Wiring the Passive & Active Buzzer with Raspberry Pi

Another illustration that demonstrate how to use the buzzer both passive and active. The difference between an active and passive is. The active buzzer has a built in oscillating source that will make a sound when amplifying a power compare to passive buzzer does not have such a source so it means that no beep or sound will generate when it plug to the power source on this case you need to use a square wave frequency to make a sound between 2k and 5k. As you can see diagram below there are two option to wire up the buzzer.
The active buzzer has onboard oscillating source it will beep as long as it is wired up but it can only beep with fixed frequency.

Required Component

Raspberry Pi / Banana Pi / Orange Pi (If your using Banana Pi or Orange Pi See first the GPIO Pins)
Buzzer Active / Passive Module
Solder Less Breadboard
Jumper Wire / DuPont Wire

Wiring Manually

10k Resistor /
NPN Transistor (2N222)
External Battery (5~9v)

Wiring Diagram

Uploading the Code

WiringPi Code for Active Buzzer

#include <wiringPi.h>
#include <stdio.h>

#define BuzzPin 7

int main(void)
{
if(wiringPiSetup() == -1){ // When wiringpi initialization failed printf "WiringPi Failed" 
printf("wiringPi initialization failed !");
return 1;
}
// printf("14CORE | RPI: GPIO %d(wiringPi pin)\n",SoundPin);

pinMode(BuzzPin, OUTPUT);

while(1){
digitalWrite(BuzzPin, HIGH);
delay(100);
digitalWrite(BuzzPin, LOW);
delay(100);
}

return 0;
}

#include <wiringPi.h>

#include <stdio.h>

#define BuzzPin 7

int main(void)

{

if(wiringPiSetup() == -1){ // When wiringpi initialization failed printf "WiringPi Failed"

printf("wiringPi initialization failed !");

return 1;

}

// printf("14CORE | RPI: GPIO %d(wiringPi pin)\n",SoundPin);

pinMode(BuzzPin, OUTPUT);

while(1){

digitalWrite(BuzzPin, HIGH);

delay(100);

digitalWrite(BuzzPin, LOW);

delay(100);

}

return 0;

}

Python Code for Active Buzzer

#!/usr/bin/env python
import RPi.GPIO as GPIO
import time

BuzzPin = 11 # Raspberry Pi Pin 17-GPIO 17

def setup(pin):
global BuzzerPin
BuzzerPin = pin
GPIO.setmode(GPIO.BOARD) # Set GPIO Pin As Numbering
GPIO.setup(BuzzerPin, GPIO.OUT)
GPIO.output(BuzzerPin, GPIO.HIGH)

def on():
GPIO.output(BuzzerPin, GPIO.LOW)

def off():
GPIO.output(BuzzerPin, GPIO.HIGH)

def beep(x):
on()
time.sleep(x)
off()
time.sleep(x)

def loop():
while True:
beep(0.5)

def destroy():
GPIO.output(BuzzerPin, GPIO.HIGH)
GPIO.cleanup() # Release resource

if __name__ == '__main__': # Program start from here
setup(BuzzPin)
try:
loop()
except KeyboardInterrupt: # When 'Ctrl+C' is pressed, the child program destroy() will be executed.
destroy()

#!/usr/bin/env python

import RPi.GPIO as GPIO

import time

BuzzPin = 11 # Raspberry Pi Pin 17-GPIO 17

def setup(pin):

global BuzzerPin

BuzzerPin = pin

GPIO.setmode(GPIO.BOARD) # Set GPIO Pin As Numbering

GPIO.setup(BuzzerPin, GPIO.OUT)

GPIO.output(BuzzerPin, GPIO.HIGH)

def on():

GPIO.output(BuzzerPin, GPIO.LOW)

def off():

GPIO.output(BuzzerPin, GPIO.HIGH)

def beep(x):

on()

time.sleep(x)

off()

time.sleep(x)

def loop():

while True:

beep(0.5)

def destroy():

GPIO.output(BuzzerPin, GPIO.HIGH)

GPIO.cleanup() # Release resource

if __name__ == '__main__': # Program start from here

setup(BuzzPin)

try:

loop()

except KeyboardInterrupt: # When 'Ctrl+C' is pressed, the child program destroy() will be executed.

destroy()

WiringPi Code for Passive Buzzer

#include <wiringPi.h>
#include <softTone.h>
#include <stdio.h>

#define BuzzPin 0

#define CL1 131
#define CL2 147
#define CL3 165
#define CL4 175
#define CL5 196
#define CL6 221
#define CL7 248

#define CM1 262
#define CM2 294
#define CM3 330
#define CM4 350
#define CM5 393
#define CM6 441
#define CM7 495

#define CH1 525
#define CH2 589
#define CH3 661
#define CH4 700
#define CH5 786
#define CH6 882
#define CH7 990

int song_1[] = {CM3,CM5,CM6,CM3,CM2,CM3,CM5,CM6,CH1,CM6,CM5,CM1,CM3,CM2,
CM2,CM3,CM5,CM2,CM3,CM3,CL6,CL6,CL6,CM1,CM2,CM3,CM2,CL7,
CL6,CM1,CL5};

int beat_1[] = {1,1,3,1,1,3,1,1,1,1,1,1,1,1,3,1,1,3,1,1,1,1,1,1,1,2,1,1,
1,1,1,1,1,1,3};


int song_2[] = {CM1,CM1,CM1,CL5,CM3,CM3,CM3,CM1,CM1,CM3,CM5,CM5,CM4,CM3,CM2,
CM2,CM3,CM4,CM4,CM3,CM2,CM3,CM1,CM1,CM3,CM2,CL5,CL7,CM2,CM1
};

int beat_2[] = {1,1,1,3,1,1,1,3,1,1,1,1,1,1,3,1,1,1,2,1,1,1,3,1,1,1,3,3,2,3};

int main(void)
{
int i, j;

if(wiringPiSetup() == -1){ When wiringpi initialization failed printf "WiringPi Failed" 
printf("14CORE | WiringPi initialization failed !");
return 1;
}

if(softToneCreate(BuzzPin) == -1){
printf("14CORE| Soft Tone Failed !");
return 1;
}

while(1){
printf("14CORE| Sound is generated...\n");

for(i=0;i<sizeof(song_1)/4;i++){
softToneWrite(BuzzPin, song_1[i]);
delay(beat_1[i] * 500);
}

for(i=0;i<sizeof(song_2)/4;i++){
softToneWrite(BuzzPin, song_2[i]);
delay(beat_2[i] * 500);
}
}

return 0;
}

#include <wiringPi.h>

#include <softTone.h>

#include <stdio.h>

#define BuzzPin 0

#define CL1 131

#define CL2 147

#define CL3 165

#define CL4 175

#define CL5 196

#define CL6 221

#define CL7 248

#define CM1 262

#define CM2 294

#define CM3 330

#define CM4 350

#define CM5 393

#define CM6 441

#define CM7 495

#define CH1 525

#define CH2 589

#define CH3 661

#define CH4 700

#define CH5 786

#define CH6 882

#define CH7 990

int song_1[] = {CM3,CM5,CM6,CM3,CM2,CM3,CM5,CM6,CH1,CM6,CM5,CM1,CM3,CM2,

CM2,CM3,CM5,CM2,CM3,CM3,CL6,CL6,CL6,CM1,CM2,CM3,CM2,CL7,

CL6,CM1,CL5};

int beat_1[] = {1,1,3,1,1,3,1,1,1,1,1,1,1,1,3,1,1,3,1,1,1,1,1,1,1,2,1,1,

1,1,1,1,1,1,3};

int song_2[] = {CM1,CM1,CM1,CL5,CM3,CM3,CM3,CM1,CM1,CM3,CM5,CM5,CM4,CM3,CM2,

CM2,CM3,CM4,CM4,CM3,CM2,CM3,CM1,CM1,CM3,CM2,CL5,CL7,CM2,CM1

};

int beat_2[] = {1,1,1,3,1,1,1,3,1,1,1,1,1,1,3,1,1,1,2,1,1,1,3,1,1,1,3,3,2,3};

int main(void)

{

int i, j;

if(wiringPiSetup() == -1){ When wiringpi initialization failed printf "WiringPi Failed"

printf("14CORE | WiringPi initialization failed !");

return 1;

}

if(softToneCreate(BuzzPin) == -1){

printf("14CORE| Soft Tone Failed !");

return 1;

}

while(1){

printf("14CORE| Sound is generated...\n");

for(i=0;i<sizeof(song_1)/4;i++){

softToneWrite(BuzzPin, song_1[i]);

delay(beat_1[i] * 500);

}

for(i=0;i<sizeof(song_2)/4;i++){

softToneWrite(BuzzPin, song_2[i]);

delay(beat_2[i] * 500);

}

return 0;

}

Python Code for Passive Buzzer

#!/usr/bin/env python

import RPi.GPIO as GPIO
import time

BuzzerPin = 11

CL = [0, 131, 147, 165, 175, 196, 211, 248] # Low C Note Frequency 
CM = [0, 262, 294, 330, 350, 393, 441, 495] # Middle C Note Frequency
CH = [0, 525, 589, 661, 700, 786, 882, 990] # High C Note Frequency 

song_1 = [ CM[3], CM[5], CM[6], CM[3], CM[2], CM[3], CM[5], CM[6], # Sound Notes 1
CH[1], CM[6], CM[5], CM[1], CM[3], CM[2], CM[2], CM[3],
CM[5], CM[2], CM[3], CM[3], CL[6], CL[6], CL[6], CM[1],
CM[2], CM[3], CM[2], CL[7], CL[6], CM[1], CL[5] ]

beat_1 = [ 1, 1, 3, 1, 1, 3, 1, 1, # Beats of song 1, 1 means 1/8 beats
1, 1, 1, 1, 1, 1, 3, 1,
1, 3, 1, 1, 1, 1, 1, 1,
1, 2, 1, 1, 1, 1, 1, 1,
1, 1, 3 ]

song_2 = [ CM[1], CM[1], CM[1], CL[5], CM[3], CM[3], CM[3], CM[1], # Sound Notes 2
CM[1], CM[3], CM[5], CM[5], CM[4], CM[3], CM[2], CM[2],
CM[3], CM[4], CM[4], CM[3], CM[2], CM[3], CM[1], CM[1],
CM[3], CM[2], CL[5], CL[7], CM[2], CM[1] ]

beat_2 = [ 1, 1, 2, 2, 1, 1, 2, 2, # Beats of song 2, 1 means 1/8 beats
1, 1, 2, 2, 1, 1, 3, 1,
1, 2, 2, 1, 1, 2, 2, 1,
1, 2, 2, 1, 1, 3 ]

def setup():
GPIO.setmode(GPIO.BOARD) # Numbers GPIOs by physical location
GPIO.setup(BuzzerPin, GPIO.OUT) # Set pins' mode is output
global Buzz # Assign a global variable to replace GPIO.PWM
Buzz = GPIO.PWM(BuzzerPin, 440) # 440 is initial frequency.
Buzz.start(50) # Start BuzzerPin pin with 50% duty ration

def loop():
while True:
print '\n Playing song 1...'
for i in range(1, len(song_1)): # Play song 1
Buzz.ChangeFrequency(song_1[i]) # Change the frequency along the song note
time.sleep(beat_1[i] * 0.5) # delay a note for beat * 0.5s
time.sleep(1) # Wait a second for next song.

print '\n\n Playing song 2...'
for i in range(1, len(song_2)): # Play song 1
Buzz.ChangeFrequency(song_2[i]) # Change the frequency along the song note
time.sleep(beat_2[i] * 0.5) # delay a note for beat * 0.5s

def destory():
Buzz.stop() # Stop the BuzzerPin
GPIO.output(BuzzerPin, 1) # Set BuzzerPin pin to High
GPIO.cleanup() # Release resource

if __name__ == '__main__': # Program start from here
setup()
try:
loop()
except KeyboardInterrupt: # When 'Ctrl+C' is pressed, the child program destroy() will be executed.
destory()

#!/usr/bin/env python

import RPi.GPIO as GPIO

import time

BuzzerPin = 11

CL = [0, 131, 147, 165, 175, 196, 211, 248] # Low C Note Frequency

CM = [0, 262, 294, 330, 350, 393, 441, 495] # Middle C Note Frequency

CH = [0, 525, 589, 661, 700, 786, 882, 990] # High C Note Frequency

song_1 = [ CM[3], CM[5], CM[6], CM[3], CM[2], CM[3], CM[5], CM[6], # Sound Notes 1

CH[1], CM[6], CM[5], CM[1], CM[3], CM[2], CM[2], CM[3],

CM[5], CM[2], CM[3], CM[3], CL[6], CL[6], CL[6], CM[1],

CM[2], CM[3], CM[2], CL[7], CL[6], CM[1], CL[5] ]

beat_1 = [ 1, 1, 3, 1, 1, 3, 1, 1, # Beats of song 1, 1 means 1/8 beats

1, 1, 1, 1, 1, 1, 3, 1,

1, 3, 1, 1, 1, 1, 1, 1,

1, 2, 1, 1, 1, 1, 1, 1,

1, 1, 3 ]

song_2 = [ CM[1], CM[1], CM[1], CL[5], CM[3], CM[3], CM[3], CM[1], # Sound Notes 2

CM[1], CM[3], CM[5], CM[5], CM[4], CM[3], CM[2], CM[2],

CM[3], CM[4], CM[4], CM[3], CM[2], CM[3], CM[1], CM[1],

CM[3], CM[2], CL[5], CL[7], CM[2], CM[1] ]

beat_2 = [ 1, 1, 2, 2, 1, 1, 2, 2, # Beats of song 2, 1 means 1/8 beats

1, 1, 2, 2, 1, 1, 3, 1,

1, 2, 2, 1, 1, 2, 2, 1,

1, 2, 2, 1, 1, 3 ]

def setup():

GPIO.setmode(GPIO.BOARD) # Numbers GPIOs by physical location

GPIO.setup(BuzzerPin, GPIO.OUT) # Set pins' mode is output

global Buzz # Assign a global variable to replace GPIO.PWM

Buzz = GPIO.PWM(BuzzerPin, 440) # 440 is initial frequency.

Buzz.start(50) # Start BuzzerPin pin with 50% duty ration

def loop():

while True:

print '\n Playing song 1...'

for i in range(1, len(song_1)): # Play song 1

Buzz.ChangeFrequency(song_1[i]) # Change the frequency along the song note

time.sleep(beat_1[i] * 0.5) # delay a note for beat * 0.5s

time.sleep(1) # Wait a second for next song.

print '\n\n Playing song 2...'

for i in range(1, len(song_2)): # Play song 1

Buzz.ChangeFrequency(song_2[i]) # Change the frequency along the song note

time.sleep(beat_2[i] * 0.5) # delay a note for beat * 0.5s

def destory():

Buzz.stop() # Stop the BuzzerPin

GPIO.output(BuzzerPin, 1) # Set BuzzerPin pin to High

GPIO.cleanup() # Release resource

if __name__ == '__main__': # Program start from here

setup()

try:

loop()

except KeyboardInterrupt: # When 'Ctrl+C' is pressed, the child program destroy() will be executed.

destory()

Wiring the Passive & Active Buzzer with Raspberry Pi

Tagged on: #fourteencore #foutencore 14CORE Raspberry Raspberry Pi Raspberry Pi Basics Raspberry Pi Starter

2 thoughts on “Wiring the Passive & Active Buzzer with Raspberry Pi”

Nikita
at

File “/home/pi/SmartHome/passive_buzzer.py”, line 34, in
GPIO.setup(BuzzerPin, GPIO.OUT) # Set pins’ mode is output
RuntimeError: Please set pin numbering mode using GPIO.setmode(GPIO.BOARD) or GPIO.setmode(GPIO.BCM)
Nikita
at

Python: had to copy setup and setmode commands before the “setup()”. Absolutely no indentation for some reason.

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2 thoughts on “Wiring the Passive & Active Buzzer with Raspberry Pi”

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