以AT89S51芯片为核心，辅以必要的电路，设计了一个简易的电子时钟，它由4.5V直流电源供电，通过数码管能够准确显示时间，调整时间，从而到达学习、设计、开发软、硬件的能力。-The AT89S51 chip as the core, supplemented by the necessary circuitry to design a simple electronic clock, which consists of 4.5V DC power supply, by digital control can accurately display the time, adjustment time, so get to learn, design, development software and hardware ability.