1目录一、设计目的.......................................................................................................................2二、设计任务与要求...........................................................................................................21、设计任务..........................................................................................................................................22、设计要求..........................................................................................................................................2三、四人智力竞赛抢答器电路原理及设计.......................................................................31、设计方案..........................................................................................................................................32、系统框图..........................................................................................................................................33、方案比较..........................................................................................................................................4方案1....................................................................................................................................................................4方案2:..................................................................................................................................................................4方案3：................................................................................................................................................................44、单元电路设计及元器件选择..........................................................................................................4（1）抢答电路.....................................................................................................................................................4（2）定时电路.....................................................................................................................................................7（3）报警电路.....................................................................................................................................................9（4）时序控制电路...........................................................................................................................................10（5）元器件列表...............................................................................................................................................125、四路抢答器总电路图....................................................................................................................13四、设计过程中的问题和解决办法.................................................................................13五、设计成品的优点与不足.............................................................................................14六、心得体会.........................................................................................................................14七、实物图.........................................................................................................................151、正面......................................................................................................................
