Active Buzzer

Kaluma library to generate beep sound with active buzzer

Wiring

Here is a wiring example.

Raspberry Pi Pico	Active Buzzer
GND	-
GP0	+

Wiring for a board with TR (KY-012).

Raspberry Pi Pico	Active Buzzer
3V3	VCC
GND	GND
GP0	I/O

Install

npm install https://github.com/niklauslee/active-buzzer

Usage

const buzzer = require('active-buzzer');
const PIN = 0;

// beep 5 times.
buzzer.beep(PIN, 5);
delay(1000);

// beep 10 times.
buzzer.beep(PIN, 10);
delay(1000);

// beep 5 times with 100ms interval.
buzzer.beep(PIN, 5, 100);

Example for some boards with TR (reversed signal)

// Example for boards with TR (beep = LOW, stop = HIGH)

const buzzer = require('active-buzzer');
const PIN = 0;

// beep 5 times.
buzzer.beep(PIN, 5, 50, LOW);
delay(1000);

// beep 10 times.
buzzer.beep(PIN, 10, 50, LOW);
delay(1000);

// beep 5 times with 100ms interval.
buzzer.beep(PIN, 5, 100, LOW);

API

beep(pin, count[, interval[, beepSignal]])

Generate beep sound.

• pin <number> Pin number for active buzzer.
• count <number> Number of count to beep.
• interval <number> delay time in milliseconds to beep as well as stop. Default: 50.
• beepSignal <number> Signal to make beep sound. Default: HIGH. (In some boards with TR, LOW signal is required to make beep bound.)