Author(s)

Weifeng Huang, Xin Yang

Corresponding Author

Weifeng Huang

ABSTRACT

Pure hardware digital voltmeter has complex structure, low measurement accuracy and high price. In daily use, it has a high frequency of use, resulting in frequent damage to the multimeter and high failure rate, which brings a lot of inconvenience to the use and maintenance. In order to design a high precision digital voltmeter, the method of combining AT89C52 single chip computer with ADC0809 A/D conversion is adopted. Through Proteus simulation experiment, we get the measurement effect that the ordinary hardware digital voltmeter cannot achieve. The experimental results show that the digital voltmeter has the advantages of simple structure, high measurement accuracy and low failure rate.

KEYWORDS

Digital voltmeter, Single chip computer, MCU