DIY Bluetooth Adapter for any Headphones

I recently bought a new headset that I’m mostly satisfied with. Except I would really like the convenience of streaming music wirelessly!
Instead of buying a more expensive headset, I cut the cord, and went to work to create a bluetooth headset adapter. That’s what I’m showing you today.
At first I looked at all the parts needed to make an adapter from scratch. But realized I could get most of the circuitry needed in a much smaller package, by modifying a cheap pair of bluetooth earbuds.
Click here for detailed build instructions.