cable didn't work. I looked at the connecting points and felt that the micro usb from Mel adaptor is to bit longer than usual so I thought that may be the reason and I shorten it resulting damaging my Mel adaptor itself. Now I am going for allshare cast wireless hub. So everyone please don't try to cut the micro usb pin from your adaptor or u will better decide to for my option to for complete flexibility.
I want to do this EXACT same thing but slightly more extreme:
I want an MHL adapter with 10-25 feet of micro USB cable on the end so I can use it from anywhere in my living room.
Is there any such cable/adapter?
Why do all MHL adapters come with only a 5 inch cable??? It is maddening!
*bump* I am looking for this too.. but I have a reason slightly different.. I have an AppRadio in my car that I connect my phone to. The MHL cable end is rather bulky and does not fit into the opening of my otterbox that is on my phone... most microUSB wires fit into the opening just fine.. Taking my phone out of the case every time I am in the car is rather ridiculous so I bought the micro USB extension (bought a 6" one).. didn;t even register except to charge... So, and ideas would be greatly appreciated..
Teej53214 said:
*bump* I am looking for this too.. but I have a reason slightly different.. I have an AppRadio in my car that I connect my phone to. The MHL cable end is rather bulky and does not fit into the opening of my otterbox that is on my phone... most microUSB wires fit into the opening just fine.. Taking my phone out of the case every time I am in the car is rather ridiculous so I bought the micro USB extension (bought a 6" one).. didn;t even register except to charge... So, and ideas would be greatly appreciated..
Click to expand...
Click to collapse
Get a different MHL adapter. I use an adapter close to the one 7 posts up by hedaleth with my kenwood system in my truck.
Anyone know about a splitter that will take the 30-pin input and let you use one side for the 30-pin power adapter and the other side for 30-pin accessory like USB OTG pigtail?
I'm in the same boat,
Search and search but nothing,
You get USB to 2 30-pin but nothing for 30-pin to 2 30-pin adapters
The only option you have is to buy a Galaxy Tab break out board from Kinetica and solder your own cables to it..
What do you want to use at same time?
It would be nice to run external power while having an accessory plugged in such as the SD or USB drive or keyboard. I have 2 USB keyboards that have the pointing device built into it.
look in m y post in the make your own cables thread.
i added power to the odks circuit board and can watch movies via hdd at same time as charging.
easier way would be use the breaK out board though..
I have the connector parts, just I have to know the pin assignments...
http://forum.xda-developers.com/showthread.php?t=1155065&page=11
Look at this thread..
Try my post first one before this page..
It explains it..
pin 7 is the posative 5v @2amps...
pin 30 is the earth..
(this is how i run it in car connected to 2 amps 5v source)
works well and if start close to 100 percent battery power leave it plugged in it doesnt drop anything even after watching 4 movies in a row still is 100 percent.
eventually i disconnected it to let the battery drop down alittle as not sure if good to keep it at full charge?
Maybe the best way would be try to follow my dock mod?
that way you can just use the 30 pin usb adapter and add a powered hub.
havent given an update on "line out" output as my usb adapter is covering it up
the outlet socket.might consider opening it up again and finding out if works then relocate the 3.5 stereo socket outlet.maybe could just solder some wires to it inside and add a new output some where else more accessable..
This is a bit of an old thread, but thought people might like to know that I have found a solution! DealExtreme has a splitter that has 2 OTG connectors and a charging connector....
3-in-1 30 Pin Male to USB Female OTG Hub Cable for Samsung Galaxy Tab - Black + White
http://dx.com/p/3-in-1-30-pin-male-...ble-for-samsung-galaxy-tab-black-white-153246
Here is the link to the cable post .
http://forum.xda-developers.com/showthread.php?t=1155065&highlight=cables
ToastyZ71 said:
This is a bit of an old thread, but thought people might like to know that I have found a solution! DealExtreme has a splitter that has 2 OTG connectors and a charging connector....
3-in-1 30 Pin Male to USB Female OTG Hub Cable for Samsung Galaxy Tab - Black + White
http://dx.com/p/3-in-1-30-pin-male-...ble-for-samsung-galaxy-tab-black-white-153246
Click to expand...
Click to collapse
Havent seen that cable before...anybody tried it?
Just curious IF and HOW it works...
I modded my dock to accept charge and host at same time but only triggers charge when hdd is connected whilst power applied.
I've got one from ebay. But its very poor quality. Its functionality is OK, but you cannot charge the Tab. External power is used to power the USB devices. It switches between internal Tab 5V and external 5V when applied. It ok with USB hdd that needs power.
o.k. thanks..
Cant help but wonder about the possibility of using it as charging and host at same time by using different resistor than 20k.not sure if you guys seen the thread about host and charging on galaxy s3 (hw mod) but they discovered a different resistance value 40.2k that could make the power part of the usb travel in both directions at the same time allowing this to happen...
im thinking the same could maybe happen for our 7.7 tab.
rEVOLVE said:
Anyone know about a splitter that will take the 30-pin input and let you use one side for the 30-pin power adapter and the other side for 30-pin accessory like USB OTG pigtail?
Click to expand...
Click to collapse
Chdck this out. Haven't tried yet, but this ought to work.
http://www.ebay.com/itm/130707719450
Sent from my GT-P6800 using Tapatalk 2
Manipur said:
Chdck this out. Haven't tried yet, but this ought to work.
http://www.ebay.com/itm/130707719450
Sent from my GT-P6800 using Tapatalk 2
Click to expand...
Click to collapse
Ordered. Will report back once i get it.
ToastyZ71 said:
This is a bit of an old thread, but thought people might like to know that I have found a solution! DealExtreme has a splitter that has 2 OTG connectors and a charging connector....
3-in-1 30 Pin Male to USB Female OTG Hub Cable for Samsung Galaxy Tab - Black + White
Click to expand...
Click to collapse
Ordered this one few days ago but unfortunately it's not in stock and they don't know when they will have it back in stock so, are there some other options?
rEVOLVE said:
Ordered. Will report back once i get it.
Click to expand...
Click to collapse
Hey, did you get it? How is it?
Hi,
Does anyone has any idea why the micro-USB connectors which are used to connect a HDMI or VGA cable to the micro-USB port of the Samsung Galaxies are longer than let's say a data micro USB connector?
I've tried a micro-USB extension cable, and they don't work with these video-output connectors because they're too long. When I looked inside the connector I noticed that all the connection points are way down the connector, and that the upper part is just extra. So I've tried filing off the upper part. Now it charges the phone, but still no video output.
Thanks!
Never mind, just found an answer to my question
Apparently the dock / video out connectors are 11 pin micro USB connectors. The data and charging cable connectors are 5 pin.
Now to find an extension cable for that. I wonder if this excists.
It would be much easier to find HDMI/VGA extension cable rather then the 11 ping micro usb.
golalmo said:
It would be much easier to find HDMI/VGA extension cable rather then the 11 ping micro usb.
Click to expand...
Click to collapse
Indeed, but the problem is that I want to extend the dock connector so I can put my Note 3 next to my dock to put it in landscape.
I tried to hook up a game controller via the OTG adapter and it appears to not send any power out from it. Even with a USB thumb drive and other USB C adapters, nothing seems to work. Has anyone else noticed this? You can transfer data via the cable just fine, but I find it strange it doesn't send any power through the plug.
Have you tried connecting it the other way round?
tomixnscale89 said:
I tried to hook up a game controller via the OTG adapter and it appears to not send any power out from it. Even with a USB thumb drive and other USB C adapters, nothing seems to work. Has anyone else noticed this? You can transfer data via the cable just fine, but I find it strange it doesn't send any power through the plug.
Click to expand...
Click to collapse
I noticed the same thing. I believe it's because once it comes out the other side with the 5-pin adapter, it is then reduced to the old micro-usb specification, which uses 5 wires. True USB-C connection has like 20 or 24 pins. I was able to get a couple very basic OTG of things to work, like a mouse and a thumb drive. BUT HERE IS THE CATCH - The mag connector has 5 pins, reduced from 20-some on the C connection.. so true USB-C connection is no longer possible once you get on the other side of the connector. So the trick is to NOT use a USB-C OTG when it's in the case with magnetic adapter. You must use a Micro USB OTG with a Micro-to-C adapter attached to that. Even so, not everything worked just by sticking on the Micro-to-C adapter.. Mouse and a thumb drive worked, but my ethernet adapter and VGA/HML/HDMI adapters did not. Out of the case, I can use my USB-C to HDMI cable to display on my TV. But same cord does not work with the magnetic adapter with the case. It is simply not possible because the reduction of contact pins from phone to case to magnet.. One more thing to consider, if you're trying to do anything other than charging, make sure the magnet is on the right way.. there's a little logo it should be in the front.
If I can come across a spare or broken Dual Screen case, I'd be curious to take it apart and see if it would be possible to rig it up with a better plug for the case.. find which wires go to the workings of the DS and leave them intact, but then try to replace the magnetic pins with a female C plug that has all the contacts intact still..
Seymour_Asses said:
I noticed the same thing. I believe it's because once it comes out the other side with the 5-pin adapter, it is then reduced to the old micro-usb specification, which uses 5 wires. True USB-C connection has like 20 or 24 pins. I was able to get a couple very basic OTG of things to work, like a mouse and a thumb drive. BUT HERE IS THE CATCH - The mag connector has 5 pins, reduced from 20-some on the C connection.. so true USB-C connection is no longer possible once you get on the other side of the connector. So the trick is to NOT use a USB-C OTG when it's in the case with magnetic adapter. You must use a Micro USB OTG with a Micro-to-C adapter attached to that. Even so, not everything worked just by sticking on the Micro-to-C adapter.. Mouse and a thumb drive worked, but my ethernet adapter and VGA/HML/HDMI adapters did not. Out of the case, I can use my USB-C to HDMI cable to display on my TV. But same cord does not work with the magnetic adapter with the case. It is simply not possible because the reduction of contact pins from phone to case to magnet.. One more thing to consider, if you're trying to do anything other than charging, make sure the magnet is on the right way.. there's a little logo it should be in the front.
If I can come across a spare or broken Dual Screen case, I'd be curious to take it apart and see if it would be possible to rig it up with a better plug for the case.. find which wires go to the workings of the DS and leave them intact, but then try to replace the magnetic pins with a female C plug that has all the contacts intact still..
Click to expand...
Click to collapse
Thank you @Seymour_Asses ! I saw here https://twitter.com/konic0s/status/1202966945693220865 that LG G8X supports USB-C to HDMI adapters but I didn't know if it also worked with the Dual Screen case but now I know it doesn't, thanks for the information, very helpful ! :good:
BTW I think that when you connect the Dual Screen case to the G8X it uses the dedicated USB-C high speed pins of the G8X for video-out so these pins are not available anymore for other HDMI out, I'm not sure about it and don't have any proofs but it seems you are right about not enough pins on the mag connector.
If i remember correctly, the manual states that most USB-C functions wont work though the dual screen case. I think there was some speculation that its due to most of that bandwidth being used for the second screen.
Quite simple: the Mag USB-C adapter is for charging only. It drives me mad as i have a professional USB-C headphone that I use for conferencing.
But I understand the reason: when in dual screen, the USB-C data connection is in use dor the second screen, enabling the USB-C connection beyond that requires a hub to be built in the case "before" the DS connection (so it wont work building it in the dongle itself).
I wish LG went with a Pogo connector on the bottom or on the side to activate the DS case. This would have made the chin slimmer and freed up the USB-C port.
Anyway, it is what it is now, and i will not trade my LG G8x DS for anything at the moment... Until maybe that Surface Duo phone for which I might need to sell a vital organ ?