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Four Pies

Made by 8BitsAndAByte / 3D Printing / Art / Food & Drinks

About the project

We give you a quick overview and build a project to welcome the Raspberry Pi 4 to the world!

Project info

Difficulty: Easy

Platforms: Adafruit, Raspberry Pi

Estimated time: 1 day

License: Creative Commons Attribution-NonCommercial-ShareAlike CC BY-NC-SA version 4.0 or later (CC BY-NC-SA 4+)

Items used in this project

Hardware components

	Felt	x 1
	Tiny Breadboard	x 1
	Raspberry Pi 3 Model B	x 1

Software apps and online services

Raspberry Pi Raspbian

Hand tools and fabrication machines

	Hot glue gun (generic)	x 1
	3D Printer (generic)	x 1

Story

Overview

Below a quick overview of the content.

Introduction and showcase video
Pie
Pi
3.14
Pies
Result

Introduction and showcase video

To welcome and celebrate the new Raspberry Pi 4, we’re building a project consisting of four Pi(e)s!

Project Video

Pie

Our first pie has two parts, a container and a lid.

Both are based on this great 3d model.

All we have to do is make it bigger, and add an opening for our pies to come out.

Container

Lid

Now we have a basic pie, but it does not look the part.

Using some glue, felt and coloured balls we add some extra pie-ness.

There’s a great tutorial on how to exactly do this right here.

Some raspberry styling

Pi

Our pie will hold everything we need, and one of them is our Raspberry Pi 4.

Configuring and powering is done the usual way.

They have a very neat guide on exactly how right here.

If you want to know more details about this new Pi, look no more.

3.14

We want our Pi in our pie to calculate π. To achieve this there’s a bit of python code.

def calculatePi():
  os.system('echo "scale=2000;4*a(1)"|bc -l')

You can play with the precision by changing the scale. The higher the scale, the longer it will take.

Pies

We have a Pi within a pie that calculates π.

The last step is to add some pies.

This requires two things, some ASCII art and a little thermal printer.

First of all, our ASCII pie, thanks to this great website!

We have our ASCII pie, next is connecting the thermal printer. All we need to do is follow the steps outlined here.

Printing them pies

You can find the complete code in the ‘Code’ section.

Result

Now we have a Raspberry Pi 4, in a pie, calculating π, and printing pies!

What better way to welcome the new Raspberry Pi 4 then a Pi(e)fest!

Code

import os
import sys
import time
import re

# Setup our printer
def setup():
    os.system("stty -F /dev/serial0 19200")

# Calculate pi using the system
def calculatePi():
    os.system('echo "scale=2000;4*a(1)"|bc -l')

# Print them pies!
def printPies():
    
#     width of our paper. this many character fit on a single
    width = 32

# Barrier to print between every pie
    barrier = width * '*'

# Our asci art pie
    pi = (
            "                (               "
            "                 )              "
            "            __..---..__         "
            "        ,-=   \  |  /   =-.     "
            "       :--..___________..--;    "
            "        \.,_____________,./     "
        )

#   Command to print   
    os.system('echo "' + pi + '\\n" > /dev/serial0')

try:

    setup()

    while True:

        print('start')
        calculatePi()

        print('done')
        printPies()
        
        time.sleep(2)

except KeyboardInterrupt:
    sys.exit()

Credits

8BitsAndAByte

We’re Dane & Nicole, two makers that create tremendously terrible tech, which we happily share with you on our channel! https://www.youtube.com/c/8bitsandabyte

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