【正文】
的設(shè)計(jì)紅外線發(fā)射電路:下圖是紅外線發(fā)射電路,圖中的MIC是一種常用的動(dòng)圈式話筒,其輸出阻抗為20000(高阻動(dòng)圈式 話筒)。以下是我們的模塊流程圖:經(jīng)過我們小組討論一直覺得此方案既容易實(shí)現(xiàn)成本也很低,還符合廢物利用的原則。以下是紅外光發(fā)送模塊和接收模塊電路原理圖: 說明:此方案看似簡(jiǎn)單,但經(jīng)過我們小組的測(cè)試發(fā)送模塊很難成功處理聲音信號(hào),所以不用此方案。方案二:電壓放大法首先主要用KD9300芯片構(gòu)成音樂產(chǎn)生電路,發(fā)出電信號(hào),再經(jīng)過一個(gè)分壓式共射電路適當(dāng)放大信號(hào),并通過LED紅外發(fā)送管轉(zhuǎn)化為光信號(hào)發(fā)送。接收部分采用一種高效能的紅外接收器——德律風(fēng)根TFMS5380組件內(nèi)已裝上了接收二級(jí)管和前置放大器。由單片機(jī)的異步串行口TX輸出的串行數(shù)據(jù)信號(hào),送到與非門74HC00的輸入端。AbstractThis device uses infrared light munication system, which by the sound electric conversion module, the infrared light transmitting module, an infrared light receiving module and the electric acoustic conversion module of four parts. To achieve the sound signal generation, transmission, reception and filtering to achieve the sound eliminate interference and power amplification. Using audio jack line input speech signal, headphone output speech signal, using protel software designed to send and receive voice circ