【導(dǎo)讀】二.交通控制燈設(shè)計(jì)方案與論證····································3. 計(jì)數(shù)器的工作情況···········································7. 控制信號燈的譯碼電路的真值表······························9. 五.譯碼顯示電路···············································10. 六.時(shí)基脈沖電路··················