文档介绍：基于单片机的数字电压表的设计摘要本文介绍了一种基于单片机的简易数字电压表的设计。该设计主要由三个模块组成: A/D 转换模块, 数据处理模块及显示模块。 A/D 转换主要由芯片 ADC080 8 来完成,它负责把采集到的模拟量转换为相应的数字量在传送到数据处理模块。数据处理则由芯片 AT89C51 来完成,其负责把 ADC0808 传送来的数字量经过一定的数据处理, 产生相应的显示码送到显示模块进行显示; 此外, 它还控制着 ADC080 8 芯片工作。该系统的数字电压表电路简单,所用的元件较少,成本低,且测量精度和可靠性较高。此数字电压表可以测量 0-5V 的1 路模拟直流输入电压值, 并通过一个四位一体的 7 段数码管显示出来。关键词单片机;数字电压表; A/D 转换; AT89C51 ; ADC0808 基于单片机的简易数字电压表的设计 II Design of Simple Digital Voltmeter B ased on Single-chip Microcontroller Tian Mingming Abstract This paper which introduces a kind of simple digital voltmeter is based on s ingle-chip m icrocontroller design. The circuit of the voltage meter is mainly consisted of three mould pieces: A/D converting mould piece, A/D converting is pleted by the ADC0808, it converts the collected analog data into the digital data and transmits the e to the manifestation controlling mould piece. Data processing is pleted by the AT89C51 chip, it processes the data produced by the ADC0808 chip and generates the right manifestation codes, also transmits the codes to the manifestation controlling mould piece. Also, the AT89C51 chip controls the ADC0808 chip to work. The voltmeter features in simple electrical circuit, lower use of elements, low cost, moreover, its measuring precision and reliability. The voltmeter is capable of measuring voltage inputs from 1 route ranging from 0 to5 volt, and displaying the measurements though a digital code tube of7 pieces of LED. Keywords Single-chip microcontroller; Digital voltmeter; A/D converter; AT89C51; 基于单片机的简易数字电压表的设计 III ADC0808 基于单片机的简易数字电压表的设计 IV 目录 1 引言................................................................................................ 1 2 设计总体方案............................................................................... 2 设计要求................................................................................ 2 设计思路............................................................................... 2 设计方案...............................................