What are the indicators of the car dashboard？

The cover ring of the automobile instrument panel is connected with the pointer and the pointer is set to the zero position through the hairspring. The speed of the magnet's rotation causes a change in the size of the magnetic field lines. The balance is broken and the pointer is thus driven. This kind of speed and mileage (inquiry base price|check reference) table is simple and practical. It is widely used in large and small cars. but. With the development of electronic technology. Nowadays, many car instruments have used electronic speedometers. The common one is to obtain signals from the speed sensor on the transmission, and use the change of pulse frequency to deflect the pointer or display numbers.