The application of circuit boards in automobiles is very extensive. Specifically, the application of circuit boards in automobiles includes the following aspects: 1 Control system: The circuit board plays a crucial role in various control systems of the car, such as the engine control unit (ECU), brake system control unit (ABS), air conditioning system control unit, etc. The circuit board controls various functions of the vehicle by connecting various sensors and actuators. 2. Dashboard: The dashboard of a car has various display screens, indicator lights, and pointers, all of which require electrical connection and control through circuit boards. 3. Entertainment system: The entertainment system in modern cars is becoming increasingly complex, including sound systems, navigation systems, Bluetooth connections, etc. The circuit board connects various audio and video devices to achieve in car entertainment functions. 4. Electric vehicles: The battery management system (BMS) and motor control system in electric vehicles cannot do without the support of circuit boards. The circuit board monitors the status of each battery cell and controls the speed of the motor to achieve normal operation of electric vehicles. Overall, the application of circuit boards in automobiles covers various aspects of the vehicle and is an indispensable component of automotive electronic technology.