GPIO and Python (6/9) - Buzzer

By The Pi HutOct 21, 20130 comments

In this project you will learn how to wire and program a buzzer. Let’s all make lots of annoying noises. This will be an SOS program

Things you will need:

Raspberry Pi + SD Card
Keyboard + Mouse
Monitor + HDMI Cable
Power Supply
Breadboard
1x Red LED
1x Blue LED
2x 330? Resistor
2x M/M Jumper Wire
5x M/F Jumper Wire
1x Button
1x Buzzer

Prerequisites:

Latest version of Rasbian installed on your SD Card
Raspberry Pi setup with a keyboard, mouse and monitor

1. Change the current directory to our gpio_python_code directory:

cd gpio_python_code

2. Start by creating a file for our buzzer script

touch 6_morsecode.py

3. Edit the 6_morsecode.py script using nano 6_morsecode.py add the following code:

#!/usr/bin/python



import os

from time import sleep

import RPi.GPIO as GPIO



GPIO.setmode(GPIO.BCM)

GPIO.setup(22,GPIO.OUT)



loop_count = 0



# define a function called morsecode

def morsecode ():

    #Dot Dot Dot

    GPIO.output(22,GPIO.HIGH)

    sleep(.1)

    GPIO.output(22,GPIO.LOW)

    sleep(.1)

    GPIO.output(22,GPIO.HIGH)

    sleep(.1)

    GPIO.output(22,GPIO.LOW)

    sleep(.1)

    GPIO.output(22,GPIO.HIGH)

    sleep(.1)



    #Dash Dash Dash

    GPIO.output(22,GPIO.LOW)

    sleep(.2)

    GPIO.output(22,GPIO.HIGH)

    sleep(.2)

    GPIO.output(22,GPIO.LOW)

    sleep(.2)

    GPIO.output(22,GPIO.HIGH)

    sleep(.2)

    GPIO.output(22,GPIO.LOW)

    sleep(.2)

    GPIO.output(22,GPIO.HIGH)

    sleep(.2)

    GPIO.output(22,GPIO.LOW)

    sleep(.2)



    #Dot Dot Dot

    GPIO.output(22,GPIO.HIGH)

    sleep(.1)

    GPIO.output(22,GPIO.LOW)

    sleep(.1)

    GPIO.output(22,GPIO.HIGH)

    sleep(.1)

    GPIO.output(22,GPIO.LOW)

    sleep(.1)

    GPIO.output(22,GPIO.HIGH)

    sleep(.1)

    GPIO.output(22,GPIO.LOW)

    sleep(.7)



os.system('clear')

print "Morse Code"



loop_count = input("How many times would you like SOS to loop?: ")



while loop_count > 0:

    loop_count = loop_count - 1

    morsecode ()

4. Execute your 6_morsecode.py script

sudo python 6_morsecode.py