插线电路图
源码：
/*
控制共阴极数码管显示数字0到9
*/
//设置控制各段的数字IO脚，具体几号引脚对应哪一段，来源为数码管官方引脚图。
int pin_a = 7;
int pin_b = 6;
int pin_c = 5;
int pin_d = 10;
int pin_e = 11;
int pin_f = 8;
int pin_g = 9;
int pin_p = 4;
//根据共阴极数码管段码表定义0~9显示的各段开关状态
int numTable[10][8] = {
//0为点亮，1为关闭
//a b c d e f g dp
{0, 0, 0, 0, 0, 0, 1, 1}, //0
{1, 0, 0, 1, 1, 1, 1, 1}, //1
{0, 0, 1, 0, 0, 1, 0, 1}, //2
{0, 0, 0, 0, 1, 1, 0, 1}, //3
{1, 0, 0, 1, 1, 0, 0, 1}, //4
{0, 1, 0, 0, 1, 0, 0, 1}, //5
{0, 1, 0, 0, 0, 0, 0, 1}, //6
{0, 0, 0, 1, 1, 1, 1, 1}, //7
{0, 0, 0, 0, 0, 0, 0, 1}, //8
{0, 0, 0, 0, 1, 0, 0, 1}, //9
};
void setup()
{
for (int i = 4; i <= 11; i++)
{
pinMode(i, OUTPUT); //设置4～11引脚为输出模式
}
}
void loop()
{
for (int i = 0; i < 10; i++)//以此显示数字0到9
{
digitalWrite(pin_a, numTable[i][0]); //设置a 引脚的电平
digitalWrite(pin_b, numTable[i][1]); //设置b 引脚的电平
digitalWrite(pin_c, numTable[i][2]); //设置c 引脚的电平
digitalWrite(pin_d, numTable[i][3]); //设置d 引脚的电平
digitalWrite(pin_e, numTable[i][4]); //设置e 引脚的电平
digitalWrite(pin_f, numTable[i][5]); //设置f 引脚的电平
digitalWrite(pin_g, numTable[i][6]); //设置g 引脚的电平
digitalWrite(pin_p, numTable[i][7]); //设置dp引脚的电平
delay(1000);
}
}
来源：oschina
链接：https://my.oschina.net/u/1156250/blog/4254620