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KD9561 CK9561 Alarm Module DIY Kit 4 Kinds of Sound

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Connection type:

  • Alarm whistle: SEL1=NC SEL2=NC
  • Fire alarm: SEL1=1 SEL2=NC
  • Ambulance voice: SEL1=0 SEL2=NC
  • Machine guns sound: SEL1=x SEL2=1

 

  • NC: Dangling inputs
  • 1: VCC
  • 0: GND

 

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