android
Prev Previous Post   Next Post Next
  #10  
Old 12-15-2007, 03:06 AM
rox rox is offline
Junior Member
 
Join Date: Dec 2007
Posts: 2
Default

I picked up a griffin dock on clearance for $5 at best buy and traced all the connections:

1 - power
2 - power
3 - ground
4 - usb d+
5 - usb d-
6 - ground
7 - power via 47k resistor
13 - ground
18 - ground
20 - ground
27 - audio tip
28 - audio ring
29 - audio barrel

additionally, the audio channels are run through a 22uf/100kohm rc network. this tells me that the connector audio out isnt true line level and they are faking it.

it appears the audio out is turned on by bringing pin 7 high. I think the resistor just serves as a current limiter.
Reply With Quote

 

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT -5. The time now is 11:29 PM.