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What do you know? There is another wire there. I don't see it connected anywhere though. One could be the ground for the USB jack's body. Like on the Alien DAC, there are four connectors on the USB jack, but the casing has to also be soldered to ground as well. I believe the one soldered to pin 16 is the ground connection for the information side of the USB, but also the black wire could be the body ground.
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Haha! That's my improvised dock! I can't remember clearly now. But I know there were 2 grounds I had to solder to... I think it's the USB ground and just the uhhh ground from the iPod i think, forgot already, but I'm quite sure there are 2 grounds to solder to
I see four conductors. Pin 16, the brown wire, is USB GND, so it makes sense that he uses it.
And while plugging the iPod into the computer via USB does send it into docking mode, you can eject the iPod through iTunes so that the USB still provides voltage to the iPod, allowing it to charge. That's one possibility. The other is that he uses a wall wart that adapts to USB instead of the Firewire ones that used to ship with iPods. Those cost a pretty penny, but it's still a possibility.
i c... but why my DIY data cable STILL didn't work ? what pins to use for USB cabledata anyway ?
Originally Posted by powertoold
Isn't the black wire the USB GND wire? If you look at the picture, you can see the black wire behind all the others.
but 1 ground for USB cabledata is enough, isn't it ?
Originally Posted by joneeboi
What do you know? There is another wire there. I don't see it connected anywhere though. One could be the ground for the USB jack's body. Like on the Alien DAC, there are four connectors on the USB jack, but the casing has to also be soldered to ground as well. I believe the one soldered to pin 16 is the ground connection for the information side of the USB, but also the black wire could be the body ground.
Originally Posted by KoKoKrunch
Haha! That's my improvised dock! I can't remember clearly now. But I know there were 2 grounds I had to solder to... I think it's the USB ground and just the uhhh ground from the iPod i think, forgot already, but I'm quite sure there are 2 grounds to solder to
Is it possible to make a dock connector that only connected to the USB power, USB ground, and the line out pins to be able to play music while the iPod is charging? I don't care about the syncing ability. All I want is to be able to make the iPod like a standalone music player without worrying about the battery life.
I assume you would need 5 wires: GND, R, L for audio and GND, 5V+ for power. Looking here, those would be 2, 3, 4 for audio and 16, 23 for power respectively. Anyone correct of verify me freely. (I'm sure you could easily google "DIY ipod charger" and figure the charging bit out...but I gotta run out..)
P.S: The audio GND and power GND are not internally connected, and should be kept isolated! ie, don't mix them up or interchange their use.
The picture jonee used of the audio line out cum USB charge connection was the one that I did DIY-Universal Dock Adaptor!!! The BADock!!! And yes there are 5 pins you have to solder to...
@ powertoold: If you want that, you need to get an external charger dock. That's what I do.
vvs_75:
thx mate, i already use that pins BUT after it finish, i test connect it to PC and pair to my nano...whenever i plug it to PC comes a pop up says "USB device not detected" or something like that...it happens all the time... what have i do wrong ?
KoKoKrunch:
yup, that my "not cheap" wall charger are just like yours BADock...the 30 pins connected to 1 pcb inside the dock...
but why my DIY data cable STILL didn't work ? what pins to use for USB cabledata anyway ? 
what have i do wrong ?