Buzzer Unit is a mini passive buzzer unit, drived by 4KHz signal, that sounds up to 72dB within 10cm distance under rating input power. With the feature of compact size, low-power consumption, awesome audio performance, and a protective housing. Applied for varied buzzer alarm scenario. Features Drive signal: 4KHz oscillation frequency Up to 72dB (within 10cm, at rating power) Drive signal: 4KHz 1/2duty square wave Include 1x BUZZER Unit 1x HY2.0-4P cable (20cm) Specification Specifications Parameters Drive frequency 4KHz 1/2duty square wave Power consumption 5V@86mA Net weight 3.5g Gross weight 8.5g Product size 24 x 24 x 8mm Packing size 93 x 138mm PinMap M5CORE - PORT B G26 BUZZER SIGNAL Example Arduino #include #define buzzer_pin 26int freq = 4000;int ledChannel = 0;int resolution = 10;void setup() { ledcSetup(ledChannel, freq, resolution); //Sets the frequency and number of counts corresponding to the channel. 设置通道对应的频率和计数位数 ledcAttachPin(buzzer_pin, ledChannel); //Binds the specified channel to the specified I/O port for output. 将指定通道绑定到指定 IO 口上以实现输出 ledcWrite(ledChannel, 512); //Output PWM. 输出PWM}void loop() { ledcWrite(ledChannel, 512); //Output PWM. 输出PWM delay(3000); ledcWrite(ledChannel, 0); //Output PWM. 输出PWM delay(3000);}
