BUZZER UNIT

SKU:U132

Description

Passive Buzzer Unit is a mini passive buzzer unit, drove 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.

Product 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)

Applications

• Buzzer/reminder

Specification

PinMap

• BUZZER

Schematic

Example

Arduino

#include <Arduino.h>

#define buzzer_pin 26
int 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);
}

UIFlow

UIFlow Functions

• Set buzzer state
  • ON
    Buzzer on.notice: default frequency is 4,000Hz.
  • OFF
    Buzzer off.

• Set frequency of buzzer
  20~20,000Hz