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Grove - Passive Buzzer

This is a 3-5V passive buzzer. You can change the PMW frequency to award different beep sound to get a "buzzer music". Also, the buzzer can be set as an alarm for security applications. So get one and start your own project!

Features

  • Passive: Tunable passive buzzer
  • Interface: Grove

Specification

Item Value
Voltage range 3V–5V
Resonant Frequency 2700 Hz
sound output > 80dB
Working temperature -20-70 °C
Dimensions 20mm * 20mm * 10mm
Weight 3g
Battery Exclude

Platform Supported

Arduino Raspberry Pi

Getting Started

Play with Arduino

Materials Required

Seeeduino XIAO Grove Breadboard Grove Passive Buzzer
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Hardware Connection

The Grove interface on the breadboard and on the Grove Passive Buzzer are connected by the Grove cable.

Software

  • Step1 Copy the code below to the Arduino IDE and upload. If you do not know how to update the code, please check How to upload code.

Code example1 - simply get the beep sound

int buzzer = 5; // Buzzer connect with Pin 5
int frequency = 2700; //reach the Resonant Frequency
int cycle = 1000000/frequency;  
void setup()
{
Serial.begin(9600); // set the baud rate
pinMode(buzzer,OUTPUT); // set buzzer as output
}

void loop() 
{
  digitalWrite(buzzer,HIGH);
  delayMicroseconds(cycle/2);
  digitalWrite(buzzer,LOW);
  delayMicroseconds(cycle/2);  // run the PMW cycle
}
  • Step2 After uploading the code tp the board, you will hear thr buzzer beep.

Code example2 - Use buzzer to play music

 //set the corresponding notes with frequency
 #define NOTE_D0 0
 #define NOTE_D1 294
 #define NOTE_D2 330
 #define NOTE_D3 350
 #define NOTE_D4 393
 #define NOTE_D5 441
 #define NOTE_D6 495
 #define NOTE_D7 556

 #define NOTE_DL1 147
 #define NOTE_DL2 165
 #define NOTE_DL3 175
 #define NOTE_DL4 196
 #define NOTE_DL5 221
 #define NOTE_DL6 248
 #define NOTE_DL7 278

 #define NOTE_DH1 589
 #define NOTE_DH2 661
 #define NOTE_DH3 700
 #define NOTE_DH4 786
 #define NOTE_DH5 882
 #define NOTE_DH6 990
 #define NOTE_DH7 112

 #define WHOLE 1
 #define HALF 0.5
 #define QUARTER 0.25
 #define EIGHTH 0.25
 #define SIXTEENTH 0.625

 //the note part of the whole song
 int tune[] =
 {
   NOTE_DH1, NOTE_D6, NOTE_D5, NOTE_D6, NOTE_D0,
   NOTE_DH1, NOTE_D6, NOTE_D5, NOTE_DH1, NOTE_D6, NOTE_D0, NOTE_D6,
   NOTE_D6, NOTE_D6, NOTE_D5, NOTE_D6, NOTE_D0, NOTE_D6,
   NOTE_DH1, NOTE_D6, NOTE_D5, NOTE_DH1, NOTE_D6, NOTE_D0,

   NOTE_D1, NOTE_D1, NOTE_D3,
   NOTE_D1, NOTE_D1, NOTE_D3, NOTE_D0,
   NOTE_D6, NOTE_D6, NOTE_D6, NOTE_D5, NOTE_D6,
   NOTE_D5, NOTE_D1, NOTE_D3, NOTE_D0,
   NOTE_DH1, NOTE_D6, NOTE_D6, NOTE_D5, NOTE_D6,
   NOTE_D5, NOTE_D1, NOTE_D2, NOTE_D0,
   NOTE_D7, NOTE_D7, NOTE_D5, NOTE_D3,
   NOTE_D5,
   NOTE_DH1, NOTE_D0, NOTE_D6, NOTE_D6, NOTE_D5, NOTE_D5, NOTE_D6, NOTE_D6,
   NOTE_D0, NOTE_D5, NOTE_D1, NOTE_D3, NOTE_D0,
   NOTE_DH1, NOTE_D0, NOTE_D6, NOTE_D6, NOTE_D5, NOTE_D5, NOTE_D6, NOTE_D6,
   NOTE_D0, NOTE_D5, NOTE_D1, NOTE_D2, NOTE_D0,
   NOTE_D3, NOTE_D3, NOTE_D1, NOTE_DL6,
   NOTE_D1,
   NOTE_D3, NOTE_D5, NOTE_D6, NOTE_D6,
   NOTE_D3, NOTE_D5, NOTE_D6, NOTE_D6,
   NOTE_DH1, NOTE_D0, NOTE_D7, NOTE_D5,
   NOTE_D6,
 };

 //the duration time of each note
 float duration[] =
 {
   1, 1, 0.5, 0.5, 1,
   0.5, 0.5, 0.5, 0.5, 1, 0.5, 0.5,
   0.5, 1, 0.5, 1, 0.5, 0.5,
   0.5, 0.5, 0.5, 0.5, 1, 1,

   1, 1, 1 + 1,
   0.5, 1, 1 + 0.5, 1,
   1, 1, 0.5, 0.5, 1,
   0.5, 1, 1 + 0.5, 1,
   0.5, 0.5, 0.5, 0.5, 1 + 1,
   0.5, 1, 1 + 0.5, 1,
   1 + 1, 0.5, 0.5, 1,
   1 + 1 + 1 + 1,
   0.5, 0.5, 0.5 + 0.25, 0.25, 0.5 + 0.25, 0.25, 0.5 + 0.25, 0.25,
   0.5, 1, 0.5, 1, 1,
   0.5, 0.5, 0.5 + 0.25, 0.25, 0.5 + 0.25, 0.25, 0.5 + 0.25, 0.25,
   0.5, 1, 0.5, 1, 1,
   1 + 1, 0.5, 0.5, 1,
   1 + 1 + 1 + 1,
   0.5, 1, 0.5, 1 + 1,
   0.5, 1, 0.5, 1 + 1,
   1 + 1, 0.5, 0.5, 1,
   1 + 1 + 1 + 1
 };

 int length;//define the number of notes
 int buzzer = 5; //set the buzzer Pin
 void setup()
 {
   pinMode(buzzer, OUTPUT); // set the buzzer as output mode
   length = sizeof(tune) / sizeof(tune[0]); //count the number of note
 }

 void loop()
 {
    for (int x = 0; x < length; x++) //"sing" the note one by one
    {
     tone(buzzer, tune[x]); //output the "x" note
     delay(400 * duration[x]); //rythem of the music,it can be tuned fast and slow by change the number"400"
     noTone(buzzer);//stop the current note and go to the next note
    } 
    delay(5000);//after playing the whole song, delay for 5 sec
 }    
  • Step3 After uploading the code to the board, you can hear a music from the buzzer.

Play with Raspberry Pi

Materials Requied

Raspberry Pi 4B(4GB) Grove Base Hat for Raspberry Pi Grove Digital PIR Motion Sensor
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Hardware Connection

Connect the Buzzer with "PWM" on the Grove Base Hat.

Software Code

  • Step 1 Install Grove.py on your Raspberry.

curl -sL https://github.com/Seeed-Studio/grove.py/raw/master/install.sh | sudo bash -s -
git clone https://github.com/Seeed-Studio/grove.py

  • Step 2 Create a python file for the code.
cd grove.py
nano example.py
  • Step 3 Copy the following code to the python file
#!/usr/bin/env python
import time
from mraa import getGpioLookup
from upm import pyupm_buzzer as upmBuzzer

def main():
    # Grove - Buzzer connected to PWM port
    buzzer = upmBuzzer.Buzzer(getGpioLookup('GPIO12'))

    CHORDS = [upmBuzzer.BUZZER_DO, upmBuzzer.BUZZER_RE, upmBuzzer.BUZZER_MI, 
        upmBuzzer.BUZZER_FA, upmBuzzer.BUZZER_SOL, upmBuzzer.BUZZER_LA, 
        upmBuzzer.BUZZER_SI]
    for i in range(0, len(CHORDS)):
        buzzer.playSound(CHORDS[i], 500000)
        time.sleep(0.1)

    del buzzer
    print('application exiting...')

if __name__ == '__main__':
    main()
  • Step 4 Run the program

sudo chmod +x example.py
sudo ./example.py
If everything goes well, you can hear"do,re,mi,fa,so.la.xi".

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