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並前往https://rees52.com/diy-iduino/759-play-a-buzzer-when-sounds-value-exceed-a-set-point-interfacing-with-arduino-uno-rc004

Turn on/off the 5v relay module using Sound sensor ... - REES52

Sound Sensor Module – 1 Arduino UNO with USB Cable – 1 1 Channel 5v Relay Module- 1 9v battery -1 9V snapper with DC jack – 1 Jumper wires( male to female ) ...

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