Schematic diagram of Bluetooth card reader small speaker

 
Overview
Function: Play TF card music, read and write TF card data, USB_AUDIO, Bluetooth audio connection playback, reject calls, answer calls, hang up calls, call back, QQ voice calls, etc. Power consumption is 30mA 3.7v lithium battery except for the amplifier. In addition, it can be expanded to add radio and AUX two-way analog input. Solution: Mountain View SU6860B as the card reader and MCU+Vimicro WS9621NLSE as Bluetooth connection.
Design Files
 
 
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Update:2025-06-18 21:32:44

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