Passive Buzzer Module

This passive buzzer module is your tool for adding sound and melodies to electronic creations! Unlike active buzzers that emit only a single fixed tone, this passive module is fully controlled by a microcontroller (like Arduino) via a PWM signal. This gives you full creative control – you can generate different pitches, program entire tunes, or create custom sound alerts for alarms and notifications. With its compact size and operating voltage of 3.3V - 5V, it is the perfect choice for educational projects, smart gadgets, toys, or any interactive system that needs to "speak up".

The module is ready to use – it often includes a built-in current-limiting resistor and can be easily connected with jumper wires to your board.

Key Specifications:

• Type: Passive Buzzer (no internal oscillator)

• Operating Voltage: 3.5V - 5.5V

• Operating Current: < 25 mA

• Control: Via external PWM signal (square wave)

• Recommended Driving Frequency Range: 2 kHz – 5 kHz

• Module (PCB) Dimensions: 18.5 mm (L) x 15 mm (W)

• Compatibility: Arduino, Raspberry Pi, ESP8266/ESP32 and other microcontrollers.

Specification:

Working voltage: 3.5-5.5V
Working current: <25mA
PCB Dimension: 18.5mm x 15mm(L x W)

Feature:

No oscillation source, need square wave (frequency 2K-5K ) to drive.
Sound frequency control, you can make a "do re mi fa sol la si" effect.

Package included:

1 x Standard Passive Buzzer Module

reference source programme:

int buzzer=8;// Set the control the buzzer digital IO pin
void setup()
{
pinMode(buzzer,OUTPUT);// Setting the digital IO pin mode , OUTPUT is Wen out
}
void loop()
{
unsigned char i,j;// Define the variable
while(1)
{
for(i=0;i<80;i++)// Wen a frequency sound
{
digitalWrite(buzzer,HIGH);// Sound
delay(1);//delay 1ms
digitalWrite(buzzer,LOW);//Not sound
delay(1);// delay 1ms
}
for(i=0;i<100;i++)// Wen out another frequency sound
{
digitalWrite(buzzer,HIGH);// Sound
delay(2);//delay 2ms
digitalWrite(buzzer,LOW);// Not sound
delay(2);//delay 2ms
}
}
}