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// 距離が10cmより小さくなるとLEDが光る | |
#define echoPin 11 //距離センサーの「echo」が11番ピン | |
#define trigPin 12 //距離センサーの「trig」が12番ピン | |
#define ledPin 2 //光が3番ピン | |
double Duration = 0; //受信した間隔 | |
double Distance = 0; //距離 | |
void setup() { | |
Serial.begin(9600); | |
pinMode(ledPin, OUTPUT); | |
pinMode(echoPin,INPUT); | |
pinMode(trigPin,OUTPUT); | |
} | |
void loop() { | |
digitalWrite(trigPin, LOW); | |
delayMicroseconds(2); | |
digitalWrite(trigPin, HIGH); //超音波を出力 | |
delayMicroseconds(10); | |
digitalWrite(trigPin, LOW); | |
Duration = pulseIn(echoPin, HIGH); //センサからの入力 | |
if (Duration > 0) { | |
Duration = Duration/2; //往復距離を半分 | |
Distance = Duration*340*100/1000000; //音速を340m/sに設定 | |
Serial.print("Distance:"); | |
Serial.print(Distance); | |
Serial.println("cm"); | |
} | |
if (Distance < 10 ) { //Distance<15(15cmより小さい)→<、>と数値の変更ができます。 | |
digitalWrite(ledPin, HIGH); //HIGH:光る LOW:光らない | |
delay(200); | |
} else { | |
digitalWrite(ledPin, LOW); //HIGH:光る LOW:光らない | |
delay(200); | |
} | |
} |
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