1. Download our Official Android App: Forums for Android!

General Eris 3.5 mm jack pinout - headphone problems

Discussion in 'Android Devices' started by rocketman3746, Feb 19, 2011.

  1. rocketman3746

    rocketman3746 Lurker
    Thread Starter
    Rank:
    None
    Points:
    5
    Posts:
    2
    Joined:
    Feb 19, 2011

    Feb 19, 2011
    2
    0
    5
    Does anyone have a confirmed pinout for the 3.5 mm jack on the Eris? I have found conflicting information elsewhere. Some sites say one way, some say the other. Obviously it's going to either be:

    Option #1
    1 - Tip - Left
    2 - Ring - Right
    3 - Ring - Ground
    4 - Sleeve - Mic

    Or

    Option #2
    1 - Tip - Left
    2 - Ring - Right
    3 - Ring - Mic
    4 - Sleeve - Ground

    I have an iPhone compatible headset with mic and volume controls (Skullcandy 50/50), and it seems that if the Eris was pinned like option 1 above, it should work since it's pinned the same as the iPhone. But the mic doesn't work and I'd like a little confirmation before I go and order an adaptor that will switch pins 3 and 4. Any help would be appreciated!

    ps - I'm not expecting the volume controls to ever work, but it would be nice if the mic did.
     

    Advertisement

  2. Frisco

    Frisco =Luceat Lux Vestra=
    Rank:
    None
    Points:
    1,343
    Posts:
    22,478
    Joined:
    Jan 19, 2010

    Hello Rocketman.

    I don't know the pin map on the Eris jack yet, but I have a co-worker who uses a Radio Shack Auvio headset with mic successfully.
     
    rocketman3746 likes this.
  3. manderle

    manderle Well-Known Member
    Rank:
    None
    Points:
    38
    Posts:
    216
    Joined:
    Jan 21, 2010

    Jan 21, 2010
    216
    23
    38
    NC
    I use a iPhone compatible set of earbuds with mic and it works just fine. It doesn't have volume control built in.
     
    rocketman3746 likes this.
  4. thrawn86

    thrawn86 Android Enthusiast
    Rank:
    None
    Points:
    68
    Posts:
    512
    Joined:
    Aug 3, 2010

    Aug 3, 2010
    512
    33
    68
    Miranda
    right. 4 has to be ground since thats standard for headsets. lots of devices like camcorders or those old archos boxes and nonstandard grounds so 'normal' headphones wouldn't work.

    Some devices use small capacitors in parallel with the mic so less/more sensitive ones may not work. apple does this with resistors on their newer connectors for the express purpose making older connectors useless.

    thats just a guess, though. you're right it has to be pinned the same otherwise it either wouldn't work period, or you'd only get one channel (tip/left).
     
    rocketman3746 likes this.
  5. offanairplane

    offanairplane Android Enthusiast
    Rank:
    None
    Points:
    68
    Posts:
    550
    Joined:
    Aug 17, 2010

    Aug 17, 2010
    550
    40
    68
    TX
    I am fairly sure it goes like this.

    Tip = Left
    R1 = Right
    R2 = Common
    R3 = Mic


    The only thing I am not 100% sure of is the Left and Right might be backwards, but that's not a big deal.

    I use an iPod cable to hookup my Eris to my wired handsfree system in my car.
    I've used the same cable for my buddy's iPhone and it worked as well. I think that is a pretty standard pinout for phones.

    This is the cable I use.
    http://www.amazon.com/Macally-Audio-Video-Cable-classic/dp/B000GGQ2ZU/ref=sr_1_10?ie=UTF8&qid=1298470270&sr=8-10

    I've even used the same cable on my old 5th Generation iPod Video, and it worked. The only difference was R3 was a video out instead of a mic in. But the audio out was the same.

    Oh, and I've used this setup with a couple of LG feature phones that had 3.5mm jacks, and audio and mic worked perfectly on those phones too. I think this is pretty standard. There might be some exceptions to the rule, but I believe this is the rule.

    Remember that you can use a standard headphone TRS plug in that same jack and it works. In that case, the mic (sleeve) would just be shorted to the third ring, the ground, telling the phone that you are using headphones versus a headset. And it can tell the difference.
     
    rocketman3746 and bberryhill0 like this.
  6. rocketman3746

    rocketman3746 Lurker
    Thread Starter
    Rank:
    None
    Points:
    5
    Posts:
    2
    Joined:
    Feb 19, 2011

    Feb 19, 2011
    2
    0
    5
    Thanks for all the replies. I still can't figure out why, but it sounds like I screwed myself by getting headphones with volume control. Not sure why they are different. I even purchased an adapter from kVconnection that switched the ground and mic pins, which seemed to make the mic work, but the audio sounds out of phase now. I'm going to pin out the adapter and see what they did. But from what manderle says, it sounds like I don't even need the adapter. I just need to stay away from headphones with volume controls... I wish there was a way to hack the headphones to bypass the volume controls. Might be time to do some brain surgery...
     
  7. groovydad

    groovydad Lurker
    Rank:
    None
    Points:
    5
    Posts:
    1
    Joined:
    Jun 9, 2011

    Jun 9, 2011
    1
    0
    5
    UK
    On my iPhone 3GS & 4 the sleeve is Ground Return for the L/R earphones, and therefore the electret mic was discovered on the next ring (R2) assuming the nomenclature Tip (LHS ear), R1 (RHS ear), R2 Mic, Sleeve (Gnd). The iPhone used the electret mic current to switch out the internal (iphone) mic and earphone over to the headset parts. I found a 10Kohm did the trick. I seem to remember that the R2 mic connection was -ve and not as expected.
    However the Samsung headset supplied with the Galaxy TAB and the Galaxy S has just a mic and a push switch (no volume controls) and I have established that the earphones are returned to R2 and the mic is on the Sleeve ie the reverse to the iPhone headset. The push switch (momentary) places 100ohm across R2 and the sleeve (presumeably for call control, etc). This will also mute the mic during the press function.
    Hope this helps someone out there!
     

Share This Page

Loading...