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Snap action, limit switches are electronic components used in a wide range of applications, ranging from automotive to industrial and even home appliances. They act as an important component of the circuit by transmitting a signal when a desired event occurs. In order to understand their application field and working principle, it is important to start from the basics. A limit switch is a type of switch that uses a mechanical motion to recognize the position of a controlled object. It usually takes the form of two levers connected by a pivot. The two levers can be either spring-loaded or moved manually. When the two levers are in contact, the switch closes and a signal is sent. The limit switch is used in many different applications, ranging from automotive to industrial and even home appliances, depending on the desired application. But in general, it is mainly used to detect the presence or absence of objects, or the motion of those objects, that fall within its working range.

One of the most common uses of limit switches is in automotive applications such as car doors, fuel tanks, and automatic windows. In this case, the limit switch is used to detect a closing or opening door. When the door is opened, the limit switch detects the motion and sends a signal to open the car door. Similarly, when the door is closed, the limit switch will detect the motion and send a signal to close the car door.

In industrial applications, limit switches are widely used to detect the presence or absence of objects or for monitoring their movement. They are also used to detect temperature changes and to control pressure, fluid flow, and speed in machines. For instance, a limit switch is used in the conveyor system to detect when the conveyor belt is overloaded, preventing it from crumbling. Similarly, it can be used to detect the presence of a dangerous object in the range of the switch, in order to increase safety.

Similarly, limit switches are used in home appliances. In this case, they are used to ensure the safety of the user. For instance, limit switches are used in washing machines to detect the door opening and closing. If the door is opened during the washing process, the limit switch will cut off the power supply and prevent any accidental injuries. Likewise, in refrigerators, limit switches are used to detect if the door is opened or closed and prevent the cooling system from running when it is not necessary.

It is also important to note that limit switches can be used to detect both digital and analog signals. For instance, in automotive applications, the limit switch can be used to detect the number of turns of the engine, so as to adjust the speed of the car. In industrial applications, limit switches are used to monitor the speed of a conveyor belt, the pressure in a hydraulic system, the temperature in a machine, etc.

The working principle of limit switches is quite simple. A limit switch consists of two levers connected by a pivot. The levers are either spring-loaded or manually move when a force is applied. When the two levers come into contact with each other, the switch closes and sends a signal. Depending on the desired application, this signal can be either digital or analog.

In conclusion, limit switches are essential components used in a wide range of applications. They are used to detect the presence or absence of objects, and the motion of those objects, that fall within their working range. Moreover, limit switches can be used to detect both digital and analog signals, making them versatile and highly useful for various applications.

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