This circuit is used to sense or detect the water level within the tank or washing machine or pool, etc.

The circuit diagram of the water level indicator using the buzzer is shown below. Generally, it is connected through a switching circuit to switch ON/OFF the buzzer at the necessary time interval. To operate this, a 9V battery is used but it is suggested to utilize a regulated +5V/+6V DC supply. This buzzer uses a DC power supply that ranges from 4V – 9V. This sound is because of the internal oscillating circuit within it. A readymade type looks heavier & generates a Beep. Once a simple type is power-driven then it will generate a beep sound continuously.

There are two kinds of buzzers commonly available like simple and readymade. So in most applications, this component is widely used. It is an extremely small & solid two-pin device thus it can be simply utilized on breadboard or PCB. The mounting configurations of buzzers include the following.Ī buzzer is an efficient component to include the features of sound in our system or project. So this continuous action will produce a sharp sound signal. Once a potential disparity is given across these crystals, then they thrust one conductor & drag the additional conductor through their internal property. A piezo type includes piezo crystals among two conductors. The working principle of a buzzer depends on the theory that, once the voltage is given across a piezoelectric material, then a pressure difference is produced. The applications of magnetic buzzers are similar to the piezo type in household devices, alarms such as watches, clocks & keyboards. Magnetic buzzers utilize an electric charge instead of depending on piezo materials to generate a magnetic field, after that it permits another element of the buzzer to vibrate & generate sound. The magnetic type is more fixed as compared to the piezo type because they work through a magnetic field. Like a piezo type, magnetic is also used to generate a sound but they are different due to core functionality. It generates sound throughout the disc movement & magnetism. The working principle of this is similar to magnetic and electromagnetic. The designing of these types of buzzers can be done with a bare metal disc & an electromagnet. But the main difference is that the vibrating buzzer is placed on the outside instead of the inside. These types of buzzers are subtypes of electromagnetic, so the components used in this type are also similar. Some of the buzzers are also designed with LEDs. This kind of buzzer is made with a resonance box, multi resonator, piezoelectric plate, housing, impedance matcher, etc. The sound pressure level is 85dBA or 10cmĪ buzzer is available in different types which include the following.Īs the name suggests, the piezoelectric type uses the piezoelectric ceramic’s piezoelectric effect & pulse current to make the metal plate vibrate & generate sound.Operating voltage ranges from 3V to 24V DC.Operating Temperature ranges from – 20° C to +60☌.The specifications of the buzzer include the following. In the year 1951, they recognized the Application Research Committee of Barium Titanate that allows the corporations to be cooperative competitively & bring about numerous piezoelectric creations. So, this development primarily came due to cooperative efforts through the manufacturing companies of Japanese. These buzzers were invented by manufacturers of Japanese & fixed into a broad range of devices during the period of 1970s – 1980s. This buzzer was launched in the year 1831 by an American Scientist namely Joseph Henry but, this was used in doorbells until they were eliminated in 1930 in support of musical bells, which had a smooth tone. The history of an electromechanical buzzer and piezoelectric is discussed below.

A piezo buzzer