I have had a ton of other setups in the Tacoma, and this one just performs the best for my needs without a doubt. I started with a full Nexus 7 setup, ditching the head unit, and using a small internal amp. This setup failed because I had no Fm Radio, and I could not remove the tablet easily to update and make changes. To counter this I installed back in a head unit into the system, and put the tablet on a mount, however the FM radio felt too disconnected, and the mount I used was too bulky. I felt like I was using either the head unit or the tablet, but not both. I then fell onto the idea of SDR radio. I tried to use this option, but bad feedback and failing drivers made the setup unusable. I then moved onto ditching the tablet and using the Appradio 2, ARLiberator setup, mimicking my phones screen on the head unit. This setup was the worst for me, I had snow issues and could not get a constant feed to the unit, the app failed to connect very often, and keeping the phone charged was near impossible. Overall it was very clunky and not very reliable/usable. All these setups didn't last for over a month and all of their failures led me to this simple elegant solution:
I now use a nexus 7 with Timurs USB Rom, and a Sony MEX-BT4100P head unit. I use the Sony app remote to control the head unit from the tablet. USB Rom does a great job of controlling start up and shutdown of the tablet. I lose about 2-3% battery life over night and I recover that within about 10 minutes of driving (this is with all connections and screen at full brightness). The radio connects to the tablet and phone simultaneously. All audio from the tablet is streamed over the bluetooth connection to the head unit. Also, by using the media bluetooth connection this allowed me to control the tablet with the steering wheel controls (SWC-->head unit-->tablet). This setup is reliable, practical, and safe and I am very happy with it.
Link to Timur's USB Rom
Sony App Remote
Install progress from start to finish:
First thing I did was install the 5 volt 10 amp power supply underneath the drink holders along with a relay for it to turn on when the car turns on. 12 volt input comes straight from the battery into the relay then to the power supply. 5 volt output from the power supply goes to fuse distribution block and then up to the tablet. I used the head unit on signal to control the relay. At the top of the picture is the master on off switch I put in for the power supply. The switch is a 3 way rocker allowing me to keep it in a full off position, a position where it turns on the relay based on ignition, and a position where it keeps the system always on weather the car is on or off.
Next I modded the Nexus a bit. I got rid of the speakers on the tablet and bent up the USB so that it would poke out the speaker grill. I put some glue on the USB to keep it pointed up rigidly. I did all this to make the final install look more simplistic. By keeping the connection out of the back, the tablet almost appears floating and no bulky docks or wires are seen at all.
I also attached an old mount face to the tablet using rivets. I used rivets because it hardly intrudes into the internals of the tablet allowing me to put the back cover back on without a hitch. On top of the old mount face I attached a ram mount ball pivot. I purposefully made the head unit removable and purposefully made it in the position that it is in. Being just off to the right of my steering wheel and right at gauge level makes the tablet very easy to use. I am not reaching over uncomfortably trying to get to the unit (like I so often did when in my previous setups that had the nexus directly in place of the head unit). Also it is in a very safe position to quickly look at the unit and gain information. By having the steering wheel buttons hooked up, I hardly even have to touch the tablet anymore allowing me to keep my hands on the wheel most of the time.
Next I modded an old single din I had. I gutted it, and then installed a usb hub and a switch for the tablet. I have since gotten rid of the hub since I didnt need it. I added some quick connects to the power feeds so I can pull it in and out of the dash with ease.
I created a wooden face plate and attached another ram mount ball. I used standoffs so it would protrude out far enough for me too add an arm to. I put a felt cover over it all to make it look cleaner, then attached it to the single din. Then I put the cover back on the single din and bolted it all up
Placed it in the dash and called it a done deal
Neat! I'm doing much the same in my Tacoma, but I built the mount into the front double cupholder. I have a 10.1 Asus VivoTab, and I wanted it down a little bit in the cab. Yes, it makes getting to the AC controls a bit of a stretch, but other than that, I really like it. I have used the BT audio connection to my Kenwood, but more often than not I just connect the 3.5 audio jack. I also gave some thought to power, but I'm just not in the vehicle long enough to ever drain the tablet. The Droid Razr I tether to is the problem child when it comes to battery life, but I figure a 7500mah external battery ought to solve that issue.
Of course, the Vivotab is Win8, so I can run Centrafuse as my standard frontend, and still access any market apps as needed with a swipe.
That's awesome. I thought about utilizing the front cup holder area a lot, seeing as it's so easy to mod with the whole unit being removable. But ultimately I decided I actually use those cup holders a lot so I had to find another way. I was able to bring power into the car very easily using a 10 gauge wire through a vent tube kind of thing. It's right under the glove box against the fire wall. See picture below. So if you are thinking about adding power from the battery, its really is not complicated to do, you could even fit the power inverter under the cup holders just like I did and probably not have to change your setup. You can see the pictures below to see where I brought power in from.
Here's a quick pic of my rig:
BT mic with remote radar detector display in tray below
Asus VivoTab running Win8 Pro (that's a Sirius/XM streaming app running in Centrafuse, not a Sirius/XM hardware radio)
You can see the audio cable on the right side.
Can you guys make phone calls through the tablet?