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- #define NOTE_C5 523
- #define NOTE_D5 587
- #define NOTE_E5 659
- int buzzer = 8;
- int key_C = 5;
- int key_D = 4;
- int key_E = 3;
- void setup()
- {
- pinMode(key_C, INPUT);
- pinMode(key_D, INPUT);
- pinMode(key_E, INPUT);
- pinMode(buzzer, OUTPUT);
- }
- void loop()
- {
- if (digitalRead(key_C) == HIGH) {
- tone(buzzer, NOTE_C5, 100);
- }
- if (digitalRead(key_D) == HIGH) {
- tone(buzzer, NOTE_D5, 100);
- }
- if (digitalRead(key_E) == HIGH) {
- tone(buzzer, NOTE_E5, 100);
- }
- delay(10);
- }
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