介绍了一种以MCS 51单片机为主控器，以ADC0809为核心，以气压、油压、温度、霍尔元件等传感器为主要外围元件的车用数字仪表（VDI）的设计与实现。该仪表系统具有显示直观、准确，使用方便可靠等优点，代表了车用仪表的最新发展趋势。-To introduce a single-chip microcomputer-based controller MCS 51 to ADC0809 as the core, pressure, oil pressure, temperature, the Hall element sensor, such as the external components as the main vehicle figure meter (VDI) The design and implementation. The instrumentation system has displayed an intuitive, accurate and easy to use and reliable, etc., on behalf of the vehicle dashboard latest trends.