用EPROM27128组成LED环形模拟量时钟线显示

The LED Circular Analog Clock Display Com-posed of EPROM 27128

在一圆周上,用时、分、秒的显示指示实现仿模拟指针式的时钟。介绍时钟工作原理及组成,并详细分析了“秒”和“分”脉冲发生器、时钟线显示和时钟校正电路的工作原理。

The paper introduces a simulated analog clock implemented by 'HOUR', 'MIN', and'SEC' indication lines on a circle. The operational principle and composition of the clock are presented and the 'MIN', 'SEC' pulse generators, clock display as well as the operational principle of the correction circuit are analysed in detail.