Design and implementation of the numeric automobile instrument

A total solution of the numeric automobile instrument was studied, which is based on 89C51. The solution uses the modular design, divides the player into the core module, the sensor and signal processing module, the display module, the audio module, the power module etc. Test data shows that system achieves 3 bits numeric display of automobile speed and oil capacity, and 5 bits numeric display of mileage. The system has good stability, visual display, high safety factor, practicality value, etc.