Outstanding work man

 

What wire or where did you hardwire this to?

I have my gps hardwired to the red power wire from the head unit wiring harness, however, when I turn on the car ,during the ignition phase, the screen stutters on and off because the power is being cut out as the car is turning on...
So I'm looking for elsewhere to hardwire it to that will only turn on when the key is set to ignition but won't cut power during ignition start up. My dash cam is currently wired to the fuse box, for the SES light, which stays on during the ignition phase, so no stuttering, but not sure if I should hardwire the navigation to it as well...

 

^^ External amplifiers typically have a power-on delay built-in to avoid popping the speakers when turning on the system. It sounds as though that is causing the problem you are experiencing.

To correct your problem, simple tap into an IGN switched power line (it will be a red wire) before it goes to the H/U harness.

--Spike

 

Hey Spike, that's actually how I have it set up. I hooked the gps unit's car adapter to a female cigarette adapter and hooked up the power wire to the red wire on the head unit's harness

 

Spike100 mentioned the exact way I tapped into the ignition, using the red switched 12v ignition wire. I used it to wire in a second cigarette charger port under the dash (I hate visible wires). Seems you done something similar. Another option maybe to use a relay. This would primarily involve the constant 12v yellow wire for power, a ground and, a trigger wire that is only active when the ignition is on. Though this seems like a round-a-bout way of accomplishing what the red switched ignition wire already does. Its just a suggestion that may help. Sorry for the late response.

 

Well shoot… I was hoping that would be your fix. You have done everything correctly (using the device’s power plug to properly step down from 12 volts, powered off an IGN switched wire, etc.).

You describe a situation that I think needs correction since it could damage your device. I wonder if there isn’t a problem with the device itself, its step-down converter, or the power wire. It could be a simple as a bad ground or power connection on that add-on female socket connector; or the female connector is faulty..

If all of the above fails to show a problem, you will need to bench test the device. I use a 12v converter to bench test my devices before installation. It would be helpful to test the device and its converter if that’s possible.

--Spike

 

yep, mine done finally




It was hard to get the right shape






All parts ready...




Two parts on the bottom are used for construction under nexus, so I wrapped it only for surface protect.




I bought ESP(TCS in US version) button, after wrapping I use it as Nexus power button. Between heated seat switches it fit perfectly.







now, I must change a radio unit but this in future..


@sincere85: Thanks for inspiration

 

Pawel, the install looks great. I'm glad to see others using this option. And yes the surround shape does take a little time to get right. I would like to get more info on how you wired up the external power button? The main reason I designed my mount with a magnetic plate was to get access to the power button if necessary. Is it extended via the micro usb port?

 

It's simple, I connect wires to power button pins. This is Nexus 7 2013, if you have older version probably it's a bit different

 

Slight hijack. I sold my old nexus 7 (2012) and have the asus case if anyone wants it. Just pay shipping. First to PM gets it.

 

What all did you measure and use to make the frame for it? Also how did you keep the tablet stable and secure?

 

I made the mount bracket & frame somewhat simultaneously. But the bracket position & angle dictated the frame surround. I then did a mock up of the frame out of cardboard. Mostly everything is made of mdf. Its very secure, I went a little overboard on the bracket because my coilovers are set fairly stiff. I'll see if I can find some pics. Sorry, I've been away for a while.

 

Also, very detailed information is coming soon. My engineering design professor is allowing me to use this as my final project. So, a improved design, 3D models, specs, and parts list of everything will be included. If all goes well, I may be able to get the frame surround 3D printed.

I will also be looking into the requirements to get multiple units produced. Thanks for the interest.

 

I'm doing my homework too. I hope I can finish by this month or december.

thanks for sharing!

 

Very clean install, I'm thinking about doing this very soon to monitor my gauges through my haltech..

 

Bro.. can u get at me over private message and tell me exactly what you did to get power cycles like this? I don't need spoon fed as I'm good w this stuff too...but id like to hear the basics of your wiring before I buy this gear.. thanks a TON!

 

haevnt heard from the OP, but i also bought a 2nd gen Nexus and the software as lsited above.. is anyone on this thread still actively that i can contact w questions as i build my tabelt in?
I just upgraded to 10 gig and mobiel hotspot on my cell so this should be cool.

 

Sorry bro, I've been out of town and not active on the site. For the on/off function, I used the automagic app. This could be done with the tasker app also. I used the tablet sensing power as the trigger, then listed the functions I wanted it to do from there. Like turn on screen, connect to phone, etc. For the off function, I used the same trigger but have it cut all wireless communication, airplane mode and turn the screen off. This makes more sense inside the app. I take a screen shot of the schematic when I get home tonight.

 

zero appology necc my man.. i saw your activity stats and figured you were a goner.

do you leave the tablet in standby all the time then i assume?
You can actually send your flows right from the app ( export by message.) i PMd you my emaiul too.. thanks a million man!

 

Yeah, I leave it in standby. I tested it going completely off and didn't like how long it took to boot up. Plus, it only comes on from completely off if you root it and program it from the computer. Apps don't run when it's off. I've left it in Standby for weeks and only loss 20-25% of the tablets battery.