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Convert your Old tv into Desktop Computer with rasberry pi 4

 Look at the corner in store room, there will be lying an unused old television .Is there ???         hurray !!! Grab your tools dude we are on work .
We are now going to test if its still displays anything ,if nothing displays i am sorry dude.

You can even watch the making video instead of reading.click here >>

Choose the language for video English / Tamil






Let's see what are the required components:

1. Rasberry pi 4 Click here to buy

2. HDMI to HDMI  micro cable Click here to buy

3. HDMI toAV converter Click here to buy!

4. 5V 3A power supply Click here to buy

5. led strip Click here to buy!

6. CPU fan Click here to buy!

7. Rasberry pi case  Click here to buy

Or rasberry pi complete kit Click here to buy!


Rasberry pi 4

This rasberry pi is a low cost computer with lots and lots of features bulit-in .
its has in built wifi  , bluethooth, lan, hdmi output, audio jack ,4gb ram and we can use smaall sd cards as storage drives.

link for buying this module :


BUILDING CASE FOR RASBERRY PI

If you don't like in building one ,you can simply buy one from here.

link for buying rasberry pi case :

Incase you are building your own case follow these steps :
  
 Pick up a piece of wood. Drill four holes for mounting the pi

Use these kind of mounting screw on adjacent sides of pi and tight it


 Then take another screw for tightly attaching the pi with wood


Over the mounting screw we need a plate for placing the exhaust fan so i choose a hard board


On its bottom i have attached some led strips to make it even beautiful 


Then fix this plate over the screws and tight it with nuts


Now its timeto call our cpu fan and using nuts and bold we can attach it together



Let's test by connecting the led and fan wire in parallel connection 


Pat you backs up!!!! We have completed the pi case ourself. 

BOOTING SD CARD 


Plug the sd card into your pc and install the rasberry pi image 

Rasberry pi image file - Download



Under storage option choose the sd card  and from os option choose rasbian (which appears in first )

Now click *WRITE* ,It will shart booting your sd card with img file.This might take upto 15 minutes.

Once completed insert your sd card into the pi

AUDIO / VIDEO OUTPUT

The rasberry pi can be connected to 2 monitors at a time, but not in this video.


 We need to connect the micro humi pin to rasberry pi and the other is the output for tv



 Since my tv doesn't support or has hdmi feature i have to use hdmi to av converter for this project, which does the job for me.







Now connect the other end of the cable to our TV




POWER SUPPLY 

Our rasberry pi needs 5v 3A power supply with usb C type and in addition we need a 12v power supply for the exhaust fan and led strip.




Insert the usb c Plug into rasberry pi and Check whether it is working , a red light in pi indicates it is powered.

Earthing problem

 Sometimes the old give out shock ,due to leakage of current . To overcome this Take a lengthy wire connects its one end to the place where you can feel shock or in any metal conductor in pi .Then the other end is connected to any metal conductor in room or steel window.
Problem not solved yet! .Call a nearby electrician. 


Black borders on rasberry pi

  Now take a deep breath! You did it...if not try from start.but here the screen is not correctly place, it has some black borders in top and left..

You need a wireless/wired keyboard and mouse 
Take its dongle and insert in the usb port



If the font size is too low.do the following:
  ●right click anywhere on the desktop 
  ● choose desktop  preference on the bottom 
  ● Choose SYSTEM  and choose the required font size and font type .
  ● Click ok to apply changes.
Now lets fix the screen borders.Open terminal by  pressing "ctrl +alt + t "(Sorry the picture contains wrong Command).

● To zoom the terminal "ctrl + shift + +"


Type "sudo su root" and type "nano /boot/config.txt" to open configuration file.

Once the configuration file is opened ,Search for a word "#disable_overscan =1" and remove the # symbol  (only if black borders is on all side i.e it will zoom the overall screen)

or you can separately change the border on each side by removing # and changing the value 

"#disable_overscan_left =16"
"#disable_overscan_right =16"
"#disable_overscan_top =16"
"#disable_overscan_bottom =16"


Then press "ctrl+ s" for saving the file and "ctrl +x" for for closing the file.

Then reboot the system by typing "reboot"
If your problem is solved hurrayyyy!!!!. If not again change the value and Check again .

Customize Everything 



I have changed the wallpaper and arranged the wires ,now its look like something Cool ♡♡.

If you want to watch the full making video of this . Click down the video 










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