After the power is turned on (as small as 1.2VDC/1.5VDC/3.0VDC, up to 110VAC/220VAC), the audio signal current generated by the oscillator passes through the electromagnetic coil, causing the electromagnetic coil to generate a magnetic field. Under the interaction of the electromagnetic coil and the magnet, the diaphragm on the outer casing is periodically bridged to emit sound.
The mechanical buzzer is mainly suitable for electric products (boiled eggs, soya-bean milk makers, etc.) to make the warning sounding of electronic products; it is also used for the main components on the repeller. Because it not only emits a frequency of 0.5 kHz but also the entire buzzer is vibrating and can be transmitted to the mouse through the ground to achieve the repeller effect. Nowadays, mechanical buzzers are generally active. The active mechanical buzzer contains an audio oscillating circuit. When connected to a DC power supply, it can make a “da da da---” sound with a noticeable vibration.

The mechanical buzzer uses a magnet to move a reed up and down quickly to emit a lower-pitch buzz! It's quieter than the piezoelectric buzzer but uses more power, so you the terminals will have to be closer to the battery packs. You'll need to match the wire colors to the wires from the battery pack.

How mechanical buzzers work in our Buzzers Deep Dive article
If the volume is too loud, simply use a piece of tape over the top hole on the buzzer and the volume will substantially lower.

The Definition, Functional Structure, and Application of mechanical buzzer .
In various industries and everyday life, mechanical buzzers play a vital role in providing audible signals and warnings. These devices are widely used due to their simplicity, reliability, and effectiveness. This article aims to provide a comprehensive understanding of mechanical buzzer sounds, including their definition, functional structure, and applications.

Definition: A mechanical buzzer is an electro-acoustic transducer that converts electrical energy into mechanical vibrations, producing an audible sound. It consists of a power source, an electromagnet, a diaphragm, and a contact mechanism. When an electric current passes through the electromagnet, it generates a magnetic field that attracts the diaphragm, causing it to vibrate and produce sound.

Functional Structure: Power Source: Mechanical buzzers are typically powered by direct current (DC) sources such as batteries or power supplies. The voltage and current requirements vary depending on the specific buzzer model and application.

Electromagnet: The electromagnet is the core component of a mechanical buzzer. It consists of a coil of wire wound around a ferromagnetic core. When current flows through the coil, it creates a magnetic field that interacts with the diaphragm.

Diaphragm: The diaphragm is a thin, flexible membrane made of materials like metal or plastic. It is attached to the electromagnet and vibrates in response to the magnetic field. The diaphragm's size, shape, and material influence the frequency and volume of the sound produced.

Contact Mechanism: The contact mechanism is responsible for controlling the flow of current through the electromagnet. It typically consists of a spring-loaded contact that opens and closes when the diaphragm vibrates. This action interrupts the current flow, causing the diaphragm to vibrate and produce sound.

Main Components Of Mechanical Buzzer
Power source
Mechanical buzzers are typically powered by direct current (DC) sources such as batteries or power supplies. The voltage and current requirements vary depending on the specific buzzer model and application.
Electromagnet
The electromagnet is the core component of a mechanical buzzer. It consists of a coil of wire wound around a ferromagnetic core. When current flows through the coil, it creates a magnetic field that interacts with the diaphragm.
Diaphragm
The diaphragm is a thin, flexible membrane made of materials like metal or plastic. It is attached to the electromagnet and vibrates in response to the magnetic field. The diaphragm's size, shape, and material influence the frequency and volume of the sound produced.

Applications: Mechanical buzzers find applications in various industries and settings due to their simplicity and reliability. Some common applications include: Alarms and Warning Systems: Mechanical buzzers are widely used in alarm systems to provide audible warnings for fire, security breaches, and other emergencies. Their loud and distinctive sound ensures that people can quickly respond to potential threats. Industrial Machinery: In industrial settings, mechanical buzzers are used to indicate machine malfunctions, completion of a task, or other important events. They help operators and workers stay informed and maintain productivity. Consumer Electronics: Mechanical buzzers are commonly found in devices such as microwave ovens, washing machines, and home security systems. They provide audible feedback to users, indicating the completion of a process or the occurrence of an error. Automotive Industry: Mechanical buzzers are utilized in automobiles for various purposes, including indicating seatbelt warnings, low fuel levels, or open doors. They play a crucial role in ensuring driver and passenger safety.

Mechanical buzzers are essential electro-acoustic transducers that convert electrical energy into audible sound signals. Their functional structure, which includes a power source, electromagnet, diaphragm, and contact mechanism, enables them to produce distinct and attention-grabbing sounds. From alarms and industrial machinery to consumer electronics and automobiles, mechanical buzzers find extensive applications across various industries, contributing to safety, productivity, and convenience.

What is a mechanical buzzer?
The mechanical buzzer is a special sub-category of the electromagnetic buzzer, which consists of an oscillator, an electromagnetic coil, a magnet, a casing and etc.

The mechanical buzzer is always with high impedance, DC resistance is infinite, AC impedance is also very large, narrow-band sound device, usually made of piezoelectric ceramics. Need a larger voltage to drive, but the current is very small, just a few mA and the power is also very small.

The mechanical buzzer is an electronic buzzer with an integrated structure, which is powered by a DC voltage and widely used in doll bell, printer,copying machine,alarm,electronic toys,timers and other small electronics equipment.

Unlike ordinary electromagnetic buzzers, the vibrating piece of the mechanical buzzer is mounted on the outer casing, and its frequency is generally low, around 0.5 kHz. The general electromagnetic buzzer is around 2 kHz.

What is the pronunciation principle of mechanical buzzer?
After the power is turned on (as small as 1.2VDC/1.5VDC/3.0VDC, up to 110VAC/220VAC), the audio signal current generated by the oscillator passes through the electromagnetic coil, causing the electromagnetic coil to generate a magnetic field. Under the interaction of the electromagnetic coil and the magnet, the diaphragm on the outer casing is periodically bridged to emit sound.

The mechanical buzzer is mainly suitable for electric products (boiled eggs, soya-bean milk makers, etc.) to make the warning sounding of electronic products; it is also used for the main components on the repeller. Because it not only emits a frequency of 0.5 kHz but also the entire buzzer is vibrating and can be transmitted to the mouse through the ground to achieve the repeller effect.

Nowadays, mechanical buzzers are generally active. The active mechanical buzzer contains an audio oscillating circuit. When connected to a DC power supply, it can make a “da da da---” sound with a noticeable vibration.

The characteristic of mechanical buzzer
1. The mechanical buzzer uses a magnet to move the reed quickly to make a lower beep;
2. Quieter than piezoelectric buzzer, but higher power consumption;
3. If the volume is too loud, just stick a piece of tape on the top hole of the buzzer.