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Ultrasonic pest repeller
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int speaker = 0; // speaker pin (pwm) | |
long int pick_freq = 22000; | |
int duration = 100; // ms to play tone | |
int led = 13; // led operating status pin | |
void setup() { | |
pinMode(speaker, OUTPUT); | |
Serial.begin(9600); | |
Serial.println("ATMEGA BOOTING..."); | |
} | |
void loop() { | |
pick_freq = random(22000, 64000); | |
duration = random(100, 3000); | |
digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level) | |
Serial.print("Tone: Freq: "); Serial.print(pick_freq); Serial.print(" / Duration: "); Serial.println(duration); | |
tone(speaker, pick_freq); | |
delay(duration); | |
noTone(speaker); | |
digitalWrite(led, LOW); // turn the LED off (LOW is the voltage level) | |
delay(duration * 0.1); | |
} |
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