Keyestudio KS0077, Manual, Page: 30 / 142

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When connecting the circuit, pay attention to the positive and negative poles of the buzzer. In the
photo, you can see there are red and black lines. When the circuit is finished, you can begin the
programming.
Sample Code
Program is simple. You control the buzzer by outputting high/low level.
//////////////////////////////////////////////////////////
int buzzer=8;// initialize digital IO pin that controls the buzzer
void setup()
{
pinMode(buzzer,OUTPUT);// set pin mode as “output”
}
void loop()
{
digitalWrite(buzzer, HIGH); // produce sound
}
//////////////////////////////////////////////////////////
Result
After uploading the program, the buzzer experiment is completed. You can see the buzzer is
ringing.