bluetooth_headphones_openSo i go through ear buds like crazy.  Cheap ones last me two weeks to a month, high end ones last me 6-12 month.  I though this may be because of snags. So i bought a cheap set of bluetooth headphones.  It lasted around 90 days.  the hardware works fine, but the wires to the ear buds wore out.

I liked the functionality of the bluetooth thing so i decided to add a headphone jack to it so i can plug in any headphones i want.

 

Components:

  • bluetooth head phones
  • 3.5mm TRRS(4-pole) headphone jack

 

Steps:

  • opening it up
  • removing the ear bud wires
  • drilled holes for the headphone jack
  • soldered wires from board to jack
    • [R+] to [right]
    • [R-] to [ground]
    • [L+] to [left]
  • added so glue to re-enforce the wires contacts
  • closed it up and added some glue to hold it together
  • plug in a set of headphones
  • zip tie excess wire from plug to buds

 

Comments:

  • test with 3-pole and 4-pole headphone jacks before closing it up
  • use thin wire so it doesn’t pull off the PCB, I used 30AWG wire wrap wire.
  • be careful not to pull off contact from PCB.  I used super glue to re-enforce contact

 

Useful info:

trrs-diagram2
from  CableChick
4-pole-3-5mm_jack-dimensions-mklec-350x350
Example of a 3.5mm TRRS 4-pole cellphone headphone jack, from mklec

 

 

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