What is an buzzer and speaker?

l  Buzzer

The buzzer is an electronic sounder with integrated structure. It is powered by DC voltage and is widely used in electronic products such as computers, printers, copiers, alarms, electronic toys, automotive electronics, telephones, timers, etc. as sounding devices. .

The buzzer is mainly divided into two types: a piezoelectric buzzer and an electromagnetic buzzer. The buzzer is represented in the circuit by the letters "H" or "HA" (the old standard is "FM", "LB", "JD", etc.).

1.Piezoelectric buzzer

The piezoelectric buzzer is mainly composed of a multivibrator, a piezoelectric buzzer, an impedance matching device, a resonance box, an outer casing and the like. Some piezoelectric buzzer housings are also equipped with light-emitting diodes.

2.Electromagnetic buzzer

Electromagnetic buzzer It consists of an oscillator, an electromagnetic coil, a magnet, a diaphragm and a casing. After the power is turned on, the audio signal current generated by the oscillator passes through the electromagnetic coil, causing the electromagnetic coil to generate a magnetic field. The vibrating diaphragm periodically vibrates the sound under the interaction of the electromagnetic coil and the magnet.

The shape of the buzzer is shown below.

Buzzer : PKM13EPYH4000-A0

 l  speaker

      The speaker, also known as the "horn", is a very common electroacoustic transducer. The shape of the speaker is as shown.

Speaker: CVS-1708

This article is from Allicdata Electronics Limited which offers a varity of buzzers and speakers. For more product information, please go to the website to get it.