Database Users

mini plug on headphones

I'm hoping to get some headphones for listening to MP3s on the JAM. Rather than modify the original pair, I'd like to get some which retract into a reel. I know there are some available which have 2.5mm mini jacks on them, but I'm worried that they won't work with the JAM.
To test the water, I've tried a standard stereo 2.5mm -> 3.5mm adapter (from MAPLINS) and found that it doesn't work quite right. The left channel comes through fine, but the right channel seems to be a mix of both left and right. I figure this is because the normal stereo plug actually shorts out two of the connectors on the JAMs socket (which has an extra connector presumably for the MIC?)
Soes anyone here know how these 4-pole sockets work? Are they standard across phones? Is it possible to buy a 4-pole 2.5mm plug and then solder that onto a different pair of headphones? (I can't seem to find 4-pole 2.5mm plugs anywhere...)
If we can figure this out, I'm sure it'd be very useful info for all those JAM users out there...
Cheers!
Simon

I already replied in the compact Jam forum.
http://www.compactjam.com/forum/forum_posts.asp?TID=258&PN=1
Matt

Try this...
http://www.expansys.com.au/product.asp?code=113091

Replacement for Mini Headset

I'm looking for replacement for Magician's (wired) headset coz I think the one that comes with it sucks (low audio quality).
Anyone can suggest good alternatives with good MP3 quality (enough bass,...) and also as the phone's handsfree.
Thanks a lot.

If you are handy with a soldering iron, cut off that stupid pair of earbuds and solder on your favorite headset (that's what I did) or you can buy 3rd party adapters. If you solder on new headphones, don't forget to get some of that really cool heat shrink stuff to put over the wires, it turns out very professional looking and very strong.

Hmm...nice idea.
Unfortunately i'm not good at soldering.
So it seems i'm stuck with alternative to find a good earphone+hansfree combo....

SOny Ericsson p900 headset
5x times sound quality, + only one with a microphone that fits the 2.5mm plug. I searched long and hard to get this answer as i cannot solder too

this headset is not a stereo one, rigth ?

There are some adapters that have a built in mic and you plug the 3.5 headhones of your choice into it. There is also a small adapter that is just for audio 2.5-3.5. It is true that the Sony P800-900 headsets are compatible with the Jam. Unfortunately I have yet to hear original earphones that are acceptable to me. I can't remember where I bought it, but the adapter with a built-in mic and 3.5 headphone jack is probably what you are looking for. I use one in my car. Maybe somone has a link for you?

Link herehttp://www.pocketpctechs.com/detail.asp?Product_ID=PPCPADPT11

Link herehttp://www.pocketpctechs.com/detail.asp?Product_ID=PPCPADPT11
Click to expand...
Click to collapse
But in this case, is there any high quality 3.5mm earphone that also work as handsfree for the Jam?

This solution uses the internal mic of the PPC Phone so you can use any high quality headset from your local hi-fi store.

Can you confirm that this doesn't mess up the stereo or do anything else weird?

I found it! This is the adapter that I bought for my Sony P800 years ago(works with Magician). You can use it to plug into your home stereo, favorite headphones and it even has a volume control. Mainly I use it in my car. I use it to plug my Jam into my car stereo and sometimes I use it to plug in the earbud for one ear wired headset communication. ENJOY!
http://pc-mobile.net/sp8aa.htm

I have that. I don't like it too much since it feels very fragile (including the thin wire) and the fact that it isn't a simple straight wire means it snga everywhere.

I only use that adapter in the car. It is good for people that can't make their own headset by soldering. I made a custom headset from Koss headphones and a Sony handsfree. That baby sounds really good, and I'm picky about sound quality.

Does the mic work? Can you accept and end calls using the button?
Thanks,
K

Yes, the above adapter works exactly as the original handsfree headset (+ volume control) except that you have to plug in a normal 3.5 plug stereo headphones. If there are other models out there without the reel thingy, I haven't found it.

Wiring diagram for headset

Does anybody know the wiring diagram for the supplied headset?
Wolfgang

Sorry wolfgang, this is just a bump and not an answer. I'd also like to know if anyone's investigated the headset. What I'd like to be able to do (and I've never even *seen* the headset yet, still stuck in the hell of trying to obtain an Exec, see other threads) is use the microphone / button from the headset with a different pair of headphones.

I assume you mean the plug wiring? I've not had time to double-check this yet, but I believe it's the same as my Jornada 928 mic/stereo-headset.
Reading from the tip of the plug:
Plug tip: Left ear piece (short cable on the Jornada)
1st ring: Right ear piece (long cable on the Jornada)
2nd ring: Microphone
Top ring: Ground
When it arrived, I briefly tried the Jornada headset in the O2 Exec, and it worked in both ears, but I didn't check the left/right orientation. Until my Jabra BT500 bluetooth headset arrived, I was also using a self-modified (re-plugged) Plantronics single-ear headset with the tip and 1st ring linked to give mono, and that works without problems.
I suspect the standard headset shorts one of the signal lines to ground to give the answer/end function, but don't know which one.
HTH

Hey Astage can you tell me the Headset you using with single headset?
I am not heavy music listener, and I want a wired headset with single speaker ...
I will check plantronics sites also...
Please update me with the model which works fine with Wired Single Headset.

dont forget that you can use completely normal headphones in the Jasjar, this means (as posted Astage) meaning the ring that is the odd one out, compared to normal headphones, is used for both the Mic and the button. If nokia's are anything to go by the button will switch in a resistance of a certain value to indicate it has been pressed (this is because if the Mic is a coil mic it will already read as 0 ohms, a straight short to ground)

Mniko: Unfortunately this will not help you - I have the Plantronics M130 - however, as I said, I had to wire a different plug onto it.
The problem is that most single-ear headsets come fitted with a 3-ring 2.5mm diameter plug, wired as:
Plug tip: Microphone
1st ring: Ear-piece
Top ring: Ground
The Exec/Universal and other microphone+stereo headsets seem to use a larger 4-ring 3.5mm plug wired as per my earlier message. Because of the different wiring for the microphone signal you cannot just use a 2.5 to 3.5mm converter - even if you can find one. The situation is made worse if the headset (e.g. Plantronics) has a microphone sensitivity switch built into the plug, as you may need to also transfer this into the new plug.
Ice_coffee: Thanks for the update - saved me having to cut mine open.

yes I understand.... the prob is 2.5 & 3.5mm... I dont think any headset available around 3.5mm with mic and single headset, that made me to cut off the second speaker, which I already did...
I found one on http://pc-mobile.net/pxdaa.htm
But they dont seems to have it anymore... I really wonder how come HTC didnt thought of it... after all universal is a phone to rite?

Ok well, using my multimeter and some maths I figured out that
1) Under normal circumstances the jasjar sees the mic as a 1000 ohm load
2) It knows when you have pressed the button because the load drops from 1000 ohms to a mere 45 ohms
3) you could acheive this by putting an 47ish ohm resistor on a switch in parallel with the mic, using this info you can construct a working headset from almost any headset on the market, most notably the many many headset/mic combos available for PC's

Connecting phone to a car stereo

Hi all
I have a MDA compact which I wish to connect to my car stereo as a handsfree unit. I have an auxiliary input for my stereo.
Is it possible just to purchase a 2.5 to 3.5mm lead for this? I have a gut feeling the mic won't work - please help? Is it possible to buy such a lead with a built in mic?
Thanks
Carl

Hi, I used to have a XDAII which I connected to the auxillary port on my car stereo, just like you suggest. It worked perfectly. When using the phone, the caller's voice woudl come out of the car speakers and the mic was powerful enough to pick up my voice even though the unit was mounted on my windscreen.
Unfortuntely, both the Wizard and the Exec automatically disable the mic when you plug into the headphone socket. Not sure about the MDA comact. Sorry couldn't offer more advice on your particular device, but I hope my experiences help.

monster said:
Unfortuntely, both the Wizard and the Exec automatically disable the mic when you plug into the headphone socket. Not sure about the MDA comact.
Click to expand...
Click to collapse
I do have the same setup. I can confirm U the mic still work after U plug in the adapter but I normally use a BT headset when I am in the car.

OK, so I assume that if I purchase a 2.5mm to 3.5mm lead, the mic should work?

carlreader said:
OK, so I assume that if I purchase a 2.5mm to 3.5mm lead, the mic should work?
Click to expand...
Click to collapse
Yes. 8)

OK - did some work on this.
I decided to cut the earplugs off of the supplied headset, and attach a 3.5mm socket.
I now have a custom XDA mini lead
All works, however volume from car stereo speakers is extremely low. Any ideas? (Yes, I have checked car volume, phone volume and headphone volume!)
Cheers
Carl

jackleung said:
monster said:
Unfortuntely, both the Wizard and the Exec automatically disable the mic when you plug into the headphone socket. Not sure about the MDA comact.
Click to expand...
Click to collapse
I do have the same setup. I can confirm U the mic still work after U plug in the adapter but I normally use a BT headset when I am in the car.
Click to expand...
Click to collapse
Hi Jackleung, my mic is being diabled, and i am beginning to think that I may not have the right connector. I have a standard 3.5mm connecting the exec. Can you let me know how you have wired your device with the type of connector? You may be able to solve a longstanding problem of mine.
Thanks in advance.

I found my mic was cancelled with the Mini, hence the custom cable.
hope this helps!

monster said:
Hi Jackleung, my mic is being diabled, and i am beginning to think that I may not have the right connector. I have a standard 3.5mm connecting the exec. Can you let me know how you have wired your device with the type of connector? You may be able to solve a longstanding problem of mine.
Thanks in advance.
Click to expand...
Click to collapse
I think my adapter is just a standard 2.5mm to 3.5mm converter. I tried 2 different adapter (one from Radio shack and the other one from ebay: http://cgi.ebay.com/USB-CABLE-headp...ryZ15040QQssPageNameZWD1VQQrdZ1QQcmdZViewItem)
Both are working for me (I will try again today and confirm U tomorrow), therefore I think yr problem is in the exec hardware itself.
To Carl,
Yr setup will not work since yr supplied headset adapter has at least 4 connection on the plug compare to 3 on the standard one. The extra connection is for the mic. If U cut the wire like this:
<---- X --- mic+volumn control ------ ear plugs
Then U can no longer use the mic w/ the custom wire. But if U:
<------- mic+volumn control -- X ---- ear plugs
then the mic on yr mic+volumn control will pick up the voice

hi jackleung
Thanks for the reply - the lead was cut after the mic but before the earphones.
This was because a standard lead with a 2.5 / 3.5mm adaptor didnt work.
My only issue now is the low volume!
Cheers
Carl

I tried it on my Imate Jam again. My mic on the Jam still works (eg: Voice Command via Cyberon Voice Dial. So do phone conversation) even I use my 2.5mm/3.5mm adapter to connection it to my car stereo.

Hi,
I did the same for me and a friend of mine with a Univer..er - Jasjar and connected this to an FM transmitter - We have excellent sound quality, volume and the you can still answer calls by pressing the Mic Button
Frikkie
(If you are gonna be late - dont rush, else someone else and YOU will be cross)

check connections?
I have done exactly what you did, put a 3.5mm socket on the end of the included handsfree cable.. volume is fine, and i regularly connect it to the aux in the car, and multiple sets of headphone/speakers...
The best suggestion to your volume problem is to try again.. i know i had issue with the stereo channels getting screwed up (and even combined at one point) and it was just trial and error getting the connections clean..
You have to ensure that both the shaft and tip connectors on the socket are grounded to the shared ground on the circuit board.. otherwise the audio will probably be less than perfect.. check for dodgy soldering/connection.. coz i can assure you that your theory does work!
Dan

There is another topic on this here.
The person from there uses:
http://www.expansys-usa.com/product.asp?code=PPCPADPT02
which has two 3.5mm plugs.
Description: It has a 2.5mm plug at one end (this plugs into the PocketPC) and two 3.5mm sockets at the other end (into which you plug your 3.5mm headset or headphones).
My question was: could I put a standard 3.5 car kit mic into this 3.5 headset jack (the one with the mic)? Would the mic work if I plug it into a headset jack?
I assume the other one (headphones = stereo only) I will plug it directly into my car auxiliary via a 3.5mm to RCA cable, right?

8125 Audio Output Jack Problems?

I recently have gone through two different Body Glove Sport Stereo headphones with some issues. I can't decide if I have another faulty headset or if the phone audio connector is the issue. The body glove headset is similar to the headset that comes with the 8125, but it looked more comfortable.
The problem I am having is this, the headphones only play in the right side. Messing with the plug on the headset results in some quick burst of audio on the left side and pulling it out a tad gives me some faint left audio and the right side audio goes out completely. It seems the plug and jack don't quite jive... anyone else experience this? It comes with an adapter for the "bigger jack" and upon trying one of my girls iPods, they work fine with the adapter in the mix.
My application is this... I listen to MP3's while riding my motorcycle and the earphones that came with the phone hurt my ears after a while. Plus they don't have the greatest audio quality. Looking for a comfy replacement, but the above issue has me scratcing my head.

Here is a link to the headphones: here

i think...
i think you have the wrong adapter. i tried using the slvrs adapter with my 8125 and it did not work same prob as you. i went to radioshack and got one from there and it did. im most absolutely sure is the inner wiring. what happens is that there's also a connection for a microphone on the 8125 so some adapters dont work.
http://www.pocketpctechs.com/main~unit~Cingular_8125-559~area~accessories~item~PPCPADPT21.htm
ps my friend got a mono one at radio shack and it worked for him both sides. hes not a audiophile but you get the idea, it has to be the connection of your plug.

The headphones in addition to be being stereo, have the microphone too, I think the paragraph in the page you linked clears up a few questions for me:
Most manufacturers create their devices allowing audio compatibility with only their specific brand headset or headphones. We have designed and engineered several different types of audio adapters to accommodate a variety of devices. Our unique audio adapters give you the freedom to use any standard 2.5/3.5 mm. 3 conductor headset and/or your favorite set of headphones.
Click to expand...
Click to collapse
It would seem although the Body Glove headset uses the 2.5mm jack, the internals of the 8125 are off enough that a select few aftermarket stereo headsets with mics will work with the phone. Interesting.

Upon further examination of the jack, it is different than the one that came with the phone. In spite of the BodyGlove being a stereo headet with a mic... just like the one that comes with the phone, the connector is different enough to not with aftermarket stuff I guess. Those dirty rascals!!!
The connector on the left is the one that comes with the 8125, the one on the right is the BodyGlove.

Searched and found this old thread. I went to connect my 8125 Wizard to my cars 3.5 jack using a standard adapter and it only came left channel.
Is there a more cost effective proprietary four-conductor jack to a 3.5 mm converter than posted above at PPC Techs? I was hoping to spend a few dollars.

I'm actually using my old Ngages audio cable to get Stereo sound out of my car stereo. It works but sometimes I can't use the mic on the cell phone to talk.
When it works it's really cool, but otherwise I gotta unplug the cable and use it like a regular phone during phone calls.