系统由模拟电源、控制电路、数模转换电路、放大电路、显示电路等部分构成，输出0-12V电压范围，步进值为0.1V的直流电源，并且具有掉电存储等功能。-System consists of analog power control circuit, digital to analog conversion circuit, amplifier circuit, the display part of the circuit, etc., 0-12V output voltage range is 0.1V DC power stepper, and a power-down storage and other functions.