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iTouch 3rd Gen Line Out Dock

post #1 of 28
7/1/10 at 3:23pm
Thread Starter 

I'm trying to make a LOD for my 3rd Gen iTouch. All I need to do is "connect pin 11 to ground (15/16) and then connect that using a 68k ohm resistor to pin 21" and get one of these from Qables: http://www.qables.com/shop/index.php?main_page=product_info&products_id=746&zenid=9e9dbd912c61bc0792f04562715fd3aa right? What should I use for an input wire/is there anything else I need?


Edited by Spartan117 - 7/2/10 at 5:14pm
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post #2 of 28
7/5/10 at 2:58am

That only makes the iPod 'sees' your LOD as an accessory. You also need the L and R audio out pins.

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post #3 of 28
7/5/10 at 11:24am
Thread Starter 

Pins 3 & 4 right? Anyone have a wiring diagram for me?

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post #4 of 28
7/5/10 at 12:40pm

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

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post #5 of 28
7/5/10 at 7:16pm
Thread Starter 

I meant wiring from the iPod connector to the 3.5mm jack itself, I already saw that, thanks.

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post #6 of 28
7/5/10 at 7:51pm

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


Edited by ccfoodog - 7/5/10 at 7:54pm
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post #7 of 28
7/5/10 at 10:38pm
Quote:
Originally Posted by Spartan117 View Post

I meant wiring from the iPod connector to the 3.5mm jack itself, I already saw that, thanks.


I'm not sure if I understood you correctly. You just wire pin 2 (G) to the sleeve of the 3.5mm plug. The same to pin 3 (R) to ring, pin 4 (L) to tip.

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post #8 of 28
7/6/10 at 10:23am

Check out my post here

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

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post #9 of 28
7/6/10 at 11:04am
Thread Starter 

Ah I see.

(11+15 or 16) -> [68K] -> (21)

(G) -> Sleeve

(L)  -> Tip

(R) -> Ring

Alright, I think I got it. Any idea if the connector I selected would be too small? I was thinking about switching to this one: http://www.qables.com/shop/index.php?main_page=product_info&products_id=557 however, I've seen many others use this one: http://www.qables.com/shop/index.php?main_page=product_info&products_id=359

 

I was looking at 24 AWG wires, so I'm guessing that's too small? Isn't 28AWG pretty standard?


Edited by Spartan117 - 7/6/10 at 11:10am
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post #10 of 28
7/6/10 at 2:46pm

Some people run audio ground to 15-16 -11

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post #11 of 28
7/6/10 at 6:55pm
Quote:
Originally Posted by Spartan117 View Post


I was looking at 24 AWG wires, so I'm guessing that's too small? Isn't 28AWG pretty standard?


24awg has larger diameter than that of 28awg...

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post #12 of 28
7/7/10 at 10:56am
Thread Starter 
Quote:
Originally Posted by rarebear View Post

Some people run audio ground to 15-16 -11

Pin 2 to all three pins (15, 16, and 11)? What's the reasoning behind it?

Quote:
Originally Posted by Lil' Knight View Post




24awg has larger diameter than that of 28awg...

Ehh sorry I didn't know, thanks.

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post #13 of 28
7/7/10 at 6:39pm
Quote:
Originally Posted by Spartan117 View Post

Pin 2 to all three pins (15, 16, and 11)? What's the reasoning behind it?

 


No need to jumper all of them because they are all connected internally in iPod's dock. Just one is fine.

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post #14 of 28
7/7/10 at 7:49pm
Thread Starter 

Okay, so:

(2+11+15) -> [68K] -> (21)

2 (G) -> Sleeve

3 (L)  -> Tip

4 (R) -> Ring

 

Will this work for the resistor?: http://cgi.ebay.com/100-pcs-1-4W-68-ohm-68ohm-1-Metal-Film-Fixed-Resistor-/120480322537?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item1c0d2fd3e9

 

Saw this at Mouser but didn't want to pay $7 for shipping: http://mouser.com/ProductDetail/Xicon/270-68K-RC/?qs=sGAEpiMZZMu61qfTUdNhGx2g6h6o0XudkZS%2f7qbPiAE%3d

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post #15 of 28
7/7/10 at 10:39pm

You don't need to jumper pin 2 and pin 11. Just wire pin 2 to Sleeve.

 

No, that resistor is only 68 ohm, not 68k ohm. Try Digikey if you want cheap shipping, they have USPS First Class option, which is usually less than $2.

 

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