In this paper, the design of a based on AT89C51 microcontroller as the core controller of NC DC regulated power supply, the power supply mainly by auxiliary power supply, display circuit, control circuit, digital to analog conversion circuit, a voltage stabilizing circuit and analog digital conversion circuit of six parts composition. The system takes the AT89C51 single chip as the control unit, and the digital analog converter chip DAC0832 output reference voltage, and the sampling value is converted to digital signal by the analog digital conversion chip TLC1534. Auxiliary power supply to provide each chip, digital tube and amplifier working voltage, display circuit is used to display the size of the output voltage and the output voltage value can be through the buttons on the step control (+ 0.1V), and in the button for a long time pressed can increase or decrease.

0-30V可调直流稳压电源设计.docx

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