Ky-012 Active Buzzer Module for Arduino

• Type: Buzzer
• Voltage: 3.5-5.5V.
• Transport Package: Bag
• Specification: BSM040
• Trademark: OEM/ODM
• Origin: China
• Model NO.: BSM040
• HS Code: 8542399000
• Production Capacity: 50000PCS/Month

Product Description

Description:

1. Working Voltage: 3.5-5.5V. 
2. Working Current: <25mA.
3. Brand new and high quality.

The structure of the buzzer
1.Piezoelectric buzzer: the piezoelectric buzzer is mainly composed of multivibrator, piezoelectric buzzer, impedance matcher, resonator box and shell.Some piezoelectric buzzers have leds on their shells.

A multivibrator consists of a transistor or an integrated circuit.When the power is switched on (1.5v-15v dc working voltage), the multivibrator vibrates, and the audio signal of 1.5-2.5khz is output.
Piezoelectric buzzer sheet is made of lead zirconate titanate or lead magnesium niobate piezoelectric ceramic material.Silver electrodes are plated on both sides of the ceramic sheet, polarized and aged, and then bonded to brass or stainless steel sheets.