8bitsandabyte
Published © CC BY-NC-SA

Mooomba - The Cow Roomba

Always wanted a cow, but don't have the space? Build yourself this Roomba-sized cow!

IntermediateFull instructions providedOver 1 day764
Mooomba - The Cow Roomba

Things used in this project

Hardware components

Raspberry Pi 3 Model B
Raspberry Pi 3 Model B
×1
Grove - 2-Channel SPDT Relay
Seeed Grove - 2-Channel SPDT Relay
×1
Battery Holder, AA x 8
Battery Holder, AA x 8
×1
Powerbank 5v 2.1A
×1
Adafruit Mini External USB Stereo Speaker
×1
Wheels
×2
DC Motor - 37mm - 12V - 50RPM
×2
Swivel Wheel
×1
Cow
×1
Fake grass
×1
Wooden Platform
×1

Software apps and online services

Raspbian
Raspberry Pi Raspbian

Hand tools and fabrication machines

Hot glue gun (generic)
Hot glue gun (generic)
3D Printer (generic)
3D Printer (generic)
Paint
Multitool, Screwdriver
Multitool, Screwdriver
Scissors, Free Fall
Scissors, Free Fall

Story

Read more

Custom parts and enclosures

Bracket

Code

Code

Python
import RPi.GPIO as GPIO  
import time  
import random
import os

GPIO.cleanup()
GPIO.setmode(GPIO.BCM)  

left = 20
right = 21
GPIO.setup(left, GPIO.OUT) 
GPIO.setup(right, GPIO.OUT) 



def turnLeft():

    print("Left!")
    GPIO.output(left, GPIO.LOW)  
    time.sleep(2)
    GPIO.output(left, GPIO.HIGH)


def turnRight():
    print("Right!")
    GPIO.output(right, GPIO.LOW)  
    time.sleep(2)
    GPIO.output(right, GPIO.HIGH)

def forward():

    print("Forward!")
    GPIO.output(left, GPIO.LOW)  
    GPIO.output(right, GPIO.LOW)

    time.sleep(2)  

    GPIO.output(left, GPIO.HIGH)  
    GPIO.output(right, GPIO.HIGH)  

def playAudio():
    # Collect all the names of the images in out folder and the amount
    names = [name for name in os.listdir('/home/pi/Desktop/moomba/audio')]
    total = len([name for name in os.listdir('/home/pi/Desktop/moomba/audio')])

    # Generate a random number, -1 because our index start at 0
    randomInt = random.randint(0, total-1)
    print(total)

    # Fetch the name belonging to this random number
    name = '/home/pi/Desktop/moomba/audio/'+names[randomInt]
    print(name)

    #Play the audio
    os.system('mpg123 ' + name)
    time.sleep(0.2)

def turnOff():
    print('Off')
    GPIO.output(left, GPIO.HIGH)  
    GPIO.output(right, GPIO.HIGH)  

while True:

    actionInt = random.randint(0,3) 

    if actionInt == 0:
        forward()
    elif actionInt == 1:
        turnRight()
    elif actionInt == 2:
        turnLeft()
    elif actionInt == 3:
        playAudio()

    time.sleep(2)

Credits

8bitsandabyte

8bitsandabyte

3 projects • 29 followers
We’re Dane & Nicole, two makers that create tremendously terrible tech, which we happily share with you on our channel!

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