设计倒计时交通灯硬件电路,包含两位数码管,键盘以及东西,南北路口红绿...答:include <reg51.h> include <stdio.h> define uchar unsigned char define uint unsigned int uchar h;uint r=0;uint s;uchar code dis[]={0Xc0,0Xf9,0Xa4,0Xb0,0X99,0X92,0X82,0Xf8,0X80,0X90,0Xff,};/*0*//*1*//*2*//*3*//*4*//*5*//*6*//*7*//*8*//...
简易交通灯电路的设计(74LS161、74LS138、门电路)答:先用门电路构成一个 1/5Hz的CP时基振汤器。CP输入到74ls161构成模5计数器,即输出(D,C,B,A)=0000,0001,0010,0011,0111後经门电路组合置数从0000再开始重数。74161的三个输出ABC输入到74138对应输入端,而对应的顺序输出为Y0',Y1',Y2',Y3',Y4',Yo'Y1'并上接红LED,Y2'接黄LED,Y3'...