yashsingh1/xdaforums huggingface dataset:
[Galaxy Tab 10.1 Accessories] Bxsteez:
That is sorta what I thought but i'm not 100% sure of the current output of charger and at the same time I'm thinking a 500mA draw would be like charging the device through any USB port which I agree would be slower but might still be adequate for this use since i'm thinking if you are using this configuration it will be sitting for a while. Maybe if I could even balance the power draw with the power output. Then it wouldn't charge but it would die either. Who knows....

I'm trying to get some information on the signals on the 30pin. I'm not sure if the pin 7 and 8 are inputs for the charging circuit. I might just have to buy a cable and break it down and find out.
[Galaxy Tab 10.1 Accessories] used2hvatreo:
Is this information what you are looking for?
[Galaxy Tab 10.1 Accessories] Bxsteez:
I've found this so that pretty much answer my questions. I will get started on a block diagram and schematic. I have to do a little research on the power consumption of USB Hard drives.

---------- Post added at 09:44 AM ---------- Previous post was at 09:44 AM ----------

haha that is hilarious. That is exactly what i was just posting about lol..
[Galaxy Tab 10.1 Accessories] Bxsteez:
Let me know what you think of this.... It is a rough idea of how I think the circuit should work.

****EDIT***(FIXED ERROR)
[Galaxy Tab 10.1 Accessories] Tivo7:
I didn't completely analyze it, but with a quick look, it looks pretty good.

I don't see any serious circuit issues that could really mess something up. (there could be data connectivity issues, i don't know much about all that)
[Galaxy Tab 10.1 Accessories] Bxsteez:
I'm thinking i might have some Serial data issues but I'll have to hook up a scope to my first build and see. If i do I will just have a some line drivers in there and that should clear up most of those issues. I think the on the other side of the connector on the GTAB there are some line drivers/buffers so I might be OK. I will try and build a board tonight and get a bill of materials written up and try this thing out.

---------- Post added at 01:35 PM ---------- Previous post was at 12:45 PM ----------

I did not expect to run into the situation of not being able to find the female gtab connector. I might either change the design to two USB ports, one male and one female or I might just buy a desktop dock and create a board of the same size and install it in there.....
[Galaxy Tab 10.1 Accessories] jonnyg1097:
I love that there is discussion about this. If you guys end up being successful with this I would definitely pay to get one.

Id love to see a (micro) sd slot as well as the other slots previously mentioned but maybe I am getting a bit greedy.
[Galaxy Tab 10.1 Accessories] Bxsteez:
That might be possible... I dunno about that one. I think after I get the non powered USB hard drive as well as the Host + Charging working i'm going to try and get HDMI to work as well. Then i'm going to have to buy a Gtab 7inch dock... UGH.. :P
[Galaxy Tab 10.1 Accessories] used2hvatreo:
mine gets delivered tomorrow, i will try and find the link but I got it for like $18 + free shipping. Getting HDMI working is going to be next to impossible though. The tab outputs in MDL or MHL or something like that, and you need a decoder chip that will make that into regular HDMI, hence their stupid accessory. IF someone wanted to bust open that little guy, we could try and locate the chip they use. Its the same thing they use for a lot of their devices.
[Galaxy Tab 10.1 Accessories] Bxsteez:
That shouldn't be a big deal assuming the chip isn't super expensive. I would think I could bust open the 7inch dock and see what part they use or use a different device. I'm sure the one they use isn't the only game in town..

This is the circuit I have for the switching of the 5V in and out. Don't pay too much attention to the resistor values since they haven't been fine tuned yet. Tell me what you guys think..
[Galaxy Tab 10.1 Accessories] used2hvatreo:
Looks great, post your your board layout when you are done and I will take a look at that as well, but I think it should work. As far as the decode chip, I will look around for that
[Galaxy Tab 10.1 Accessories] Bxsteez:
I think i've decided that instead of modifying the actual desktop dock i'm going to make an adapter that can either plug into the tab by itself or to the other docks. It will also give me the ability to remove the female 30pin connector which no one sells.

What do you guys think?
[Galaxy Tab 10.1 Accessories] used2hvatreo:
That was what I was thinking about doing originally. You can do the pass thru for power and just use a USB micro female instead. The only thing you might want to incorporate is the data lines so that people can plug straight into this adapter from their pc so that they can do transfers and whatnot without removing the adapter and plugging the 30-pin back in

As far as MHL is concerned, the chip we want is a MHL bridge. I don't know if anyone else makes them, but here is one:

MHL Bridge
[Galaxy Tab 10.1 Accessories] Bxsteez:
Well that might be a bit more complicated but not impossible. That would mean I couldn't strap the ID to USB host. It would have to change depending upon what device is plugged in. Not impossible... Maybe i can use some sort of a varistor setup. Let me think about that idea and see if I can come up with a way to adapt that resistance.
[Galaxy Tab 10.1 Accessories] used2hvatreo:
Are you thinking about it adapting automatically, or would a switch be the easier way to go?
[Galaxy Tab 10.1 Accessories] Bxsteez:
A switch would be easier to design but more cumbersome for the user. I'm thinking of it doing it automatically.... assuming i can figure out a way.
[Galaxy Tab 10.1 Accessories] used2hvatreo:
Why not just another port? You can put a charging port, usb host port and usb data port.
[Galaxy Tab 10.1 Accessories] Bxsteez:
That is a good idea but i believe there are is only one serial pair for the Tab. Then you would only be able to use one at a time but I might make two ports that are different. That would help with the confusion. Maybe a USB B for syncing and USB A for USB Host. Hmmmmmm... I have to think about it a bit. I have to make this adapter as cheap as possible too so i have to be a little relaxed on the circuit components.

It sucks not being large enough to buy 10000 FETS or resistors. They are expensive when you only buy like 10 or 100. So far the parts are only 2 or 3 bucks, of course that is excluding the PWB and whatever housing i use to package this thing.
[Galaxy Tab 10.1 Accessories] Bxsteez:
I was looking over my schematic this afternoon with a coworker and it looks like i have my PMOSes oriented incorrectly and on top of that the ground from the wall is likely to be floating so the circuit won't work as it is now. I have to go back to the drawing board and correct it. I will update......

Still trying to figure out why my simulations worked.
[Galaxy Tab 10.1 Accessories] used2hvatreo:
Your simulations worked because you have used the same ground everywhere. If you are using the NI Circuit Designer then you definitely have the same ground. When you switch over to design your board, you will have to run a trace for the ground as well, but in the circuit design phase it lets you simulate by just putting the ground symbol there.

As far as the ports go, I was thinking the same thing. mini-USB for charging, micro-USB for data. As far as host, I'm not sure what can and can't be done at the same time.

Also, I was just looking around, and maybe the version 1 answer for HDMI is to simply map the MHL lines to another micro-USB port, and then allow the use of other cheaper usb to hdmi adapters, like the one I found for 11.99 on amazon
[Galaxy Tab 10.1 Accessories] Bxsteez:
Oh i know why the grounding the p-channel gate worked and why it won't work in real life but it was the fact that the P-channel is backwards and the output still worked.

I think i figured it out. I think current is flowing because the voltage is biasing the body diode and the current flows enough to raise the source voltage (load voltage) enough to breach the threshold point and turn on the FET. Its all kinds of wrong with the right answer lol. It was a silly error on my part. I have another idea but its going to force me to add a third FET which I was trying to avoid.

On the connectors. I don't think the ternminals for Micro USB can carry enough current to support chargin the tab at 2A. I could be wrong. I think cellphone charges use 1A. I have to check on the specs.
[Galaxy Tab 10.1 Accessories] used2hvatreo:
I was definitely going more for the idea of multiple diff ports so it would be straight forward as to which port did what, but yeah, def check it out, would hate to be responisble for burning up something because it couldn't handle the amps
[Galaxy Tab 10.1 Accessories] jonnyg1097:
Are there any updates on this? I would hope this is still getting done-
[Galaxy Tab 10.1 Accessories] Bxsteez:
No updates yet. I've been kinda swamped with work so I haven't had a chance to update the schematic or start on the layout. Its coming though
[Galaxy Tab 10.1 Accessories] mailings:
Did you made this? I'm really interested in building this as an adapter. I have a Galaxy Nexus and a TAB. With shomething like this I could use the same MHL to HDMI adapter with both devices.
[Galaxy Tab 10.1 Accessories] used2hvatreo:
No, while this thread has kinda stalled and I don't have any time to fab anything of my own, I just used the Galaxy tab (original) dock with the Tab 10.1 dock tray, and that gives me my charging plus HDMI out.
[Galaxy Tab 10.1 Accessories] mailings:
Ok, Thanks anyway
[Galaxy Tab 10.1 Accessories] jonnyg1097:
aww man i was hoping this mod would take off and actually happen.
[Galaxy Tab 10.1 Accessories] ro_explorer:
Hi guys,

Since I've used info from this topic I feel like I should post also here my achievements :).

I've successfully modified my tab 8.9 original dock to add USB host and AC charge to it.

Here is the Tab 8.9 topic: http://xdaforums.com/showthread.php?t=1610832
[Galaxy Tab 10.1 Accessories] jonnyg1097:
Congrats! Perhaps people here will now attempt it. I know its something I want to give a shot to try and get done.
[Galaxy Tab 10.1 Accessories] Equalixer:
Ever made this dock? sounds freaking awesome!
[Verizon Droid Charge] absens:
Nice, I'm totally getting on of those. Thanks!
[Verizon Droid Charge] yutzybrian:
I wanted to get a Kraken II in red but the belt holster is too important for me to risk it. I've read a lot of bad reviews on Trident's Kraken belt holster so I went with the Otterbox. Props for the comparison though!
[Verizon Droid Charge] blahdc:
Great reviews! Just curious, if you could only get one case which would buy after trying out all three of the cases the Aegis, Kraken II or Otterbox...
[Verizon Droid Charge] moondrius:
I ordered my blue Kraken II on ebay 5 minutes before you posted this. Red and blue are not available on the Trident site as of yet but there is a seller on ebay that has them and the rest of the colors for $33 with free first class shipping. I was waiting to jump on this case because I either wanted the red or blue. Thanks for posting the comparison, the case looks great.
[Verizon Droid Charge] Rememo:
I'd go with the Kraken 2. It's not quite as nice to hold as the Aegis, but you can't beat the protection and features.

I forgot to mention that the HDMI cover on my Aegis didn't want to stay closed. It was getting annoying.
[Verizon Droid Charge] blahdc:
Sweet thanks! Now I'm torn between the red or the green. Red might be a little too flashy, I'm leaning towards the green.
[Verizon Droid Charge] BleedsOrangeandBlue:
That's a bunch of case.

I have the Aegis, and it seems huge enough as it is. I don't know that the "additional" protection is worth it. I don't see the need to have my buttons covered and the top portion of the phone is covered by my clear screen protector. Due to the lip on the Aegis, if you drop it, its not going to land flat on the screen as it is.

But, if you're into the belt holster thing, I guess that's a plus. The kickstand would never get used for me either.

I do wish that the Aegis had the Kraken's dust covers though. My HDMI cover is really easy to uncover (though it doesn't ever fall open like the previous poster's did, thank god) yet the charger cover is rather difficult. Looking for a silver lining, I guess that is a good thing that the slot that has an opening to the inside of the phone is the best sealed.

I just couldn't deal with that bulk. Thanks for doing the side by side. It reaffirmed my happiness with my purchase, but I did want to offer my perspective for the people who are looking to buy one of the two. I'm certainly not lambasting anyone's opinion or purchase.
[Verizon Droid Charge] moondrius:
I am glad I am not the only one that feels the same about the Aegis dust covers. Hdmi too easy to open and usb too hard.
[Verizon Droid Charge] Rememo:
Update: In my review, I said "You have to be more precise with your finger swipe to access the pull-down menu, because the hard case limits your finger movement near the top of the phone. I will adapt to that."

Well, I don't think I will be able to adapt. It's driving me nuts. I'm using the Zeam launcher and when you swipe the home screen with that launcher, it takes you to the app. drawer. When I'm attempting to use the pull down menu in the limited space that the Kraken 2 provides, I'd say that 50% of the time I end up in the app. drawer.

So... I'm not sure if I'll be using the Kraken 2 as my permanent case. :(

In fact, I'm thinking of going the other direction now and trying the Case-mate Barely There. I told you I get bored easily. :p
[Verizon Droid Charge] yutzybrian:
This drove me nuts with my Otterbox too. Easy fix: use ADW Launcher. If you swipe down anywhere on the screen it pulls the notification bar down.

Also how well is the belt clip working for day to day?
[Verizon Droid Charge] xceebeex:
I have never had this issue with any case I have owned (I don't currently have a case on my Charge at the moment), but that is one of my favorite features of ADW that I use all of the time.
[Verizon Droid Charge] Rememo:
I tried the ADW launcher for a while, along with others, but I always come back to Zeam. So... I can't give that up.

The belt clip is working great so far. Time will tell....
[Verizon Droid Charge] moondrius:
I got my case today and it is kind of hard to hit the notification bar at times. I might stick with the Aegis. The only thing I like more about the Kraken is its easier to pull out pockets then the Aegis.
[Verizon Droid Charge] 2pezboy:
I just ordered a Kraken 2 for my Charge today. My only hesitation is the holster, which is a must-use for me. Thanks OP for the great write-up!
[General Questions and Answers] markawashington:
I had the big boy Evo Epic and now got a Kyocera Echo when i heard 2.3 is coming to it and it was free on Amazon .... Best phone so far I love the dual screen which is by far best for reading ect. Where is the dev support? Someone teach me i will do it geez . IMO its the best phone out of evo and epic ... just lacks 4g bu who cares really its not that serious for it but would be nice also the battery life is better then evo and epic.
[HTC Sensation] Vinny702:
I bought a Sensation and the other day my screen cracked when I dropped it, so i bought a screen digitizer replacement but it did not come with instructions =[

I'm freaking out because I have no idea how to do this and I spent 45 dollars to replace it! Can someone please help!? PLEASE! =[
[HTC Sensation] The Radius Kid:
Got a good picture of the backside of your new screen?

Connections,etc?
[HTC Sensation] Vinny702:
http://www.amazon.com/gp/product/B00597J4I8

thats what im working with.... does that help?
[HTC Sensation] The Radius Kid:
That shows me the connector strap....but all is not lost.

I opened mine.:)

There's two small screws up top on either corner.

Two just below the battery pocket on either side and two on the bottom corners.

It looks like there may be a hidden one in the battery pocket,next to the contact terminals,under a round dot sticker.

They look like they may be #4 Torx head .. just a guess.

Get those out [remember their positions] and it should be fairly easy.
[HTC Sensation] Vinny702:
after that will the screen come off or is there a technic for doing that?
[HTC Sensation] sromer:
take it back to the shop and get it fixed?
[HTC Sensation] kabuk1:
If you lived in the Oklahoma City area I'd say bring it in to my shop & I'd get you all fixed up(I'm a phone/computer/game console repair tech) but I dunno what area you're in, so... Replacing screens is generally pretty easy but I REALLY recommend you take it to a phone shop if you don't know how to do it. These phones are extremely delicate & you could break it VERY easily with one wrong move. But if you insist on doing it yourself, this should hopefully help you out some with getting it apart- http://www.youtube.com/watch?v=WG7gt1EnN3w It's kind of fast & ****ty, but it's the only teardown vid I could find.

FYI- digitizers are stuck on with special double-stick adhesive that holds it in place over the LCD, so make sure the one you bought came with a new piece of adhesive because you can't reuse the old one(unless you're VERY careful) & the screen won't stay on w/o it. You'll wanna use a heat gun on a low setting or a hot hairdryer to get the old digitizer off too. And of course, be mindful of dust.
[HTC Sensation] bronson2:
I just did exactly this repair and took some footage while doing it. Excuse the crappy voiceover.

On youtube.com go to watch?v=T5bWl73O9ss Or just search for HTC Sensation Screen Repair

Apparently my old account was disabled so I had to sign up again. Now I can't post a single URL. :( Hope someone else can make that linkable.
[HTC Sensation] The Radius Kid:
This one?:

http://www.youtube.com/watch?v=T5bWl73O9ss
[HTC Sensation] Oomike:
if you've never done that before, I suggest (as I do to all my customers to save pain and money) find someone with knowhow, and kindly ask to look over their shoulder. this has worked for me on many many occasions. I know know how to windshield chip repair for one (although completely unrelated;))
[EVO 4G Q&A, Help & Troubleshooting] koda4life:
This is probably completely a result of my stupidity but I rooted my phone a while ago. I had a nandroid back up set before i flashed to any custom roms just in case anything happened. Then i flashed to the back up again and wasn't running any custom roms. it was just still rooted because i never got a chance to unroot it. I then installed an update not thinking about it at all and im pretty sure bricked my phone. When it first happened it had two green arrows in a circle around another green arrow pointing down at a picture of a phone. I pulled the battery and drove home all day. I just got home and tried to turn it on and nothing is working. The charge light is not coming on when it is plugged in, vol up+ power and vol down+power button doesnt work. it seems like nothing i can do can turn this phone on. any ideas on how i can fix this? :(

ps. i have also checked and made sure the battery works and everything
[EVO 4G Q&A, Help & Troubleshooting] davidc23:
seems like you bricked it, your not support to pull out during any installation radios,updates..etc. keep it on the charger for a while and then try to boot up or try to go into hboot again
[EVO 4G Q&A, Help & Troubleshooting] koda4life:
i didnt pull during the installation. i let it download and install and it rebooted by itself. so it seems like everything was installed properly it just bricked afterwards :( any idea? thanks for the help though
[EVO 4G Q&A, Help & Troubleshooting] plainjane:
If you pulled the battery during the arrow pointing at the phone stage, you're bricked. That was most likely a radio update, and pulling the battery during that will give you a phone that'll never turn on again.

When exactly did you pull the battery?
[EVO 4G Q&A, Help & Troubleshooting] eeeeeeeeek:
yeah, you can't pull the bettery with that logo on, sometimes after an update the phone will go into that mode where it seems unresponsive but it always pulls through. If you pulled it out during that time then the previous posters are correct and you likely have a very handy paper weight (hope you have insurance, or have a clean phone that has no damage so you can claim a warranty issue). If you didn't pull the battery during this time and it just died or powered off on you then you could have a battery issue, while unlikely it doesn't mean that it isn't possible. I would take the advice and let it sit on the charger overnight, if that doesn't wory then I would just take it to sprint and play dumb. If it's bricked and won't turn on then they won't be able to tell that it was rooted, just say you plugged it in at night and woke up and it was dead. Not that i'm an advocate of screwing sprint, but we put up with ****ty wimax so whatcha gonna do....
[EVO 4G Q&A, Help & Troubleshooting] davidc23:
yep, if you got insurance just go to sprint and tell them you updated to 2.3 and then it just shut off (:
[EVO 4G Q&A, Help & Troubleshooting] koda4life:
damn, i didnt realize that it was still updating. thanks for the heads up, it's definitely bricked lol but i have insurance thankfully. best way to go about getting a new phone? is there a specific excuse i should use or just play dumb? but thanks for all the help. i really do appreciate it
[EVO 4G Q&A, Help & Troubleshooting] anthonyandrews:
As others before me have stated, just tell sprint that you ran the "new update" and it restarted your phone and now it does not work.

Make sure you don't mention anything about being rooted or pulling out the battery....
[EVO 4G Q&A, Help & Troubleshooting] koda4life:
okay thanks again!
[EVO 4G Q&A, Help & Troubleshooting] {ParanoiA}:
Gotta love Insurance fraud! No wonder my insurance premium just went up.
[EVO 4G Q&A, Help & Troubleshooting] Rem3Dy:
So insurance premium raising never has to do with wanting higher profits? And this whole time I thought insurance companies were blood suckers.

All jokes aside, insurance fraud is not cool.
[EVO 4G Q&A, Help & Troubleshooting] Dreddge:
insurance companies deserve to pay. Especially auto insurance. ****ing highway robbery.

Sent from the bowels of my mind.....
[EVO 4G Q&A, Help & Troubleshooting] RileyGrant:
It wasn't root that bricked his phone, it was HTC and Sprint pushing an update without instructing users properly. He pulled the battery thinking it was stuck. It was an accident. Just like dropping or losing your phone. That's what insurance is for.
[EVO 4G Q&A, Help & Troubleshooting] kalehua4791:
possibly bricked evo 4g's

i just received 2 evo 4g's from a friend that couldn't get them to start up and was wondering if there was a procedure beside power and down volume buttons...i have tried holding them down for about 5 mins and also just holding down the power button by itself to no avail.....any help would be greatly appreciated.....;)

ps they were plugged in all night and also made sure the battery was working by putting it on another evo and they also work....just wanted to see if anything else comes to mind.....btw they are out of contract so no insurance..
[HTC Sensation] chefp2010:
How do I s-on to return old phone to tmobile or do I not need to do it, will they see revolutionary if I don't s-on
[HTC Sensation] kylez64:
Read the first thread in the dev section
[XPERIA X10 Q&A, Help & Troubleshooting] magnusmagnus:
Okey. I've installed a high performance rom after root. It worked perfectly until i decided to try to update to 2.2 through SEUS.

In the process it failed, and now I can't turn the thing on! It will not even go to flash mode anymore! The only thing that works is after taking the battery out, it vibrates as i try to turn it on. But no responce.

No power

No flash mode

What to do!!?? :confused:
[XPERIA X10 Q&A, Help & Troubleshooting] JMeister234:
According to the post above yours, try putting the battery back in while pressing the back while plugged in (not usb charger).

Good luck.