Hello Com,
Is it possible to be able to quick charge a tablet while having an active data connection at the same time?
Why I ask?
I want to build a solution where a tablet is connected to a pc. Both need to have a steady data connection as they share information and custom events. The tablet is for interacting with the user an will run a custom app. The computer is for controlling and operating other stuff the tablet is not capable of. Because of easy and fast substitutions, the tablet will have to stay in delivery condition - so modding the tablets hard-/software is out of question. The solution runs 24/7 and my current tests show that the power of the tablet is drained faster than it is recharged via the usb connection to the computer.
I tried to find accessories, but did not find any. All I found were ambigious information.
I know that the usb specification does not allow quick charge (more than 450mA) and a simultaneous data connection via a (single) cable. I thought of something like the splitted y-cable we know from external harddrives. Or maybe a custom adapter were you plug in an additional charger like those active usb hubs. I want to stay away from wireless data transmission (like using bluetooth and connecting a quick charger) if possible.
Therefor I ask of the general possibility of how to accomplish my task. If it is only possible with refaining from usb at all, then please tell me how.
(Please do not suggest solutions, without (at least theoretically) verifying them yourself first.)
Great thanks in advance.
Related
Hi!
I want to use my G1 to do some special measurements. For this purpose I've created a microcontroller board (Atmel ATmega8) that does that. Now I want to transfer the data the board collected to the Android phone.
Because of the high powerconsumption the G1 has while Bluetooth is on this isn't a real alternative for me - the measurements will last about 2 - 3 hours.
I'm not experienced concerning hardware access within Linux and Android but thought there might be a possibility to gain a kind of low level access to the USB port. I do neither need high bandwith nor real USB functionality - so might it be possible to create an own kind of bus using that interface? Do you have any other idea?
Thank you in advance!
If you use micro linux system, the ones that are like a usb port, a network jack and a vga connecter, you could script some adb commands and have it run every few seconds to upload the data, not an ideal solution. As far as I know the g1 doesn't support host mode. But if you have a micro linux computer in the middle, it could work.
Something like this
http://www.pcpro.co.uk/blogs/2008/08/27/a-real-space-oddity-arrives-at-pc-pro/
I'm sure there are other ways to do it, maybe check there how to make a serial port thread a few pages back in the dev section.
Hi guys
I should have posted this a long time ago but I thought I could find the info I needed scattered around the interwebs. But I can't. And also, I just don't have the technical knowledge to wrap this project up. Here's what I want to do:
I'd like to buy a cheap android phone to use as a webserver, with an attached external USB HDD. The actual website is on weebly.com and I only need to link in videos which will be on the HDD. The total amount of data is around 1TB and from what I gather I need to connect the following:
HDD -> usb hub with AC power -> android phone running PAW on AC power. -> wifi router -> internet.
However, my questions are:
1. If I use a USB OTG cable, can I remove the phone's battery to keep it always on, connected to the charger?
2. Can the phone handle both AC-charging and data-transmission at the same time?
3. Which phones can run this (supports OTG and PAW)?
My budget is around $200. I've seen people do some amazing stuff with their androids and OTG- cables, but can this specific task be done? Thanks for any help, as I am in an incredible hurry to get this going.
I often use the combination of a laptop with a smartphone on my way from home to work and back: the smartphone is used as an internetmodem for the laptop, and the USB-cable is used for the data-transfert between the 2.
Unfortunately the battery-capacity of the laptop is not enough to support both the use of the laptop and meanwhile charging the smartphone battery. So I would like to prevent the phone-battery to drain (too much) power from the laptop-battery. I can't switch off "charging through USB" in the phone since USB is the only available option to charge it. And -as I have learned from another thread in this forum- cutting the powerleads is no option too since the data-connection requires a minimumcurrent in order to work.
But what if I would modify the USB-cable with a small electronic circuit that would limit the current through the USB-cable to a value of about 50mA? That would be enough to enable the dataconnection but would prevent my laptopbattery being drained by the phone. Does anybody here have any experience with such a cable?
Is there a way to charge an android device while it is connected to the PC?
Assume the device is draining its battery very fast due to some video or gaming activity and the PC cannot keep battery level stable. I would like to connect it to a USB charger at the same time, does such an adapter exists? I am afraid of damaging the PC or the tablet.
It is important to note that I don't need the android to work in hosting mode (OTG) but just for file transfer and adb port forwarding.
Hello folks,
I am stuck and I hope you guys can help me out with a tip or two.
What I am trying to do is:
1) Connect my smartphone to a desktop through a USB cable (or OTG cable or anything that will do the job) and make the desktop think that a usb keyboard was connected to it and not a smartphone (hence no need for drivers installation).
2) After usb cable connection, the smartphone will be able to send keystrokes to the desktop.
Points of consideration:
* The desktop has no bluetooth nor wireless connections and nothing can be installed in it.
* installing an app (downloaded from store) into the smartphone is possible, but with no kernel modifications or root, I mean out of the box solution.
From reading those two great links:
[1] https://stackoverflow.com/questions...ogram-android-to-act-as-physical-usb-keyboard
[2] http://forum.xda-developers.com/showthread.php?t=1871281
It appears my best option is to use a USB cable with a "special hardware level converter " and attache it both to the desktop and smartphone. It will tell the desktop it is a USB keyboard and receive keystrokes from the smartphone, before forwarding them to the desktop.
My question is:
Does such cable exist?
If yes, where can I find it?
If not, is there a company that can help make it?
Thanks guys, Mozart