Connecting to car stereo

[t.gilbert]

Hi

Just after some input on connecting to a car stereo. My thoughts

1) I have read the guide on creating your own mini usb to 3.5mm jack plug cable and have also seen similar things for sale
2) I have seen on a car forum for the car i own a guide for making a cable connecting 3.5mm jack plug to the AUX on the car stereo (used for the cd changer).
3) I can charger my kaiser through a usb cable in the car.
4) There is obviously a power source on the stereo.

Given the above, would it be possible in theory to have a direct connection between the phone usb and the stereo that would allow the phone to play through the stereo and also charge it at the same time?

I dont want to go through the process of doing it if there is some fundamental reason why it cant be done.

[leebatch]

this might be wht your looking for hxxp://cgi.ebay.co.uk/3in1-usb-Adapter-for-HTC-KAISER-P4550-TYTN-II-VARIO-III_W0QQitemZ190232228190QQcmdZViewItem?hash=item1 90232228190&_trkparms=72%3A12%7C39%3A1%7C65%3A12&_trksid=p3286.c0.m14

[jackleung]

Of course you could. But keep in mind that your microphone won't work for most usb+3.5mm adapter. It's very troublesome to pick up the phone. I would recommend you to opt for BT route. e.g. Stereo bt headset w/ 3.5 mm adapter like Sony Ds-220 or BT head unit like JVC BT-1

[5manarmy]

Something you might have to research is alternator whine.

I made a lead myself as you described. But as long as the device was charging There would be a buzzing coming from the speakers. This went away when running on battery power and when the device was fully charged.

I also tried a bluetooth device, and again if I tried to use it while it was charging I would get the dreaded buzzing.

I still have not found a solution. FM transmitters have never worked either for me. There is not enough space between channels here.

[jackleung]

Something you might have to research is alternator whine.You can solve this by installing ground looping isolator if the power source from yr car is not clean

[gidim]

Hi.

I had the same problem, see my solution with the help of others:
http://forum.xda-developers.com/showthread.php?p=2353474

Good luck.

[t.gilbert]

Well I think based on what I have read and the replies on here I am going to give it a go.

I will update on here once completed

[Tx1oss]

I have a bluetooth stereo in my cab and my phone connects to the stereo using the bluetooth, I am also able to use Btmusic and play anything on my phone thru my car stereo its great for the odd file just wish it would do video as well thru bluetooth.
Os

[Schooleydoo]

Of course you could. But keep in mind that your microphone won't work for most usb+3.5mm adapter. It's very troublesome to pick up the phone. I would recommend you to opt for BT route. e.g. Stereo bt headset w/ 3.5 mm adapter like Sony Ds-220 or BT head unit like JVC BT-1

The original mic supplied works okay for me with the headphones chopped, but its very echoey even mounted as far from my speakers as possible so would agree with the above.

Ive the same setup in my car. The phone stuff was easy, it was getting the right VAG adapter to fit my cars HU that gave me the most trouble.

I also hardwired in my charging cable to keep it tidier and my cig lighter free, might be worth thinking about.

[t.gilbert]

I have made a start on this. I have wired in the cable from the Car stereo and at the moment this ends with a 3.5mm Jack Plug. I have also bought the YC A200 cable from HTC which allows connection of the 3.5mm jack plug, a wired headset and also mini usb charging. In fact two of the HTC cables were delivered to me (one ordered but 2 delivered and invoiced) so I might use one as a development cable.

So far - music plays through stereo ok, not over impressed with the quality so far but am going to fiddle with the settings. SatNav also plays through the stereo - much easier to hear. I have had an issue this morning when having music playing and satnav running that the GPS signal was being lost. Not sure if this is a problem with running the two things at once or an interference issue from somewhere. I have never had problems with the GPS before. Am going to do a soft reset and try again on the way home tonight.

I was looking at hardwiring the charging cable to tidy things up and free up the lighter socket. I was going to use the 12v feed from the stereo. Is there anything I need to do or be aware of on this?

How does the mic etc work? I know you can use the headset but I would prefer to use the car speakers if possible. We also have a number of old nokia car kits at work which I was thinking of using for the mic. Would the speaker side work if I connected the relevant cables from the headset port on the HTC adaptor to the 3.5mm jack plug connections?

[Schooleydoo]

Im just using the mic from the supplied headset, chopped off the cable past the mic/volume slider and mounted it in the car. Call audio comes through the car speakers.

To hardwire the charger in you need step the voltage down from 12v to the needed 5v. I took a live and earth from the back of the stereo, took apart a usb cig charger and soldered the cables into it, put it back together and hid it behind the dash. Then just took a mini usb cable from that up to the 3in1 plugged into the phone.

SRSWOWHD cleaned my sound up considerably using Pocketplayer.

[t.gilbert]

Well, my experiences so far,

Got the HTC YC A200 cable

1) Playing music through car stereo works great
2) GPS works fine most of the time, still not sure what the problem is, mainly voice directions not working properly all the time
3) Charging via the cigarette lighter socket, still got to hard wire the charging

Latest development

Got a Nokia car kit mic, just had to trim the locking lugs off the 2.5mm (or is it 2mm) jack plug. The mic works fine and the caller can hear me ok. The sound comes through the stereo but is not as loud as the music but i can change this slightly by fiddling with the plug, gets louder or quieter but still not the same volume as the music.

Any ideas? Would it be that the HTC adaptor is expecting the htc wired headset?

[tstruzik]

Finally solved the alternator whine / hum over at my place too. Key is to take the power for the charger directly from the power feeding the car stereo. That way both the stereo and charger reference the same ground which eliminated the ground loop and thus the alternator noise.

http://www.jenrathbun.com/phpBB3/viewtopic.php?f=17&t=26&p=76#p76