可调节篮球比赛定时器,毕业设计实验报告,multisim仿真,AD09原理图及PCB图

上传者: 46370125 | 上传时间: 2024-01-14 20:50:07 | 文件大小: 5.64MB | 文件类型: RAR
用小规模集成电路设计24秒倒计时电路; 1 用555定时器产生1Hz的标准脉冲信号; 1 当计时器显示00,同时报警; 1 计时器应具有清零、启动、暂停/继续计时等控制功能。 1 并用相关仿真软件对电路进行仿真,并制出SCH和PCB图 1 2 设计方案 2 2.1整体设计思路及其设计框图 2 2.2元器件选择 3 2.2.1 计数器芯片74ls192 3 2.2.2 七段共阴极数码管译码芯片74ls48 4 2.2.3七段共阴极数码 5 2.2.4 NE555振荡电路 5 2. 2. 5 DSWPK_4 6 3 单元电路设计 7 3.1 倒计时电路 7 3.2 CP脉冲信号控制电路 7 3.3 时钟电路模块(555振荡电路) 7 3.4 控制电路及报警电路 8 4 Multisim电路仿真电路 9 5 AD09仿真的SCH图和PCB图 12 结论 13 附录 14

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