hi
i need help for this project, i searched in net i got one circuit diagram so i am using that circuit diagram please see the circuit diagram so i want to use 8051 microcontroller to do this project so i am clear about hardware but i can't understand the concept of adc process why using adc converstion in this project why i am asking means ,i circuit the digital pot used so i am giving the signal to that ic using the mc.but in circuit from output line take the line and feed to the controller that lines are adc lines.so please explain the concept of this project.