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Following the wiring diagram, connect your speaker wires to the amplifier’s output terminals using a small screwdriver. I snipped off the little Molex connector first. Then solder the amplifier and microphone connections to the Xiao ESP32-S3 as shown.
Also solder the USB plug wires to the battery booster board’s 5V output terminals: red wire to positive (+) and black wire to ground (–). Plug the connector into the Xiao’s USB port to power it and the amplifier. Don’t forget to connect the Xiao’s antenna if you’re planning to use Bluetooth!
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