利用8051单片机和DAC0832控制电源的输出从0~9.9V，并且实现0.1v的步进电压。我们先利用变压电路实现稳定的输入电压，在单片机的控制下是啊先显示和键盘的操作，直接控制DAC0832从而实现了电压的变换。可以利用手动和自动扫描来实现，能有效地控制输出电压，并且实现数化显示电压值。-The use of 8051 and DAC0832 output power control from 0 ~ 9.9V, and the realization of the step voltage 0.1v. We first use of variable voltage circuit of the input voltage to achieve stability in the single-chip yes ah under the control of display and keyboard to operate in order to achieve direct control of the DAC0832 voltage change. Can make use of manual and automatic scanning to achieve, can effectively control the output voltage, and the realization of a number of shows that Voltage.