christmas_buzzer.ino

#include <Keyboard.h>

int outSound = 2;
int outFairyRight = 3;
int outFairyLeft = 4;
int inWire = 12;

int powerHigh = 22;
int outLED = 13;
int inButton = 51;

int previousButtonState = HIGH;
int pressKey = KEY_RETURN;
int delayBetweenKeys = 50;
int buttonState = LOW;

void setup()
{
    pinMode(outLED, OUTPUT);
    pinMode(outSound, OUTPUT);
    pinMode(outFairyRight, OUTPUT);
    pinMode(outFairyLeft, OUTPUT);
    pinMode(inWire, INPUT);
    pinMode(powerHigh, OUTPUT);
    digitalWrite(powerHigh, HIGH);
    pinMode(inButton, INPUT);
}

void loop()
{
    if (!digitalRead(inWire))
    {
        // When wire is touched
        digitalWrite(outSound, HIGH);
        digitalWrite(outFairyRight, HIGH);
        digitalWrite(outFairyLeft, HIGH);
    }
    else
    {
        digitalWrite(outSound, LOW);
        digitalWrite(outFairyRight, LOW);
        digitalWrite(outFairyLeft, LOW);
    }

    buttonState = digitalRead(inButton);

    // replaces button press with UP arrow
    if (buttonState == LOW && previousButtonState == HIGH)
    {
        // and it's currently pressed:
        Keyboard.press(pressKey);
        digitalWrite(outLED, HIGH);
        delay(delayBetweenKeys);
    }

    if (buttonState == HIGH && previousButtonState == LOW)
    {
        // and it's currently released:
        Keyboard.release(pressKey);
        digitalWrite(outLED, LOW);
        delay(delayBetweenKeys);
    }
    previousButtonState = buttonState;
}