Has anyone else made a tv out cable? I made one and had inference from the exposed wires electrical field with each other but used layers of different types of tape to get rid of distortion when playing audio and video. Has anyone else tried some other less tacky way?
(moderators sorry if wrong topic)
Sent from my SAMSUNG-SGH-I897 using XDA App
You can buy one that will work for about $10.
You just have to switch the right audio and video. No hacking required.
I have an Electrohome cable. Very thick and good quality.
Agree with above post. I got 2 off amazon for less than a dollar apeice. Search Ipod touch video cables. Same thing we need.
I know but wanted to make my own I must be alone on that cause couldn't find how to make one so I looked at picture of one from ebay and figured out how no help from GOOGLE™
Sent from my SAMSUNG-SGH-I897 using XDA App
Can anyone post any links for these cables ?
Thanks,
txdesi said:
Can anyone post any links for these cables ?
Thanks,
Click to expand...
Click to collapse
I was looking for one too and was wondering if one of these would work.
http://cgi.ebay.com/3-5mm-Jack-3-x-...er_MP3_Player_Accessories&hash=item1c19381544
Fyi, here's the info on the pinout of the cable (quoted below):
http://forum.xda-developers.com/showpost.php?p=10484688&postcount=131
sshvetsov said:
Sorry, I completely missed the part where you said i9000 has pins 3 and 4 swapped compared to Captivate. It's strange, but quite possible that pinout on i9000 and Captivate is different.
From the accounts I've read on this forum and according to pinouts.ru / pinoutsguide.com i9000 has the following pinout:
|----|-----|-----|-----\
|----|-----|-----|-----/
_4____3____2___1
1 - white (left audio channel)
2 - red (right audio channel)
3 - yellow (video)
4 - shield (ground)
According to your diagram Captivate has the following pinout:
1 - white (left audio channel)
2 - red (right audio channel)
3 - shield (ground)
4 - yellow (video)
This seems to be consistent with my experience using Captivate and TV-out cable from WD TV Live. I tested it just now and it has the following pinout:
1 - yellow (video)
2 - white (left audio channel)
3 - red (right audio channel)
4 - shield (ground)
Using this cable with Captivate I get scrambled image no mater which plug (red/white/yellow) I use, which makes sense if Captivate sends video signal to pin 4, the shield of all three plugs instead of the center conductor of just one. The conclusion I can make from this is that Nokia's CA-75U will not work for my Captivate.
Click to expand...
Click to collapse
The issue I've ran into so far is the cable I bought, just a generic cable, has pins 3 and 4 swapped, and if you get a cable like that there's no way to fix it.
So it would work on the i9000 according to the quote above, but it doesn't work in the captivate.
The video is sent out over ground in this case, and therefore useless.
How has everyone insuring they get a cable that works with the captivate?
heres the thing i really dont get. a 4 segment 1/8 inch plug, is pretty much only used for these type of cables. Normal headphone jacks only have 3 segments.
where did the OP get one to hack? or did he mod a 3 segment headphone jack and is only getting one channel audio? and the other audio... shorting to video in the jack?
and ya kinda not worth hacking together considering ebay...
ronkoni said:
I was looking for one too and was wondering if one of these would work.
http://cgi.ebay.com/3-5mm-Jack-3-x-...er_MP3_Player_Accessories&hash=item1c19381544
Click to expand...
Click to collapse
Wanting to know myself.
Trusselo said:
heres the thing i really dont get. a 4 segment 1/8 inch plug, is pretty much only used for these type of cables. Normal headphone jacks only have 3 segments.
where did the OP get one to hack? or did he mod a 3 segment headphone jack and is only getting one channel audio? and the other audio... shorting to video in the jack?
and ya kinda not worth hacking together considering ebay...
Click to expand...
Click to collapse
A stereo headset with a mic uses a 4 segment plug. I ordered a generic camcorder output cable from amazon for $3.09 that works on my captivate. just have to swap the the right audio with the video
Trusselo said:
heres the thing i really dont get. a 4 segment 1/8 inch plug, is pretty much only used for these type of cables. Normal headphone jacks only have 3 segments.
where did the OP get one to hack?
Click to expand...
Click to collapse
I haven't looked hard to find one but was curious if they are available to buy also.
The only reason I can see for making one is that you can build a higher quality cable then you can buy.
http://electronics.shop.ebay.com/A-...era_Cables_Cords&_fln=1&_trksid=p3286.c0.m282
Any of these will work by swapping the a/v around. it's the camcorder cables you are after.
I bought the electrohome one because the colours on the barrels for the rcas are changeable. When I got the correct barrels, I just swapped the colours to match.
I can't find them on ebay. Check your local electronics stores. It was $10.00, if you care about the colours matching.
This may also be an alternative to those wanting to use High Quality cables:
http://cgi.ebay.com/NXG-Camcorder-A...ultDomain_0&hash=item3cb62bc873#ht_500wt_1156
nickm50 said:
it's the camcorder cables you are after
Click to expand...
Click to collapse
Ah! That's the key!
Thanks
can anyone explain why the video signal comes through partially scrambled?
1: It it scrambled when the pinout order is wrong?
2: or is the scramble from some other problem?
3: when the pin order is wrong is there just no signal/no scramble?
Reason I am wondering is I have a cable I am trying, and have tried on a couple of older TV's and only got a scrambled video. Should I try with newer TV's or is the cable just flat out wrong for the captivate... It's a Samsung branded cable. :-(
pietro_spina said:
can anyone explain why the video signal comes through partially scrambled?
1: It it scrambled when the pinout order is wrong?
2: or is the scramble from some other problem?
3: when the pin order is wrong is there just no signal/no scramble?
Reason I am wondering is I have a cable I am trying, and have tried on a couple of older TV's and only got a scrambled video. Should I try with newer TV's or is the cable just flat out wrong for the captivate... It's a Samsung branded cable. :-(
Click to expand...
Click to collapse
Partially scrambled is a bad cable. If the pinout is wrong you would not get a video signal at all.
Try just plugging in the barrel that works for video and wiggling the 3.5mm connector in the captivate and see if it clears up.
BUT your best bet is getting another cable.
nickm50 said:
Partially scrambled is a bad cable. If the pinout is wrong you would not get a video signal at all.
Try just plugging in the barrel that works for video and wiggling the 3.5mm connector in the captivate and see if it clears up.
BUT your best bet is getting another cable.
Click to expand...
Click to collapse
Shoot.
I'm pissed because I paid for the Samsung cable expecting it to be a less risky proposition than ebay-roulette... (I should have just bought 3 from ebay for the same price...)
thanks for the info..
Actually, you can sometimes get a "scrambled" image if the pin order is wrong. Not sure what others see when their image is scrambled, but on one cable I have you will get something on the screen, basically a jagged line down the middle of the screen, you can tell its an image coming from the phone because it will change color if you change what is on the phone screen. I should add that I could only see the "scrambled" image on an old crt, on my lcd it just would say no signal.
If you want to check if pins 3 and 4 are swapped you need to switch the outside of the video lead to the inside and inside to outside. I did this and saw a "perfect"/ not scrambled image. Now I know for sure that cable won't work properly, and the TV out function works just fine.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Because out the pinout posted above I was wary of buying an i9000 cable. Pretty weird/stupid for samsung to change the pinout between captivate and i9000.
bnevets27 said:
Actually, you can sometimes get a "scrambled" image if the pin order is wrong. Not sure what others see when their image is scrambled, but on one cable I have you will get something on the screen, basically a jagged line down the middle of the screen, you can tell its an image coming from the phone because it will change color if you change what is on the phone screen. I should add that I could only see the "scrambled" image on an old crt, on my lcd it just would say no signal.
If you want to check if pins 3 and 4 are swapped you need to switch the outside of the video lead to the inside and inside to outside. I did this and saw a "perfect"/ not scrambled image. Now I know for sure that cable won't work properly, and the TV out function works just fine.
Because out the pinout posted above I was wary of buying an i9000 cable. Pretty weird/stupid for samsung to change the pinout between captivate and i9000.
Click to expand...
Click to collapse
If thats the cable you used,
Thats a component cable you have there.....The pin outs on it could be different again!
No, I just picked up the closest cable for the pic.
Trusselo said:
heres the thing i really dont get. a 4 segment 1/8 inch plug, is pretty much only used for these type of cables. Normal headphone jacks only have 3 segments.
where did the OP get one to hack? or did he mod a 3 segment headphone jack and is only getting one channel audio? and the other audio... shorting to video in the jack?
and ya kinda not worth hacking together considering ebay...
Click to expand...
Click to collapse
I have only right side audio because only have three segments but shore would have like to known there is a 4 segment one.. But I haven't actualy ever seen one of those cable but I wanted to make my own also
Sent from my SAMSUNG-SGH-I897 using XDA App
Related
Nexus 7 Teardown @ ifixit
Here she is, the motherboard:
NVIDIA T30L Tegra 3 processor
Hynix HTC2G83CFR DDR3 RAM
Max 77612A inverting switching regulator
AzureWave AW-NH665 wireless module
Broadcom BCM4751 integrated monolithic GPS receiver
NXP 65N04
Invensense MPU-6050 gyro and accelerometer
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Wow. For some reason I thought there would be more stuff....Or that some things would be bigger. :/
EDIT: Nevermind. It just doesn't look like much when it's all out like that.
What does this mean exactly?
Although the official Nexus page says there's a speaker in the back, we clearly see a pair of drivers.
Drivers? No Speaker?
Atmazzz said:
What does this mean exactly?
Although the official Nexus page says there's a speaker in the back, we clearly see a pair of drivers.
Drivers? No Speaker?
Click to expand...
Click to collapse
I'm not sure. They're referring to the two black rectangular mesh/screen objects towards the bottom. I'm guessing they mean a type of electrostatic transducer?
Well that's it then, no more speculation regarding MHL.
No sight of any MHL chip/transmitter on the motherboard, and the demo unit on stage at Google I/O was indeed a custom one that either uses micro USB to VGA adapter or Nexus Q to mirror its screen.
Edit: Wait, but there is a micro USB to HDMI cable, I'm confused
Doesn't it require hardware support for MHL to work.
Nice to know it includes DDR3 RAM, apparatly the same model found in the 'MacBook Pro with Retina Display'.
Also Page 1 - Step 2 states
Initially, the Nexus 7 was criticized for its lack of HDMI output. However, the included micro USB-to-HDMI cable solves that problem.
Including this picture
Time to celebrate?
xthaox said:
Well that's it then, no more speculation regarding MHL.
No sight of any MHL chip/transmitter on the motherboard, and the demo unit on stage at Google I/O was indeed a custom one that either uses micro USB to VGA adapter or Nexus Q to mirror its screen.
Click to expand...
Click to collapse
In step 2 of the teardown there is a picture of the cable and they state "Initially, the Nexus 7 was criticized for its lack of HDMI output. However, the included micro USB-to-HDMI cable solves that problem."
Will the retail ones be the same as their white backed Google I/O attendee version though...
Thanks for sharing, I've been waiting for someone to break the Nexus 7 down.
Sent from my HTC Sensation 4G using xda premium
Big_Den said:
Nice to know it includes DDR3 RAM, apparatly the same model found in the 'MacBook Pro with Retina Display'.
Also Page 1 - Step 2 states
Initially, the Nexus 7 was criticized for its lack of HDMI output. However, the included micro USB-to-HDMI cable solves that problem.
Including this picture
Time to celebrate?
Click to expand...
Click to collapse
Surely not.. but would be funny if true..
Big_Den said:
Time to celebrate?
Click to expand...
Click to collapse
Looks promising!
ebwibble said:
In step 2 of the teardown there is a picture of the cable and they state "Initially, the Nexus 7 was criticized for its lack of HDMI output. However, the included micro USB-to-HDMI cable solves that problem."
Will the retail ones be the same as their white backed Google I/O attendee version though...
Click to expand...
Click to collapse
That's why I'm confused. How does it work without any MHL transmitter on board?
How come no other reviews mentioned the inclusion of this micro USB to HDMI cable, both the AnandTech and Engadget reviews say N7 do not support MHL. They surely must have been reviewing the same unit given out for I/O attendees. I hope ifixit test if the cable even work, was it a mistake that the cable is included in their box?
xthaox said:
That's why I'm confused. How does it work without any MHL transmitter on board?
How come no other reviews mentioned the inclusion of this micro USB to HDMI cable, both the AnandTech and Engadget reviews say N7 do not support MHL. They surely must have been reviewing the same unit given out for I/O attendees. I hope ifixit test if the cable even work, was it a mistake that the cable is included in their box?
Click to expand...
Click to collapse
Yeah. Why is ifixit the only one who makes note of this. It doesn't make sense.
Yeah it does look promising. Even if it doesnt include a cable in the box, I would hope you will be able to purchase it separately. It still quite funny we dont have any concrete information :laugh:
That looks like the PC connection cable. Note the regular USB male connector, and what looks like micro-USB male connector on the other end, despite what the HDMI label says.
If this were an adapter, the HDMI connector would normally be female, to be used with regular HDMI male-male cable.
xthaox said:
That's why I'm confused. How does it work without any MHL transmitter on board?
How come no other reviews mentioned the inclusion of this micro USB to HDMI cable, both the AnandTech and Engadget reviews say N7 do not support MHL. They surely must have been reviewing the same unit given out for I/O attendees. I hope ifixit test if the cable even work, was it a mistake that the cable is included in their box?
Click to expand...
Click to collapse
Whilst I think it is a mistake by iFixit, I am wondering about the technical side of things, does Tegra 3 not have any MHL stuff in it?
e.mote said:
That looks like the PC connection cable. Note the regular USB male connector, and what looks like micro-USB male connector on the other end, despite what the HDMI label says.
If this were an adapter, the HDMI connector would normally be female, to be used with regular HDMI male-male cable.
Click to expand...
Click to collapse
To me it looks like a microusb male connection on one end (to be plugged into the Nexus) and a full size HDMI male connection on the other end (to be plugged into a TV or receiver).
e.mote said:
That looks like the PC connection cable. Note the regular USB male connector, and what looks like micro-USB male connector on the other end, despite what the HDMI label says.
If this were an adapter, the HDMI connector would normally be female, to be used with regular HDMI male-male cable.
Click to expand...
Click to collapse
I thought with the dent on its side, it looks more like a micro-USB male connector, and on the other end with HDMI label, it also looks like a HDMI male connector, considering its relative size to the micro-USB end.
>To me it looks like a microusb male connection on one end (to be plugged into the Nexus) and a full size HDMI male connection on the other end
You're probably right. Anyway, below is the cable that normally comes with the I/O package. There is no other cable in the unboxing.
http://www.technobuffalo.com/compan...low-price/attachment/google-galaxy-7-charger/
What's with the HDMI cable reference in there? Thought it didn't have MHL or anything
Plus the smaller connector with the wide RIM looks like one of the cables you'd plug into the Q
EDIT: I'm not really convinced that it is a HDMI male connector
Slap-Yourself :) said:
I'm not sure. They're referring to the two black rectangular mesh/screen objects towards the bottom. I'm guessing they mean a type of electrostatic transducer?
Click to expand...
Click to collapse
This is how someone else explained it to me.
NeoteriX said:
By stereo speakers, I basically mean there are two drivers (speakers, same thing), one for the right channel audio, and one for the left channel audio.
As a practical matter however, the stereo effect will be nil or negligible because 1) there is almost no stereo separation (distance between speakers), and 2) when held in landscape, both channels will be only coming from one side.
Click to expand...
Click to collapse
So similar to what was found on the Samsung Galaxy Nexus, does anyone know where the source file exists that explains what the 4 POGO pins on the left side of the Nexus 7 are for? I cannot figure them out with my multimeter or oscilloscope.
Samsung Galaxy POGO thread: http://forum.xda-developers.com/showthread.php?t=1614287
File on Samsung Galaxy Nexus was board-tuna-pogo.c but that is obviously not on the Nexus 7 because it is made by Asus and I assume they had a different file.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Close up of the POGO insternals from ifixit.com:
My assumption is that there will be a dock of some sort that will be using those contacts.
I make this assumption from my old Nexus One where they also had contacts similar for charging.
I'm not entirely sure, but one of the pins could be for charging and another for ground. And possibly the other two are for audio out.
Just a guess lol
Sent from my HTC One X using xda app-developers app
Since there are 4 pins, I get the feeling it could be USB? 2 for data + 2 for power and since now Android has support for USB audio it wouldn't matter? I just wonder how you could do power and stereo audio since you would need a ground + 2 for audio and 2 for power...
tomascivinod said:
Since there are 4 pins, I get the feeling it could be USB? 2 for data + 2 for power and since now Android has support for USB audio it wouldn't matter? I just wonder how you could do power and stereo audio since you would need a ground + 2 for audio and 2 for power...
Click to expand...
Click to collapse
Nope, ground is ground. Could use the negative terminal for ground, so could be + l r -
One thing for sure, unlike the title of this topic, they are not GPIO pins.
My vote is for stereo audio, ground, and charging. Buy a dock from Asus and see.
rmm200 said:
One thing for sure, unlike the title of this topic, they are not GPIO pins.
My vote is for stereo audio, ground, and charging. Buy a dock from Asus and see.
Click to expand...
Click to collapse
If Asus had one available I would buy it!
That said, here is what I found so far...
Top Pin (1): Ground
2: ???
3: ???
4: Data (minus) ???
Tried hot glueing wires into the pogo ports to conduct more tests, but quickly realized it was easier to just pop the back off and wire them directly to the board itself.
Protip: apply 5V between your pin 1 and 4 and watch dmesg.
POGO connection product from ASUS
Here's the product that connects to the pins:
http://www.droid-life.com/2012/07/30/official-nexus-7-accessory-lineup-leaks-pogo-dock-incoming/
JB
peterpressure said:
So similar to what was found on the Samsung Galaxy Nexus, does anyone know where the source file exists that explains what the 4 POGO pins on the left side of the Nexus 7 are for? I cannot figure them out with my multimeter or oscilloscope.
Samsung Galaxy POGO thread: http://forum.xda-developers.com/showthread.php?t=1614287
File on Samsung Galaxy Nexus was board-tuna-pogo.c but that is obviously not on the Nexus 7 because it is made by Asus and I assume they had a different file.
Close up of the POGO insternals from ifixit.com:
Click to expand...
Click to collapse
jb7890 said:
Here's the product that connects to the pins
Click to expand...
Click to collapse
Well, I am hellbent on beating Asus to the punch!
pokey9000 said:
Protip: apply 5V between your pin 1 and 4 and watch dmesg.
Click to expand...
Click to collapse
Thank you for this tip! Great help.
I apply GND to pin 1 (top pin) and 5V to pin 4, dmesg (cat /proc/kmsg in Terminal Emulator) says the following upon +5volt insertion.
<4>[ 232.369780] INOK=L
<5>[ 232.370361] smb347_charger: [cable_type_detect] Reg3F : 0x03
<4>[ 232.370850] USBIN=0
<4>[ 232.371113] inok_isr_work_function -
When I remove +5volts it outputs the following:
<4>[ 241.459841] INOK=H
<4>[ 241.460260] ========================================================
<4>[ 241.460933] battery_callback usb_cable_state = 0
<4>[ 241.461296] ========================================================
<4>[ 241.461969] inok_isr_work_function -
But it never starts charging! ARGHHH!!!!
hmm im looking it my self i tryed 2 cables and i didnt work how ever i did im guna get a mutimeter cables and use the pins on that so see what it does
ryhamster said:
hmm im looking it my self i tryed 2 cables and i didnt work how ever i did im guna get a mutimeter cables and use the pins on that so see what it does
Click to expand...
Click to collapse
Wat?
dw mate
pokey9000 said:
Wat?
Click to expand...
Click to collapse
ryhamster said:
dw mate
Click to expand...
Click to collapse
Please do not clutter this thread with anything other than real findings related to the software or hardware involved with the POGO pins.
Ok, small update!
Turn the tablet off, and apply GND to Pin 1 (top pin) and +5Volts to Pin 4 (Bottom pin) and Voila!
IT IS CHARGING via the POGO pins! (but only when turned off)
When I turn the tablet on, it stops charging.
Pictures:
tinkering rox!
Anticipation! I hope you find out the details and are able to make something nice out of it.
My suggestion would be to make something small/slender, that could be adapted to any standard folio type case for the N7 which would allow it to "dock" without taking it out of the casing and use what ever features are available via the POGO.
GL!
-CC
Is it possible to see if the pins is routed anywhere on PCB?
What kind of hardware (text on chip etc) can be found close to pins?
Is there any direct connection to usb from the pins?
If possible, ohm measure would be interesting.
mippen said:
Is it possible to see if the pins is routed anywhere on PCB?
What kind of hardware (text on chip etc) can be found close to pins?
Is there any direct connection to usb from the pins?
If possible, ohm measure would be interesting.
Click to expand...
Click to collapse
The two middle pins don't have any of the voltages you'd need for USB host handshake. In fact they're high impedance at DC. I'm pretty sure they're AC coupled audio out.
---------- Post added at 12:56 PM ---------- Previous post was at 12:51 PM ----------
peterpressure said:
Ok, small update!
Turn the tablet off, and apply GND to Pin 1 (top pin) and +5Volts to Pin 4 (Bottom pin) and Voila!
IT IS CHARGING via the POGO pins! (but only when turned off)
When I turn the tablet on, it stops charging.
Click to expand...
Click to collapse
So the dock charging is implemented in the bootloader but not in the kernel. Expect an OS update around the time the dock is released.
BTW Bluetooth V2.0+EDR Audio Communications Module... Sounds fun
i got the same thing on the pogo pins only if its turned off but doesnt charge for long
clockcycle said:
My suggestion would be to make something small/slender, that could be adapted to any standard folio type case for the N7 which would allow it to "dock" without taking it out of the casing and use what ever features are available via the POGO.
Click to expand...
Click to collapse
Exactly!
mippen said:
Is it possible to see if the pins is routed anywhere on PCB?
What kind of hardware (text on chip etc) can be found close to pins?
Is there any direct connection to usb from the pins?
If possible, ohm measure would be interesting.
Click to expand...
Click to collapse
So this tablet is very easy to open. I kept looking inside but it is a multilayer PCB, so without further disassembly it would be hard to see.
I think we can figure it out via other means.
pokey9000 said:
The two middle pins don't have any of the voltages you'd need for USB host handshake. In fact they're high impedance at DC. I'm pretty sure they're AC coupled audio out.
Click to expand...
Click to collapse
How can I test this with a sound device?
pokey9000 said:
So the dock charging is implemented in the bootloader but not in the kernel. Expect an OS update around the time the dock is released.
Click to expand...
Click to collapse
I hope this is not the case! Seems ridiculous to require the user update the OS to use the dock, but who knows.
ryhamster said:
i got the same thing on the pogo pins only if its turned off but doesnt charge for long
Click to expand...
Click to collapse
I charged all the way from 0% to 100% via the pogo pins today (with the tablet off). Worked like a charm for me!
peterpressure said:
How can I test this with a sound device?
Click to expand...
Click to collapse
The simplest test, assuming there is no detection going on to enable those pins (they're always enabled): Take any amplifier with a set of speakers, turn its volume all the way down, and turn it off. Run a wire from one of those supposed audio pins to a right or left input on the amp. Run another wire from the output/ground on that terminal to ground. Turn the amp on. Play sound on the tablet and gradually turn the volume up.
If the sound is reproduced by the amp, they're enabled and functional. If not, the tablet may need to be fully docked and receiving power before it enables the audio pins.
I've searched and never seen an actual 'buyable' product linked on the forums so if this is a dup, I apologize.
Anyone try one of these and see if you can have your Nexus in host mode and charge at the same time?
Is the only option for the female Micro USB port to bring more charge to a usb device plugged in and not to bring charge
to the Nexus itself?
Two scenarios would make this ideal for me:
1.) using my usb xbox controller to play games yet still keeping my tablet charged
2.) using a usb thumb drive to play a movie while still keeping my table charged
I think this would be pretty cool if it worked but I don't know the technical details on if it can be done with our Nexus 7's:
http://www.ebay.com/itm/110931117836
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Looks like it's meant for providing power to the USB device you connect (e.g.. external hard drive) instead of to the Nexus7...
The eBay description says it provides charging the the micro-USB port. Only way to know is to buy it and try it out
Who's going to be the Guinea pig?
Sent from my Nexus 7
Hell, I'd do it, but I don't have a Nexus seven yet. LOL
I've been waiting for someone to get a working solution fit this before I purchase one. That and I need good 3.5mm sound quality and I've read its ****e on the Nexus 7.
Blasted from my HTC Rezound (Zone23s Newtified 3.2.1)
RED ZMAN said:
Hell, I'd do it, but I don't have a Nexus seven yet. LOL
I've been waiting for someone to get a working solution fit this before I purchase one. That and I need good 3.5mm sound quality and I've read its ****e on the Nexus 7.
Blasted from my HTC Rezound (Zone23s Newtified 3.2.1)
Click to expand...
Click to collapse
My sounds works fine, and I haven't even bothered getting the volume + app yet for tweaking. I think there's just no pleasing some ppl with a bare bones tablet like this one.
-Ara
Sent from my Nexus 7 using xda app-developers app
I have a OK Galaxy Tab in the dash of my car, and use the headset port for music, didn't want to upgrade without seeing one in person.
Hopefully some sort of dock solution will make Otg and charging possible and I can upgrade. Thanks!
Sent from my Transformer TF101 using Tapatalk 2
Ordered 1, but says shipping is between September 7 to September 20 haha
OTG and Charging is mutually exclusive, the OTG cable triggers the USB controller to send power out to a device, not receive power.
the pogo docks on the bottom of the device are also impossible to charge from as the nexus 7 has only been given one charging circuit, and that is the same one that OTG disables.
The only way to achieve something like this would be a physical battery hack where you splice in a charging circuit direct to the battery, without frying the phone maybe some unidirectional resistors, so that it can be simultaneously charged whilst powering the device.
I'm 99% certain of this information, and this is not to say someone might hack a kernel together one day
you might be able to install one of them batteries you can just set it on a charging pad and it will charge
barkerd25017 said:
you might be able to install one of them batteries you can just set it on a charging pad and it will charge
Click to expand...
Click to collapse
davidcampbell said:
OTG and Charging is mutually exclusive, the OTG cable triggers the USB controller to send power out to a device, not receive power.
the pogo docks on the bottom of the device are also impossible to charge from as the nexus 7 has only been given one charging circuit, and that is the same one that OTG disables.
The only way to achieve something like this would be a physical battery hack where you splice in a charging circuit direct to the battery, without frying the phone maybe some unidirectional resistors, so that it can be simultaneously charged whilst powering the device.
I'm 99% certain of this information, and this is not to say someone might hack a kernel together one day
Click to expand...
Click to collapse
I have a ZAGG battery pack I'm planning on trying this with and I will report back I also have that same pad and I can get a fairly cheap charger to place on the matt as you say. Either way that wouldn't be very convenient, but I'll check it out
Sent from my Galaxy Nexus
davidcampbell said:
OTG and Charging is mutually exclusive, the OTG cable triggers the USB controller to send power out to a device, not receive power.
Click to expand...
Click to collapse
Wrong. https://github.com/teamhacksung/and...mmit/4c1c965b168bc4488ef66889e1c8933bc1b3de46 for an example on Galaxy S2/Note
As to whether the adapter linked is a proper OTG ACA (they're VERY hard to find) and whether the grouper supports OTG ACA is unknown. It's something a kernel developer can probably implement.
Thanks Entropy512, I can see it working on other devices, that gives me hope... I might rig something up myself now, I've wanted to take a cheap usb keyboard plastic leather cover, and build in an extra battery, card reader and usb hub, now this might be theoretically possible
http://forum.xda-developers.com/showthread.php?t=1822653
I don't have a N7 yet, but when I get one I want to try that.
Sent from my SGH-I777 using xda app-developers app
I can confirm that simply splicing a standard OTG cable into the port and plugging in a power cord will not work. I thought I'd utilize the empty socket from where the rear camera was supposed to go, and try to fit the OTG-to-microSD set-up inside of the Nexus. I bought a salvaged USB/headphone port from a damaged Nexus off of Ebay for $1 and the smallest microSD adapter I could find. With the use of a ribbon cable from an old laptop, some trimming, and some REALLY careful soldering I was able to make it work... sorta. Stickmount sees the card and everything runs great, until you plug in a power cord. Then, it disables the microSD adapter, and even though Stickmount says it's there, no files are visible. Also, the Nexus won't charge with this arrangement.
It might work with a different set up, but simply mimicking the OTG cable will not allow a Stickmounted volume and when the charger is plugged in.
(BTW - To make everything fit, I had to use a Dremel to grind away some of the mid-frame area around the rear camera space. It's a tight fit, but keep in mind that until you have a spare mid-frame, like I do, you'll obviously void your warranty.)
ED2O9 said:
I can confirm that simply splicing a standard OTG cable into the port and plugging in a power cord will not work. I thought I'd utilize the empty socket from where the rear camera was supposed to go, and try to fit the OTG-to-microSD set-up inside of the Nexus.
...
Stickmount sees the card and everything runs great, until you plug in a power cord.
Click to expand...
Click to collapse
I tried this very thing, same results.
Has anybody tried charging through the pin connectors on the left side?
Mechanio said:
I tried this very thing, same results.
Click to expand...
Click to collapse
Same here, only I went a step further and added a 36k resistor from the ID line to ground and that didn't do anything either.
Hope all your work ends in success.
I would like to put this device as a car Entertainment system later. But charging and USB otg is a must.
NEXUS 7
It's a nice method to use in a couple of years your old Nexus 7 as a seedbox
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
www.youtube.com/watch?v=EAnY8tRxGSg
Coming Internally Soon to a Nexus 7 near you...
This is the picture of the device EXTERNALLY;
What we are now trying to accomplish is internally setting this up. I ordered a microSD reb mount connector that will allow a ground to be present once the memory card is inserted. This will allow me to utilize the points for SWITCH and enable disable OTG mode. I also ordered a 5v step-up board to test another theory I would like to put in place, in short, not utilizing OTG mode at all.
haha, as if. i was just saying this to a friend today it would be better to do this instead of using a cable. good job.
zakafx said:
haha, as if. i was just saying this to a friend today it would be better to do this instead of using a cable. good job.
Click to expand...
Click to collapse
I'm going to try my best if not make it internal have a CNC MFG'ed USB Dock by next week.
Very cool! Looking forward to see how this comes out
Sent from my Black "Destroy Mode" Nexus 7
Finally somebody that's diving into the deep end on this project. I like it. Keep it up.
Sent from my Nexus 7 using XDA Premium App
If this can be installed internally, this would prove to be a great solution to the OTG issue... Looking forward to watching progress :good:
I assume you're aware that previous internal OTG's have interrupted USB communications, have you resolved that part (I assume being able to switch the OTG part in/out as necessary)?
Oh, interesting... Get this done, or even a real nice compact USB dongle and I'll get a n7 and buy it from you!
Sent from my iPad using Tapatalk HD
khaytsus said:
I assume you're aware that previous internal OTG's have interrupted USB communications, have you resolved that part (I assume being able to switch the OTG part in/out as necessary)?
Click to expand...
Click to collapse
Yes I am aware that this is a huge issue for anything data related. I also noticed that most diagrams for D+ and D- are backwards which might stop some progress, which it did in my case. See attached image for CORRECT wiring of a USB Port. I blew out at least 3 microSD Cards already but thats not a big deal to me. However the mouse and keyboard on a hub has been working flawlessly no matter how many times i switch back and forth. Seems like anything that needs to read FAT32 or NTFS is a big fail for me at this point. I think that is more a software problem then anything though.
I'd also like to add to others trying to complete something like this once the Sense switch is grounded 5V is provided out to the device to power it. If the sense switch isn't grounded then 5V is not being pushed only pulled to charge.
I wish you the very best of luck, as I have been researching this avidly for awhile and sketching out possible solutions in my head.
I hope you and other readers have seen the numerous similar threads on this topic. As I think you are aware, the chief problem relates to retaining the charging/peripheral functionality of the nexus while also permitting it to act as host to mice/drives/etc. Your microswitch is a simple and clean solution for this, although as you mention on youtube you can't do both at the same time. I guess that would be the holy grail. I'm afraid some of the hackers out there are in for a nasty surprise when they complete their mods and realize they can no longer charge their nexus. Your microswitch eliminates that nasty surprise.
For the benefit of readers, here are some similar mod attempts that I've found most informative:
http://forum.xda-developers.com/showthread.php?t=1866988
http://forum.xda-developers.com/showthread.php?t=1854904
http://rootzwiki.com/topic/30797-op...in-micro-sd-card-reader-to-nexus-7-build-log/
Edit: Sorry xboxexpert, looks like we posted at the same time. Glad to see we're on the same page.
littleguy77 said:
I wish you the very best of luck, as I have been researching this avidly for awhile and sketching out possible solutions in my head.
I hope you and other readers have seen the numerous similar threads on this topic. As I think you are aware, the chief problem relates to retaining the charging/peripheral functionality of the nexus while also permitting it to act as host to mice/drives/etc. Your microswitch is a simple and clean solution for this, although as you mention on youtube you can't do both at the same time. I guess that would be the holy grail. I'm afraid some of the hackers out there are in for a nasty surprise when they complete their mods and realize they can no longer charge their nexus. Your microswitch eliminates that nasty surprise.
For the benefit of readers, here are some similar mod attempts that I've found most informative:
http://forum.xda-developers.com/showthread.php?t=1866988
http://forum.xda-developers.com/showthread.php?t=1854904
http://rootzwiki.com/topic/30797-op...in-micro-sd-card-reader-to-nexus-7-build-log/
Click to expand...
Click to collapse
Retaining the charging isn't going to work with OTG mode on considering the 5V is pushed out in OTG mode not pulled in. Its like a break light in a car, reversed polarities + & - when you hit the break when you have your parking headlights on. I don't know of a way at this time because of hardware limitations to make charging work while in OTG mode. Meaning to power the device and have a MicroSD card work all the time is not going to happen in my mind right now. I could try charging while my wiring is plugged in but I'm pretty certain I'll blow at least one thing out on the nexus board.
P.S - 30 AWG Kynar wire (wrapping wire) is the way to wire anything in this tight device not Cat5 wire.... :/
xboxexpert - Yes, we're in complete agreement. Simultaneous charging and hosting may be the mythical unicorn here, and I'm glad you (unlike some modders) recognize that before pulling out the dremel tool .
The best lead I have on the simultaneous thing would be to implement what the USB spec calls "Accessory Charger Adapter". See Chapter 6, and in particular Figure 6-2 from the specification:
www(dot)usb(dot)org/developers/devclass_docs/BCv1.2_070312.zip
Two problems with ACA, however. I can't for the life of me find a vendor who sells one of these dongles (although there seem to be a few IC's now incorporating the spec). Second I think you would need to physically break the data traces leading to the original micro-b receptacle (the easiest place might be on the ribbon cable). Otherwise you would have data collisions between the internal device and any pc/peripheral/otg device attached to the micro-b receptacle. To permit pc/peripherals/ or other data devices to mate with the nexus, you'd have to install a second micro-ab receptacle into the nexus housing. At the end of the day, the original usb port could be used for charging only, while the new micro-ab port could be used to automagically connect to both peripherals (mice, thumbdrives, etc via otg cable) and hosts (PCs).
littleguy77 said:
xboxexpert - Yes, we're in complete agreement. Simultaneous charging and hosting may be the mythical unicorn here, and I'm glad you (unlike some modders) recognize that before pulling out the dremel tool .
The best lead I have on the simultaneous thing would be to implement what the USB spec calls "Accessory Charger Adapter". See Chapter 6, and in particular Figure 6-2 from the specification:
www(dot)usb(dot)org/developers/devclass_docs/BCv1.2_070312.zip
Two problems with ACA, however. I can't for the life of me find a vendor who sells one of these dongles (although there seem to be a few IC's now incorporating the spec). Second I think you would need to physically break the data traces leading to the original micro-b receptacle (the easiest place might be on the ribbon cable). Otherwise you would have data collisions between the internal device and any pc/peripheral/otg device attached to the micro-b receptacle. To permit pc/peripherals/ or other data devices to mate with the nexus, you'd have to install a second micro-ab receptacle into the nexus housing. At the end of the day, the original usb port could be used for charging only, while the new micro-ab port could be used to automagically connect to both peripherals (mice, thumbdrives, etc via otg cable) and hosts (PCs).
Click to expand...
Click to collapse
In theory if you were to in fact break the trace and split the 5v line to do either or since the only difference is 5v polarity is pretty easy in its self. Fitting it all in the unit with a device that does just that for a all in one effect is quite the contrary. I am however actively building a dock (mock-up) to do just this. So as this thread stated completely internal for what we are trying to acquire, speaking about now, it may be imposable.
Then again if KERNEL Devs were able to detect when the power cable was inserted somehow and switch off or program a feature to defeat this...we would probably be talking a different story. I recall the Nook Color had OTG capabilities that were kernel unlocked down the road. I wonder if I took a stroll over there and did some digging looking into its development if there might be some light shed on this issue. Also if its not a problem now for the Nook Color what was fixed...
Rock on with the dock. I'll keep my eyes open for that thread I'm looking to build a gaming-oriented enclosure for my nexus, and if an external ACA solution can be found, I'll likely integrate that into my enclosure along with the joysticks, buttons, etc.
I too recall some progress with the nook color. IIRC the nook wasn't actually powering peripherals when in host mode, so the charging thing was a slightly different animal. I may be wrong on that.
I am going to remove the Sense wire to trip 5v through the port and instead test with external 5v power to the device. I wonder if the device powered externally will show in Stick Mount. If so I will tear this puppy apart tonight and pin out the entire board to find a solid 5v point. In theory I can as of now pin it to the red wire on the battery giving off 3.9v-4.0v but that would under power a hub but may power a sd card.
More progress tonight let me get back to work
Anyone interested in doing some reading about USB Host Support for Nook Color??
http://forum.xda-developers.com/showthread.php?t=1459892
There are a bunch of folks looking hard for a +5V pin other than from usb. It's actually not easy since the board is mostly 3.3V and batteries are in series at 7.4v. Before spending a lot of time on this, I would strongly urge you read the links in my post above (post #10). Especially the second link starting at post 14. Might save yourself a lot of headache. Hope this helps.
littleguy77 said:
There are a bunch of folks looking hard for a +5V pin other than from usb. It's actually not easy since the board is mostly 3.3V and batteries are in series at 7.4v. Before spending a lot of time on this, I would strongly urge you read the links in my post above (post #10). Especially the second link starting at post 14. Might save yourself a lot of headache. Hope this helps.
Click to expand...
Click to collapse
Yes we need to find the 5v regulator that regulates the 5v that comes out of the USB port once Sense is triggered. Its somewhere close just need to cut the trace and trigger it for a 5v point.
Also Google LM2940CSX or LM2940CSX-5 is what we would need to down-step the 7.4v line a better option for what we want to achieve. Also looks like that regulator may be the PERFECT fit in where the back camera would go and perhaps solder it to the area for heat reduction.
http://www.mouser.com/ProductDetail...Tw7kGbQ9TGCJPy01/W7fOCrYLg5Oxaj4RaijGJwdWejt/
Looks like I may have a few of those available. I'll see what I can do tonight.
=)
REQ ENTERED FOR 2003106-5PCS FOR DELIVERY
I requested (5) of those 5v regulators to test tonight from my stockroom. I'll have some solid progress a lot later on tonight.
littleguy77 said:
There are a bunch of folks looking hard for a +5V pin other than from usb. It's actually not easy since the board is mostly 3.3V and batteries are in series at 7.4v. Before spending a lot of time on this, I would strongly urge you read the links in my post above (post #10). Especially the second link starting at post 14. Might save yourself a lot of headache. Hope this helps.
Click to expand...
Click to collapse
where do you get 7.4v from when the leads from the battery are reading 3.7 and 1.7?
-unless you're adding the two 3.7v leads together to get 7.4v. In which case you'd need to sum the two leads before the 5v regulator drops the voltage to 5v. Unless that regulator can step up the voltage from 3.7 to 5v (haven't looked up the part #s yet)
nst6563 said:
where do you get 7.4v from when the leads from the battery are reading 3.7 and 1.7?)
Click to expand...
Click to collapse
littleguy77 said:
...and batteries are in series at 7.4v.
Click to expand...
Click to collapse
Two cells, 3.7V each, in series. (sorry was unclear) At least that's what they're saying in the other threads I referenced earlier. I can't confirm or deny, just passing along info...
I bought two of these http://www.ebay.com.hk/itm/ws/eBayISAPI.dll?ViewItem&item=160922293980
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Mainly to use in the car so I can have one cable for both power and aux out.
They work OK but there is a low level interference noise when the phone is charging. If you reduce the charging current using stweaks (I am using perseus kernel) to 500mA the noise reduces quite a lot.
I have another cable on order from another supplier, I'll see if that is better shielded on the aux side to keep out noise.
Edit: just been for a drive and the sound quality is fantastic compared with bluetooth with the charger off. The noise is very noticable when a track has a low volume. Going to try some tweaks or maybe a ferrite core on the cable to see if I can improve it.
The other idea was to mhl instead and get a hdmi to av composite converter as my head unit has a 7" pop out screen so I can mirror the screen on my phone
You can make your life a lot easier by getting this for $1 from Monoprice. Its a matching white Type A male to micro-usb Type B cable, gold plated, with 28/24AWG data/power wires, and ferrite core filter. Just cut off micro-usb end along with ferrite code and splice it with your cable. I assume ferrite bead core isolates and filters power wires only considering this is 24AWG cable to handle 3.5A.
exactly what i've been looking for! do you have link to the other cable you purchased?
maybe something like this http://www.amazon.com/PAC-SNI-1-3-5...290739&sr=1-4&keywords=aux+cable+noise+filter for the ground noise?
Any updates on this? Can you test if cm10.1 based ROMs have USB audio out as well?
Ground loop isolator looks interesting, if thats what the cause is.
I tried a ferrite and it did not help, although I attached it to the micro end not the USB A end, might try moving it.
I got a HDMI to composite converter for the car which has the added bonus that I can mirror my screen on the 7" screen on the head unit listen to music, play movies, have the nav up there etc. Initial testing shows the audio quality is OK, I'll have to make some more comparisons to judge it properly
FWIW, I bought a black one and a white one. Theory was since they came from different sellers they may be different cables other than color. Well, theyre both the same. I set it up in my car and I have beautiful audio. The volume level is proper, no hisses or crackles, just great. Charging might have taken a minor hit, but it still charges with the screen on at full brightness so it's good enough! Screw bt audio. Until head units start coming with Apt-X, regular a2dp is complete garbage.
farfromovin said:
FWIW, I bought a black one and a white one. Theory was since they came from different sellers they may be different cables other than color. Well, theyre both the same. I set it up in my car and I have beautiful audio. The volume level is proper, no hisses or crackles, just great. Charging might have taken a minor hit, but it still charges with the screen on at full brightness so it's good enough! Screw bt audio. Until head units start coming with Apt-X, regular a2dp is complete garbage.
Click to expand...
Click to collapse
Link?
raduque said:
Link?
Click to expand...
Click to collapse
Same as the OP I believe. There is only one cable like this on ebay advertised for our phones, it only works with the Perseus kernel too...
I bought two of these cables(black) from ebay for cheap. One of them was totally defective as it wouldn't even fit the note II's port but the other one works just fine. Great audio(totally dependent on your setup) and fast charging with my 4.2 amp dual usb charger and it's got that nice tight fit that makes everyone happy. It doesnt work with the jelly bean or later kernels so you MUST install perseus kernel. It's pretty awesome having to plug in only one cable. No more crappy wireless audio for me :victory:
jjschind said:
I bought two of these cables(black) from ebay for cheap. One of them was totally defective as it wouldn't even fit the note II's port but the other one works just fine. Great audio(totally dependent on your setup) and fast charging with my 4.2 amp dual usb charger and it's got that nice tight fit that makes everyone happy. It doesnt work with the jelly bean or later kernels so you MUST install perseus kernel. It's pretty awesome having to plug in only one cable. No more crappy wireless audio for me :victory:
Click to expand...
Click to collapse
Devil kernel as well as Trinity work too
Has anyone tried it on a CM/AOSP based ROM?
D3_ said:
Has anyone tried it on a CM/AOSP based ROM?
Click to expand...
Click to collapse
Yeah, no worky...
How does this manage to work...? I wouldn't think there would be enough pins on the MicroUSB port...
KosanRio said:
How does this manage to work...? I wouldn't think there would be enough pins on the MicroUSB port...
Click to expand...
Click to collapse
Theres 11 pins, 5 of them are regular USB and there is another row of 6 which are proprietry and do hdmi, audio out etc.
But the cable appears to only use the 5 normal ones...
KosanRio said:
But the cable appears to only use the 5 normal ones...
Click to expand...
Click to collapse
The sgs2 which had a 5 pin port was also capable of it. The official Samsung car dock took advantage of it.
Sent from my GT-N7100 using xda premium
jjschind said:
I bought two of these cables(black) from ebay for cheap. One of them was totally defective as it wouldn't even fit the note II's port but the other one works just fine. Great audio(totally dependent on your setup) and fast charging with my 4.2 amp dual usb charger and it's got that nice tight fit that makes everyone happy. It doesnt work with the jelly bean or later kernels so you MUST install perseus kernel. It's pretty awesome having to plug in only one cable. No more crappy wireless audio for me :victory:
Click to expand...
Click to collapse
Looking for some clarification, does that mean that a stock Note II, such as a Verizon model, that's gotten its regular OTA updates to 4.1.1 won't work with this cable? Or will it not work with any USB -> audio out cable/dock/etc.?
matguy said:
Looking for some clarification, does that mean that a stock Note II, such as a Verizon model, that's gotten its regular OTA updates to 4.1.1 won't work with this cable? Or will it not work with any USB -> audio out cable/dock/etc.?
Click to expand...
Click to collapse
To clarify- Samsung firmware Jelly Bean and above lost car dock mode in favor or smart dock mode. The only way to make this cable work is with a custom kernel that enables car dock mode in TouchWiz.
Or, buy a iBOLT cable that enables smart dock mode on any JB firmware. I haven't measured mine yet to find out what the resistances are to enable it. There is some more info on this type of stuff in the S3 forums if you wanted to make one.
Ground loop isolator takes care of the engine noise / charging interference / noise. Got mine at Radio Shack for $9.
sorry to revive old thread but i got the cable from amazon through a seller named EZCart out of north carolina and got it all hooked up. Sound works great and i didn't even need a ground loop isolator or a ferrite core.Only issue is that I can't get the phone audio to play through the car speakers, i have searchhed numerous forums and the closest thing i found was that turning off the speaker should send the audio to the car but that still didn't work, has anyone been able to get phone call audio to play through the usb if so how? Thanks
Edit: I'm running Perseus Kernel on Jelly Beans 18