Does anyone have the iPhone LOD pinout?

[joneeboi]

I tied pin 11 to ground and put in a 390K resister on pin 21 (it measured about 380K on my cheapo DMM. Close enough right?) and music didn't stop coming out of the speaker like it does with my grounded-pin-11 LODs. I'll try that 1k resistor again if you say it worked. It hasn't worked for me before, but I'll give it another shot anyway.

 

[AnalogArsonist]

Quote:

Originally Posted by joneeboi /img/forum/go_quote.gif I tied pin 11 to ground and put in a 390K resister on pin 21 (it measured about 380K on my cheapo DMM. Close enough right?) and music didn't stop coming out of the speaker like it does with my grounded-pin-11 LODs. I'll try that 1k resistor again if you say it worked. It hasn't worked for me before, but I'll give it another shot anyway.

It's just baffling no one that has figured it out is publishing it...I didn't want to rip apart my dock but I might have to. It's such a pain to get open and I felt like I was breaking something so I stopped last time.

 

[AnalogArsonist]

OK, well the 375k resistor to ground off of pin 21 didn't allow line-out. As soon as I float the 21-pin though, the audio switches to LOD but then the accessory message pops up. I wrote an email to Apple and we'll see what becomes of that.

 

[joneeboi]

It must have something to do with the the "Made for iPod" and "Made for iPhone" certifications.

 

[CptanPanic]

I just found this thread, and want to encourage all participants. I have been wanting to buy a car charger/line out adapter since the iphone came out, but to no avail. So I hope you guys can find out how to get line out without "accessory warning"
Thanks,
CP

 

[AnalogArsonist]

Captain: you can still use the line out on the iphone, you just have to leave the accessory pin floating. You will get the warning but the music won't stop playing.

 

[stokessd]

IF you guys are interested in the car dock side of this 3G iPhone issue, I'm currently modifying a $7 Dension IceLink to also charge the iPhone 3G. You can read the saga here:

Sheldon’s World: Things that interest me…


As for the accessory warning, I suspect that it's tied to the resistance on pin 21. The problem is that for the ice-link serial control to work, the resistance on that pin needs to be 500K. So I think I have the choice of the annoying warning or head unit control. I'll take the head unit control. BTW, the dialog goes away after a few seconds.

Hope this info helps you guys.

Sheldon

 

[ruZZ.il]

Quote:

Originally Posted by UglyJoe /img/forum/go_quote.gif Has anyone confirmed that tying pin 11 to one of the ground pins in the LOD will activate the LOD for the second gen iPod touches?

**SECOND GEN IPOD TOUCH TESTED**

Following other recommendations here, I tied pin 11 to pin 30, and that to pin 11 via a 1k resistor. It works perfectly on a second gen ipod touch (briefly tested, successfully, on first gen too). Inserting the dock routes audio output from either the speakers or the headphone out, directly to the dock. Removing the dock pauses playback and goes back to previous state on play . No messages/errors/etc.
This is old news.. just a clarification.

 

[sugrhigh]

I've been following this thread pretty closely as I have an iPhone I'd love to have higher quality sound on but this is the first time I have anything to contribute

anyway, I found this "thread" (it's really only one post) and he says his bluetooth audio adapter that I will assume is "iPhone certified" had a 95k resistance between the accessory pin (21) and ground.

will someone try this and let us know how it goes?

also, how does the line out signal compare to say the iMod/diyMod?

 

[apanossi]

I just tried the mod described by ruzz.il on my iPod car integration device that I currently have. The solution works for my iPhone 3G to route music through line-out but I still get an accessory nag message. Also, I use the Scosche adapter to get charging function for my iPhone 3G. Can anyone describe what wattage they use for the 1K resistor? I used a 1/8 and a 1/4 amp and both seemed to work but I'm wondering if this detail is creating the nag screen message.

 

[joneeboi]

Quote:

Originally Posted by sugrhigh /img/forum/go_quote.gif anyway, I found this "thread" (it's really only one post) and he says his bluetooth audio adapter that I will assume is "iPhone certified" had a 95k resistance between the accessory pin (21) and ground. will someone try this and let us know how it goes? also, how does the line out signal compare to say the iMod/diyMod?

I'll give it a shot tonight and see how it goes.

Quote:

Originally Posted by apanossi /img/forum/go_quote.gif Can anyone describe what wattage they use for the 1K resistor? I used a 1/8 and a 1/4 amp and both seemed to work but I'm wondering if this detail is creating the nag screen message.

It shouldn't make a difference. All the iPhone will see is the resistance between the pins.

 

[joneeboi]

95K resistance didn't work. I tried it with pin 11 grounded and not grounded. The music stopped and the message came up only when 11 was grounded. When pin 11 wasn't grounded and the 82k and 12k resistors were connected from 21 to ground, the music didn't stop.

 

[fakcior]

I have a question. How should I connect LOD's pins and resistor to proper work with iPhone 2G (with no messages?)

Regards

 

[ruZZ.il]

join the experiment

 

[qusp]

Quote:

Originally Posted by sugrhigh /img/forum/go_quote.gif I've been following this thread pretty closely as I have an iPhone I'd love to have higher quality sound on but this is the first time I have anything to contribute anyway, I found this "thread" (it's really only one post) and he says his bluetooth audio adapter that I will assume is "iPhone certified" had a 95k resistance between the accessory pin (21) and ground. will someone try this and let us know how it goes? also, how does the line out signal compare to say the iMod/diyMod?

that depends on what quality caps you are using for DC coupling. if using backgates in an LOD the difference is quite noticeable but not HUGE, because the iphone 3G actually has a brilliant lineout IMO; if using with a quality larger capped dock the difference is substantial... very substantial