1.一種LED顯示定時(shí)電路,其特征在于,所述電路中5V電源經(jīng)二極管VD1接電阻R2,電阻R2接定時(shí)器IC的端口6,同時(shí)電阻R2經(jīng)開(kāi)關(guān)S1接地,二極管VD1經(jīng)電阻R3接定時(shí)器IC的端口25,同時(shí)電阻R3經(jīng)開(kāi)關(guān)S2接地,二極管VD1經(jīng)分別電容C1和電容C2接地,二極管VD1接晶體管V2的發(fā)射極,同時(shí)晶體管V2的集電極接LED時(shí)鐘顯示屏的端口5,晶體管V2的基極經(jīng)電阻R7接定時(shí)器IC的端16,二極管VD1接晶體管V3的發(fā)射極,同時(shí)晶體管V3的集電極接LED時(shí)鐘顯示屏的端口23,晶體管V3的基極經(jīng)電阻R8接定時(shí)器IC的端口15,二極管VD1接晶體管V4的發(fā)射極,晶體管V4的集電極接LED時(shí)鐘顯示屏的端口24,晶體管V4的基極經(jīng)電阻R9接定時(shí)器IC的端14,LED時(shí)鐘顯示屏的端口VL2經(jīng)電阻R4接定時(shí)器IC端口7,同時(shí)電阻R4接開(kāi)關(guān)S3,LED時(shí)鐘顯示屏的端口1接晶體管V1的集電極,晶體管V1的基極經(jīng)電阻R6接定時(shí)器IC的端口17,晶體管V1的發(fā)射極經(jīng)電阻R5接定時(shí)器IC端口8,同時(shí)電阻R5接開(kāi)關(guān)S4,開(kāi)關(guān)S1、S2、S3及S4同時(shí)接地,LED時(shí)鐘顯示屏的端口4經(jīng)電阻a接定時(shí)器IC的端口18,LED時(shí)鐘顯示屏的端口27經(jīng)電阻b接定時(shí)器IC的端口19,LED時(shí)鐘顯示屏的端口20,LED時(shí)鐘顯示屏的端口7經(jīng)電阻c接定時(shí)器IC的端口21,LED時(shí)鐘顯示屏的端口8經(jīng)電阻d接定時(shí)器IC的端口21,LED時(shí)鐘顯示屏的端口22經(jīng)電阻e接定時(shí)器IC的端口22,LED時(shí)鐘顯示屏的端口26經(jīng)電阻f接定時(shí)器IC的端口23,LED時(shí)鐘顯示屏的端口25經(jīng)電阻g接定時(shí)器IC的端口24,同時(shí)LED時(shí)鐘顯示屏的端口2經(jīng)電阻R10接定時(shí)器IC的端口9,LED時(shí)鐘顯示屏的端口3經(jīng)電阻R11接定時(shí)器IC的端口13,LED時(shí)鐘顯示屏的端口10經(jīng)電阻R12接定時(shí)器IC的端口11,LED時(shí)鐘顯示屏的端口29經(jīng)電阻R13接定時(shí)器IC的端口10,定時(shí)器IC的端口1經(jīng)電阻R13接定時(shí)器IC的端口28,定時(shí)器IC的端口2經(jīng)二極管VD3接定時(shí)器IC的端口28,同時(shí)定時(shí)器IC的端口28經(jīng)電容C3接地,定時(shí)器IC的端口28經(jīng)開(kāi)關(guān)S5接地,定時(shí)器IC的端口26與定時(shí)器IC的端口27之間連接晶振Y,定時(shí)器IC的端口26經(jīng)電容C4接地,定時(shí)器IC的端口27經(jīng)電容C5接地,定時(shí)器IC的端口4直接地,定時(shí)器IC的端口12經(jīng)電阻R15接晶體管V5的基極,晶體管V5的集電極經(jīng)二極管VD4接5V電源,晶體管V5的集電極經(jīng)繼電器K接5V電源,同時(shí)晶體管V5的集電極經(jīng)發(fā)光二極管VL5接電阻R16,電阻R16接5V電源,晶體管V5的發(fā)射極基地,電路中5V電源經(jīng)二極管VD2接二極管VD3,同時(shí)二極管VD2經(jīng)電容C6接地,二極管VD2經(jīng)電容C7接地,二極管VD2經(jīng)電阻R1接直流電源GB正極,直流電源GB負(fù)極直接接地。
2.根據(jù)權(quán)利要求1所述的一種LED顯示定時(shí)電路,其特征在于,所述定時(shí)器IC采用C6610A型4位共陽(yáng)極動(dòng)態(tài)時(shí)鐘顯示屏,LED時(shí)鐘顯示屏采用LR6838型定時(shí)器專(zhuān)用集成電路。