KY-006 buzzer module - passive, 3-5 V, PWM-controlled
Pay in 30 days
Pay in 30 days
Description
Product overview
- Passive piezo buzzer module for PWM control
- 3 connection pins on a 2.54 mm pitch: signal, NC, ground
- Operating voltage 3–5 V
- Frequency range 1.5–2.5 kHz, maximum volume near 2 kHz
- Compatible with Arduino, Raspberry Pi, and ESP32
- Operating temperature range −20 to +70 °C
Product description
A passive piezo buzzer module produces tones only when driven by an external alternating electrical signal. Without this signal, it remains silent. This distinguishes it from active buzzers, which have their own oscillator and emit a fixed tone independently. Here, a square wave must be supplied, switching rapidly between two voltage levels to determine the pitch.
The module has three connection pins spaced 2.54 mm apart. The pin marked S receives the control signal, and the minus pin connects to ground. The middle pin is not connected to the circuit and remains unused. Therefore, only two of the three pins are needed for operation.
Different control frequencies produce different pitches. The module operates at voltages between 3 and 5 V, with the highest volume near its resonant frequency of around 2 kHz. A microcontroller generates the required square wave, for example, using a PWM function with an adjustable frequency. This makes it possible to create simple melodies, changing alarm tones, or audible feedback when a button is pressed or a sensor event occurs.
Because the module requires a control signal, a microcontroller board is needed. It is controlled via a digital output or a PWM pin, depending on whether a simple on-off signal is sufficient or variable pitches are desired.
Safety notice
The module is intended exclusively for building prototypes and for testing and development purposes. It is not designed for installation in household electrical circuits or operation on mains voltage. When working on or near electrical installations, a qualified electrician must be consulted.
Scope of delivery
- 1x KY-006 Passive Buzzer – Alarm Module for Arduino