yashsingh1/xdaforums huggingface dataset:
[Nexus 7 General] JOAOOx3:
I do it the simply way i found, i flashed smoothrom then overwrite with usb-rom, its possible because this two are cianogenmod roms.

Your car must have a positive or a negative (earth) cable that turn on when ign on, the car needs it. I recommend you a multimeter to check negatives.

Simply way, does your radio/headunit works when ign off? air con? If something only works when ign on, you can start there :) anything just pm me, i can send you my wiring diagram too
[Nexus 7 General] max414:
can i power up two amplifiers ? one for speakers and one for sub ? cx i see is there is only one rca out at the end of the setup ?
[Nexus 7 General] PHiL_G4:
sure you can.. it is the way I do.

you only need a y-cable after your dac oder 3,5mm audio output

phil
[Nexus 7 General] mika91:
Hi,

Thanks for your post and feedbacks.

I'm considering using a nexus 7 as my car head-unit, but have some doubts about phone features.

Is it possible to connect my smartphone to the N7 with bluetooth, and make/reveice calls on the nexus? (as an a2dp car radio would do)
[Nexus 7 General] max414:
Hey wanted to ask again ..if I get the 2 ampere cigarette lighter for my car ..would that be more practical as a power source ? Or should I just try to attach nexus own charger (that came with nexus ..) with battery of car ?? I cnt understand sorry
[Nexus 7 General] ryanjv:
what's the best DVB tuner dongle to use? i'm having some battery drain issues, so i want to use less tethering and cut out Tune In radio, but need to replace it with terrestrial

this was my shopping list for my build in my 2004 Mazda 3. it's not hard to google around. I just searched more or less for his list on ebay.com and amazon.com

Nexus 7 (running Timur USB Rom)

Metra Harness 70-7903 $4.98

Metra Double DIN 95-7504 $16.50

Hardcase $4.99

USB to 3.5mm 5V DC Cable $1.85

DC Buck Converter with USB Out $6.99

OTG Y Cable $4.00

Logitech USB Hub (I think I paid $5 about 7 years ago on a deal site)

Joycon EXR $42.00

Behringer UCA222 USB DAC $29.99

OBDII ELM327 Bluetooth Diagnostic Tool 16.99

^These you have to be careful for. I bought three for my dad and I and they all worked perfectly, my roommate bought one from another seller and it was a dud. The circuit board looked different and the sticker was upside down

Lexan 12x12x1/4 $9.99

Neodymium Magnet $1.30

Sound Storm Laboratories F4 400 amp $36.44

BOSS Wire Install Kit $16.27

RCA Cables (free, laying around the house)

TOTAL $192.29

only thing extra i picked up are some ferrite cores to help with some noise (should arrive tomorrow) and some RCA splitters ($4.99) to use all four channels on my amp http://www.ebay.com/itm/290924674650?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
[Nexus 7 General] anurag09:
hi i am using just the basic installation of USB rom with Timur Kernel in fixed installetion mode. I have just connected a pen drive as for now. my problem is i am facing battery darin overnight what to do for that? can you please help me??? Also i would like to ask how to keep screen on till the time car is running its getting switched off after that i dont know how to start it. i switch off may car and then tablet starts. its verry annoying and one more question is it nescessary to use Tasker?? hoping for a quick reply

thanks in advance.
[Nexus 7 General] ryanjv:
you don't need tasker if you dont' need anything fancy. With putting it in fixed install mode, the tablet turns on when i turn the car on, and turns off airplane mode. When you turn the car off, google play stops playing music, airplane mode turns on, and the tablet goes into deep sleep standup. outside of that, the only thing i need tasker for is to make google play automatically start playing music when the tablet gets power. The screen never turns off while the cars running and the tablet has power.

I've also got a drain while charging. Others have suggested a thicker gauge OTG Y cable, but no one lists the size of them. I may just have to take a stab at it
[Nexus 7 General] dilldoe:
anyone tried this rearcam app?

https://github.com/openxc/rearview-camera

it's actually 2 apps in one. there's a odb2 monitoring app that detects if rear gear is selected and then opens up the cam app. (I assume it closes the app once its out of rear gear)
[Nexus 7 General] Mugga:
Does anyone of you guys got the dvb-t modules for the last version of timurs rom? Because I can't get dvbt working with it.
[Nexus 7 General] anurag09:
plz help urgent

hi i am faceing a problem ... while playing music from apollo if i close the app the volume automatically increases to its maximum same thing happens if i tap pause/play icons on navbar in quick succession ... it has led tisome serious issues while driving (when m trying to change the song or trying to pause it next time i hit play suddenly speakers are on top of their limit it has startelled me a lot of time) any sollutions. i also feel the hight of nav should be more for the ease of access. any solutions??? :confused:
[Nexus 7 General] PHiL_G4:
Hi, alternatively go into the dev options and activate "stay active on power" or something like that.

Hi, I am also in tablet mode, no draining Problems here. I have a cheap angled OTG Cable from DELOCK and another Y-Kabel from the same manufactory. See first post.

Hi, no sorry dude

Hey, sorry, but if you are still searching for I can build some early december. not much time atm :)

Hi, I habe some of this curious problems too. I am using Poweramp licensed. When I tab louder (+) button, sometimes volume jumps immediately to 100% :-o

regards, phil
[Nexus 7 General] caunyd:
Hi Phil. Thank you for your great contribution to the forum!

I plan to have the following in my system: Nexus 7, DAC, Directed DMHD1000I Radio Tuner, and iPhone 5S. I want to be able to use the Directed Radio tuner to listen to FM radio, and I want to be able to connect my iPhone so that I can play songs on my iphone through the N7.

This is how I plan to power everything:

ignition ---> relay ---> 12V-5V converter with female USB connector ---> USB Hub ---> Nexus 7, DAC, Directed radio tuner, and iphone

Do you think your USB hub ( http://www.amazon.de/DELOCK-USB2-0-Port-ext-Kabel/dp/B003O3B98W ) will be able to power the N7, DAC, Directed Radio Tuner, and the iphone? And will they all connect to each other so that the N7 can recognized the DAC, iphone, and radio tuner? Thanks again!
[Nexus 7 General] PHiL_G4:
Hi caunyd, I dont think that the directed radio tuner can be powered over the usb hub.

I studied the manual.. you need 12V (e.g. from the relay).

Do you have an amplifier?

In my opinion it should look like this:

ign ==> relay ==>

-->12V-5V StepDown converter (min 3A) --> y-usb-cable --> USB Hub --> DAC, iPhone (Mass Storage Mode), OTG cable --> Nexus 7

--> Directed Tuner

==> amplifier ==> Speakers

You have to think about wire the DAC (Nexus audio) and the directed tuner to your amplifier?!

They both have to be connected to the amp. The Nexus 7 has no audio input to manage the FM Tuner and work like a Headunit.

regards, phil
[Nexus 7 General] caunyd:
Thanks for the reply Phil. Why do I need a y-usb-cable? What would plug into the 3 ports of the y-usb-cable? 1 port would be for the power from the ignition, right? The 2nd port would be for the USB hub? What would plug into the last port of the y-usb-cable, the Nexus 7?

Does the Nexus need to be on a completely separate end of the y-usb-cable? Because I was planning on just plugging the Nexus 7 into the USB Hub along with the iphone, DAC, and Directed Tuner; and therefore I wouldn't need a y-usb-cable. From the ignition and then the relay and then the 12-5V step down converter, I could just plug in a USB Hub and connect everything, including the Nexus onto the hub.

If a y-usb-cable is needed, can you recommend one? I tried this Y cable and it didn't work

http://www.ebay.com/itm/131021083153?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

To test it, I plugged the Y cable into my computer (for power), the Nexus 7, and my iPhone. The Nexus 7 did charge, but the iPhone was not recognized and did not charge. But maybe this occurred because I haven't installed Timur's ROM/kernel onto the Nexus 7 yet.
[Nexus 7 General] dB Zac:
Yes, you need the custom kernel 1st
[Nexus 7 General] Krulm:
Ok, strangely enough I have installed Timur's fixed install Kernel yet my tablet doesn't do anything like that on it's own. I use Tasker to detect power and wake/sleep. USB-DAC and DVB tuner works but flash drive is a no go. I'm also trying to get Noozxoide to work and not having any luck with that either. Starting to wonder if I missed something here...
[Nexus 7 General] ryanjv:
I think you have to enable fixed install mode to enable the auto deep sleep/airplane mode. The only thing I need Tasker for is auto play music. Unless maybe you need to set tablet mode as well
[Nexus 7 General] cristee:
Hello. I want to do the same thing with a nexus 7 but my worry is the temperature in the car during summer and winter. i'm afraid the baterry and the display would not take well the extreme temperature.

I was thinking taking off the baterry but still don't know how the rest of the tablet will function on those conditions.
[Nexus 7 General] ryanjv:
One thing that you can do is make it easily removable. My faceplate unclipped and I can pop out the tablet in seconds. Just have to unplug the other cable.

How cold is cold? I'm in East Detroit and when it snowed last week I left it out and I think I only lost about 5 of 10%.it wasn't a big deal because I pulled it out to use at work. But with a good enough power supply people say it charges right back up.
[Nexus 7 General] cristee:
I live in Romania (Craiova) where is not the coldest region in my country, but in the winter, temp go low as (-20 C / -4F) and summer ( 40 C / 104F). The summer is more problematic . I belive the in car temp whould go over 60 C / 140 F
[Nexus 7 General] gregthomas129:
First of all, thanks for this guide! Yours and the others you have listed have helped me out tremendously in my own install in my 2007 Mustang GT.

I have a couple of issues that maybe someone here can help me with. Im running a UCA202 DAC using rca line level connections to my amplifiers and I'm having a terrible problem with ground loop noise. Im using a ground loop isolater between the dac and the amps and this helps but there is still some noise. I think the problem is related to the fact that the tablet/dac are not grounded to the car chassis. The power supply I'm using is grounded but I'm thinking that since a 12v to 5v converter is just a step down transformer that the chassis ground is not passed to the tablet/dac. Anybody have any suggestions for how to either ground the tablet or get around the ground loop issue? The UCA202 has an optical output on it, maybe this is the answer?

Thanks Greg

My build thread: http://m.mustangforums.com/forum/showthread.php?t=702814
[Nexus 7 General] Krulm:
I used the "DB Link NF105 Reference Noise Filter" on Amazon noise filter and it works well! Sorry, can't post links yet. lol

I'm using the very same DAC btw. Nice work on the install. :good:
[Nexus 7 General] ryanjv:
I've got the uca222 and have the same issue and thoughts. I haven't had time to tinker so I just turned the volume up haha :P
[Nexus 7 General] gregthomas129:
Thanks. I'm using a Scosche (sp?) isolator at the moment and it helps but it seems to be picking up all kinds of interference no matter where I put it. The noise changes when I move it around. I may try a different isolator, this one may just be crappy.

---------- Post added at 02:30 AM ---------- Previous post was at 02:27 AM ----------

I'm gonna do some tinkering tomorrow, I'll let you know how it goes. I've also got a different power supply I'm going to try, I'm curious to know if how it's grounded makes a difference.
[Nexus 7 General] shiznu:
Hi guys nice job on all the installs. A lot of outside the box thinking going on. I've been following this and a few other threads and since there a lot of variables in the results I was hoping to get a couple questions answered. I am planning on doing a non fixed install but would be running Timur's fixed install ROM for the deep sleep feature. This is what I'm not clear on. Can I just use a otg y cable from a CIG lighter provided I can find one with enough amperage? In other words USB otg y cable, micro male end in the nexus a charging cable to the female and my DAC into the normal sized USB. That would be my whole setup nothing fancy just unclear if I would need a powered hub.

Edit: my CIG lighter is switched on/off with the ignition.
[Nexus 7 General] gregthomas129:
Should work fine, you'll need a charger with enough amperage for the tablet and anything plugged into the normal usb port on the otg cable. Fast charge on the tablet draws 1.8 amps and any usb accessories need .5 amps a piece. So in your example a 3 amp charger would do it. You would only need a hub if you plan to attach any other usb accessories such as a flash drive.
[Nexus 7 General] shiznu:
Thank you great explanation. I think I read to many post and confused myself. Also even helps me understand adding more devices later. I appreciate everyone that suffer the trial and error figuring out what it takes to make things work. True show of community.
[Nexus 7 General] _crue_:
Why you dont use onay protection for car battery?

Dont you afraind you will get it totally uncharched?

---------- Post added at 10:19 PM ---------- Previous post was at 10:14 PM ----------

I'm also working on arduino implementation as resistant keys for controling

looking forward to see you solution.
[Nexus 7 General] stops91:
Very very nice, I hope to do that someday in my car.
[Nexus 7 General] gregthomas129:
Most of us are connecting everything through a +12v ignition switched source (turns off with key off) so nothing is powered when the car is off. Car battery shouldn't be a problem connecting it this way. I can't speak for the op though.
[Nexus 7 General] PHiL_G4:
Right, I use a relay which switches on ignition..

No problems with car battery here and also no battery drain problem on my nexus :)
[Nexus 7 General] max414:
I have a problem

Im using timur usb rom

I have stock oem asus 2A wallcharger

Using otg y cable , nexus battery keeps dropping even if haven't connected any usbs

I have enabled fast charging hack so nexus is charging but Still it drops slowly .. I'm confused
[Nexus 7 General] caunyd:
Hi guys. Please forgive the extreme rookie question that I'm about to ask. How do I go about installing Timur's Rom? I downloaded the ROM from his site. It is in zip format. I have WinRaR to extract it, but I don't know what to do at this point. Do I plug in the N7 and then somehow extract the zip file onto the N7? Any detailed instructions would be greatly appreciated. Thanks!
[Nexus 7 General] M1nur:
You are simply flashing a rom. I sounds like you have never done this before. I'd look around here for instructions on flashing a ROM.
[Nexus 7 General] _crue_:
yes )) I know, I'm too, but ..

I remember time ) when I'm stock on the lake (AT transmission) with low battery :)

music played to much time (also forget lights), but if I had some protection, it would help me to avoid such situation :)

I'm just asking, because I will add small controller before DC-DC to keep my battery and time safe :)
[Nexus 7 General] gregthomas129:
Check your battery stats to see whats draining it, you must have an app installed thats zapping your battery.
[Nexus 7 General] xdafoundingmember:
I had to refresh my Rom once because of media server causing a huge drain bigger then screen
[Nexus 7 General] max414:
Anybody ? Please help me too
[Nexus 7 General] gregthomas129:
Did you check your battery stats?
[Nexus 7 General] xdafoundingmember:
Get a powered usb hub
[Nexus 7 General] caunyd:
Hi guys, I would like to play music and podcasts from my iPhone through the Nexus 7. Can I do this with Timur's ROM as is? Or do I need to install an app for this? Thanks.
[Nexus 7 General] xdafoundingmember:
IPhone and android don't mix
[Nexus 7 General] hunterx82:
I just bought a 2004 Scion xb and plan to get this done....though probably professionally.

Question about it's functionality...is there a way to use your cell phone's bluetooth to talk through your car's speakers, using your nexus 7 as a bluetooth hub? That's not a deal killer, just curious. I have the option in my Altima and really enjoy it, but not in the xB. As for putting local media onto the N7, I don't imagine NFC can sustain too many files so do you just download from the cloud when/if you go on a trip where you'll be without some data service for a while?
[Nexus 7 General] gregthomas129:
1. Bluetooth hands-free... get a Scosche Motormouth II, pair it to your phone, tie the output of the MM 2 back into the line out of your DAC. Use an app called Tablet talk. Tablet talk will pause the music player when a call comes in, call audio from the MM 2 will be played over your car stereo speakers and the mic on the MM 2 will pick up your voice and route it to your phone. Also, Tablet talk will show any SMS messages on your screen and you can reply from your N7.

2.Getting media onto your N7... Get a dropbox account, get an app called dropsync, set up dropsync to download from a music folder on dropbox, drop music into dropbox from your computer, tether your N7 to your phone and dropsync will automatically download your music. OR... hook a usb port extension to your usb hub and mount it somewhere you can get to it. Put any content on your flash drive you want, plug it into your extension and transfer it to your N7.
[Nexus 7 General] dB Zac:
I use a JL clean sweep to switch from the nexus 7 audio to a parrot bluethooth hands free kit when a call comes in. I originally intended to use the parrot unit as a pre amp. But the but the line level outputs created a ton of noise. I used it as a pre amp via bluethooth from the nexus 7 but again, audio quality suffered. The clean sweep has been the best sounding solution so far
[Nexus 7 General] captainmorgan000:
Good thread!

Do you think you would be able to create a diagram to show how all parts are connected?

That would be good if you good.

thanks
[Nexus 7 General] dB Zac:
Sure but I will not be able to work on it till after New years.... Kinda drunk right now
[Nexus 7 General] max414:
What rear cam solution is best ?

Webcam or usb video grabber

N what components work out of box
[Nexus 7 General] PlayStation:
Sony wi-fi camera lens

Interesting thread. I have installed a Samsung Tab in my car. I had earlier installed a screen for purposes of backup camera and videos through HDD player. Now I have been wondering whether its possible to use the tab as a reversing camera and do away with the second screen. Looks like this is only possible with Nexus 7 because of the custom kernel.

Recently I came across the Sony DSC QX 10 wifi camera lens which I think might just solve my problems as you can use it with any android device and anywhere within the wifi range. http://www.amazon.com/Sony-Smartphone-Attachable-4-45-44-5mm-Lens-Style/dp/B00EVIJX1Y/ref=pd_sim_p_5

I know this would be an overkill and also expensive but one can mount it in such a way that you can always remove it and use it as a camera attachment to take pictures whenever necessary. This would work not just as a reversing camera but probably even as a recorder in front end where you can place it anywhere and control it with the in-dash android tab.....:cool:
[Nexus 7 General] GrandeParade:
Kitkat Car Mode

I will be trying the same thing but as a semi fixed install. I want it to be as integrated as possible when it's attached to my cars dashboard but I also want to be able to just unplug the USB and bring it as a tablet if needed. And as a tablet I want it to run an updated version of Android, so my solution is to try the Kangaroo kernel, which is using a lot of Timurs code, but making it for newer versions of Android. Also it's ROM independent since it's just a kernel. Doesn't have all the nice features of USBROM, but usbhost, fixed install mode, DAC, remarried cam support and fastcharging seems to work already!

Have a look:

http://xdaforums.com/showthread.php?t=2558717
[Nexus 7 General] _crue_:
check my solution :) for Arduino as controller for remote steering wheel controls.

maybe it will suitable for you

Remote steering wheel control based on Arduino + Android Manager App
[Nexus 7 General] skidmaark:
any progress on this?
[Nexus 7 General] sirdoc99:
Thanks for this thread, it helped greatly. Here's my current setup's diagram. Still waiting on a couple more parts but aside from a small ground issue it works perfectly
[Nexus 7 General] GrandeParade:
Is it a 2 amp charger? Is it enough to run the N7 and the hub or are you planning to have the hub externally powered?
[Nexus 7 General] sirdoc99:
It's a 2-port with a shared 4.2 amps. I haven't had an issue powering everything while maintaining a charge.

http://www.amazon.com/gp/product/B0088U4YAG/ref=oh_details_o04_s03_i01?ie=UTF8&psc=1

It's a cheapo Amazon brand 4-port which isn't externally powered but like I said, no issues with charging. I'm considering using one of my spare 1TB 2.5in HDDs for music/movies/tv. That might cause an issue with power but I'll give it a shot when my parts arrive and report back.

http://www.amazon.com/gp/product/B003M0NURK/ref=oh_details_o04_s04_i01?ie=UTF8&psc=1

EDIT: Forgot to mention, the 2-port cig lighter plug is mounted behind the dash. I split the lighter wiring so it looks clean on the center console and you can still use a cig lighter or a plug-in charger which I use to charge my GS3
[Nexus 7 General] GrandeParade:
Nice! So you have a cable coming out of the dash to the N7 or do you use a dash mounted female USB? Where is your hub located? Glove box?

What app do you run for the backup camera and does it auto launch when you go in reverse?
[Nexus 7 General] sirdoc99:
The N7 is 'hard-mounted'

I could pull the trim off fairly quickly but it's neatly mounted in there for day-to-day use. Everything is mounted right behind the N7, removing the head unit and storage pocket leaves a ton of space :)

I'm using "simplewebcam" for the backup cam. Once I open it, it displays the rear cam instantly. I can't figure out how to make it open automatically when placing the car into "R" but it still works as is. This both sucks and is kinda ok. It sucks since I still need to press the camera icon when going in reverse and it's kinda ok because (if I can work out a way) I could use it as a dash-cam, skype while driving, ect...

Heres a daytime pic of what i've got so far. Mind the out of focus and the McDonalds bag :)
[Nexus 7 General] GrandeParade:
Wow, cool! Did you try the Carcam app? I think it autostarts when it receives a video signal. And then you hook up your camera to the reverse lights. But if you have a slow starting camera it could be useless.

Do you know if Tasker can take input from an OBD2 adapter? Then you could start the app by having Tasker launch it when the OBD2 adapter says the car is in reverse..
[Nexus 7 General] sirdoc99:
I'm almost positive that Tasker can't launch from an OBD signal but look into it.

The reverse lights idea is a good one though. I could wire the webcam's power to turn on with a relay signal when the lights come on. Then use tasker to load SimpleWebCam upon detection of the camera. I'm just not sure if I can choose the webcam as specifically as a tasker trigger.
[Nexus 7 General] N!KE26:
I have mounted a nexus in my dash pics here but my gps singnal is bad because the nexus is so deep in the dash. Do you have any ideas to make the singnal stronger for the nexus. Thanx

Nice installs from you to!:)
[Nexus 7 General] _crue_:
external gps or SAT :confused:
[Nexus 7 General] N!KE26:
But how to connect, I dont want bluethoot one?
[Nexus 7 General] _crue_:
USB,
[Nexus 7 General] N!KE26:
Sorry im a android noob. So if I buy that and OTG cabel its plug and play? No settings need to be done
[Nexus 7 General] _crue_:
I don't know, you hvae to figure out yourself will it works or not.

probably it will, but I'm not sure will it supported by the kernel or not

and how it will cooperate with a ROM

but this is only one solution, without modding of your tablet