Design of Switch of Current Source by Microcomputer

This paper presents the system of switch of current source by microcomputer. The power controled by microcomputer can own complete function in order to observe all the time. It depends on 89C51 and uses software to control the current on time and protect the current. Through ADC0808, it can display voltage and current to finish the function of control. In this way, it can save energy and improve the efficiency of electricity. All the system's key is microcomputer programming. It presents the important part of programming of setting time, displaying and A/D changing. By Proteus simulation, it completes these functions.