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MT8870 DTMF Speech Decoder Module Voice Module
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1, onboard MT8870 complex frequency decoding chip
2, onboard voice input interface
3, onboard 5 LED lights, convenient to view the output state
4, chip main pins have been drawn
5, PCB size: 26.5 (mm)*24.5 (mm)

 

Note: This version of PCB, Pin Header pin VCC and GND are reversed, please carefully when using

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