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Thread: Nexus 7 in 2001 A4, fully loaded!

  1. #21
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    Went ahead and took a quick video of the quick removal / install of my Nexus 7 into the dash. It's nice to be able to quickly swap out an entirely-stock Nexus 7
    Last edited by MetalMan1; 09-22-2014 at 02:05 PM.
    Dave One and kabodos like this.

  2. #22
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    Quote Originally Posted by blafrisch View Post
    I used those as well for my Nexus 7 but started having issues as temperatures approached 90 degrees outside; I've now switched to a 100W DC-DC USB that seems to handle the heat far better.
    My regulators have been working fine. My guess is that your N7 simply isn't charging due to temperature; the N7's battery protection circuitry seems to cut charging around 110 deg. F, a temperature which can easily be reached even without direct sunlight on the tablet.
    Last edited by MetalMan1; 07-07-2014 at 01:07 PM.

  3. #23
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    Recently played around with streamlining lock screen security. Here's how it currently functions:
    1) Turn power on, tablet is locked and lockscreen shows (using a rotation app to force lockscreen rotation to landscape)
    2) Tablet Talk begins between phone and N7, and this trips the Tasker profile BT connected (on both phone and tablet)
    3) as soon as Tasker on N7 detects my phone, one of the things it does is set a variable I call %SECURE to 1.
    4) Then a task called "Lockscreen" runs and does the following:
    4a) disable pattern lock and lock with power button
    4b) disable keyguard
    4c) wait 200 ms
    4d) enable keyguard
    5) Then I swipe the lock symbol to enter the tablet. (I have thus far been unable to properly bypass the keyguard without additional issues while using gestures since I disabled the navigation bar)

    6) Turn power off; N7 runs Tasker task to enable lockscreen and lock with power button
    7a) If N7 finishes power-down sequence, then it turns off and lockscreen is enabled
    7b) If I turn power back on before the power-down sequence concludes, then because my N7 is still connected to my phone at this time, it re-runs the "Lockscreen" task to disable lock screen and disable/re-enable keyguard.

    It's function is only semi-complicated and it simply works. I use a similar sort of sequence on my phone when my phone is connected to my home WiFi network.

    Video of it in action!

  4. #24
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    This turned out really nicely.

  5. #25
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    Quote Originally Posted by Creative0Mind View Post
    This turned out really nicely.
    Thank you
    It certainly has its quirks from time-to-time and the backup camera usually doesn't work (only works after a reboot, and stops working after a power cycle), but on the whole I'm pleased with how things turned out.

  6. #26
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    do you get any line noise using the Behringer UCA202? Or, are you using it at this time?

    Thanks,

    reflect23

  7. #27
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    Quote Originally Posted by reflect23 View Post
    do you get any line noise using the Behringer UCA202? Or, are you using it at this time?

    Thanks,

    reflect23
    This is a question without a clear-cut answer.
    In theory a DAC itself will not produce any noise, as it receives a nice clear digital signal and simply converts that to analog.
    However due to potential ground loops, especially in a car where you have other electronics, not to mention DC-DC converters, USB hub(s), amplifiers/etc. that may be at different potential levels, etc. you have plenty of capacity for line noise.

    Originally my car did have noise while using the DAC, but this was with it tied into the stock Bose system... and that was the problem (aside from some minor ground loops). Running dedicated signal lines and aftermarket amplifiers gave me a nearly noise-free audio system. I say "nearly" because I'm using the Behringer's "Monitor" input with a Bluetooth audio receiver (for taking phone calls from my phone) there is a little added noise. But I don't attribute that to the Behringer DAC.

  8. #28
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    Nice! Very clean.

  9. #29
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    Have made some changes lately!

    Earlier this year, a new Android app was released called "EasyCap Viewer". This is an all-inclusive app/system process/driver meant to be used with EasyCap USB video input devices, that doesn't require the kernel have an EasyCap driver built-in.
    It's gotten better since first release, and works A LOT better than the CarCam/kernel-driver solution for use as a backup camera.

    I've been playing with hardware changes:

    1. Audio control console. This is volume control, a "power" button to control Nexus 7's screen on/off, a switch to control the Nexus 7's volume level, and an additional powered USB port. Really tight fit but it fits nonetheless. It sits in a normally-empty cubby next to the E-brake handle.
    2. Arduino upgrades. Upgrading Arduino capabilities. The switches in the above ^^ point will interface to the Arduino. The Arduino will have HID keyboard firmware loaded, so it will act as an input to the Nexus 7.
    3. Digital line-level volume control. Cheap $15 device from eBay, but works quite well. Separated into 2 parts: 1) rotary encoder/circuit board; 2) volume control processor board. Pressing down on the rotary encoder even mutes the audio!
    4. Relocated equalizer to glove compartment. This makes it so the Clarion equalizer's blue lights don't clash with all the red lights in my interior (which are stock, BTW). Also allowed me to put a normal ash tray back into the center console.






  10. #30
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    Looks great!

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