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Picture of Bluetooth Headset Hack
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

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This is the circuit diagram

Step 2: Items needed

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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 3: Process

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Take the cover off  and be carefull with the small wires inside 

Step 4: ...

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strip of the casing of the stereo jack if needed to 

Step 5:

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Step 6: ...

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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 

Step 7: ...

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Make a small hole on the headset cover and insert the stereo jack then glue it on with hot glue 

Step 8: ...

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Solder the wires from the stereo jack to the headset wires 
be very careful because you might end up pulling the wires off like I did 

Step 9: ...

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Put the cover back and you have a finished product - tadaa!

Step 10: Finaly

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Plug in your headset to the input(female stereo jack) of the stereo
Turn it on and pair it to your computer
Play some music