WAP

A. WAP in python/C++ language to turn ON/OFF buzzer.

import RPi.GPIO as GPIO
from time import sleep

GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)
Buzzer=18
GPIO.setup(Buzzer, GPIO.OUT,initial=GPIO.LOW)
while True:
GPIO.output(Buzzer,True)
sleep(1)
GPIO.output(Buzzer,False)
sleep(1)

B. WAP in python/C++ language to toggle two LED’s.

import RPi.GPIO as GPIO
from time import sleep

GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)
RED_LED=14
GREEN_LED=15
GPIO.setup(RED_LED,GPIO.OUT,initial=GPIO.LOW)
GPIO.setup(GREEN_LED,GPIO.OUT,initial=GPIO.LOW)
while True:
GPIO.output(RED_LED,True)
GPIO.output(GREEN_LED,False)
sleep(1)
GPIO.output(RED_LED,False)
GPIO.output(GREEN_LED,True)
sleep(1)

C. WAP in python/C++ language to blink LED.

import RPi.GPIO as GPIO
import time
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
cnt=0
Blink_Time=1
RED_LED=14
GPIO.setup(RED_LED,GPIO.out)
while True:
if cnt==0:
GPIO.output(RED_LED,False)
cnt=1
else:
GPIO.output(RED_LED,True)
cnt=0
time.sleep(Blink_Time)
GPIO.cleanup()