基于c8051f020单片机的控制数字电位器的程序，对于那些制作可控增益的运放的学生们，利用数字电位器来控制增益，从而实现程控运放。-Microcontroller based c8051f020 program control digital potentiometer, for those who make the op amp gain control of students are using digital potentiometers to control the gain, in