yashsingh1/xdaforums huggingface dataset:
[HD2 General] motoi_bogdan:
Ok guys, so nuclear war stroke the planet, your brand new tv and pc got busted in the initial attack and you're left with your precious HD2 running some custom rom and about 16-32gb of storage. Hope you don't get borred, there won't be many apps on marketplace, or even a marketplace (servers got busted by the nuke :( )

Now to get more seriously i can't figure out why i would need a phone able to be powered on 24/24. But i guess at least it could be useful on camping trips or stuff like this.

This is the start of a project, are goals are something like this:

1. reverse engineer the charge algorithm used by HD2 (in involves at least 2 charging modes each with 2 stages, as i know so far)

2. assemble or buy a 5-10W solar panel (only the panel and a Schottky type fast diode)

3. get myself some old laptop batteries and strip them down for cells and controllers.

4. design and assemble a cell pack as a buffer between the solar panel and phone

5. design a switching mode voltage stabilizer and make a custom usb hub in order to also have usb host functionality if i feel geeky and need linux

6. design a charge controller for the cell pack when using solar power.

7. put all things together and test

The goal is simple. Although there are solar batteries that provide some extra juice to laptops or pda's they function somewhat like 2-3 hours discharge, about one day in full sun to recharge.

I want a system that can power a full load working hd2 (worst scenario) non stop (day and night) including cloudy days, nuclear winter or whatever. The system must also be able to power about 3-4 usb devices and sustain a full 500mA drain on each port while still being able to power the hd2 non stop. Aaah, yes, the thing must be portable, plug&play, reliable and maintenance free. At most, it should have the size of a regular 15 inch laptop and about 2kg weight (all things included).
[HD2 General] cdesai:
When are we getting it?

:D
[HD2 General] motoi_bogdan:
i guess it will take about 1-2 weeks to do the job.

i'm also involved in 2 more projects, it could be done as soon as i finish my automatic dog feeder with video-streaming over internet, food sensors and audio feedback. :))
[HD2 General] T-Macgnolia:
Hey facdemol I am not as versed in electronics as you are my friend. So my question to you is this is something that someone with a fair level of intelligents can attempt also? Secound is this, is the list you give in your first post all some one needs to try this? I would really like try this myself and maybe correspond my findings with you. Also thank you totally of you ammazing knowledge filled posts here on XDA.
[HD2 General] conantroutman:
lol.... Im not sure how to respond to this :confused:

Cant wait to see how it turns out, best of luck :D
[HD2 General] kevin37:
sounds interesting!
[HD2 General] SMS92:
Good man, keep us updated however things turn out... you sound like someone who isn't afraid of experimenting with electronics for the thrill!

Sent from my Nexus One
[HD2 General] Blaggah:
Wow! Pretty interesting
[HD2 General] T-Macgnolia:
Hey facdemol I thought you might like to check this article in the Portal out if you have not already. Looking forward to hearing back from you here on your project.
[HD2 General] motoi_bogdan:
good article, was inspiring :D

stage 2 and 3 are completed. Now working to design a high performance dc-dc (switching mode) converter that would take 8.4V input and give me some 5V @ 2.5A output for hd2's charging and the usb hub. Some work needs to be done here and some careful testing, if for whatever reason this converter fails, hd2 motherboard could get fried :p Working on a way to implement some safeties, also i'm studying the way older pda's and pna's used switching mode power supply's and converters. I'm thinking i could either salvage one of these modules or build one specifically for hd2.
[HD2 General] motoi_bogdan:
Update : found a way to make this pretty DIY for anyone with basic electronics skill (so that you can avoid designing switching mode converters, making PCB's, winding coils etc).

I found some dirt cheap car adapters that output 5v (pc usb jack) and can be used for various usb charging enabled devices. I'm testing to see their performance with my custom battery pack and the solar panel. Results are pretty good so far, i managed to run them stable at arout 5.5-6Volts input voltage. 2 of these will be required for this project (2 amp max current) or one if the output transistor inside is changed or a heatsink is mounted on it. I will come back with results and in the end, a guide with the required modifications.
[HD2 General] motoi_bogdan:
The second post contains the updated progress on this project.

Third post will contain some sort of guide for a DIY assembly of such device.

These are updated daily.

If everything goes smooth, i guess i will posting some pictures and guides to build such things, by the end of this day or tomorrow.

Current features of this design :

- 10watt solar panel module

- 14400mAh battery module - cell pack designed as 3p2s

- 2 charge modes (slow - similar to a pc's usb port and fast - similar to hd's wall charger)

- 4 powered usb ports (usb host capable)

- 1 high-power usb port (it can charge any device requiring 5V at around 500mA - 1500mA)

- uses standard usb-microusb cables, no need for other hacks or special cables

- feels geeky :D
[HD2 General] T-Macgnolia:
Sounds greet I will bee waiting to see what you have come up with man, this could be something that can change how we can use our HD2s on the go. n:D

Keep up the good work facdemol, I am also waiting to see if you post any more power consumption results in your other thread.:)

I would like to ask anyone reading this to help vote this to be published in the XDA portal by clicking the vote bottom at the top right of the first post by facdemol, he deserves recognition for his great work with this project and his others.
[HD2 General] RetroVertigo:
Very Interesting ! Good luck with the project! will be following to see what develops!
[HD2 General] Strat87:
I love this. Great concept.
[HD2 General] motoi_bogdan:
it took a while to charge the independent cells to the same level and to form a pack. The charge alignment is a must, otherwise, the battery back will discharge at an uneven rate among each cell. One done properly it should allow the maximum battery life and no future maintenance.

I've done some testing on it, already hooked up the hd2 to this thing, it's working properly, both charging modes, usb host etc. I guess i'll come back today with the guide and pictures to make this, it took the better part of yesterday to manually charge/discharge each of the 6 cells in the pack.
[HD2 General] motoi_bogdan:
updated post 3, half of the buid is already done and operational. The battery and hub+charger module needs to be linked up to the solar panel and some of case to be built. :)

There are some pics and one video with the thing working. Just basic testing for now, i just finished it.
[HD2 General] liberiano:
Very interesting...great job mate...
[HD2 General] Curious!:
mann, where is the rest of the post. The rest was the most important part :)

Very nice work I should say as an EE guy. Keep it up.
[HD2 General] thewarhawk:
solar powered lapdock

throw in a small keyboard/touchpad combo and a portable monitor then you basically have a solar powered lapdock! Or in other words, probably the most powerful computer to survive the apocalypse lol:D
[HD2 General] starkiez:
amazing

This sounds awesome. Is it feasable to build a solar battery cover? It can replace a normal battery cover and have a diode between it and the phones battery, but I guess the phone wouldn't know its charging and would lose calibration?... :/
[HD2 General] wouternet:
Cool built! Me wants :o

But em ever heard of EMP? http://en.wikipedia.org/wiki/Electromagnetic_pulse :D
[HD2 General] motoi_bogdan:
nuclear blast generated EMP.. erm not a problem, come on.. it's the 21'st century, we don't use nukes. We use H bombs. They are "cleaner" :D

Anyway, if you see that damned white flash, make sure to wrap the hd2 in some aluminum foil.

I'm thinking to make another thing, since i've used the solar panel to a small robot i made.. hmm, i always wanted to make a mustard or ketchup powered phone charger. Anyone interested? :D
[Android Software/Hacking General [Developers Only]] AlicexXx:
I really don't know what to do i'm so lost and i've been crying for an hour over this

i clicked "mount" "unmount" on my phone and did super one click http://xdaforums.com/showthread.php?t=803682 and then it said waiting for device i took out my usb cord and called it quits but now my phone browser wont work i have a samsung galaxy S G4 and i need my phone browser for a lot of things even work and its pretty much the only thing i use my phone for and its making me cry so bad what do i do im so confused my boyfriend said he'd help me but he didn't not at all he doesnt even care

so i mounted my sd card when i wasnt supposed to but i dont know how to fix it

do i erase all the data from my sd card?
[Android Software/Hacking General [Developers Only]] suraci:
Root...

hello.

I have a LG Swift 2.1 but want to 2.2 or 2.3

but the computer does not detect my phone via usb cable

drivers installed and nothing

I do not have access to Superuser

I can not get into SetCpu

what to do?
[Android Software/Hacking General [Developers Only]] phonehunter59:
Try downloading another internet browser from the market like skyfire or dolphin and if that doesnt work ONLY and ONLY then do the steps below

0.BACKUP

1.Pull out your battery and put it back in.

2.Press VOLUME DOWN+CAMERA+POWER and wait till the Samsung sign goes away.

3.You should see a screen with either blue or green text if not repeat the above.

4.Use the volume buttons to navigate to where it says factory reset or something similar (I have a custom recovery on mines and it looks different so it might not be those exact words_.

5.Press the power button (dont hold) to select it then wait for it to finish then restart the phone.

6.Remember when I said back up above. This is where it comes handy just put back everything you had before. *****Dont blame me if you didnt back up and lose all your data************

Here is another way thats easier but the above method is recommended.

1.make sure the phone is on (I like exact instructions and im sure other people do too)

2.press the menu button.

3.Press on settings.

4.scroll down to privacy settings and select it.

5.press factory reset device.
[Android Software/Hacking General [Developers Only]] phonehunter59:
First of all for the computer part did you make sure you have usb debugging off it could also be your usb cable or usb cable port or the computer but there is a way around if your phone came with a micro sd card adapter if not you should really go buy one it saved my butt many times when getting stuck just put the micro sd card into the adapter and put the adapter into the memory stick slot on the computer.

*If the above didnt work to fix the usb method try a different cord and if that doesnt work dont go on just stop reading otherwise you will waste your time.*

Now for the SetCpu,and superuser are you rooted or did you just download superuser from the market,If your not rooted you should download z4root from 4shared.com or Super One Click root from the file attached below, extract and run it.*make sure usb debugging is on settings->applications->Development->usb debugging

If you are rooted try re-rooting(you dont have to unroot) using the above.
[Desire HD Q&A, Help & Troubleshooting] macross12:
ok so now have core droid rom installed, was having problems with auto sync keep saying force close, so read somewere to do recovery, wipe /factory reset. seems to of sorted the problem but the boot screen is different. just shows the old android logo now.. so what else will of changed if the boot screen has changed.. shoold i reflash the rom....

thanks
[Desire HD Q&A, Help & Troubleshooting] Flussen:
Yes, do a factory reset and.reflash. then u have a clean, fresh install

Tapatalked with Tapatalk from my Desire HD using Tapatalk.
[Desire HD Q&A, Help & Troubleshooting] macross12:
can i reflash without using wipe 1.3.zip. or do i have to wipe then reflash
[Desire Q&A, Help & Troubleshooting] strapy:
I wont to remove some apps from ROM before flash, so how can i do it...

please help...
[Desire Q&A, Help & Troubleshooting] TheGhost1233:
By searching.

If that's to difficult try removing the .apk's from the zip befoer flashing. Don't extract the zip and turn signature verification off when flashing.
[Desire Q&A, Help & Troubleshooting] strapy:
I tried it but it does not work .. Yet thanks

I will seek further
[Desire Q&A, Help & Troubleshooting] TheGhost1233:
Then it's the backup function of some stuff in the system partition that restores them. You should be able to find how to add/remove stuff from that list.
[Desire Q&A, Help & Troubleshooting] davebugyi:
Delete them from the .zip file? Using total commander and always worked.
[Defy Themes and Apps] wouternet:
Hey Guys,

I just have a small question:

Since the Motorola Defy has a slightly different resolution, can you still play and use apps like Angry Birds? I heard that some apps don't work on non-conformant resolutions...

Thanks in advance,

Wouternet

PS: How Bulky is it?
[Defy Themes and Apps] Kaffeekranz:
I have yet to find an app that doesn't work on the defy.
[Defy Themes and Apps] LetoKynes:
All the apps I've tried have worked fine, including Angry Birds (both the normal version and Seasons, I've tried 'em!)

It's actually quite slim but I've added a gel case onto mine which makes it slightly bulkier. I completely forgot its actual size - you can imagine my surprise when I took the cover off for cleaning :P
[Defy Themes and Apps] wouternet:
I am going to buy also the Otterbox Commuter, but maybe it will be a bit to much.

I'm going to put on the otterbox only when i know i'm going to be outside. Hunting, going to the beach etc
[Defy Themes and Apps] wouternet:
Just to be sure,

Anybody uses WhatsApp on the Defy??
[Defy Themes and Apps] lanfearxt:
i use whatsapp all the time...why?
[Defy Themes and Apps] ofmb:
the defy has paratically the same resolution as samsung galaxy s

(only 4 extra pixels on length)

i've never encountered a problem in an app due to resolution

WhatsApp and skype working flawlessly
[Defy Themes and Apps] Antszej:
There are not only 4 but 54 extra pixels i think. :)

Every games and apps are running great, there are no problems in resolution (no blank spaces)
[Defy Themes and Apps] ofmb:
true - 54 always usable extra pixels :)
[Defy Themes and Apps] drakeM:
defy has exactly the same resolution of the new xperia play, and of almost all the android moto too (droid, milestone etc etc...)
[Defy Themes and Apps] bobbyphoenix:
Believe it or not the Defy (along with the other phones that have the same resolution) actually has the correct widescreen ratio at 16:9. All the other ones (Desire HD for example) are 16:10, so if anything the other phone's resolutions would make their display not show correctly as long as programers do it right, and program for correct 16:9 resolution.
[Galaxy Tab Q&A, Help & Troubleshooting] smccaldin:
I've just acquired a tab and playing with the custom roms available.

On my dell streak you can increase the pixel density, which effectively gives you what appears to be a higher resolution screen... http://xdaforums.com/showthread.php?t=1003525

Is cheating, but very effective in most cases... I.e. I have a 6x6 grid of icons on my homescreen, whereas on the tab I can only do 5x5 despite having an extra 2 inches of screen!

My question: are there any roms out there that let you do it? And/or is it possible on the tab?

Cheers
[Galaxy Tab Q&A, Help & Troubleshooting] TheATHEiST:
You don't need a rom to do it you just need to edit your build.prop file and set the density you want. You will need to be rooted though to edit the file.

Alternatively you can just download a density changer app from the market and you can set it easily with that, although it only lasts until reboot.
[Galaxy Tab Q&A, Help & Troubleshooting] biohaz55:
LCD Density Chager from the market will do this for you and allow you to save the changed density so that it applies it when rebooting. It does require superuser and also rooting (I think).
[Desire Q&A, Help & Troubleshooting] status_six:
I'm interested to know if

a) JIT is running in my device/rom and

b) if not can and should I enable it?

I have googled and searched xda extensively and don't see anything specific to device (desire) and rom (oxygen 2.0.3 gingerbread).

So far I have tried the following:

using adb shell>

adb shell getprop dalvik.vm.execution-mode

does not return "int:jit" - it does not return anything.

http://www.unrevoked.com/rootwiki/doku.php/public/how_to_enable_jit

checking my build.prop file, I do not see

"dalvik.vm.execution-mode=int:jit" or

"dalvik.vm.execution-mode=int:fast"

but I do have

"dalvik.vm.heapsize=32m"

"dalvik.vm.dexopt-flags=m=y"

"dalvik.vm.stack-trace-file=/data/anr/traces.txt"

So I surmise that JIT is not enabled unless there are any other checks I can try?

Does anyone have experience of using JIT with desire & oxygen? There are a number of tutorials for enabling JIT by editing build.prop in adb, but none I can find for the desire, so as usual wary of bricking!

Comments or ideas appreciated!
[Nook Color Android Development] rigy73:
Edit: work is in progress on this, as soon as there are updates, u'll know about it.

The patches that were released were for getting nook in the main linux kernel.

Turns out cm7 team might have a few more goddies for you:)
[Nook Color Android Development] urbanengine1:
best reserve this just in case
[Nook Color Android Development] urbanengine1:
now for a real post...

Great! keep up the good work

rep+
[Nook Color Android Development] rigy73:
Thanks for reserving the post, as u can see am a total noob here :)
[Nook Color Android Development] urbanengine1:
hahah, not as bad as some others....

anyway, can we get a mod to change the maker of my first post to rigy?
[Nook Color Android Development] pokey9000:
Try looking at the Archos gen8 kernel sources. They use OMAP36XX and a similar PMIC if not the same one. I don't think the NC has a charge pump and don't think you can rely on ID to detect an otg cable.

Good luck!
[Nook Color Android Development] jtbnet:
Great Idea... I had questioned whether we just picked up this functionality in CM7 build of our drivers at least... so I plugged my Lexar flash drive formated FAT32 into a USB to micro USB adapter and plugged it into the Nook and rebooted to see if the the nook flashed the pwr to the drive as usually happens during init on other devices but unfortunately no luck... it doesn't pwr the conn during init...

But I've got plenty of devices I can test with if you get to a point that would help...
[Nook Color Android Development] rigy73:
Okay thanks for that info, can you try something like a keyboard with both standard mirco usb cable and B&N cable, try restarting and then send me the dev logs.

You can send logs with aLogCat
[Nook Color Android Development] dalingrin:
Evergreen has done a good bit of work on this already. He will be back next week.
[Nook Color Android Development] hololight:
I've also been actively working on this.

I have gotten the musb into a_idle in the past and also just echoing host into mode seems to start some of the transition. I'd pin seems to be a lost cause and I gave up on. It already.
[Nook Color Android Development] rigy73:
Good to know other people too have been working on it.

can u also share your progress here, so that we can increases the resources.
[Nook Color Android Development] ParMaster:
TPS65921

It looks like rigy73 has already uncovered most all of what i've been able to pull together as well as some extra testing information. So glad everyone who has been looking at / working on this is coming together to share.

Here is a link (if needed) to more documents regarding TPS65921:

http://focus.ti.com/docs/prod/folders/print/tps65921.html

It contains the datasheet, and under technical documents has register manual.
[Nook Color Android Development] Gin1212:
This. I mean with this no more worrying about bluetooth keyboards! And hopefully we could even get crazy things like ddr pads working ;p. Talk about the ultimate game system on the go.
[Nook Color Android Development] rigy73:
Two kernel patches added.
[Nook Color Android Development] Ophbalance:
Have you contacted anyone on our CM7 team to include it in the kernels (fattire, dalingrin, etc)?
[Nook Color Android Development] rigy73:
I haven't tested it personally, nor do i have any proof that it is actually working, it can be included once we know that there are no problems in the code.
[Nook Color Android Development] Gin1212:
Really interested in seeing this happen =D.
[Nook Color Android Development] dalingrin:
The patches are from the CM7 team :)
[Nook Color Android Development] rigy73:
That's what i figured too, who else would want to make nook more awesome.

And has anyone been able to get this working?
[Nook Color Android Development] lekofraggle:
THANK YOU!

Sorry for the screaming, but this is amazing. I was just looking into this this morning because, RcketScientist is working on a camera raw patch. This is the last thing my Nook needs. I am not great at compiling, but I will help when things get a bit more stable. Is this going to be able to patch the stock kernel? Will it be flashable? or incorporated into a new build? Sorry if I am jumping the gun.

Leko

P.S. Check out the app...

http://www.anthonymandra.com/RawDroid/?author=2
[Nook Color Android Development] Ophbalance:
Good deal... does that mean it is in/will be in the kernel at some point?

I also assume that there is some kind of usbB -> whatever converter available out there?
[Nook Color Android Development] PatF:
http://www.newegg.com/Product/Produ...816146&cm_re=micro_usb-_-12-816-146-_-Product
[Nook Color Android Development] chisleu:
This will be very cool. I just wonder what would be the best thing there? A camera?
[Nook Color Android Development] Gin1212:
I'm hoping for External Hard Drives and Game Controllers (Specifically DDR pads) =D.
[Nook Color Android Development] bled82:
external hard drive and gps support would be great , keep up the good work guys , let me know if any testing is needed i can try and help .
[Nook Color Android Development] joenathane:
The best thing would be to connect two nooks together to mate and create a baby nook :)
[Nook Color Android Development] FractalSphere:
That's cool, but does the Nook have a standard Micro-USB port? I know it charges at a higher than normal voltage (1.9v instead of 5a 1v).

Personally, I think a small clip-on USB webcam would be ideal for the Nook. :P
[Nook Color Android Development] bled82:
Looks like amazon has some cheap ones also http://www.amazon.com/USB-Micro-Adapter-Converts-Devices/dp/B0027YYMU6
[Nook Color Android Development] rigy73:
I was hoping that some developer would be able to compile the kernel but since on one is coming forward, it seems i would have to do that, normally i wouldn't have any problems with that but right now i don't really have time because of my studies.

So can someone who already has a build environment setup please try this.

Also i wanna ask any member of cm7 team why was the patch made for 2.6.38 kernel instead of the one that we are already using?
[Nook Color Android Development] fpb:
Some minor corrections:

Tension is fixed at 5V. Current drain (intensity) is 1.9A instead of normal 0.5A from USB ports.
[Nook Color Android Development] ADude:
In order to provide connection to standard USB products (like external hard drives), does this product have some sort of small chip inside ?

Or is it just a matter of connecting the plugs together ?
[Nook Color Android Development] mr_fosi:
Pretty sure there's no chip in there... The different USB form-factors are just that, not different data formats.
[Nook Color Android Development] Nburnes:
I believe you need that adapter and a powered USB dock thingy.