2019-04-23 arduino 04-05 按钮与抢答器

4、按键实验

• 接线图

  
  
  接线

• 程序模块

  
  
  模块

• 源程序

  
  
  程序

void setup(){
  pinMode(4,INPUT);  //define the input
  pinMode(10,OUTPUT); //define the output
}

void loop(){
  if(digitalRead(4)==HIGH){
    digitalWrite(10,HIGH);
    delay(5000);
  }             //if 4 is high,then 10 is high for 5s
  else{
    digitalWrite(10,LOW);  //else 10 is low
  }
}

• 实例

  
  
  实例

5、抢答器

• 连线

  
  
  连线

• 模块

  
  
  模块[图片上传中...(image-367484-1556029699323)]

• IDE

  
  
  IDE

void setup(){
  pinMode(8,OUTPUT);
  pinMode(7,OUTPUT);
  pinMode(6,OUTPUT);
  pinMode(5,INPUT);
  pinMode(4,INPUT);
  pinMode(3,INPUT);
  pinMode(2,INPUT);
}
void loop(){
  if(digitalRead(5)==LOW)RED_YES();
  if(digitalRead(4)==LOW)YELLOW_YES();
  if(digitalRead(3)==LOW)GREEN_YES();
}
void RED_YES(){
  while(digitalRead(2)==1){
    digitalWrite(8,HIGH);
    digitalWrite(7,LOW);
    digitalWrite(6,LOW);
  }
  clear_led();
}
void YELLOW_YES(){
  while(digitalRead(2)==1){
    digitalWrite(8,LOW);
    digitalWrite(7,HIGH);
    digitalWrite(6,LOW);
  }
  clear_led();
}
void GREEN_YES(){
  while(digitalRead(2)==1){
    digitalWrite(8,LOW);
    digitalWrite(7,LOW);
    digitalWrite(6,HIGH);
  }
  clear_led();
}
void clear_led(){
  digitalWrite(8,LOW);
  digitalWrite(7,LOW);
  digitalWrite(6,LOW);
}

• 实例

  
  
  实例