【正文】 r in the button pressed, number immediately latched, and displays the number of players in the digital tube, at the same time, the buzzer gives voice prompts, and blockade of circuit, the prohibition of other players strong strong, priority number of players has remained to host the system is clear. In addition, responder has the timing responder function, and one answer in the time can be set by the host. When the host starts the start button, the timer to reduce the time requirements, and display。該搶答器具有電路簡單、成本較低、操作方便、靈敏可靠等優(yōu)點(diǎn)，使用效果良好，具有較高的推廣價(jià)值。當(dāng)節(jié)目主持人啟動(dòng)“開始”鍵后，要求定時(shí)器立即減計(jì)時(shí)，并用顯示器顯示；參賽選手在設(shè)定的時(shí)間內(nèi)搶答，搶答有效，定時(shí)器停止工作，數(shù)碼管上顯示選手的編號(hào)和搶答時(shí)刻的時(shí)間，并保持到主持人將系統(tǒng)清零為止。該搶答器具有數(shù)據(jù)鎖存和顯示的功能，即搶答開始后，若有選手按下?lián)尨鸢粹o，編號(hào)立即鎖存，并在數(shù)碼管上顯示選手的編號(hào)，同時(shí)蜂鳴器給出聲音提示，并且封鎖輸入電路，禁止其他選手強(qiáng)大，優(yōu)先強(qiáng)大選手的編號(hào)一直保持到主持人將系統(tǒng)清零為止。本次設(shè)計(jì)的電路可以分成搶答電路、可預(yù)置時(shí)間的定時(shí)電路、時(shí)鐘產(chǎn)生和時(shí)序控制電路、報(bào)警控制電路、電源電路等幾個(gè)模塊。目 錄摘 要 ................................................................................................................................1ABSTRACT...........................................................................................................................2第一章 設(shè)計(jì)任務(wù) ................................................................................................................3 基本設(shè)計(jì) .................................................................................................................3 基本功能 .................................................................................................................3 擴(kuò)展功能 .................................................................................................................3第二章 方案設(shè)計(jì) ..................................................................................................................4第三章 硬件電路設(shè)計(jì) ..........................................................................................................4 八路搶答器的電路框圖 .........................................................................................4 八路搶答器的硬件電路 .........................................................................................5 時(shí)鐘電路 ......................................................................................................6 復(fù)位電路 ......................................................................................................7 主控制系統(tǒng)模塊/最小系統(tǒng) ........................................................................7 顯示電路 ......................................................................................................9 報(bào)警電路 ......................................................................................................9 電源模塊 ....................................................................................................10 按鍵輸入電路 ............................................................................................10第四章 軟件設(shè)計(jì) ..............................................................................................................11第五章 仿真 ......................................................................................................................13第六章 設(shè)計(jì)總結(jié) ..............................................................................................................15致謝 ..................................................................................................................................15參考文獻(xiàn) ..............................................................................................................................16附 錄 程序 ......................................................................................................................161摘要隨著生活水平的提高，人們的娛樂生活也越來越豐富，各類比賽也隨之增多，對(duì)搶答器的要求也就越來越高，搶答器的公平公正就顯得特別重要。為了滿