材料:Arduino主板一個、雙公頭杜邦線10條、麵包板一個、七段顯示器一個。
效用:利用七段顯示器重複顯示從9~0的倒數。
應用:籃球比賽時所使用的倒數計時器。
電路接法:
程式碼:
void setup(){
pinMode(2,OUTPUT);
pinMode(3,OUTPUT);
pinMode(4,OUTPUT);
pinMode(5,OUTPUT);
pinMode(6,OUTPUT);
pinMode(7,OUTPUT);
pinMode(8,OUTPUT);
pinMode(9,OUTPUT);
digitalWrite(9,0);
}
void loop(){
digitalWrite(2,1);
digitalWrite(3,1);
digitalWrite(4,1);
digitalWrite(5,0);
digitalWrite(6,0);
digitalWrite(7,1);
digitalWrite(8,1);
delay(1000);
digitalWrite(2,1);
digitalWrite(3,1);
digitalWrite(4,1);
digitalWrite(5,1);
digitalWrite(6,1);
digitalWrite(7,1);
digitalWrite(8,1);
delay(1000);
digitalWrite(2,1);
digitalWrite(3,1);
digitalWrite(4,1);
digitalWrite(5,0);
digitalWrite(6,0);
digitalWrite(7,0);
digitalWrite(8,0);
delay(1000);
digitalWrite(2,1);
digitalWrite(3,0);
digitalWrite(4,1);
digitalWrite(5,1);
digitalWrite(6,1);
digitalWrite(7,1);
digitalWrite(8,1);
delay(1000);
digitalWrite(2,1);
digitalWrite(3,0);
digitalWrite(4,1);
digitalWrite(5,1);
digitalWrite(6,0);
digitalWrite(7,1);
digitalWrite(8,1);
delay(1000);
digitalWrite(2,0);
digitalWrite(3,1);
digitalWrite(4,1);
digitalWrite(5,0);
digitalWrite(6,0);
digitalWrite(7,1);
digitalWrite(8,1);
delay(1000);
digitalWrite(2,1);
digitalWrite(3,1);
digitalWrite(4,1);
digitalWrite(5,1);
digitalWrite(6,0);
digitalWrite(7,0);
digitalWrite(8,1);
delay(1000);
digitalWrite(2,1);
digitalWrite(3,1);
digitalWrite(4,0);
digitalWrite(5,1);
digitalWrite(6,1);
digitalWrite(7,0);
digitalWrite(8,1);
delay(1000);
digitalWrite(2,0);
digitalWrite(3,1);
digitalWrite(4,1);
digitalWrite(5,0);
digitalWrite(6,0);
digitalWrite(7,0);
digitalWrite(8,0);
delay(1000);
digitalWrite(2,1);
digitalWrite(3,1);
digitalWrite(4,1);
digitalWrite(5,1);
digitalWrite(6,1);
digitalWrite(7,1);
digitalWrite(8,0);
delay(4000);
}