CAJ | 학술논문

本文设计的数字电压表具有高精度、低成本和便携的特性。使用ADC0809作为A/D转换芯片，能将模拟电压信号通过逐次比较的方式输出8位二进制；通过AT89S52对其进行处理，转换为十进制数，由LCD1602液晶显示出数字电压；利用+9V蓄电池与LM7805组成稳压电路，保证系统电源为+5V稳定输入；设计的数字电压表能测量一路0~+5V的电压，精度为0.020V。
본문설계적수자전압표구유고정도、저성본화편휴적특성。사용ADC0809작위A/D전환심편，능장모의전압신호통과축차비교적방식수출8위이진제；통과AT89S52대기진행처리，전환위십진제수，유LCD1602액정현시출수자전압；이용+9V축전지여LM7805조성은압전로，보증계통전원위+5V은정수입；설계적수자전압표능측량일로0~+5V적전압，정도위0.020V。
In this paper, design of digital voltmeter has characteristic of high precision, low cost and portable. Using ADC0809 as A/D conversion chip, analog voltage signal can be output by means of successive compared 8-bit binary;By AT89S52 devices for handling, converted to a decimal number, by LCD1602 LCD digital voltage;Using+9 v battery and LM7805 regulating circuit, guarantee the stability of system power for+5 v input;Design of the digital voltmeter to measure all the 0~+5 V voltage, accuracy of 0.020 V.