Here my problem I connected my RCA to my amp I also ran a turn on power line
( 12 v trigger line) for the amp. In the back for the radio I use the only one call
AMP and it will not turn on my amp at all. I tested it with a voltmeter
there is NO power at all when the radio is power on.
So how do you turn it ON?
Problem fix, I used a spare red line from one connector that was not in use. done working.
Related
Hello and thanks in advance
I have looked but cant fine, forum seem so slow over the last few days or is it me?
Search has stopped working completely for me!
I use phonealarm to perform profile changes on my uni
One is when I put in to car holder/charger it rotates the screen for tt6 turns of wifi turns on Bluetooth ect
But my device will not light the screen up when external power is detected unless it can see Active sync I have tried all combinations of settings with no success
So I thought I could use P/A to run a file or program to turn on the back light I just need to know what file. Any ideas appreciated
Thanks again
John
turn back light to on
hello
has no body any thoughts on this
when u say the device won't light up when you plug in your in-car charger means you screen lights up only for a few minutes and off or when immediately you plug-in the charger, the screen light off..??
and your intention is to light up the screen all the way when you're using it in your car...?
back light is off
hello
if the phone is in standby ,and back light off and i plug in the mains charger the back light comes on , if i plug in the usb sync cable the light comes on if i plug in home made charger ( http://forum.xda-developers.com/showthread.php?t=285768&page=2 post 20 ) the light comes on
but if i plug in any 12volt car charger ( and i have tryed lots from 99p one from the local phone shop to brodit moulded one they will not light the screen
all supply 5v +-.1
i just want it power up the screen when the car is started
so i did wonder if its to do with the extra pin in the mini usb cable maybe its earthed
thankx
John...
towinguk said:
hello
but if i plug in any 12volt car charger ( and i have tryed lots from 99p one from the local phone shop to brodit moulded one they will not light the screen
all supply 5v +-.1
John...
Click to expand...
Click to collapse
There was a discussion about this a long time ago. NOT ALL CAR CHARGERS GIVE OUT THE NECESSARY OUTPUT capable of powering and charging the Universal at the same time. That was the conlusion drawn at the end of the thread. That is also the reason why your Universal does not have the backlight ON even though it is plugged in the car charger. You can modify the lenght of time the backlight is ON if you prefer through the registry, but I doubt that it will charge the Universal to FULL capacity. Just search at the Universal Accessories section about car chargers for research. I think that is where I read it some time ago.
since the first post i now have a o2 orbit and its the same on this phone !!!
On my primary car I use a USB adapter to charge the phone. Prior to the SG2 I had a HD2 which (I think) charged fine.
If the phone has a zero charge I plug it in and it will automatically boot and the charge indicator shows charging but the battery indicator does not move for a while. Charging when using the phone never seems to keep up with the charge. After about 5 minutes the top indicator (when phone is on) starts to move and the phone will charge - although it seems pretty slowly.
The weirdness - when I plug in the USB cable to a laptop when its off the battery indicator lights up on the screen (pictagram) showing the phone is charging but it doesn't boot which is correct. What is weird is below:
In the car when you attempt to turn it off the phone with the long power button press and select the right options the phone will close down - you get the TMobile logo then the screen blanks out - then IT REBOOTS on its own!
Could under voltage be doing this? or is the cig port doing something odd with the voltage or amps? Know the USB port works and charges because I can charge it off a laptop, wall charger, computer etc and it works as it should. Its not the cable because I tried it on the computers.
Also tried a different usb/cig adapter - actually three and get the same results. Car only has 1 cig port.
Anyone have an idea?
Hello,
I recently sold my car and no longer have the need for one of these MTCB units. Like an idiot, I forgot to wipe my information from the unit (Eonon / KLD) before uninstalling it.
The unit is made for plug and play with a Mazda 3. Is there something I can do to power it on without the car, so I can erase all of my information / settings and get it ready for resale. Otherwise I'm not going to feel safe selling it. (Even though I could probably revoke the important accounts from the cloud.)
Thanks.
I used a PC power supply.
You need 3 pins Positive and negative for power and positive for ignition power
Look at the adapter wiring specific for your car and you will figure it out.
DRidilla said:
Hello,
I recently sold my car and no longer have the need for one of these MTCB units. Like an idiot, I forgot to wipe my information from the unit (Eonon / KLD) before uninstalling it.
The unit is made for plug and play with a Mazda 3. Is there something I can do to power it on without the car, so I can erase all of my information / settings and get it ready for resale. Otherwise I'm not going to feel safe selling it. (Even though I could probably revoke the important accounts from the cloud.)
Thanks.
Click to expand...
Click to collapse
dazza007 said:
I used a PC power supply.
You need 3 pins Positive and negative for power and positive for ignition power
Look at the adapter wiring specific for your car and you will figure it out.
Click to expand...
Click to collapse
No need to a PC power supply, an AC Adapter 12v - 2a is sufficient.
Cut the end if the connector and make 3 wire ( 2x positive - 1x negative ).
1 positive, 1 negative wire to the power pins "normally the thin pins" to power up the unit
1 positive wire to the ignition wire to start the unit.
I used a PC power supply, the yellow wires are 12V, black are ground. I just put the battery and ignition wires in the yellow wire plug and the ground in a black wire black on a 4-pin Molex connector.
To turn on the power supply, you have to jumper the green wire to a black wire in the 24-pin motherboard connector.
Make sure the power wires can't touch the ground pins. I kept shorting mine out and took me a couple times to figure out what was happening.
I'm like an absolutely moron with wiring so this sounds fun!
I guess hacking up the adapter is better than never selling the unit anyway. Thanks everyone for all the help.
youtube is your friend when it comes to this.. plenty of video's on it..
I have made one up myself from youtube videos
Sent from my K00C using Tapatalk
Hi there everyone,
I have been trying to get my Nexus 7 2013 installed into my car seamlessly without problems since December 2015. I have Timur's Kernel v4 (6.0.1) running on it, and it was working flawlessly.
However, I decided that the no battery mod needed to be done as I just could not leave that battery inside a hot car - way too risky.
So, I did the Kevdav no battery mod - with success.
However, once the battery connection was receiving 5v via a usb car charger the OTG cable connected to the tablet's mini usb port would not wake/suspend the tablet properly. It would wake it up, but once it was awake the little battery icon at the top would forever show that it was 'charging' and once power was cut to the otg y cable / mini usb, it would not suspend (would still show as charging).
I did research, and bought a Drok DC-DC step down converter. I lowered the voltage to the battery mod connection to 3.7v (and tested up to 4.7v) and this alleviated the problem of suspend/wake. I think since the original battery gave out less voltage then the otg/charging connection, this needed to be replicated in order for the otg to work.
However, I now have a new problem that I cannot seem to fix. This problem only seems to happen in the car and does not occur when testing it in the house using normal wall chargers.
For clarity, this is how everything is wired up in the car.
Nexus 7 battery mod side of things:
Nexus 7 battery terminals > 22awg usb cable > drok dc dc step down power supply (this board has a female usb port for output) set at 3.7v (tested up to 4.7v) > input is connected to car's constant 12v connected directly to battery on a fused wire.
Nexus 7 mini usb port side of things:
Nexus 7 mini usb port > usb otg y cable > mini usb cable > 2.4a usb car cig adapter hardwired to car's switched 12v accessory wire.
The link to the drok dc dc step down is this - https://www.amazon.co.uk/dp/B01FDBY66Y/ref=twister_B01GO268W6?_encoding=UTF8&psc=1
I turn on acc ignition to send power to the otg connection. It'll power up. However, if left in standby overnight the tablet won't power up. If I physically press the tablet's power button it'll wake up, show the wake up animation, and react as normal (including any subsequent power downs). However, if I don't press the power button and I turn off the ign again, an icon on my car's instrument cluster will be faintly illuminated - this is odd behaviour and should be completely out. When this is the case, if I get out and try to lock the car the remote central locking doesn't work.
This light will go out if I physically disconnect the otg y cable from the tablet, and low and behold the remote central locking works.
I'm no expert on electronics and such, but it seems to me that power may be flooding back into the OTG connection from the no battery mod power?
Does this make sense? Sorry for the long question, but I was wondering if anyone had any experience with troubleshooting or any advice? I've this one problem and then I'm set but I just can't seem to figure anything out and need someone's advice who is in the know rather than take wild stabs in the dark using my own logic because if I do the latter, not only will I waste money on needless components but I'll more than likely break something. I've read stuff about diodes or something in order to regulate power flow but I'm not even sure I'm using the correct terminology here so if anyone can tell me I'm onto something here or I'm talking complete nonsense then anything is appreciated!
I did search these forums and google but I really cannot find anything that is similar to my problem.
Thanks for any input guys, whether it be any tips on what I'm missing or what I need to change (software or hardware, electrical, etc) - it's all very much appreciated.
Antony
Edit: so sorry I think I posted this is the wrong n7 2013 sub section. I can't delete the post but if a mod could please kindly move it to the relevant forum I'd appreciate it. Thanks!
antc101 said:
it seems to me that power may be flooding back into the OTG connection from the no battery mod power?
Click to expand...
Click to collapse
Hi, indeed, and your "2.4a usb car cig adapter hardwired to car's switched 12v accessory wire" requires a small mod to prevent the power feedback. It needs an extra 1A+ diode connected directly to 12V input. You could modify the adapter's PCB or simply replace the fuse's internal wire with a diode where its cathode goes to the spring and its anode to 12V input. Or just place the diode somewhere along the adapter's hardwire. $0.16 1N4001 is good enough ([email protected] is OK for [email protected]).
Not sure if thread is still active but I also have the same symptom with tablet turning off completely overnight. I am running constant 12v to 3.7v dc to dc on battery input and car adapter 12v to 5v on microusb cable in. Tablet will work fine with on and off but after car is shutdown for the night it will not turn on in the morning. It shows me battery charge icon only. I dont have diode installed either. Not sure if thats the cause. Anyone know why it would completly shutdown overnight?
Neo2020Marz said:
Not sure if thread is still active but I also have the same symptom with tablet turning off completely overnight. I am running constant 12v to 3.7v dc to dc on battery input and car adapter 12v to 5v on microusb cable in. Tablet will work fine with on and off but after car is shutdown for the night it will not turn on in the morning. It shows me battery charge icon only. I dont have diode installed either. Not sure if thats the cause. Anyone know why it would completly shutdown overnight?
Click to expand...
Click to collapse
Hi there,
Been a while since I posted on this thread but just wanted to update on what I have done so far.
Since my last post, I don't have any issues. I placed a diode as mentioned above on the +12v for the accessory power. This seemed to have fixed any back flow of power.
Concerning the power off over night, I'm pretty sure this was something to do with Timur's kernel. I forever had issues with that thing - eg, suspect and wake issues, accessories connected to my usb hub..
I switched to a stock version of android 6.0.1 - MOB30X if memory serves... and installed Elemental X version 5.16. No issues with this setup what so ever.
Huh.
I run my Nexus 7 on my car with the battery, mounted just above the dashboard, with direct sunlight exposition and no UV film on the windshield. It's been a whole year without issues, thank God.
https://i.imgur.com/cPNhDDc.jpg
I live in the Northeast of Brazil, where's 30C to 40C through the year. Sometimes I come up to the car and the tablet shut off due to the heat.
Battery still lasts wonders and there's no signs of damage.. yet.
Is it really adamant to remove the battery, or is it just a precautionary measure?
GTMoraes said:
Huh.
I run my Nexus 7 on my car with the battery, mounted just above the dashboard, with direct sunlight exposition and no UV film on the windshield. It's been a whole year without issues, thank God.
https://i.imgur.com/cPNhDDc.jpg
I live in the Northeast of Brazil, where's 30C to 40C through the year. Sometimes I come up to the car and the tablet shut off due to the heat.
Battery still lasts wonders and there's no signs of damage.. yet.
Is it really adamant to remove the battery, or is it just a precautionary measure?
Click to expand...
Click to collapse
You better have more luck.
My nexus was put under the dash and was fine for around 3 years. And it became expanded in just 2 days, separating the screen and the case. So I have urgently remove the battery.
A few years ago, I installed a Verizon Samsung Tab 2 in the dash of my Cadillac. I have this tied into the sound system and use it mostly for streaming music and google maps. I had it set up so that the power (cigarette adapter) would shut off whenever the car turned off. Then I used the Tasker app to detect when the tablet was not getting power and put the tablet into Airplane mode, turn the screen off, and pause any music. This would cause it to conserve enough power that it could last a long time until I started the car again. (I cannot reach the tablet's power button once it's installed in the dash). This worked fine for years. However, this tablet was so slow due to no OS updates ever that I couldn't stand it any longer.
I recently decided to upgrade to the Verizon Asus Zenpad Z8. The issue I am now having is that no matter what I do, the tablet dies when the car is sitting. I cannot keep up with its power demands. Tasker does not have the options available to put it into airplane mode. But I have gone into the developer mode menu and set it so that the screen goes off whenever the tablet is not receiving power and it goes into super saving mode during the night. It still dies. It cannot get enough power from the cigarette adaptor to charge it fast enough to recharge what it has lost when it was parked. I have upgraded to the fastest cigarette charger I could find (3A). The battery life barely moves while the car is on, it charges soooo slowly. But the battery drains very quickly when off. This means that every time I get in the car, the tablet is off and I have to pop the panels off the dash to turn it back on.
I recently tried to use a small power inverter (powered from the cigarette adapter). This caused a massive feedback loop that was unbearable (and not fixed by an inline noise filter). I then tried a true sin wave inverter, same result. Although this did solve the power problem, it charged fast enough that there would be enough battery life that the car could sit overnight and not completely die.
I had to go back to the cig adapter. This tablet is thus far, un-rootable. That limits my options with shuttings things down and limits the features available in Tasker.
If I switch the cig adapter to power the tablet all the time, then I don't have a way to tell the tablet when to shut the screen down (so that people walking by don't see a tablet in my car and break in). I'd like some way for the tablet to know when the car is off so that it can shut things down. The easiest way to do that was by making the cig lighter turn off when the car turns off.
If anyone has any other ideas, I'm open to about anything at this point. This is getting really frustrating. Thanks.
I bought this tablet because my whole family has USB-C devices. No more stupid micro USB what an abortion that connector was. At any rate at first we used USB-A to USB-C adapter cables with USB-A charging devices. I noticed right away that most of my chargers would overheat quickly or simply charge quite slowly...the charger could not keep up with the demand if you were trying to stream video to the phone or whatever. Then I bought Google Pixel phones for me and my wife and noticed that the supplied charger has a USB-C port on it and the supplied charging cable is USB-C to USB-C. These Google supplied chargers would completely charge a dead pixel phone in 20 minutes. After reviewing the USB-C standard on Wikipedia I noticed a much higher ampacity available using USB-C to USB-C devices. So for my car I bought an LM317T integrated circuit and with a resistor and a heat sink I cobbled a little 3.5 amp 5v charging port in my dash. You could also use an LM7805 if you wanted and insert a small value resistor on the ground reference if you really want the extra .5 volts. Make sure and attach the ic to a small heat sink with heatsink compound. You will need to solder your female port to a female USB-C and use a USB-C to USB-C cable as the USB-A connector on the Asus supplied cable cannot pass enough current.
ninasmith said:
I recently decided to upgrade to the Verizon Asus Zenpad Z8. The issue I am now having is that no matter what I do, the tablet dies when the car is sitting. I cannot keep up with its power demands. Tasker does not have the options available to put it into airplane mode. But I have gone into the developer mode menu and set it so that the screen goes off whenever the tablet is not receiving power and it goes into super saving mode during the night. It still dies. It cannot get enough power from the cigarette adaptor to charge it fast enough to recharge what it has lost when it was parked. I have upgraded to the fastest cigarette charger I could find (3A). The battery life barely moves while the car is on, it charges soooo slowly. But the battery drains very quickly when off. This means that every time I get in the car, the tablet is off and I have to pop the panels off the dash to turn it back on.
I had to go back to the cig adapter. This tablet is thus far, un-rootable. That limits my options with shuttings things down and limits the features available in Tasker.
If I switch the cig adapter to power the tablet all the time, then I don't have a way to tell the tablet when to shut the screen down (so that people walking by don't see a tablet in my car and break in). I'd like some way for the tablet to know when the car is off so that it can shut things down. The easiest way to do that was by making the cig lighter turn off when the car turns off.
If anyone has any other ideas, I'm open to about anything at this point. This is getting really frustrating. Thanks.
Click to expand...
Click to collapse
Here's something you can try:
Use a different signal to trigger sleep mode, like WiFI. You could use a cheap 3G router and have the tablet connect to it via WiFi. When you exit the car take the router with you = no WiFi = tablet goes to sleep.