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Grumpy Tv

Made by 8BitsAndAByte / Art / Artificial intelligence / Retro Tech / Robotics / Voice

About the project

A television that tells you off whenever you look at it. The future is now!

Project info

Difficulty: Moderate

Platforms: Adafruit, Raspberry Pi

Estimated time: 2 days

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

	Mini External USB Stereo Speaker	x 1
	Raspberry Pi Camera Module	x 1
	Raspberry Pi 3 Model B	x 1
	MG90S Servo	x 2
	Spray paint	x 1
	Cardboard	x 1
	Black Fabric Furniture Pads	x 1
	Plastic ornament ball	x 1
	Fabric for bow tie	x 1

View all

Software apps and online services

	OpenCV
	Ttsmp3
	Tinkercad

Hand tools and fabrication machines

	Fabric Scissors	x 1
	Sewing Machine	x 1
	Utility Knife	x 1
	Hot glue gun (generic)	x 1
	3D Printer (generic)	x 1
	Multitool, Screwdriver	x 1
	Drill / Driver, Cordless	x 1

Story

Project Video

Remove the Internals

This step comes with a GIANT warning: These old picture tubes can keep their charge for a very long time and they need to be discharged if you want to make any modifications!

DO NOT TRY DISCHARGING A PICTURE TUBE YOURSELF!

Ask someone who knows what they are doing. We went to a local electronics shop, where they discharged it for us.

YOU CAN DIE IF YOU DO IT WRONG!

After the tube is professionally discharged, we can remove all the broken electronics to make space for the new ones. Depending on which set you got, this step needs a variety of tools and some gentle brute force.

There are some tips to keep in mind while taking it apart. For one, put all the buttons, knobs and screws in a separate little bag. We will need them to make the robot look its sharpest.

Electronics

With our newly created space, we can start adding our own electronics. We want to the TV to keep its nice retro look, so the only change we make is drilling two holes in the top. Once drilled we can attach the servo's with some hot glue.

Next up is the Pi Camera, which we will use for the computer vision. With some glue we secure it behind one of the old buttons.This makes it very difficult to spot for any unsuspecting passerby (see picture)!

The last two bits to add are a Raspberry Pi and a Mini USB Speaker.

We will setup the Pi Camera in the next step, so for now plug in the speaker and connect the two servos.

Adding Personality

Now we can start adding some much needed personality to this rather grey telly.

Eyes are the best way to start. To make his headlights we take two see-through Christmas balls and spray paint the insides white. Adding black felt furniture pads completes the look.

We want to attach them to the servos, to achieve this we cut two cardboard circles which neatly fit inside the eyeball and glue these onto our custom servos hubs. The file to 3D print these hubs is attached. All that is left to do is click his peepers on the servos.

Putting back some of the knobs and buttons removed in step one, and adding a bow tie we made by following this tutorial makes him look like the dapper device he is.

Audio & Code

This step is all about making the previous steps work. Right off the bat we want to generate the audio files. These will consist of a collection with angry yells and insults. A great website to use is ttsmp3, you can play around with all the voices and options, there are plenty. We settled on the ones shown in the picture.

Last but not least we need to setup our Pi, install the needed software and write the code to bring our grouch to life. This guide is great to get the Pi up and running and this one is perfect to enable the Pi Camera.

With the configuration done, we need to install some extra software, open up the terminal on the Pi and execute the following commands:

sudo apt-get install python-opencvsudo apt-get install mpg123

These commands first installs OpenCV and then the mpg123 audio player.

So far so good, now we can start writing the code.The full working version is included, so below a quick look at how it works.

Take a picture with the Pi Camera
Using OpenCv detect any faces

If there is a face:

Select a random audio file and play it
Move the servos back and forth
If there is a face:Select a random audio file and play itMove the servos back and forth

Result!

All done!Now you can run the script and enjoy the company of this questionable creation!

CAD, enclosures and custom parts

grumpytvhub_ODaC6AeO2i.stl

Go to download

Code

haarcascade_frontalface_default.xml

<?xml version="1.0"?>
<!--
    Stump-based 24x24 discrete(?) adaboost frontal face detector.
    Created by Rainer Lienhart.

////////////////////////////////////////////////////////////////////////////////////////

  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.

  By downloading, copying, installing or using the software you agree to this license.
  If you do not agree to this license, do not download, install,
  copy or use the software.


                        Intel License Agreement
                For Open Source Computer Vision Library

 Copyright (C) 2000, Intel Corporation, all rights reserved.
 Third party copyrights are property of their respective owners.

 Redistribution and use in source and binary forms, with or without modification,
 are permitted provided that the following conditions are met:

   * Redistribution's of source code must retain the above copyright notice,
     this list of conditions and the following disclaimer.

   * Redistribution's in binary form must reproduce the above copyright notice,
     this list of conditions and the following disclaimer in the documentation
     and/or other materials provided with the distribution.

   * The name of Intel Corporation may not be used to endorse or promote products
     derived from this software without specific prior written permission.

 This software is provided by the copyright holders and contributors "as is" and
 any express or implied warranties, including, but not limited to, the implied
 warranties of merchantability and fitness for a particular purpose are disclaimed.
 In no event shall the Intel Corporation or contributors be liable for any direct,
 indirect, incidental, special, exemplary, or consequential damages
 (including, but not limited to, procurement of substitute goods or services;
 loss of use, data, or profits; or business interruption) however caused
 and on any theory of liability, whether in contract, strict liability,
 or tort (including negligence or otherwise) arising in any way out of
 the use of this software, even if advised of the possibility of such damage.
-->
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This file has been truncated, please download it to see its full contents.

tv.py

import cv2 
from gpiozero import Servo
import time
import threading
import os
import random
from picamera.array import PiRGBArray
from picamera import PiCamera

face_cascade = cv2.CascadeClassifier('/home/pi/Desktop/tv/haarcascade_frontalface_default.xml') 

cap = cv2.VideoCapture(0) 

leftEyeServo = Servo(20)
rightEyeServo = Servo(21)

rightEyeServo.detach()
leftEyeServo.detach()

global eyeMovement
eyeMovement = False

def playAudio():

    names = [name for name in os.listdir('/home/pi/Desktop/tv/audio/')]
    total = len([name for name in os.listdir('/home/pi/Desktop/tv/audio/')])

    randomInt = random.randint(0, total-1)
    print(total)

    name = '/home/pi/Desktop/tv/audio/'+names[randomInt]
    print('mpg123 '+name)

    os.system('mpg123 ' + name)

def moveEyes():

    global eyeMovement

    while eyeMovement:

        rightEyeServo.max()
        leftEyeServo.min()
        time.sleep(0.2)

        rightEyeServo.min()
        leftEyeServo.max()
        time.sleep(0.2)

    rightEyeServo.mid()
    leftEyeServo.mid()
    time.sleep(0.4)
    
    rightEyeServo.detach()
    leftEyeServo.detach()
    return

camera = PiCamera()
rawCapture = PiRGBArray(camera)
time.sleep(0.1)

while True: 

    print('SNAP!')
    rawCapture.truncate(0)
    camera.capture(rawCapture, format="bgr")
    image = rawCapture.array 

    faces = face_cascade.detectMultiScale(image, 1.3, 5) 

    if len(faces) > 0:

        print('FACE!')
        
        eyeMovement = True
        moveEyesThread = threading.Thread(target=moveEyes)
        moveEyesThread.start()

        playAudioThread = threading.Thread(target=playAudio())
        playAudioThread.start()

        eyeMovement = False
    
    time.sleep(0.05)

cap.release()

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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About the project

Project info

Items used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Project Video

Remove the Internals

Electronics

Adding Personality

Audio & Code

Result!

CAD, enclosures and custom parts

grumpytvhub_ODaC6AeO2i.stl

Code

haarcascade_frontalface_default.xml

tv.py

Credits

8BitsAndAByte

Leave your feedback...

Shop

Project Hub

Video

Blog

Shop home

3D printing

Single Board Computers

Development kits

Sensors

Internet of things

Robotics

Accessories

Product of the Week

Electromaker Educator

The Electromaker Show

The Electromaker Podcast

Grumpy Tv

About the project

Project info

Items used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Project Video

Remove the Internals

Electronics

Adding Personality

Audio & Code

Result!

CAD, enclosures and custom parts

grumpytvhub_ODaC6AeO2i.stl

Code

haarcascade_frontalface_default.xml

tv.py

Credits

8BitsAndAByte

Leave your feedback...

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