用74LS160设计电子表，显示时、分、秒，有校时、校分功能-74LS160 design using spreadsheet, showing hours, minutes, seconds, there is school, school sub-functions

交通灯课程设计:本设计是基于数字电路芯片完成的，内有Multisim仿真电路（已验证通过），具体设计说明书，基本思路采用74LS160十进制加法计数器来产生四种交通灯状态，计数器是由多功能计数器555产生的1Hz的秒脉冲驱动，希望能对你有所帮助。(Traffic light course design: This design is based on the digital circuit chip, with Multisim Simulation circuit (verified), th