This content originally appeared on flaviocopes.com and was authored by flaviocopes.com
In this project we’re going to use the Arduino to generate a sound using an active buzzer.
First connect the buzzer to a wire:
The buzzer has a + pole, I used the red wire for that (a good habit).
Then connect the - wire to GND on the Arduino, and the + wire to a digital output pin, in this case I picked pin #9:
Now we switch to the Arduino program. To generate a sound we need to write a HIGH value to the buzzer + pin, delay for a tiny amount of time, for example a millisecond, then write a LOW value on the same pin:
int delay_ms = 5;
int buzzer_pin = 9;
void setup() {
pinMode(buzzer_pin, OUTPUT);
}
void loop() {
digitalWrite(buzzer_pin, HIGH);
delay(delay_ms);
digitalWrite(buzzer_pin, LOW);
delay(delay_ms);
}Load the program on the Arduino and the buzzer will emit a low sound.
Try changing the delay_ms variable value to change the sound.
You can then go fancy by making it play different sounds, with a program like this:
int buzzer_pin = 9;
void setup() {
pinMode(buzzer_pin, OUTPUT);
}
void play(int ms, int delay1, int delay2) {
for (int i = 1; i <= ms; i++) {
digitalWrite(buzzer_pin, HIGH);
delay(delay1);
digitalWrite(buzzer_pin, LOW);
delay(delay2);
}
}
void loop() {
play(100, 1, 1);
play(100, 2, 2);
play(100, 1, 1);
play(100, 2, 2);
play(100, 1, 1);
play(50, 2, 1);
play(100, 3, 2);
play(100, 4, 4);
}
This content originally appeared on flaviocopes.com and was authored by flaviocopes.com
flaviocopes.com | Sciencx (2021-03-25T05:00:00+00:00) Arduino project: use an active buzzer. Retrieved from https://www.scien.cx/2021/03/25/arduino-project-use-an-active-buzzer/
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