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Monday, September 9, 2024

Jamie Matthews Turns Junk $0.50 Bluetooth Earbuds Into Swish, 3D-Printed Multi-Room Audio Adapters



Maker Jamie Matthews has discovered a low-cost answer for true wi-fi stereo audio, by pulling aside low-cost Bluetooth headphones and turning them into swish 3D-printed audio adapters — for underneath $10.

“For some time now I have been searching for some Bluetooth adapters that I might use for multi-room/wi-fi stereo all through my residence,” Matthews explains. “Sadly methods just like the Sonos are very costly, plus I need to use the audio system I have already got and love. So I went on a seek for another.”

Dismissing off-the-shelf moveable audio system, Matthews turned to ultra-low-cost “I12” in-ear true wi-fi stereo earbuds — buying quite a lot of 10 units, full with charging instances, for $0.50 a pair as spares-or-repair. “These are inclined to cease working due to the charging case design,” Matthews explains. “This causes the buds not cost any extra, and results in a load of those being thrown away… good for us tinkerers although!”

Matthews wasn’t searching for earbuds, although, and so set about adapting the units for multi-room audio use. Stripping them aside and eradicating the core circuitry, Matthews designed a 3D-printed housing which takes the {hardware} from every earbud and both an unique or optionally expanded-capacity battery and converts it to supply an analog 3.5mm-jack audio output.

The adapters, prepared for connection to Matthews’ current powered audio system, nestle in a 3D-printed dock when not in use — cleverly making use of pogo-pin connectors salvaged from the unique charging case and a cut-down USB cable to robotically cost every adapter when docked.

Matthews has revealed a full information, with 3D print recordsdata, on Instructables, saying the adapters can obtain multi-speaker audio with a ten meter (round 33′) vary when linked to a Bluetooth 5.2 machine.

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