biscuit (wishi_waspecial) wrote,

Wirless IR Headphone hack.


Headphones:


Transmitter:

So I got these things at Radio shack during a Christmas sale about 2 years ago for $15.00.
They were pretty cool to use, but not really conventional so I put them in a box and didn't see them for awhile... A couple months ago I came across them and decided that they could be used to play music from my computer on my stereo that is across the room.
This is the story of how I did it:

First thing first take the headphones apart and analyze what need to be done. I knew I needed to be able to plug the reciever into the wall (using a wall wart) and I also knew that I needed an outout (a mini-jack in this case)

Inside of right Head phone:


Inside of left headphone:


So To solve the problem of power I would need a 3 volt wall wart (2 AAA batteries = 3 volts)
I searched and search through my junk boxes and all over the house for a wall wart of the right voltage, but the best thing I could come up with was a 4.5 volt memorex one... I decided to take my chance and use this one... (It works fine)

Wall wart:


The batteries were wired in series (one in each side of the head phone) I soddered the positive and negative terminals from the left head phone together on the left headphone daughter board. (just added some more sodder between the terminals on the pcb) Then I soldered on the wires from the wall wart to the right headphone (making sure to match positive to positive and vise versa).

example:


Now that the problem of power is solved we have to add an output... To do this I cut a mini-jack off of an old dial up modem (If you don't know what a mini-jack is by now it is the same this you plug your headphones into on you portable cd player, or for you rich kids, your ipod). I desoldered the wires that went to the speakers and then put in new wires an ran them to the mini-jack. There are 4 wires, two of which are ground and two more of which are for the left and right channel.

Example:


Simplified wiring diagram for mini-jack:


There are two ir recievers (one in each ear) you want to make sure that you cut a hole in your new case for them to be glued in. The enclosure I used was an old plastic case from a 95 cannon laptop batterey... Ugly, yes, but it serves its purpous.

Iside entanglements of case:


I made sure to position the pcb inside my case so that I could acess the on off switch (I never turn it off tho). I turned the volume up on the receiver all the way before shutting the case. I also cut a hole for the power indicating led...

Side view:


I cut a hole in the back for the mini-jack outpt.

Back veiw:


Finished product:


It isn't pretty, but it is very nice having 250 watt surround sound system for your computer...

If you have any questions leave a comment or email me at rybitski@gmail.com




Free Web Counters
<a href="http://www.allonlinecoupons.com/ct/travel
  • Post a new comment

    Error

    Anonymous comments are disabled in this journal

    default userpic

    Your IP address will be recorded 

  • 27 comments