{"product_id":"ky-006-passiver-buzzer-alarm-modul-fur-arduino","title":"KY-006 buzzer module - passive, 3-5 V, PWM-controlled","description":"\u003ch3\u003eProduct overview\u003c\/h3\u003e \u003cul\u003e \u003cli\u003ePassive piezo buzzer module for PWM control\u003c\/li\u003e \u003cli\u003e3 connection pins on a 2.54 mm pitch: signal, NC, ground\u003c\/li\u003e \u003cli\u003eOperating voltage 3–5 V\u003c\/li\u003e \u003cli\u003eFrequency range 1.5–2.5 kHz, maximum volume near 2 kHz\u003c\/li\u003e \u003cli\u003eCompatible with Arduino, Raspberry Pi, and ESP32\u003c\/li\u003e \u003cli\u003eOperating temperature range −20 to +70 °C\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eProduct description\u003c\/h3\u003e \u003cp\u003eA 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.\u003c\/p\u003e \u003cp\u003eThe 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.\u003c\/p\u003e \u003cp\u003eDifferent 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.\u003c\/p\u003e \u003cp\u003eBecause 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.\u003c\/p\u003e \u003ch3\u003eSafety notice\u003c\/h3\u003e \u003cp\u003eThe 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.\u003c\/p\u003e \u003ch4\u003eScope of delivery\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e1x KY-006 Passive Buzzer – Alarm Module for Arduino\u003c\/li\u003e \u003c\/ul\u003e","brand":"Funduino","offers":[{"title":"Default Title","offer_id":65997945962845,"sku":"F23106690","price":1.3,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1074\/5649\/5965\/files\/ky-006-passiver-buzzer-alarm-modul-fuer-arduino-funduino-7495870.png?v=1791495990","url":"https:\/\/funduino.com\/en\/products\/ky-006-passive-buzzer-alarm-module-for-arduino","provider":"Funduino","version":"1.0","type":"link"}