Instructables

Bluetooth Headset Hack

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My mum wanted to play some music from my desktop computer on her stereo(which doesnt have usb support but has stereo jack audio input) - and I was looking for reasons to hack stuff.
so i took  old broken bluetooth headset (that my ex broke...bla bla ) and  hacked it to include a stereo jack - and now she just plugs it in and plays the tunes(audio streaming) :)  

Future improvements:
1. Write a computer program to include voice control so she can just change music or switch of the computer off from her room using a voice command.
2.Hack the stereo to charge the bluetooth headset without unpluging it. (she probably wont let me do that lol )
 
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Step 1: Schematic

Picture of Schematic
This is the circuit diagram

Step 2: Items needed

Picture of Items needed
You are going to need: 
1. Bluetooth headset 
2.Stereo jack(3.5mm)
3.Soldering iron and wire 
5.Hot glue gun 
4.Thin wire 
5.General tools - e.g wire stripper 

Step 6: ...

Solder two wires to the stereo jack
- bridging the top 2 connections for left and right(black wire ) - then ground wire on third connection (white wire)

This is because the bluetooth headset has only two wires(mono output instead off stereo left and right ) 
*You might also want to snip off the microphone wires for privacy - but I didn't because I actually need that microphone for future hacks 
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tshaw148 months ago
great idea, did it with a stereo set I got at the discount store, works great. hooked them up with rca jacks instead so it would plug into my vintage stereo. I love bringing the 1960's and 2013 together.
dex3844 (author)  tshaw148 months ago
nice, glad you could use my idea :)
dmarinho11 month ago
rseth14 months ago

the Bluetooth is connect as only voice in desktop and mobile both. it wont play through that bluetooth . any solutions?

If you are using Android try the "BTmono" app. It will spoof media audio as voice audio and allow it to play through the headset. The sound won't be much better than phone call quality, though.

dex3844 (author)  rseth14 months ago

hi, try another headset and see if that plays - and what headset do you have by the way ?

d-instructor5 months ago

dex - I have a stereo BT headset and would like to hookup a stereo jack to it so that i can use this to plug my stereo and also use this BT headset as usual when not in use with stereo. Please help.

dex3844 (author)  d-instructor5 months ago

which stereo BT headset do u have ?... you mean like some sort of way to remove the stereo jack when you don't need it /

d-instructor5 months ago

I had this idea in mind and I am glad you did this to reality.

There are 3 major benefits of this idea:


  1. You can turn your desktop/laptop/cellphone to play music wirelessly on other stereo speakers (with audio jack) once BT paired wit this device.
  2. You can turn your car stereo into BT stereo.
  3. Those who would like to play music wirelessly using their android smartphone can use 'BT mono' android app.

Great job and nice gift for your mother! please don't forget to post your next idea to program this for voice control and charging the device :)

dex3844 (author)  d-instructor5 months ago

thanks glad you liked it :)

dex3844 (author) 7 months ago
nice, so yours is stereo..which bluetooth speakers did you use?
muddog157 months ago
I am going to hack my Bluetooth speaker bar this way only I am going to have a cable coming off of it and have a switch to turn off the internal speakers on the sound bar.
muddog157 months ago
I just keep mine plugged in all the time so it doesn't drain the battery.
muddog157 months ago
I used RCA as well.
Pesoen1 year ago
In the headset, wich wire goes with the black wire of the stereo jack? the red one or the black one?
dex3844 (author)  Pesoen1 year ago
Since the headset is mono - it doesn't matter - the black to black or the other way round will work the same
Pesoen dex38441 year ago
Thanks man! now it's working fine! This guy it's a genius!
dex3844 (author)  Pesoen1 year ago
no problem - glad I could help :)
Pesoen1 year ago
And the the "bridge" is just soldering one wire to each conection and then soldering both to another wire?
dex3844 (author)  Pesoen1 year ago
yes it is - its just effectively making the connections into one
so i did it and it doesnt work only because my phone wont find it as a media player. it only works for the actual headset. any ideas about that?
why would your phone see it as a media player. It is simply a "bluetooth speaker". connect it exactly the same way as you would connect a headset over bluetooth, only instead of the headset producing the sound, you are having the headset pass sound into your stereo Aux port.

If the complaint is that after you connect it, your music does not come out, then that is a setting (or even limitation) of your phone. Phones expect a "headset" to be used for phone calls, not music, and may not even support playing anything other than phone calls through them. check your phone settings and see if there is an option for "primary sound device". If not, your phone will only understand how to send music through something it understands as headphones, the headphone jack, or an A2DP bluetooth device (stereo bluetooth for music).
dex3844 (author)  tylermthehippie1 year ago
great that it works to begin with but i dont know of a way to make your phone detect it as a 'media player' - sorry cudnt help you there but you could always use your computer :)
Gomex191 year ago
Amazing idea, glad to see it worked for you and other people. But if you make that 3.5mm Male into a 3.5mm Female, you can plu ANY headphones you want into it or you can put a small aux cable into it to get the same effect you have ^.^ just saying
dex3844 (author)  Gomex191 year ago
In theory it should work fine, but the sound level and quality would be affected more because of the increased resistance of the headphones or the aux cable- but that could be fixed by having a better bluetooth headset and adding an amplifier for the headphones,: still gud idea though and glad you like it
ashokaji1 year ago
pls help me how to send files without internet to a long distance
dex3844 (author)  ashokaji1 year ago
How long of a distance are we talking
Very cool! Great idea! LOVE IT! Thanks!
Jr.20122 years ago
So if my pc doesn't have inbuilt bluetooth I would follow all these steps but with the bluetooth dongle then make another one for a stereo but with the stereo jack? Sorry if this sounds like the dumbest question but I dont know how the pc would stream your music to the stereo.
thanks in advance
dex3844 (author)  Jr.20122 years ago
na its not a dumb question... and if u connect the dongle ..streaming settings should appear in volume control options (wat operating system do u have ?)
Jr.2012 dex38442 years ago
I have windows 7.
dex3844 (author)  Jr.20122 years ago
bluetoothheadset streaming option should be in sound controls under playback :)
Great! Can the headset be also used as audio input to the PC? Say, for an electric guitar? :P
dex3844 (author)  ianmartorell2 years ago
yes ofcourse...but theres the issue of sound quality ....
Really? How much worse would it be? Guitar jacks are mono anyway
dex3844 (author)  ianmartorell2 years ago
depending on the headset..since the guitar is mono too i reckon its not that bad anyway
Irwind Kee2 years ago
done, i use for my car.... its great
DSC00897.JPG
dex3844 (author)  Irwind Kee2 years ago
great :) - ur headset stereo ?
no.. its mono, just for picking up the phone. this thing help me a lot when i was driving and much more better than before
shad0w192 years ago
great..........
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