When it comes to buzzer, everyone should be familiar with it. Now it is widely used in some electronic products, such as: computers, copiers, alarms, toys, timers and other small and medium-sized electronic devices, the buzzer is used to issue an alarm or indicate the content. So, what are the buzzer models ? The buzzer is generally small, usually large as a 5th battery, and small as a button. The application in various electronic products is very extensive, and the general electronic products will use it. Here I will introduce you to the buzzer model and related knowledge! About buzzer The so-called buzzer is actually an electronic sound-generating device that can emit sound, and it adopts an integrated structure. By inputting a direct-current voltage into such an electronic sound-emitting device, the sound-generating device can independently emit a sound. Buzzer This electronic generator is used in many electronic devices such as computers, printers, alarms, copiers, automotive electronics, electronic toys, and so on. In a complicated circuit of electronic equipment, the buzzer is generally represented by the letter "H" or "HA", and we can see this symbol in the circuit diagram of a general electronic device. Buzzer classification The commonly used buzzer includes piezoelectric buzzer and electromagnetic buzzer. Their structures and working principles are different. Depending on how the buzzer works, it can be divided into two categories: active buzzer and passive buzzer. Both of them have obvious differences in appearance and composition. Buzzer Model As an integrated electronic sounder for electronic devices, it is also one of relatively independent electronic components. Therefore, the products it produces also have corresponding models, and the types of buzzer of different types and uses are also different. The buzzer model generally represents the size and operating voltage of the buzzer. The size of the buzzer is often expressed in terms of diameter and height, and the operating voltage is generally expressed by how many V. The commonly used buzzer operating voltage is 1.5V, 3V, 5V, 24V and 220V, and there are many sizes, for example, there are 12085 buzzer, 12095 buzzer, etc., in which 12 represents the diameter is 12mm, and 85 And 95 respectively represent the height is 85mm, 95mm. How the buzzer works Our common buzzer is usually powered by DC power. As we can see, the buzzer is an integrated structure product with a high-precision circuit board. There are two main types, one is a piezoelectric buzzer and the other is an electromagnetic buzzer. 1. Piezoelectric buzzer This kind of buzzer mainly consists of multi-vibrator, buzzer, matcher, resonance box and other components. The multivibrator is actually what we call integrated circuits. When the buzzer is working, the current passes through the multivibrator. The multivibrator will output the audio signal of the corresponding intensity. This signal is transmitted from the matcher to the buzzer. In the film, the buzzer (the buzzer is usually made of a ceramic piece plus a brass piece or a stainless steel piece) will determine whether or not to emit a sound according to different incoming audio signals. 2. Electromagnetic buzzer This type of buzzer is very different from the piezoelectric buzzer. It consists of an oscillator, a magnet, a solenoid coil, and a diaphragm. After the power is turned on, an audio signal is first generated by the oscillator, and then the magnetic signal generates a magnetic field through the electromagnetic coil. The vibrating diaphragm then emits different sounds depending on the magnetic field. Difference between active buzzer and passive buzzer Note: The "source" here does not refer to the power supply, but refers to the source of the shock. In other words, the active buzzer has an internal oscillating source, so it will be called as soon as it is powered on. The passive internal source will not be oscillating, so it cannot be buzzed with a DC signal. Must use 2K-5K square wave to drive it The active buzzer is often more expensive than the passive one, because inside many oscillating circuits. Passive Buzzer Benefits Cheap 2. The frequency of sound is controllable, and the effect of “multiple meters of Solasi†can be made 3. In some special cases, it is possible to multiplex a control port with the LED The advantages of active buzzer Program control is easy. Editor's summary: The types and models of buzzer used by different electronic devices are different. We must first learn to recognize the buzzer and its model in order to better use them. In addition, general buzzer manufacturers can produce different sizes of buzzer according to customer requirements. Youth style decoration design Shanghai tooling decoration design courtyard decoration design effect decoration design effect drawing bedside design The present invention provides a multifunctional pull faucet, comprising: a faucet body, a drawing part is provided at the water outlet port thereof, and the drawing part is connected to a main channel, wherein at least three are provided in the faucet body A branch channel, and the three branch channels are all connected to the main channel. 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