Yes, yes, I wasn't paying attention and managed to plug the live power supply into the MOJO's headphone port. And quite easily, I must add.
For peace of mind: could someone more technically inclined tell me if I (potentially) damaged anything? Everything appears to still be working, and I assume the dc connector wouldn't be able to complete a circuit in the headphone port, but if anyone knows for sure, let me know.
Unless you really rammed that in there you're fine dude
sndwv said:
Yes, yes, I wasn't paying attention and managed to plug the live power supply into the MOJO's headphone port. And quite easily, I must add.
For peace of mind: could someone more technically inclined tell me if I (potentially) damaged anything? Everything appears to still be working, and I assume the dc connector wouldn't be able to complete a circuit in the headphone port, but if anyone knows for sure, let me know.
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Click to collapse
Hi,
One of the first things I noticed after getting the mojo!
And I've done it a few times, A bit of a design flaw IMO.
But there's no danger at all (I'm no elec. engineer tho).
The mojo's power plug has a shielded female positive , and the stereo jack has no pin so there's zero chance of a short.
Related
i have an incredible, also have an incredible idea...
the most annoying thing about listening to music in the car with any phone is the buzz I hear when it's plugged in. is there any way to stop this from happening?
My idea is a plug that sits in the car cigarette lighter port that you plug your car charger into. Inside of the plug is a small li-ion battery that is charged by the car, and charges the phone...
This way when the car revs up it doesn't produce all that noise thru your speakers and ruin your"incredible" music experience.
Anyone think this is a good idea, you think it could work? Obviously there are a few ways to use this idea separate from the one i described... Is there anything like this available?
generic.imitation said:
i have an incredible, also have an incredible idea...
the most annoying thing about listening to music in the car with any phone is the buzz I hear when it's plugged in. is there any way to stop this from happening?
My idea is a plug that sits in the car cigarette lighter port that you plug your car charger into. Inside of the plug is a small li-ion battery that is charged by the car, and charges the phone...
This way when the car revs up it doesn't produce all that noise thru your speakers and ruin your"incredible" music experience.
Anyone think this is a good idea, you think it could work? Obviously there are a few ways to use this idea separate from the one i described... Is there anything like this available?
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Click to collapse
Great Idea, though there are some cheap solutions for this already. The humming is usually caused due to different grounds.
You need to try a ground loop isolator..You can get them at radio shack for $12 bucks or so.
http://www.amazon.com/GROUND-LOOP-ISOLATOR-3-5-APPLICATIONS/dp/B001EAQTRI
kntdookoo said:
Great Idea, though there are some cheap solutions for this already. The humming is usually caused due to different grounds.
You need to try a ground loop isolator..You can get them at radio shack for $12 bucks or so.
http://www.amazon.com/GROUND-LOOP-ISOLATOR-3-5-APPLICATIONS/dp/B001EAQTRI
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Click to collapse
Thanks a million, this is exactly what I need. I still wonder if my idea will work also tho (and here i thought I was on to something lol)
tell us more about your car stereo situation, because I don't hear any buzzing when using my phone either plugged into the USB port of my Alpine radio, or via BT while plugged into the USB port of the Alpine radio, or charging via the 12v cig adapter...
tell us more about your car stereo situation (and what car we are talking about), because I don't hear any buzzing when using my phone either plugged into the USB port of my Alpine radio, or via BT while plugged into the USB port of the Alpine radio, or charging via the 12v cig adapter... Ground loops can be simply caused by improperly grounded equipment as well. So it's better to fix the bad grounds first, rather than resort to buying more "band-aids"...
seanmcd72 said:
tell us more about your car stereo situation (and what car we are talking about), because I don't hear any buzzing when using my phone either plugged into the USB port of my Alpine radio, or via BT while plugged into the USB port of the Alpine radio, or charging via the 12v cig adapter... Ground loops can be simply caused by improperly grounded equipment as well. So it's better to fix the bad grounds first, rather than resort to buying more "band-aids"...
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Click to collapse
Well, i have an 07 scion tc. Don't have a usb plug for my stereo tho, or bluetooth in the car. I plug it into the line in port inside my center console. I find I get more feedback if I plug it into the front charging port, so I plug it into the power port in the center console also. I can't really have it charge and sit in my car mount tho because the charger line wont stretch far enough. If I could plug it into the front one and play music it would be fine tho.
seanmcd72 said:
tell us more about your car stereo situation (and what car we are talking about), because I don't hear any buzzing when using my phone either plugged into the USB port of my Alpine radio, or via BT while plugged into the USB port of the Alpine radio, or charging via the 12v cig adapter... Ground loops can be simply caused by improperly grounded equipment as well. So it's better to fix the bad grounds first, rather than resort to buying more "band-aids"...
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Click to collapse
Why the double post You can always press EDIT at the bottom of your previous post to add to your post.
Since his car is somewhat new im sure the grounding and electrical system is fine. This maybe his only option. I found in my company's 08 civic the humming is very loud when the DI is charging. Though, on my 07 BMW and wifes highlander I dont hear a thing...I guess different cars produce different results. A ground loop isolator does help in most cases. Even though it is a problem originating of the power source itself, this filter/isolator is worth a try.
Is a ground thang, heres the fix.
Ok I have had this issue with 5 vehicles, 6 phones, and 3 different XM units and found that just touching the ground of the vehicle to the ground of the audio device causes it to buzz, so it is a ground loop issue meaning the cool battery idea will not work. Somthing I did do in the early days that has always worked is to take one of those inverters that plugs into your lighter and puts out 110AC and plug your home adapter into that, isolates and works great. I just happened to have one so thought i would do it. The cool thing is that you do not have to buy somthing new for the car every time you change devices ;-) The other is to go bluetooth, works great.
Sounds like you may need new spark plug wires?
kntdookoo said:
Why the double post You can always press EDIT at the bottom of your previous post to add to your post.
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Click to collapse
Accident? Conspiracy? Who knows??!
generic.imitation said:
Well, i have an 07 scion tc. Don't have a usb plug for my stereo tho, or bluetooth in the car. I plug it into the line in port inside my center console. I find I get more feedback if I plug it into the front charging port, so I plug it into the power port in the center console also. I can't really have it charge and sit in my car mount tho because the charger line wont stretch far enough. If I could plug it into the front one and play music it would be fine tho.
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Click to collapse
So is your stereo stock or have you modified it? (amps, etc. ??)
seanmcd72 said:
So is your stereo stock or have you modified it? (amps, etc. ??)
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Stock.
I will probably get an inverter or that isolator soon, thanks for all the help.
I might have a friend check out my grounds too seeing as most people here are saying that could fix it as well.
never had the issue in any car ive owned
junjlo said:
never had the issue in any car ive owned
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You've not installed many stereos then.
... I've fixed damn alternator whine noises more times than I can remember, that is for sure.
Noise suppression
Have a look at the crutchfield guide on noise suppression. just visit crutchfield.com and seach on noise suppression. I would post a l.ink but am not allowed to ..
generic.imitation said:
Stock.
I will probably get an inverter or that isolator soon, thanks for all the help.
I might have a friend check out my grounds too seeing as most people here are saying that could fix it as well.
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Click to collapse
If it's stock, probably no reason to check any ground issues. I would check the quality of the cable you are using though...
I think it's an alternator whine like Humpa said. I'll look for a fix, maybe i can figure something out. It whines more when I hit the gas, if it is idling then I can't really hear it.
I bought a Nexus One with the infamous broken power button issue, and I am curious what would the effect be if I short the VCC and GND line in the charging port? Has anyone tried that? I am thinking that it will either fry the board or trick the phone to think that it is charging.
The reason I want to do this is because I travel a lot and I might not have access to USB charging if I want to swap the SIM card. I am familiar with the other tricks regarding remapping the trackball_center and I am going to install a version of CWM that doesn't support charging (that way the phone boots when I plug a charging cable).
So long story short... what do you think about attempting to short the micro USB charging/data port?
dcalpha said:
what do you think about attempting to short the micro USB charging/data port?
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Not much.
Unless the unit is in USB host mode there will be no voltage on the Vcc line.
Even in USB host mode it should be current limited and do no damage.
Still, I wouldn't do it.
I don't know why you think that shorting it will do something useful.
Renate NST said:
Not much.
Unless the unit is in USB host mode there will be no voltage on the Vcc line.
Even in USB host mode it should be current limited and do no damage.
Still, I wouldn't do it.
I don't know why you think that shorting it will do something useful.
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Click to collapse
I actually do not know, thus I asked... just trying to think outside the box about a way to trick the phone to think it is charging short of carrying a portable battery charger with me (which can be problematic on carry-on luggage).
Another idea I am thinking about is building a small flex cable using a conductive ink pen that permanently connect to the phone's battery on one side and a cut down male micro-usb on the other side (to slim it down). Such cable would be small enough to fold under the battery cover and allow it to close.
My question is: Will the ~3.7v be enough to get the phone to start charging? and do you foresee any issues with feeding power from the battery right back into the phone's charge port?
dcalpha said:
Another idea I am thinking about is building a small flex cable using a conductive ink pen that permanently connect to the phone's battery on one side and a cut down male micro-usb on the other side (to slim it down). Such cable would be small enough to fold under the battery cover and allow it to close.
My question is: Will the ~3.7v be enough to get the phone to start charging? and do you foresee any issues with feeding power from the battery right back into the phone's charge port?
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Click to collapse
I think 3.7 won't be enough. Coz usb giving ~5V. So phone won't charge at smaller voltage.
Well I finally got my Nexus 7 installed in my car dash.
It is being powered by the 12 volt socket from the pogo pins when the car is on.
I have the 3.5mm jack running to my headunit which is mounted under the seat acting as an amp.
Something strange is that before I connected my ground for the headunit, I plugged in the audio jack from the Nexus, and it turned on the head unit. It seems the 3.5 audio is grounding to the Nexus and turning the headunit on. I am sure this is part of the issue.
Everything sounds great when the car is off, but if I 1. put my lights on, I hear a buzzing, and when I turn the car on,
I get this high pitched squeal that fluctuates which the speed of the engine.
Would a ground loop isolator placed along the 3.5mm line help solve this?
Probably, but a cheap one is going to sound dreadful... fat, loose bass, and rolled off highs. Good audio transformers are expensive (which is what these are), and it will be much cheaper to install an isolated power supply. Google DaqStuff, they have a very good one for about 20 bucks.
Solutions Etcetera said:
Probably, but a cheap one is going to sound dreadful... fat, loose bass, and rolled off highs. Good audio transformers are expensive (which is what these are), and it will be much cheaper to install an isolated power supply. Google DaqStuff, they have a very good one for about 20 bucks.
Click to expand...
Click to collapse
I found the website but I'm not really sure what I am looking at haha.
Would I be installing the power supply for the headunit, the Nexus, or both?
Also, since I've never delved into this before, an isolated power supply, would it run off the batter of the car?
Jeremi1023 said:
I found the website but I'm not really sure what I am looking at haha.
Would I be installing the power supply for the headunit, the Nexus, or both?
Also, since I've never delved into this before, an isolated power supply, would it run off the batter of the car?
Click to expand...
Click to collapse
You want this one... http://www.daqstuff.com/400116_5volt_switching_power_supply.htm
It will power the Nexus via USB, isolating it from your cars electrical ground (you have a loop now between the electrical ground and the ground of the audio connection from the head unit).
BTW, there is one simple mod you'll want to make to this if you want your N7 to draw the full 2amps from the USB port, and that is to bridge pins 2 and 3 of the USB port. This is very easy to do with just a bead of solder over these pins on the underside of the circuit board where the USB jacks are mounted.
Mount someplace where you can connect 12v from your car to it, and run a USB cable from it to your Nexus. I mounted mine underneath my center console.
Solutions Etcetera said:
You want this one... http://www.daqstuff.com/400116_5volt_switching_power_supply.htm
It will power the Nexus via USB, isolating it from your cars electrical ground (you have a loop now between the electrical ground and the ground of the audio connection from the head unit).
BTW, there is one simple mod you'll want to make to this if you want your N7 to draw the full 2amps from the USB port, and that is to bridge pins 2 and 3 of the USB port. This is very easy to do with just a bead of solder over these pins on the underside of the circuit board where the USB jacks are mounted.
Mount someplace where you can connect 12v from your car to it, and run a USB cable from it to your Nexus. I mounted mine underneath my center console.
Click to expand...
Click to collapse
On my Nexus 7, the actual USB port is broken. I don't know what I did to it, but it doesn't do a thing when plugged in.
I have the power coming from the 4 pogo pins on the side of the Nexus. Will this mod still work with using the pins instead of the USB port itself?
What if I don't do the mod, and it doesn't draw the 2 amps, will it still draw enough to charge while in use?
Jeremi1023 said:
On my Nexus 7, the actual USB port is broken. I don't know what I did to it, but it doesn't do a thing when plugged in.
I have the power coming from the 4 pogo pins on the side of the Nexus. Will this mod still work with using the pins instead of the USB port itself?
What if I don't do the mod, and it doesn't draw the 2 amps, will it still draw enough to charge while in use?
Click to expand...
Click to collapse
The unit also has screw terminals for 5vdc out which you can connect directly to the pogo pins. In this case the USB mod is not necessary.
---------- Post added at 11:04 AM ---------- Previous post was at 10:58 AM ----------
BTW the unit is fused on the input AND output sides, and the isolating module will absorb spikes as well. It is well made and will supply your Nexus with the cleanest power possible. It's quite the deal for twenty bones.
Solutions Etcetera said:
The unit also has screw terminals for 5vdc out which you can connect directly to the pogo pins. In this case the USB mod is not necessary.
Click to expand...
Click to collapse
So just to make sure I got this right,
the connectors circled in red would go to the pos and neg of the pogo pins on the Nexus,
and the connectors circled in yellow would go to the power and ground of the vehicle?
This would stop the alternator whine I'm currently hearing?
Yup.
Solutions Etcetera said:
Yup.
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Click to collapse
Well thank you very much!
Glad I could help. I ran into this issue when hooking up a bluetooth receiver in my truck, where things like the door locks would drive it nuts. I was gonna build one but couldn't source the parts for less than this guy offers the thing ready made.
Hi Everyone
I was wondering if anyone had or is currently experiencing loose usb type c connections between the port and the cable. I recently bought the device in November during Black Friday. As my daily driver I started to notice that when plugging in the cable it no longer stay firmly in. Instead it would sometimes pivot left or right. I am RMA my device through Newegg as the RMA passport procedure in Canada with ZTE is complicated.
I would appreciate any and all feedback regarding this. Hopefully no one will experience this later on.
I don't have that problem, though using the USB micro to USB Type-C port seems like its not the best connection (phone will randomly vibrate when using it while plugged in, leaving me to believe it disconnects and connects quick). But that's using the adapter. I have a question though too, do you or anyone else, hear like, electricity/static/spark sounds when unplugging the QuickCharge 3.0 USB type C cable+AC adapter that comes with it? It's my first time using Quickcharge, it hardly seems like it should work that way, but its not exactly something I can Google lol
moccor said:
I have a question though too, do you or anyone else, hear like, electricity/static/spark sounds when unplugging the QuickCharge 3.0 USB type C cable+AC adapter that comes with it? It's my first time using Quickcharge, it hardly seems like it should work that way, but its not exactly something I can Google lol
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Click to collapse
I don't think it should be that way, but I also have this sound. At first I thought it was because of QC3. But I try to charge from my PC usually, and that sound is still there, you can even first unplug USB-A from QC or PC, and only then from phone, but it still sparks. Like something is shortening. Happens all the time when there's charging involved. I have usb-otg and it doesn't do that.
Edit: can confirm that usb-c wiggles, even on my pc motherboard, where I have never used it before. So thats normal I think, but it is still sturdy and won't unplug easily.
Type C male plugs can jiggle so they can put less stress on the female ports.
Also, manufacturers _should_ comply with the exact design reference and always build female ports with the specified measures, so that consumers may opt for a different cable in case of improper fitting.
The sparks sound (a distinguishable crackling noise) while unplugging used to happen on the first month after I bought my unit and after that, it stopped. I think the battery takes some time to stabilize the energy output. Ampere says the charge is normal.
Had this Problem once, try to clean the USB port (Used a Q-Tip and A needle with a thin towel).
Occasionally since I got the phoone I've noticed that the audiobooks I've listened to have suddenly stopped, and prompting me to press play again; it always seemed to happen when I had a hand in my pocket, so I probably just assumed I had touched the screen or something. It was annoying, but I just continued on.
Then late last week after it happened while I was at my desktop and just moving the phone, I investigated a bit more closely.
I found that I could wiggled the headphone USB dongle, and the fit was not as solid as you'd expect (of course, I hadn't really checked this earlier, just putting in and taking out USB connectors up to this point). As I wiggled it, the audio would stop as if my headphones were disconnected and reconnected. Which must've been what had happened before.
Then I checked with my charging cord. Same kind of fit, I could wiggle the connector a few degrees. Enough for me to raise some concern about it being a faulty USB port, or it having somehow gotten loose in the shell.
This is probably RMA worthy, I'm guessing. The question is what will OP do? Replace the whole phone? Repair it (repair what exactly, I'm wondering)? I've not dealt with their support before, and I couldn't really find any suitable thing under their repair service categories.
Could some people check how snug their USB connector fit is and report back to me, so I could find out if this isn't how it's supposed to be?
First check your USB port for lint. I typically use a needle to clean mine out (Don't short any of the pins if using a metal needle). Lint will prevent the cable from fully seating and cause it to feel loose.
OhioYJ said:
First check your USB port for lint. I typically use a needle to clean mine out (Don't short any of the pins if using a metal needle). Lint will prevent the cable from fully seating and cause it to feel loose.
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Click to collapse
The USB port is totally clean. Couldn't even spot any dust particles under a bright light.
I know the 3.5mm headphone jack isn't technically rated for as many cycles as a USB C connector but I still feel it held up to abuse like being in a pocket better than any type of USB connector.