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USB Double adaptor

Hello,
I have purchased a htc mini-usb double adaptor, it was second hand and cheap so no support is included.
Unfortunately, when I plug it into my HTC/O2 Orbit2 the power works but my O2 headset does not work: either in its phone, or audio functions (i.e. as a radio/MP3 player), the handsets speakers are not switched off either.
Am I doing something wrong please?
Cheers, Guy.

htc don't use miniUSB adapters they use extUSB which is a std they invented themselves
putting audio pins on the other side of a normal usb connector
if the adaptor you got is normal miniusb then the audio connectors in your phone will be connected to nothing at all which would explain why it would not work
nor can you do anything about it really

Thank you, points taken.
This claims to be a HTC product?!
The plug has 11 contacts 6 up 5 down.
The outlets/sockets:
Audio/headset out has the same shape and 11 contacts as on the phone, 6 up 5 down.
Power in is the traditional miniUSB shape, and has 5 contacts only 0 up 5 down.
When I plug the headset into the adaptor the amber LED on the adaptor flashes twice.

[GUIDE] $7 cable that triggers Car Dock Mode (NO SOLDERING REQUIRED!)

WARNING! CONNECTING ANY CABLE TO YOUR PHONE THAT DID NOT COME WITH YOUR PHONE IN THE BOX COULD DAMAGE YOUR PHONE, YOUR COMPUTER, THE ELECTRICAL WIRING IN YOUR HOUSE, AND IT COULD KILL YOU!
you have been warned
Soooo I recently stumbled across this thread http://forum.xda-developers.com/showthread.php?t=744636&page=3
that states that if you short pins 4 & 5 on a micro USB connector and plug it into an HTC Desire, the phone will automatically go into car dock mode. as luck would have it, I happen to know that this is the same method that is used to trigger USB OTG on devices that support it. The wheels in my brain began to turn... $7 and a few days later I came up with this:
MICRO USB HOST ADAPTER + A BIZARRE A TO A USB CABLE = A CHARGING/DATA CABLE THAT TRIGGERS CAR DOCK MODE!
I have tested this on my G2 using Virtuous G-Lite 2.0.1 and it works perfectly, but YMMV.
I got the USB host adapter here
http://www.amazon.com/Micro-B-Adapt...3?s=electronics&ie=UTF8&qid=1328093895&sr=1-3
and the A to A USB cable here
http://www.amazon.com/StarTech-com-...3?s=electronics&ie=UTF8&qid=1328094123&sr=1-3
Just in case you haven't already figured it out you just connect the female end of the OTG adapter to either one of the male ends on the A to A cable, then use the cable as you would any other charging/data cable in your car. the only difference is that now your device will automatically switch into car dock mode when you plug it in! you could also connect this cable to a dock that has a female micro USB connector on the back (like the G2 OEM desktop dock here http://forum.xda-developers.com/showthread.php?t=1473718) and create your own car dock!
an extra word of warning, DO NOT USE THE A TO A CABLE ON ITS OWN FOR ANYTHING! this is a non-standard conforming cable that would damage any two USB devices that you attempted to connect with it. I have no idea what it's intended use is on it's own, but don't think that it is the same thing as a USB data transfer cable (transfer cables have a chip inside the cable that makes the two connected USB host devices see each other as USB slave devices. this A to A cable is just a copper wire)

Nice, I didn't know people wanted this. I got a premade cable. Off ebay that triggered car mode no mods needed and it was a buck. Lol
Sent from my HTC Vision using Tapatalk

Any idea about standard dock mode? I know the official tmobile dock auto opens a desk clock.

scottcom said:
Nice, I didn't know people wanted this. I got a premade cable. Off ebay that triggered car mode no mods needed and it was a buck. Lol
Sent from my HTC Vision using Tapatalk
Click to expand...
Click to collapse
What cable was this?
Sent from my HTC Vision using XDA App

ad505 said:
What cable was this?
Sent from my HTC Vision using XDA App
Click to expand...
Click to collapse
My guess would be that the cable was not intended to trigger car dock mode, it was just poorly made. a really bad soldering job on the pins would short pins 4 & 5 and do the same thing. Other people have reported this same behavior when they buy low end cables or get water in their micro usb ports.

I tried this and it seams to work but all it does its launch tunein radio, any idea how to change it to other apps such as torque? Thanks

The short thing does work. I my self stumbled on to it while repearing a aftermarked charger .. I opened up the mini usb side and it had a resistor on jumping pin 5( - ) to pin 4 . With the resistor on it charches with the resistor bypassed and just jumped to pin 4 it goes in to car dock mode. Also my friend got a samsung infuse and came with a hdmi dongle usb, so out of curiosity hooked it up to my g2 and it whent to car dock mode
Sent from my T-Mobile G2 using XDA

Connecting an android phone to a car with a MOST optical audio system. Help needed!

Hi all,
I have an interesting problem to pose to the techies amongst you.
I have just managed to get my dream car and now need to integrate my phone without paying the huge sums being asked for by the car manufacturers and some aftermarket electronic suppliers (car ICE specialists too). My phone is currently a Samsung Galaxy Note 3 and the car has MOST optical audio and satnav systems.
I'm after 3 distinct, yet simultaneous, solutions, which are : -
A/ power supply to the phone
B/ HDMI or RCA output to a dash mounted 5 inch lcd screen for satnav purposes
C/ audio output to link into the car's current MOST audio system (head unit in the dashboard, also running the car's hvac, and the amplifiers are in the boot)
My first thought was to open up the USB 3 cable and to run individual wires to 3 separate plugs for each of the 3 solutions listed above. At this point many of you may be laughing at my clearly very poor understanding of modern electronics, particularly USB, and I would not argue that at all - I'm a complete dimwit here! Obviously (I think...) the clear solution is in the fact that USB can run different objectives simultaneously.
So... I run my USB 3 CABLE from the phone to a (presumably powered?) USB 3 hub and have 3 appropriate cables plugged in and running respectively to A/ a USB cigarette lighter socket, B/ an hdmi (or RCA, or composite?) plug and C/ to a standard stereo headphone jack or socket.
I don't think A/ will work because I don't see power going from the socket back through the hub and into the phone. Suggestions welcomed as I can't see how to get power to the phone at the same time as having a USB cable supplying data out. Or is there power over USB through a hub available?
B/ seems straightforward enough.
C/ the audio then needs to go to an analog to digital / wired to optical adapter and then a 2 into 1 optical switch (so I can still have the existing output from the head unit) before plugging into the amplifiers. These 2 adapters are easily available through eBay, Amazon or Maplins as far as I can see. The issue I foresee here is will the head unit still be able to control volume, fade, etc of the signal coming from the phone? If the control of the amplifiers happens via the optical cables then presumably that won't happen if I've used a switch to change the source? Would taking the output from the phone's headphone socket be of any benefit? I doubt it as the output power from there may be quite a bit higher than from the USB port...
So you can see that I clearly need some knowledgeable direction here or I will be forever going round in ever decreasing circles!
Many thanks in advance for any help given. Cheers, Mark

USB OTG question

Hi all,
I recently got a Vernee Apollo Lite and was looking to connect a portable DAC (Oppo HA-2) to it so it can drive a pair of 150 ohm headphones..
I am hooking up the DAC via USB OTG & the audio works well, however the Apollo also charges the DAC - which I don't actually need, the Oppo has its own battery and I would rather have that power the DAC as the phone's battery is draining really quick this way.
Is there Any way round it?
Thanks

Any thoughts?
Cheers!

I believe USB OTG requires that the phone act as the host device, which involves supplying power to the client - like any computer would. It seems the USB micro-B port on your DAC was included with phones in mind, but in that case they should have added a mode to it so that it doesn't drain battery when connected to another battery-powered device.
I don't think it would be possible for the phone to work in OTG mode without exposing tension on the USB port (but then again, USB Type C is quite flexible with the whole alt-modes thing, so I don't really know. It would definitely require some driver hacking in the kernel). Even if it was (or if you manually cut the power lines on the USB cable), there's the question of whether the DAC would "detect" the phone with no power coming through the USB port.
Do you have an other USB OTG device (e.g. phone or tablet) where the DAC behaves as you want it to (i.e. it works but discharges its own battery instead of attempting to charge, draining the host's battery in the process)?

[Q] Wireless charging + USB C audio? (without the official USBC audio adapter)

Hello, I've bought this phone 1 week ago and it works really nice.
Some things I really don't like, like the chinese ROM (which I'm waiting for the unlock to switch to global) and the fact that we don't have the 3.5mm headphone jack.
I know that the phone comes with one adapter, but it might get damaged in the long run (the cable is not sturdy enough). I tried an USB 2.0 sound card connected to the phone using a USB C to USB 3.0 OTG adapter, but by doing that, the wireless charging stops.
In fact, anything that I plug in the OTG cable will stop the wireless charging.
So, I want to know if those cheap USB C audio sound cards will behave like the official USB C adapter, or they will stop the wireless charger.
Also, are those USB C passtrhu cables with a sound card working in this phone? Because with that, I could plug a wall charger and also get the headphones.
BTW, I know I could use BT, but thats not my idea.
Any feedback will be appreciated,
Thanks!

I think those audio jack/usb c cables should work.
The phone probably stops the wireless charging because the phone cant supply and get charged at the same time.
By using those cables you use the data pins for audio and the power pins for charging so it should work.
If you want to test this theory out use the original usb dongle and put it on the wireless charger.

The official headphone adapter is analog without a dac so it is not a usb device as such. It must use a dac already in the phone. Wireless charging works fine with it. I can confirm the plugging in a usb card reader stops wireless charging though.