程式碼

/**********************************************/
const int keyPin = 13; //the "s" of relay module attach to
const int laserPin = 7;
/**********************************************/
void setup()
{
  pinMode(laserPin, OUTPUT); //initialize relay as an output
  pinMode(keyPin, INPUT);
}
/***********************************************/
void loop()
{
  boolean Value=digitalRead(keyPin);
  if(Value==HIGH){
    digitalWrite(laserPin, LOW); //disconnect the relay   
  }else
    digitalWrite(laserPin, HIGH); //Close the relay
}
/*************************************************/


 

接線圖