Buzzers

1. What is buzzer speaker?

A buzzer speaker is a basic electronic component that is used to get audio output signal in any project. It is mostly used with Microcontrollers like Arduino Uno and Node MCU. The buzzer module can be used in projects like Water Tank Level Alarm, Security System and other projects in which audio output is required. 

2. What is buzzer and how it works?

A buzzer is a sound producing electronic component. It is basically used in DIY projects like, alarm system, warning devices, toys, timers etc. Piezo buzzers are inexpensive gadgets that can produce standard beeps and tones. If we see the working of a buzzer, it consists of a material known as piezo crystal, a piezo crystal a piezo crystal has a property of changing its shape whenever voltage is applied to it. Thus, when the voltage is applied to the piezo it makes the beep tone. 

3. How do I know if my buzzer is working?

To know if the buzzer or buzzer module is working or not, you can simply connect it to Arduino’s Digital Pin and other pin to the ground. After connecting the buzzer, connect the power cable of Arduino. If the buzzer makes a continuous tone, that means your buzzer is working fine. However, it is always recommended to use a resistor while using a buzzer. Resistor can protect the buzzer from high voltage.

4. What are the two kinds of buzzer?

The two commonly used buzzers are Piezo Buzzers and Magnetic Buzzers. A piezoelectric buzzer the piezo material changes in size when voltage is applied to it. While in a magnetic buzzer when the current is applied, it passes through the coil and produces a magnetic field. Further, this magnetic field creates vibration and buzzing sound.

5. What are the Applications Of Buzzer?

The applications of the devices include the following.

• Medical Devices: In medical equipment and healthcare settings, buzzers are utilized in patient monitoring systems, medical alarms, and critical care devices. 
• Alarm Circuits: In alarm circuits are used in security systems, fire detection systems, burglar alarms, and industrial safety equipment.
• Portable Devices: Portable electronic gadgets include this device to give audible feedback, alerts, or notifications. This makes it helps users to interact with the device.
• Security Systems: In security settings, It acts as audible alerts to indicate breaches, unauthorized access, or other security-related events. 
• Communication Devices: This device is used in telecommunication devices such as telephones, two-way radios, and intercoms, to signal incoming messages, calls, or notifications.
• Timers: It is built into timing systems and devices like kitchen timers, stopwatch apps, and industrial process control systems. Make an audible sound when tasks are completed.
• Navigation Systems: Used in navigation systems, GPS devices, and vehicle navigation units to make audible alerts, prompts, or warnings for route guidance or navigation instructions.
• Industrial Machinery: Into industrial machinery and equipment it is used to signal malfunctions, maintenance alerts, or operational status. This allows operators to quickly respond to issues.
• Automobile electronics: In cars, it have several functions, such as warning drivers about low fuel, open doors, reminders to wear seatbelts, and alerts for system malfunctions.
• Household Appliances: Many household appliances like washing machines, microwave ovens, dishwashers, and coffee makers use it to signal when cycles are complete, indicate errors or malfunctions, and give user feedback.  
• Game Shows: Used in game show formats, that allow contestants to signal readiness or answer questions. This facilitates interactive and fun gameplay.
• Sporting Events: Used in sporting events like quiz competitions, game shows, and trivia contests as signaling devices for contestants to show they're ready or answer questions.
• Robotics: In robotics and automation it is used as a signaling device to show errors, task completion, or safety warnings in robotic systems, industrial automation, and autonomous vehicles.

6. What are the Types of Buzzer?

This is available in 3 types, such as,

• Piezoelectric: When a pulse of current passes through it by using the piezoelectric effect the piezoelectric ceramic creates vibrations or sound in the metal plate. This device also known as a piezo buzzer includes components like a resonance box, multiple resonators, piezoelectric plate, housing, and impedance matcher. Piezoelectric buzzers are often used in electronic devices due to their compact size, low power consumption, and durability. They are commonly found in devices like alarms, timers, and electronic gadgets.  
• Electromechanical: These devices convert electrical energy into mechanical motion. These devices are designed using an electromagnet and a simple metal disc. It operates on principles similar to magnets and electromagnets. When the electromagnet activates, it causes the metal disc to move and create sound through the interaction of movement and magnetism. A lot of printers rely on electromechanical parts like motors and solenoids to move the printing head, feed paper, and handle other mechanical tasks.
• Mechanical: A mechanical buzzer is a signaling device that produces sound through purely mechanical means. Unlike other electronic volume buzzers, which rely on electrical signals to generate sound. These devices are a subtype of electromagnetic buzzers, so they use similar components.