霓虹灯的电路图: 
霓虹灯的51单片机程序: #include <reg52.h> #define uchar unsigned char #define uint unsigned int sbit RED_LED = P1^0; //端口定义. sbit GREEN_LED = P1^1; sbit YELLOW_LED = P1^2; uint flicker,i,n; void int0() { TMOD=0x01; TH0=0x3C; TL0=0xAF; TR0=1; //启动定时器。 ET0=1; //开定时器中断. EA=1; //开总中断 } void main() //主函数。 { n=0; i=0; GREEN_LED=1; YELLOW_LED=1; flicker=0; int0(); while(1) { if(0<=n&&n<20) { YELLOW_LED=1; GREEN_LED=1; RED_LED=flicker; } if(20<=n&&n<40) { RED_LED=1; YELLOW_LED=1; GREEN_LED=flicker; } if(40<=n&&n<60) { RED_LED=1; GREEN_LED=1; YELLOW_LED=flicker; if(n==59) n=0; } } } void Time0() interrupt 1 { TR0=0; i++; if(i==10) { flicker=~flicker; i=0; n++; } TH0=0x3C; TL0=0xAF; TR0=1; } 下面是另一个用51单片机的霓虹灯2: 如果网页复制的代码无法编译成功可以从:http://www.ruidan.com/f/nhddpj_c.rar 这个链接下载 #include <reg52.h> #define uchar unsigned char #define uint unsigned int uchar ss[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80, 0x00,0xff,0x00,0xff,0x00,0x01,0x03,0x06, 0x0c,0x18,0x30,0x60,0xc0,0x80,0x00,0xff, 0x00,0xff,0x00,0xff,0x00,0x01,0x03,0x07, 0x0e,0x1c,0x38,0x70,0xe0,0xc0,0x80,0x00, 0xff,0x00,0xff,0x00,0x01,0x03,0x07,0x0f, 0x1e,0x3c,0x78,0xf0,0xe0,0xc0,0x80,0xff, 0x00,0xff,0x00,0xff,0x00,0x78,0xf0,0xff, 0x00,0xff,0x00,0x80,0x40,0x20,0x10,0x08, 0x04,0x02,0x01,0xff,0x00,0xff,0x00,0xff, 0x00,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe, 0xff,0x7f,0x3f,0x1f,0x0f,0x07,0x03,0x01}; /*数组中为霓虹灯闪烁花样，单流水，双流水，三流水，四流水和倒流*/ uint m,n,i; void delay(m) { while(m--) for(i=0;i<120;i++); } void main() //主函数。 { while(1) { P1=ss[n]; P3=ss[n]; delay(400); P1=0x00; n++; if(n==96) n=0; } }