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Does anyone have the iPhone LOD pinout? - Page 16

post #226 of 264

I am still learning about all of this. My first lod refused to work with my iTouch. I used 1-2 for audio GND; 3-4 for right and left; 11 was connected to 15 and that was connected to 21 with a 68kohm resistor. It worked on my gf's Nano but not on my Touch.

 

Also, when looking at the back of the connector with the top side up is it:

 

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29

(found at pinouts.ru)

 

or

 

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30

(found at http://www.head-fi.org/forum/thread/499986/diy-ipod-lod-cables)

 

I am using this connector from Qables: http://www.qables.com/shop/index.php?main_page=product_info&products_id=359&zenid=4475354db73523d147e0a1ff83fe1fca

 

My next lod should be a working one and I want to get this straight before I am going to build it. I think I used the wrong pins the first time; it's the only thing that makes sense.

post #227 of 264

Anyone?

post #228 of 264

Check the wiki - it has links to the original posts and some pictures that should help you figure out the orientation of the connector so you know what is pin one - on top or on bottom.

http://www.head-fi.org/wiki/diy-ipod-line-out-dock-pinout

 

and if its not clear, you can always edit it to make it more clear so the next poor bugger doesn't have to go through the same stuff you are...

post #229 of 264

Sorry if I totally missed it, but what is the wattage on the 68kohm resistor?

post #230 of 264

Finished my cable and used this pin setup:

 

Top of connector when plugged into iPod:

 

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30

 

I pulled all pins except 1, 2, 3, 4, 11, 15, and 21 out.

 

Connected 1 and 2 = Ground

 

Pin 3 = Right channel

 

Pin 4 = Left channel

 

Connected 11 and 15 together = soldered one side of the resistor to it

 

Pin 21 = soldered other end of resistor

 

Works fine on my iPod Touch 3g.  I've read there is a way to not use a resistor but I went this route to be sure.  BTW, I used a 68k ohm 1/2 W resistor for this. 

 

DSC00385.JPG

 

DSC00407.JPG

post #231 of 264

1/2w might be large to deal with. You could go with just 1/8w.

post #232 of 264

Well I never could find out or get a response which wattage to use.  So I went with the biggest one I could fit in the connector comfortably. 

post #233 of 264

it doesnt carry any current at all, only a logic level signal pulling the pin up to a reference voltage through a resistor divider to tell the iphone its good to go. you could get away with the smallest resistor you can find

post #234 of 264

Also if you ever want to screw around with the ipod connector

 

http://pinouts.ru/PortableDevices/ipod_pinout.shtml

post #235 of 264
Quote:
Originally Posted by qusp View Post

it doesnt carry any current at all, only a logic level signal pulling the pin up to a reference voltage through a resistor divider to tell the iphone its good to go. you could get away with the smallest resistor you can find



Now you tell me!  tongue.gif

post #236 of 264

Also to avoid having to put your device into airplane mode you can add a rf choke to the end of the cord that plugs in to your amplifier. The closer to the amp the better. A rf choke is a ferrite ring that you pass the audio signal lines through and it is a inductor that inhibits the high frequency of the GPRS waves but allows the audio frequency to pass through. You could simply steal one from an existing cord or buy one at radio shack or the like. I got mine from a dead playstation controller. run the line through it and wrap it around once over to make a loop and bye bye buzz noise.

post #237 of 264

Anyone tried line in?

I bought a PodBreakout board and tried soldering jack connectors to the line in pins (connecting the ground to pin 2, as I did with line out):

 

http://www.kineteka.com/PodBreakout-v1.aspx

I tried it on my iPod Touch 3G and it worked, for awhile. But, when I tried it again it didn't.

Also, I couldn't record the incoming signal, I just heard it in my headphones.

 

I didn't use a resistor between pin 1 and 11 and it seems to work fine without any error messages.

 

Thoughts anyone?

post #238 of 264

anyone else finding iphone v4 to be pickier wrt the exact resistor value? i've had 2 occasions recenetly where i've run out of my normal small 68k0 and had to use 68k2 and finding i'm getting errors, still works, but save old annoying message, same cable works fine on 3g and ipad. i have more resistors on the way, but previously i have used anywhere between 66-69k in a pinch with no issue. edit, i may be mistaken how high i have used before

 

edit: 66k8 was the lowest i used before, , i just tested by starting at 65 and adding 1k at a time, it starts working at 67 and stops at 68k2, so perhaps some of these weird errors i have seen people report in here could be caused by using really cheap low tolerance 68k resistors  that are in actuality 68.5-69k. i'll find time at some point to run through adding 100r resistors, or did jonniboi do that already?


Edited by qusp - 3/21/11 at 11:03pm
post #239 of 264

I'm planning on making a DIY lod for my ipod classic (160GB, newest version, using it with FiiO E5 amp).

 

I read in an earlier post that the resistor is only used to "fool" the iphone into accepting the hardware.

In that case, do I even need a resistor in the cable if it's only for an ipod classic? (Therefore I'll only be soldering three wires to the grounds (1 & 2), right (3) and left (4) pins of connector)

 

Or if I do need a resistor, is there a specific resistor that someone has found to work well with the ipod classic?

 

Thanks

 

post #240 of 264

its the same resistor for all of them, there is no iphone, touch, classic resistor, something 67-68k will work on all of them. dont use 1 and 2 for ground, use 15, or 29, since this is your first lod its best to leave as much room as possible, so you dont cause any shorts. all of the grounds are connected internally in the idevice anyway. i would put the resistor in regardless, from memory at least one model classic needs it and you may as well have an lod that works on everything.

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