Buying a Raspberry Pi 4 and Installing Raspbian Buster

Ron Mourant
4 min readJul 30, 2019



When you purchase a Raspberry Pi 4, you will need some additional items to make it operational. These include: 1) monitor, 2) keyboard, 3) mouse, 4) power supply, 5) HDMI cable to connect to the monitor, and 6) an operating system (Raspbian Buster) on a micro SD card.


From: Pimoroni Ltd.
Raspberry Pi 4–4GB RAM (1 GB and 2 GB models are also available.)

From Staples:
Dell E Model E2318HR 23" LED Monitor, Black (Similar HDMI monitors are ok.)

From: Adafruit:
Official Raspberry Pi Keyboard — Black and Gray

From Adafruit:
Official Raspberry Pi USB Optical Mouse — Black and Gray

From Chicago Electronic Distributors:
C1145 Raspberry Pi Heat Sink (Default Title)
C1216 Raspberry Pi 4 Power Supply in White or Black (Black)
C1220-red Official Raspberry Pi 4 Case (Red/White)
C1219 Micro-HDMI to Standard HDMI Adapter

From Amazon:
SanDisk Ultra 32GB UHS-I/Class 10 Micro SDHC Memory Card With Adapter

Putting the Raspbian Bluster Image On Your Micro SD Card

Go to and click on the RASPBIAN icon. For Raspbian Buster with desktop, click on the Download ZIP button. The Raspbian Bluster Image downloads to your PC, Mac or Linux computer. It should appear something like: 2019–07–10-raspbian-buster-full.img

You need to “flash” this image file to a micro SB card. If you do not have balenaEtcher on your computer go to: and download it.

Put your micro SB card in its holder and insert it into your computer. Start the balenaEtcher application and drag your image file (2019–07–10-raspbian-buster-full.img) to the + icon about Select Image. Click the Flash! button and wait till the process finishes. Remove your micro SB card holder.

Hooking Things Up

The image below is to help with the hook ups. You can see the labels for the USB ports (2.0 and 3.0), Power Port (via USB-C), HDMI inputs (via 2 micro HDMI ports), and the Micro SD Card Slot.

Connect the following to your computer:

a) the USB mouse and the USB keyboard into the USB 2.0 ports.
b) the HDMI cable from your monitor into one of the micro HDMI ports.
c) the micro-SD card into its slot.
d) the micro USB-C end of the power supply into its Power Port.

Power Up!
Turn on your monitor.
The Raspberry Pi does not have a power switch. To turn it on, you plug it in. To turn it off, you unplug it.
Plug in the power supply to start the boot-up process.

On the first boot of the Raspbian Buster OS, it automatically expands “RAM” to the capacity of the micro-SD card.

Follow the instructions on your monitor to configure your Raspberry Pi.
You will need the password to your wifi network.

The Configuration Application (raspi-config)

Setup parameters can be easily changed using the raspi-config progam.

Click Menu in the upper left corner of the screen.
Select Preferences in the dropdown menu.
Select Raspberry Pi Configuration under Preferences.
The graphical user interface of the raspi-config program is easy to follow.

You can also use raspi-config from the command line (in a Terminal window). For detailed information on this go to:

Updating Raspbian Buster

It is a good idea to update and upgrade your Raspberry Pi before installing new software.
From the Desktop, open a Terminal window by clicking its icon (on the top command bar). Type:

$ sudo apt-get update
$ sudo apt-get upgrade

nano Editor

The nano editor is included with the Raspbian Buster software. It can be used from the command line in a Terminal window. A short introduction to the nano editor is at:

How to Edit config.txt

The Raspberry Pi computer does not have a conventional BIOS. It uses the text file, “config.txt” (stored on the mini SD) for storing some configuration parameters.
From a terminal window type:
$ sudo nano /boot/config.txt

An example of using the config.txt is to change your display size. The file config.txt contains the following lines:
# uncomment to force a console size. By default it will be display’s size minus
# overscan.

Uncomment the above 2 lines and type in your desired width and height.
Save the file. Reboot your Rasperry Pi computer by typing:
$ sudo reboot
to put your changes into effect.

More information on config.txt can be found at:

Where To Go From Here

The Raspberry Pi Foundation provides lots of support for Raspberry Pi owners. Throughly explore their web site at:

They offer free PDF editions of their monthly magazine, MagPi, and other resources at:

There are many exciting projects to do!



Ron Mourant

TinyML, AI, Edge Impulse, Arduino, Raspberry Pi, Pickleball