Title the design of power switching controller based on AT89C51 single-chip microcomputer
Abstract
The design introduces a switching power supply system constituted by AT89C51 single chip microcomputer. It is a device that can automatically switch between different power supplys, to guarantee a certain way could automatically switch to another normal power in the event of failure, guaranteeing uninterrupted power supply or droped time with in the extent of permitted. The power switching devices must be responsive, reliable, multifunctional and acousto-optic characteristics. The design includes hardware circuit design and analysis, and software programming and analysis to switch automatically between main power and substitute power. Connection between ADC 0809 will be the first acquisition by the analog signal for analog-to-digital conversion after importation of SCM. SCM under control requires the input signal and the default standard signal contrast, If the sampling signal was inconsistent with the predetermined signal, the single chip will control relays for switching power supply. Meanwhile LEDs and loudspeakers work, sound and light warning issued . The low cost, high reliability, multi-mode, the wide working environment without special requirements of the system have important practical significance.
Keywords power switch uninterrupted power supply acousto-optic alarm
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