Digital Electronics (USIU)

Digital Electronics

Study of Logic Gates – AND, OR, NOT

In-Lab Exercise 1: Realizing a AND gate

• Step 1

• Step 2  load the python code into your favorite code editor and copy paste the following code and save it as buttonpressed.py

In our case we used the command line and opened the nano editor and added the following code

#nano buttonpressed.py

import RPi.GPIO as GPIO

import time

#import random

GPIO.setmode(GPIO.BCM)

GPIO.setup(6,GPIO.IN,pull_up_down = GPIO.PUD_UP)

while True:

   input = GPIO.input(6)  

   if input == False:

       print ("Button Pressed")

       time.sleep(0.2)  

In-Lab Exercise 2: Realizing a OR gate

• Step 1  Connect the Circuit as shown in the image below

• Step 2  load the python code into your favorite code editor and copy paste the following code and save it as LightsOn.py
• In our case we used the command line and opened the nano editor and added the following code

#nano LightsOn.py

import RPi.GPIO as GPIO

import time

GPIO.setmode(GPIO.BCM)

GPIO.setwarnings(False)

led = 4

GPIO.setup(led, GPIO.OUT)

GPIO.output(led,1)

time.sleep(0.5)

GPIO.output(led, 0)

time.sleep(0.05)

In-Lab Exercise 3: Realizing a NOT gate

• Step 1  Connect the Circuit as shown in the image below

• Step 2  load the python code into your favorite code editor and copy paste the following code and save it as SwitchLightsOn.py

In our case we used the command line and opened the nano editor and added the following code

#nano SwitchLightsOn.py

import RPi.GPIO as GPIO

import time

GPIO.setmode(GPIO.BCM)

GPIO.setup(6,GPIO.IN,pull_up_down = GPIO.PUD_UP)

led = 4

GPIO.setup(led, GPIO.OUT)

while True:

   input = GPIO.input(6)

   if input == False:

       print ("Button Pressed")

       time.sleep(0.2)

       GPIO.output(led,1)

       time.sleep(0.5)

       GPIO.output(led, 0)

       time.sleep(0.05)