The Hall sensor on the car is also called a camshaft position sensor. The function is to determine the ignition of the cylinder, which means adjusting the ignition time. If he breaks down, it won't affect the car, but the engine won't run properly, which is very serious. It is not a matter of whether fuel consumption is affected or not, it is not completely uncontrollable. It needs to be replaced.

The working principle of Hall sensors:

Hall current sensors are made based on the Hall principle. It has two working modes, namely magnetic balance and straight. Hall current sensors generally consist of a primary circuit, a magnetic ring, a Hall device, a secondary coil, and an amplification circuit.

（Single phase AC current sensor-B5）

Its function is a Hall switch, which can make our phone case smart. The specific effect is to turn on the bright screen and close the black screen. In short, if a mobile phone is equipped with a Hall sensor, as long as a magnet is built into the case, the above functions can be achieved, and most smartphones currently have Hall sensors.

Additionally,hall sensor Its other uses are as follows:

1、 When making a phone call, if the screen goes off, it is a distance sensor. Currently, infrared and ultrasonic distance sensors are used;

2、 Temperature sensors monitor battery temperature to prevent accidents, such as pausing charging when the charging temperature is too high;

3、 Flipping the screen now uses a gyroscope, which can also be used to flip the mute and shake it.

4、 Hall sensors can be used to open the cover of some phone cases to light up the screen, as well as distance sensors and light sensors to barely judge. The compass also uses Hall sensors, and the light sensor is used to automatically adjust the screen brightness.

In fact, this is a specialized sensor for implementing the leather case function and switching displays on mobile phones. A Hall sensor is a magnetic field sensor made based on the Hall effect. Since the Samsung Note came with a leather case, many phones now come with a case that automatically turns off the screen when the case is closed. This is the function of the "Hall sensor". If a phone has a Hall sensor, the case only needs to have a built-in magnet to achieve the function of turning off the screen when the case is closed. When the flip cover is closed or the phone case is closed, the magnetic component approaches the Hall sensor, which senses the signal and turns off the screen display or switches to a special window position display. Conversely, the screen display is turned on.