USB Host and full charging at same time. v2 - Galaxy Tab 7.7 Accessories

Our device is already quite old, but as a navigator or a video monitor in the car, he is able to perform its wonderful functions.
I wanted to make it work in the USB-Host mode and simultaneously charge current of 1-1.5 A. I tried different schemes, firmware, kernel.
That scheme, which allows the USB-Host and full charge at the same time.
Simple version:
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Complicated:
I used a reed relay type 2A and 1C.
After power on, 3pin and 4pin Samsung 30pin connector via resistors 33kOhm and 10kOhm are closed on the + 5V and the Gnd, the tablet starts full charging.
Push the button, self-locking relay K1, as well as closes 13pin through 20 kOhm resistor to the 15pin. Relays K2 and K3 switch 3pin and 4pin Samsung connector to 3pin and 2pin USB.
If the power is turned off relays K1, K2 and K3 are opened and the next occurrence of the power tab becomes full charge mode.
Capacitor C1 0,03F will delay the opening of the switch for 3-4 seconds, and allow time to safely remove the USB drive (Tasker: power on, usb drive on <- script / run shell / command: service call mount 7 s16 /mnt/sdcard/extStorages/UsbDriveA).

Related

Softbank X02T unbrick workaround

I sent my phone to Vietnam to unlock. I guess they could unlock (I’m not sure because, right now, I have no way to check). As a bonus they changed my rom to English but when i got my phone on my hand, I found out that pin 1 and 2 were soldered, the battery was used up (voltage was less than 3V) and it was not charging. I managed to charge the battery externally and after putting it back, when I pressed the power button, the green light blinked once and turned off. After some searching in the forum (http://forum.xda-developers.com/showthread.php?t=680927), I found out that shorting pin 1 and 2 can wake up the phone and I could start my phone. Then I found out a easy way to do that. Here is the way I'm doing it now.
1. Solder pin 1 and 2 with 2 small flexible wires like the picture
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2. Insert the sim and battery normally ( see the picture)
3. When starting, connects the two wires and press and hold the power button until Toshiba logo appears
4. Disconnect the wires and use the phone as normal(if you don’t disconnect, it will not charge).
Now you can charge, you can flash any English rom, do all the normal operations. Only drawback is when restarting, you have to open the back cover and connect the two wires again and disconnect.
Hope this will help unlucky X02t users until someone comes up with X02T's rom

[Q] Does the G-Tab not charge off USB?

It doesn't look like it to me. Is this true? This would be a show-stopper for me. Thanks.
Found the answer: No.
http://forum.xda-developers.com/showthread.php?t=984368
Well that sucks.
If it's any consolation, neither does the Xoom. I think once you hit the larger tablet form factor, you can expect USB charging to go out the window.
Yeah, 5V DC at less than an amp is only supplying around 4.5 watts of charging power. You're looking at 7 hours or thereabouts to charge via USB. If it's any further consolation, the iPad can charge via USB, but only high power USB or when it is asleep. It will still take a long time. Still, it would be nice to have the option even just to keep it topped off while near the computer.
sci2 said:
Still, it would be nice to have the option even just to keep it topped off while near the computer.
Click to expand...
Click to collapse
Amen!
Anyway I find the overall battery performance on the G tab pleasing!
What about something like this?
I have this:
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which is powered externally via 5V DC at 3A amps. It has USB ports on the bottom and even comes with a USB-to-DC adapter for the Sony e-Reader.
Since this isn't a regular computer USB port (I guess), could this type of setup theoretically work with the GTab and, if so, is there some type of USB-to-DC cable that would work?

You guys should totally get a [near-]free USB dongle...

I think the picture says enough:
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Note that everything is on, and it's all connected, powered, and recognized by the LTE.
- 480Mbps hi-speed USB Hub
- 3TB Hitachi USB 3.0 Hard drive
- SanDisk Cruzer 32GB flash stick
- Inland Pro wireless mouse & keyboard combo dongle
- Generic USB fan (not recognized by the LTE, but it's not supposed to be -- it works fine)
- Powering everything but the cat, but the process seemed to energize him too
All of these are operating simultaneously in the picture. You can see the fan revolving, the the sandisk processing (red behind the slider), the big hard drive chugging (blue light), the hub operational, ...the keyboard and mouse worked fine but there's no way to show it in a pic, so you'll have to take it on blind faith.
What was this thing's max power output again? Surely this can't be healthy for the battery (or circuitry) in any case.
Welcome to kickstand tablet 2.0 heaven. You may check your sanity in at the door. /nerdgasm
Hmmm.... You know it took me awhile to figure it all out and that's a cool pic man. Can u try and get the whole cat next time? Idk what the rest of that crap you're talking about does.
Jk. Nice setup. I like black cats too is all.

[Working] HooToo (HT-CT01) Micro USB OTG + 4 port charging hub

In an effort to streamline my adapters & cabling behind my TV, I decided to purchase this hub. What attracted me to this was the combination of OTG + charging/powering capabilities. This hub is perfect for charging/powering usb-connected devices (i.e.-miracast adapter, chromecast, cell phones, tablets, & gaming controllers). Around Christmas time, I picked this up on sale for about $14 with coupon code.
Pros
Charges/powers up to 4 USB devices
OTG works!
Pros
~1ft USB OTG cable
Must use super short provided cable for OTG
Only one port on hub is for OTG
OTG port plugging into the Nexus Player is in the front
My biggest gripe has to be the super short cable provided. When I first purchased it, the cord was too short for my liking (approximately 1 ft). Because of this, I went straight for my micro USB cable I use for my OnePlus. For some reason, that didn't work. I didn't think to try the super short cord. After nearly giving up on it, I gave the short cable a try. Naturally, that cable worked. To make up for the short USB cable, I used an old 3 ft USB extension cord I had lying around. All in all, I am happy with this hub.
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docking station that fits the mate 20 pro?

I have a docking station based on USB 3.0.
it has the following inputs:
5 USB 3.0
DVI, VGA, HDMI
AUX
1GB Ethernet
micro and sd card reader
And a single output: USB 3.0 which plugs to my laptop and shares everything.
illustration:
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(the blue cable is the USB 3.0 male to male from the docking station to my laptop. the black one is type c for charging my laptop)
it even works if I plug it after a USB 3.0 to type c adapter
illustrations:
I tried to plug the huawei the same way, using the adapter but it didn't quite work
the USBs and the aux worked but the monitors and ethernet didn't..
I'm pretty sure its because the windows laptop downloads drivers when you first plug it and the huawei doesn't.
* just to mention, plugging the huawei directly to hdmi adapter (the same golden one from the pictures) and through HDMI cable into the monitor does work and brings the EMUI desktop mode.
I know that there are other docking stations based on USB type c (USB 3.1 or thunderbolt 3), but if I'm buying a new one I wanna make sure it works with my phone as well..
Does anyone know about a docking station that works with the huawei mate 20 pro?

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