大小磁簧 磁场传感器

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int Led = 13;       //定义LED 接口
int buttonpin = 3;  //定义磁环传感器接口
int val;            //定义数字变量val
void setup() {
  pinMode(Led, OUTPUT);       //定义LED 为输出接口
  pinMode(buttonpin, INPUT);  //定义磁环传感器为输出接口
  pinMode(3, INPUT);
  Serial.begin(9600);
}
void loop() {
  int x = analogRead(A5);
  Serial.println(A5);
  val = digitalRead(buttonpin);  //将数字接口3的值读取赋给val
  if (val == HIGH)               //当磁环传感器检测有信号时，LED 闪烁
  {
    digitalWrite(Led, HIGH);
  } else {
    digitalWrite(Led, LOW);
  }
}