本设计以AT89S52单片机为核心控制芯片，实现数控直流电源功能的方案。设计采用8位精度的DA转换器DAC0832、三端可调稳压器LM350和一个UA741运算放大器构成稳压源，实现了输出电压范围为0V～+9.9V，电压步进0.1V的数控稳压电源，最大纹波只有10mV，具有较高的精度与稳定性。-The design AT89S52 microcontroller as the core control chip, digital DC power supply features program. Design uses 8-bit precision DA converter DAC0832, LM350 three-terminal adjustable regulator and pose a UA741 op-amp voltage source to achieve the output voltage range of 0V ~+9.9 V, 0.1V step voltage regulator NC power, the maximum ripple is only 10mV, with high precision and stability.