I gutted the nook and took measurements for its screen size against the opening of a double-DIN cavity for car stereos and height-wise it is perfect, but width, it falls a bit short. Went with it anyway, resoldered the home key to lead wires to a button on the face plate and covered up the spacing with some black plastic matching the housing. Works great! Power and volume buttons are also relocated. I'll keep the volume buttons as volume buttons until I get an external pre-amp with a volume potentiometer, see below. Once I get that set up, I'll re-map the volume buttons to back and menu for ease of navigation without button savior.
Heres the hiccup I had... I was planning on running the headphone jack output straight to the amp, turns out that was too quiet.. upon gutting the nook I realized that the speaker isnt soldered to the board, and only makes contact by springs. The speaker contact pads? Pre-amped, but outputs both channels through one output as opposed to headphone stereo.. For now, it sits as the pre-amped speaker output to amp and speakers, but I will be looking somewhere for a decent headphone/small preamp to run stereo to all 4 channels of my handy-dandy Sure 4x100w class D mini amp.
It has some serious volume for a 5x5" pcb with a heatsink! Running on a 19v 130w laptop charger off of a 12v inverter, I am able to get pretty good sound out of it. Because the power supply is a bit lacking, its nowhere near max quality/volume. Just loud enough to start to rumble the doors. I'd like to find a 12v to 32v 10a step up but I've not been able to find one.. Tried to wire a 12v to 5v dc step down converter to the nook's battery terminal but it failed to see it. Not sure of the wiring involved in there for detecting battery charge and voltage, but the battery has 5 wires. If anyone knows how I can wire this to run off of a 12v to 5v 1a USB charger, thatd be awesome...
So nook's speaker output -> amp input -> 4 speaker channels, one to each of the 4 speakers that I have in the car. Added two additional speakers in the rear pillar covers, in addition to the stock 2 in the doors. Swapped the stock ones for Polk 6.5" 100w speakers.
I didnt take too many pictures along the way but everything is so exposed you can see how all the wires are ran throughout the setup. I also added a headphone input to the RCA jacks so you can plug in a different player to the front of the unit straight to the amp but again, it wont be pre-amped. Works fine enough as is for phone conversations which is all I really plan on using it for anyway.
Heres pics of what I have as of now. I'll be either stencil spray painting or putting decals on to mark what the buttons do. Future volume potentiometer will go up top right. I'll put on a fancier aux bezel as well to clean that look up a bit.
What I'm really curious about is if anyone knows an app that lets the nook receive audio from another device, and if I can control that device through the nook, essentially allowing me to run pandora or internet radio on my phone, and have it transmit to the nook. That's probably a far fetched app and very specific but I'd like to know if anyone knows of anything that they use for other purposes that may suit this.
Any input would be awesome. Again, I'm not going for pristine audio quality, just more functionality. It already sounds better than my stock radio and it adds way more functionality than stock as well. If you have any cool app suggestions for in car use, that'd be awesome too. (planning on running torque pro on it too, should be awesome for data logging and whatever else it can do... I'll let you know.)