Author(s)

Wang Lu

Corresponding Author

Wang Lu

Abstract

the traditional DC power supply system is usually to control the output voltage according to the difference between the output voltage value and the benchmark value of the power supply, which is difficult to achieve and easy to be affected by the parameters, resulting in low control accuracy. This paper presents a power supply output voltage control method based on single chip microcomputer. SCM selects a cost-effective STC89C52 SCM, and the output voltage is collected through a voltage sensor. The voltage signal is transmitted to the SCM via the A/D converter. The LCD screen uses RT12864 and is connected with a single chip microcomputer. The single chip control results are transmitted to the RT12864 LCD for display. A / D conversion circuit is used to convert the output piezoelectric signal collected into a digital signal. The power supply output voltage is controlled by the single chip microcomputer controlling the A/D conversion circuit. The experimental results show that the proposed method has high control precision and robustness.

Keywords

MCU, Power supply, Output voltage, control