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  • Author Author: tariq.ahmad
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DIY Open Source Bluetooth Headphones -- Episode 586

Dodgy apps, subscription fees, and exclusive phone apps for a pair of headphones? Clem says: no thanks! He's fed up with the shenanigans some manufacturers pull for simple products that should just work. And why change to a different model of headphones when you've found the perfect wired pair? Can't you have that same fit and style, but wireless? So, for this project, Clem sets out to add Bluetooth to some of his favorite wired AKG headphones, using a DFRobot FireBeetle and an I2S audio module. But, to be a true open-source alternative, Clem has to whip up a custom PCB, which doesn't go according to plan. Learn the pitfalls of overly similar part numbers by following his process of figuring out the problem! What Device should have an open source variant in your opinion and would you build it yourself?

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Bonus Content:

Bill of Material:

Product Name Manufacturer Quantity Buy Kit
DF robot firebeetle Esp32 DFROBOT 1 Buy Now
 

Additional Parts:

PCM5100 i2s module
Your favourite wired headphones

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  • Nice build! I respect all your projects using a custom board and SMD components. (I'm still mainly doing through-hole components myself) Also, was the general volume from the headphones sufficient? I expected to use of amplifiers in most if not all headphones, but now I'm curious about how many wireless headphones actually implement an amplifier or if it's just from the DAC.

  • in reply to adamsoileau1

    thanks, I expect most cheap headphones to use purpose built MCUS with integrated DACs . I havent taken apart any commercial offerings so I dont actually know.
    in my experience with these designs the bare I2S module has a very basic amp built in and that was just enough taht I wiuld consider it good.
    about 30% of the board space on my custom board is taken by the actual stereo amplifier (2 caps o nthe back havent even been populated yet).
    So it should be a lot louder. I´d rather have power overhead than to little.

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  • in reply to adamsoileau1

    thanks, I expect most cheap headphones to use purpose built MCUS with integrated DACs . I havent taken apart any commercial offerings so I dont actually know.
    in my experience with these designs the bare I2S module has a very basic amp built in and that was just enough taht I wiuld consider it good.
    about 30% of the board space on my custom board is taken by the actual stereo amplifier (2 caps o nthe back havent even been populated yet).
    So it should be a lot louder. I´d rather have power overhead than to little.

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